ateccx08: inttial implementation for ATECCx08

This working implementation for the ATECCx08 family of cryptgraphic processors
has random number generation and other needed supporting functions.

It also includes a sample of how to connect it to the Go crypto/rand package.

More cryptographic functions await a future interation.

Signed-off-by: deadprogram <ron@hybridgroup.com>

.circleci/config.yml

@@ -1,17 +0,0 @@
-# Golang CircleCI 2.0 configuration file
-#
-# Check https://circleci.com/docs/2.0/language-go/ for more details
-version: 2
-jobs:
-  build:
-    docker:
-      - image: tinygo/tinygo-dev
-    steps:
-      - checkout
-      - run: tinygo version
-      - run:
-          name: "Enforce Go Formatted Code"
-          command: make fmt-check
-      - run:
-          name: "Run build and smoke tests"
-          command: make smoke-test

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: Build
+
+on:
+  pull_request:
+  push:
+    branches:
+      - dev
+      - release
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: tinygo/tinygo-dev
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: TinyGo version check
+        run: tinygo version
+      - name: Enforce Go Formatted Code
+        run: make fmt-check
+      - name: Run unit tests
+        run: make unit-test
+      - name: Run build and smoke tests
+        run: make smoke-test

.gitignore

@@ -1 +1,2 @@
 build
+.vscode/

CHANGELOG.md

@@ -1,3 +1,279 @@
+0.23.0
+---
+- **new devices**
+    - Add GC9A01 Driver (#452)
+    - Initial support for VL6180x sensor
+
+- **enhancements**
+    - **rtl8720dn**
+        - refactor by bringing this driver more in line with wifinina and espat
+    - **ssd1306**
+        - add getter method to the current buffer
+    - **makeybutton**
+        - revise to better match the algorithm defined by the original
+    - **espat,wifinina,rtl8720dn**
+        - change ssid/pass from const to var
+
+- **bugfixes**
+    - **microbitmatrix**
+        - fix inverted axis
+    - **espat**
+        - Trim quotes from IP returned by espat's GetDNS()
+    - **all**
+        - correct go fmt
+
+- **examples**
+    - **rtl8720dn**
+        - remove wifi setting
+        - add call to optional debug setting
+        - update all remaining examples for refactored API
+
+
+0.22.0
+---
+- **new devices**
+    - epd: add waveshare 2.9in (v1)
+    - makeybutton: add driver for MakeyMakey-like button
+
+- **enhancements**
+    - **rtl8720dn**
+        - add UDP close function
+        - improve error handling
+    - **net/http**
+        - improve header parsing
+        - add last-will-and-testament to MQTT
+    - **net/mqtt**
+        - adds keepalive pinging, disconnect, and graceful goroutine cleanup
+        - support for cookies when https
+        - add support for retained messsages
+
+- **bugfixes**
+    - irremote: Fix irremote reporting incorrect NEC addresses and command codes (#422)
+    - net/http:  Fix http.Get() with port specification
+
+- **build**
+    - Makefile recursively finds unit-tests
+    - switching to GHA
+
+- **updates**
+    - update tinyfont to v0.3.0
+    - update tinyfs to v0.2.0
+
+- **examples**
+    - rtl8720dn: add ./examples/rtl8720dn/version
+
+
+0.21.0
+---
+- **new devices**
+    - lsm6ds3tr: initial implementation
+    - UC8151: used in Pimoroni's badger2040 e-paper (#416)
+    - scd4x: implement driver for CO2 sensor
+
+- **enhancements**
+    - easystepper: Add support for '8-step mode'
+    - vl53l1x: Add functions for setting the device address
+    - sdcard: support thingplus-rp2040
+    - wifinina: add mutex to prevent communication race problems
+    - **ws2812**
+        - support thingplus-rp2040 board
+        - Added 125 MHz rp2040 timing
+        - Added unsafe.Pointer for pointer conversion
+
+- **bugfixes**
+    - ssd1351: Fix mirrored text on OLED display
+
+
+0.20.0
+---
+- **new devices**
+    - irremote: Add basic infra-red driver
+    - IS31FL3731: add driver for IS31FL3731 matrix LED driver (#370)
+    - l3gd20: add gyro driver
+    - SSD1289: Driver for SSD1289 LCD
+
+- **enhancements**
+    - **ili9341**
+        - add support for atsame5x
+        - added Feather board support to InitDisplay()
+        - avoid heap allocations
+    - **lps22hb**
+        - pin rename, sync with main repo
+    - **lsmXXX**
+        - unified, error handling, memory management
+    - **max7xx**
+        - Add a SetIntensity() function to max7xx driver and example
+    - **vl53l1x**
+        - Add functions for setting 'region of interest'
+        - Fix switch-case semantics
+    - **ws2812**
+        - add support for m5stamp-c3
+        - convert AVR assembly to C inline assembly
+        - support high-MHz ARMv6M chips like the RP2040
+        - write inline assembly using C instead of Go
+
+- **bugfixes**
+    - **dht**
+        - fix error check in example
+        - fix humidity and temperature extraction for DHT22 (#358)
+    - **esp8266**
+        - fix ConnectToAccessPoint timeout args
+    - **image**
+        - fix interface
+    - **pca9685**
+        - add buffered one shot write
+        - fix on=0 bug
+    - **wifinina**
+        - correct sendParamStr to handle empty strings, such as when connecting to an unsecured access point
+
+0.19.0
+---
+- **new devices**
+    - ft6336: add support for ft6336
+    - pca9685: PCA9685 driver
+    - shtc3: Sensirion SHTC3 Relative Humidity / Temperature i2c sensor
+    - sx126x: Driver for Semtech sx126x radio modules
+    - xpt2046: XPT2046 Touch driver (#350)
+- **enhancements**
+    - **hd44780i2c** 
+        - clean up for go fmt
+        - Needed fixes and update hd44780i2c.go
+    - **ili9341, ili9342**
+        - add support for m5stack
+        - add support for m5stack-core2
+    - **wifi**
+        - modify to use shared net.Adapter interface for all supported wifi devices
+    - wifinina: remove busy wait
+- **bugfixes**
+    - **hd44780** 
+        - fix 4-bit data length flag
+        - Reset data pins to output mode after reading
+    - Nano 33 BLE drivers (#351)
+- **docs**
+    - examples/wifi: add unified example for tcpclient that compiles for all supported wifi adaptors
+
+0.18.0
+---
+- **new devices**
+    - apds9960: add support for APDS-9960 Digital Proximity sensor
+    - axp192: add support for AXP192 single Cell Li-Battery and power system management IC
+    - hts221: add support for HTS221 capacitive digital sensor for relative humidity and temperature
+    - i2csoft: add support for software I2C
+    - image: add support for image/jpeg and image/png
+    - lps22hb: add support for LPS22HB MEMS nano pressure sensor
+    - lsm6dox: add support for lsm6dox accelerometer
+    - lsm9ds1: add support for lsm9ds1 accelerometer
+- **enhancements**
+    - ili9341: change to use drivers.SPI interface
+    - **ws2812**
+        - generate assembly instead of handwriting it
+        - improve timings to be compatible with the WS2811
+        - add support for 168MHz (e.g. Adafruit Feather STM32F405)
+        - add support for RISC-V
+    - wifinina: control nina pins, for example leds
+- **docs**
+    - rtl8720dn: examples for tcpclient, udpstation, mqtt, and webserver
+    - **wifinina** 
+        - nina-fw update docs
+        - examples/wifinina/http-get
+    - ili9341: refactor examples
+    - Fix broken link for SHT3x datasheet
+- **core**
+    - all: use build directives for both Go1.17 and earlier versions
+- **bugfixes**
+    - net: fix raddr of tcp conn
+    - mcp3008: fix bitshift bug
+
+0.17.1
+---
+- To correct an error in the release process. Same as 0.17.0.
+
+0.17.0
+---
+- **new devices**
+    - rtl8720dn: add support for rtl8720dn
+    - sdcard: add support for spi sdcard driver, along with fatfs
+- **enhancements**
+    - apa102: use 4-byte buffer to improve speed
+    - bmi160: avoid heap allocations
+    - ili9341: add standard SPI driver
+    - wifinina
+        - avoid fmt package
+        - Fix RSSI command for WiFiNINA + Print current SSID + Wait for correct time before printing it out + Cleanup
+    - ws2812
+        - rename the pin to ws2812
+        - add tag for nrf52833
+        - Disable interrupts before sending ws2812 data
+        - add support for qtpy and atsame5x
+- **core**
+    - modules: switch to use tinygo-org version of tinyfs package
+    - all: use machine.Serial as the default output
+
+0.16.0
+---
+- **new devices**
+    - aht20: add device
+    - ina260: add new i2c device
+    - keypad: add 4x4 keypad driver (#226)
+    - max7219: add driver support
+    - mcp2515: add support for mcp2515 CAN device
+    - p1am: support the P1AM-100 hardware watchdog
+    - pcf8563: add support for pcf8563 real time clock
+    - servo: add driver using PWM
+    - tm1637: add support for tm1637 7-segment LED
+    - tone: add package for producing tones using the PWM interface
+- **enhancements**
+    - pwm: update drivers with PWM to use new interface
+    - wifinina: Make TLS work over WiFiNINA Verified on Arduino Nano33 IoT and nina fw v1.4.5
+    - ssd1306: Enable reset screen for SSD1306 via I2C
+    - st7789: add scrolling functions to match st7735
+- **bugfixes**
+    - wifinina:
+        - fix getMACAddress and getTime
+        - fix println + cleanup
+        - remove debug flag and remove unnecessary padding call
+        - fix padding and implement missing functions
+    - flash: fix EraseBlocks method which is erasing sectors instead
+- **core**
+    - all: use interfaces for UART objects
+    - all: do not take the pointer of an I2C object
+    - adc: update drivers with ADC to use new config struct
+- **testing**
+    - tester:
+        - add a mock for command-oriented i2c devices
+        - add 16-bit register mock device
+
+- **docs**
+    - ssd1306: example of ssd1306 with 128x64 display over I2C
+    - wifinina:
+        - add information about Adafruit boards with ESP32 wifi coprocessors, and modify examples to remove code that was both not being used, and also prevented many Adafruit boards from being able to be targeted by the examples
+        - update docs to simplify the nina-fw update process
+        - example that connects to AP and prints ip addresses, time and mac
+    - p1am: documentation and example program
+    - add missing new drivers added since last release
+
+0.15.0
+---
+- **new devices**
+    - dht: add DHTXX thermometer
+    - mcp23017: new driver for MCP23017 (I2C port expander)
+    - bmp388: Add bmp388 support (#219)
+- **enhancements**
+    - hd44780: add a mode to work with boards where the RW pin is grounded
+    - st7789: add scrolling functions to match st7735
+    - microbitmatrix: matrix now working on microbit v2
+    - ds1307: Better interface "ReadTime" instead of "Time"
+    - ws2812: make AVR support more robust
+- **bugfixes**
+    - all: fix main package in examples
+- **core**
+    - adc: update all drivers with ADC to use new config struct
+    - spi: remove machine.SPI and replace with drivers.SPI interface for almost all SPI drivers
+- **testing**
+    - test: run unit tests against i2c drivers and any spi drivers without direct gpio
+- **docs**
+    - st7789: correct errors on various godoc comments
+
 0.14.0
 ---
 - **new devices**

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2018-2020 The TinyGo Authors. All rights reserved.
+Copyright (c) 2018-2022 The TinyGo Authors. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are

Makefile

@@ -2,7 +2,7 @@
 clean:
 	@rm -rf build
 
-FMT_PATHS = ./*.go ./examples/**/*.go
+FMT_PATHS = ./
 
 fmt-check:
 	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1
@@ -17,6 +17,8 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/apds9960/proximity/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/itsybitsy-m0/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/at24cx/main.go
@@ -31,6 +33,8 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmp280/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bmp388/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/sram/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/time/main.go
@@ -49,6 +53,8 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/flash/console/qspi
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/gc9a01/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/i2c/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/uart/main.go
@@ -61,6 +67,8 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/hd44780i2c/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/hts221/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hub75/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic
@@ -73,30 +81,50 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/scroll
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/slideshow
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/lps22hb/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/lsm303agr/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/lsm6ds3/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mag3110/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017-multiple/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp3008/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp2515/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/microbitmatrix/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=microbit-v2 ./examples/microbitmatrix/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mma8653/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mpu6050/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=p1am-100 ./examples/p1am/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=pico ./examples/pca9685/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setbuffer/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setpixel/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=arduino ./examples/servo
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/shifter/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht3x/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/shtc3/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/i2c_128x32/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/spi_128x64/main.go
@@ -109,12 +137,18 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/thermistor/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=circuitplay-bluefruit ./examples/tone
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/tm1637/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/fourwire/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/pyportal_touchpaint/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl53l1x/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl6180x/main.go
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13/main.go
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13x/main.go
@@ -131,7 +165,13 @@ smoke-test:
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/ws2812
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.bin -target=m5stamp-c3          ./examples/ws2812
+	@md5sum ./build/test.bin
+	tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/is31fl3731/main.go
+	@md5sum ./build/test.hex
 ifneq ($(AVR), 0)
+	tinygo build -size short -o ./build/test.hex -target=arduino   ./examples/ws2812
+	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=digispark ./examples/ws2812
 	@md5sum ./build/test.hex
 endif
@@ -157,5 +197,72 @@ endif
 	@md5sum ./build/test.hex
 	tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis2mdl/main.go
 	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/max72xx/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/dht/main.go
+	@md5sum ./build/test.hex
+	# tinygo build -size short -o ./build/test.hex -target=arduino ./examples/keypad4x4/main.go
+	# @md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/alarm/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/clkout/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/time/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/timer/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=pico ./examples/qmi8658c/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/ina260/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=nucleo-l432kc ./examples/aht20/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/sdcard/console/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/sdcard/tinyfs/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/webclient/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/webserver/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=wioterminal ./examples/rtl8720dn/mqttsub/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/i2csoft/adt7410/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.elf -target=wioterminal ./examples/axp192/m5stack-core2-blinky/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/xpt2046/main.go
+	@md5sum ./build/test.uf2
+	tinygo build -size short -o ./build/test.elf -target=m5stack-core2 ./examples/ft6336/basic/
+	@md5sum ./build/test.elf
+	tinygo build -size short -o ./build/test.elf -target=m5stack-core2 ./examples/ft6336/touchpaint/
+	@md5sum ./build/test.elf
+	tinygo build -size short -o ./build/test.hex -target=nucleo-wl55jc ./examples/sx126x/lora_rxtx/
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/ssd1289/main.go
+	@md5sum ./build/test.uf2
+	tinygo build -size short -o ./build/test.hex -target=pico ./examples/irremote/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.hex -target=badger2040 ./examples/uc8151/main.go
+	@md5sum ./build/test.hex
+	tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/scd4x/main.go
+	@md5sum ./build/test.uf2
+	tinygo build -size short -o ./build/test.uf2 -target=circuitplay-express ./examples/makeybutton/main.go
+	@md5sum ./build/test.uf2
+	tinygo build -size short -o ./build/test.hex -target=nucleo-wl55jc ./examples/lora/lorawan/atcmd/
+	@md5sum ./build/test.hex
 
-test: clean fmt-check smoke-test
+
+# rwildcard is a recursive version of $(wildcard) 
+# https://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html
+rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))
+# Recursively find all *_test.go files from cwd & reduce to unique dir names
+HAS_TESTS = $(sort $(dir $(call rwildcard,,*_test.go)))
+# Exclude anything we explicitly don't want to test for whatever reason
+EXCLUDE_TESTS = image
+TESTS = $(filter-out $(addsuffix /%,$(EXCLUDE_TESTS)),$(HAS_TESTS))
+
+unit-test:
+	@go test -v $(addprefix ./,$(TESTS))
+
+test: clean fmt-check unit-test smoke-test

README.md

@@ -1,9 +1,9 @@
 # TinyGo Drivers
 
-[![PkgGoDev](https://pkg.go.dev/badge/tinygo.org/x/drivers)](https://pkg.go.dev/tinygo.org/x/drivers) [![CircleCI](https://circleci.com/gh/tinygo-org/drivers/tree/dev.svg?style=svg)](https://circleci.com/gh/tinygo-org/drivers/tree/dev)
+[![PkgGoDev](https://pkg.go.dev/badge/tinygo.org/x/drivers)](https://pkg.go.dev/tinygo.org/x/drivers) [![Build](https://github.com/tinygo-org/drivers/actions/workflows/build.yml/badge.svg?branch=dev)](https://github.com/tinygo-org/drivers/actions/workflows/build.yml)
 
 
-This package provides a collection of hardware drivers for devices that can be used together with [TinyGo](https://tinygo.org).
+This package provides a collection of hardware drivers for devices such as sensors and displays that can be used together with [TinyGo](https://tinygo.org).
 
 ## Installing
 
@@ -52,63 +52,102 @@ func main() {
 
 ## Currently supported devices
 
-The following 53 devices are supported.
+The following 91 devices are supported.
 
-| Device Name | Interface Type |
-|----------|-------------|
-| [ADT7410 I2C Temperature Sensor](https://www.analog.com/media/en/technical-documentation/data-sheets/ADT7410.pdf) | I2C |
-| [ADXL345 accelerometer](http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf) | I2C |
-| [AMG88xx 8x8 Thermal camera sensor](https://cdn-learn.adafruit.com/assets/assets/000/043/261/original/Grid-EYE_SPECIFICATIONS%28Reference%29.pdf) | I2C |
-| [APA102 RGB LED](https://cdn-shop.adafruit.com/product-files/2343/APA102C.pdf) | SPI |
-| [AT24CX 2-wire serial EEPROM](https://www.openimpulse.com/blog/wp-content/uploads/wpsc/downloadables/24C32-Datasheet.pdf) | I2C |
-| [BBC micro:bit LED matrix](https://github.com/bbcmicrobit/hardware/blob/master/SCH_BBC-Microbit_V1.3B.pdf) | GPIO |
-| [BH1750 ambient light sensor](https://www.mouser.com/ds/2/348/bh1750fvi-e-186247.pdf) | I2C |
-| [BlinkM RGB LED](http://thingm.com/fileadmin/thingm/downloads/BlinkM_datasheet.pdf) | I2C |
-| [BME280 humidity/pressure sensor](https://cdn-shop.adafruit.com/datasheets/BST-BME280_DS001-10.pdf) | I2C |
-| [BMI160 accelerometer/gyroscope](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi160-ds000.pdf) | SPI |
-| [BMP180 barometer](https://cdn-shop.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf) | I2C |
-| [BMP280 temperature/barometer](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf) | I2C |
-| [Buzzer](https://en.wikipedia.org/wiki/Buzzer#Piezoelectric) | GPIO |
-| [DS1307 real time clock](https://datasheets.maximintegrated.com/en/ds/DS1307.pdf) | I2C |
-| [DS3231 real time clock](https://datasheets.maximintegrated.com/en/ds/DS3231.pdf) | I2C |
-| [ESP32 as WiFi Coprocessor with Arduino nina-fw](https://github.com/arduino/nina-fw) | SPI |
-| [ESP8266/ESP32 AT Command set for WiFi/TCP/UDP](https://github.com/espressif/esp32-at) | UART |
-| [GPS module](https://www.u-blox.com/en/product/neo-6-series) | I2C/UART |
-| [HC-SR04 Ultrasonic distance sensor](https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf) | GPIO |
-| [HD44780 LCD controller](https://www.sparkfun.com/datasheets/LCD/HD44780.pdf) | GPIO/I2C |
-| [HUB75 RGB led matrix](https://cdn-learn.adafruit.com/downloads/pdf/32x16-32x32-rgb-led-matrix.pdf) | SPI |
-| [ILI9341 TFT color display](https://cdn-shop.adafruit.com/datasheets/ILI9341.pdf) | SPI |
-| [L293x motor driver](https://www.ti.com/lit/ds/symlink/l293d.pdf) | GPIO/PWM |
-| [L9110x motor driver](https://www.elecrow.com/download/datasheet-l9110.pdf) | GPIO/PWM |
-| [LIS2MDL magnetometer](https://www.st.com/resource/en/datasheet/lis2mdl.pdf) | I2C |
-| [LIS3DH accelerometer](https://www.st.com/resource/en/datasheet/lis3dh.pdf) | I2C |
-| [LSM6DS3 accelerometer](https://www.st.com/resource/en/datasheet/lsm6ds3.pdf) | I2C |
-| [MAG3110 magnetometer](https://www.nxp.com/docs/en/data-sheet/MAG3110.pdf) | I2C |
-| [MCP3008 analog to digital converter (ADC)](http://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf) | SPI |
-| [Microphone - PDM](https://cdn-learn.adafruit.com/assets/assets/000/049/977/original/MP34DT01-M.pdf) | I2S/PDM |
-| [MMA8653 accelerometer](https://www.nxp.com/docs/en/data-sheet/MMA8653FC.pdf) | I2C |
-| [MPU6050 accelerometer/gyroscope](https://store.invensense.com/datasheets/invensense/MPU-6050_DataSheet_V3%204.pdf) | I2C |
-| [PCD8544 display](http://eia.udg.edu/~forest/PCD8544_1.pdf) | SPI |
-| [Resistive Touchscreen (4-wire)](http://ww1.microchip.com/downloads/en/Appnotes/doc8091.pdf) | GPIO |
-| [Semihosting](https://wiki.segger.com/Semihosting) | Debug |
-| [Shift register (PISO)](https://en.wikipedia.org/wiki/Shift_register#Parallel-in_serial-out_\(PISO\)) | GPIO |
-| [Shift registers (SIPO)](https://en.wikipedia.org/wiki/Shift_register#Serial-in_parallel-out_(SIPO)) | GPIO |
-| [SHT3x Digital Humidity Sensor](https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/0_Datasheets/Humidity/Sensirion_Humidity_Sensors_SHT3x_Datasheet_digital.pdf) | I2C |
-| [SPI NOR Flash Memory](https://en.wikipedia.org/wiki/Flash_memory#NOR_flash) | SPI/QSPI |
-| [SSD1306 OLED display](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf) | I2C / SPI |
-| [SSD1331 TFT color display](https://www.crystalfontz.com/controllers/SolomonSystech/SSD1331/381/) | SPI |
-| [SSD1351 OLED display](https://download.mikroe.com/documents/datasheets/ssd1351-revision-1.3.pdf) | SPI |
-| [ST7735 TFT color display](https://www.crystalfontz.com/controllers/Sitronix/ST7735R/319/) | SPI |
-| [ST7789 TFT color display](https://cdn-shop.adafruit.com/product-files/3787/3787_tft_QT154H2201__________20190228182902.pdf) | SPI |
-| [Stepper motor "Easystepper" controller](https://en.wikipedia.org/wiki/Stepper_motor) | GPIO |
-| [Thermistor](https://www.farnell.com/datasheets/33552.pdf) | ADC |
-| [TMP102 I2C Temperature Sensor](https://download.mikroe.com/documents/datasheets/tmp102-data-sheet.pdf) | I2C |
-| [VEML6070 UV light sensor](https://www.vishay.com/docs/84277/veml6070.pdf) | I2C |
-| [VL53L1X time-of-flight distance sensor](https://www.st.com/resource/en/datasheet/vl53l1x.pdf) | I2C |
-| [Waveshare 2.13" (B & C) e-paper display](https://www.waveshare.com/w/upload/d/d3/2.13inch-e-paper-b-Specification.pdf) | SPI |
-| [Waveshare 2.13" e-paper display](https://www.waveshare.com/w/upload/e/e6/2.13inch_e-Paper_Datasheet.pdf) | SPI |
-| [Waveshare 4.2" e-paper B/W display](https://www.waveshare.com/w/upload/6/6a/4.2inch-e-paper-specification.pdf) | SPI |
-| [WS2812 RGB LED](https://cdn-shop.adafruit.com/datasheets/WS2812.pdf) | GPIO |
+| Device Name                                                                                                                                                                                         | Interface Type |
+|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------|
+| [ADT7410 I2C Temperature Sensor](https://www.analog.com/media/en/technical-documentation/data-sheets/ADT7410.pdf)                                                                                   | I2C |
+| [ADXL345 accelerometer](http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf)                                                                                             | I2C |
+| [AHT20 I2C Temperature and Humidity Sensor](http://www.aosong.com/userfiles/files/media/AHT20%20%E8%8B%B1%E6%96%87%E7%89%88%E8%AF%B4%E6%98%8E%E4%B9%A6%20A0%2020201222.pdf)                         | I2C |
+| [AMG88xx 8x8 Thermal camera sensor](https://cdn-learn.adafruit.com/assets/assets/000/043/261/original/Grid-EYE_SPECIFICATIONS%28Reference%29.pdf)                                                   | I2C |
+| [APA102 RGB LED](https://cdn-shop.adafruit.com/product-files/2343/APA102C.pdf)                                                                                                                      | SPI |
+| [APDS9960 Digital proximity, ambient light, RGB and gesture sensor](https://cdn.sparkfun.com/assets/learn_tutorials/3/2/1/Avago-APDS-9960-datasheet.pdf)                                            | I2C |
+| [AT24CX 2-wire serial EEPROM](https://www.openimpulse.com/blog/wp-content/uploads/wpsc/downloadables/24C32-Datasheet.pdf)                                                                           | I2C |
+| [ATECCx08 cryptographic processor](https://datasheet.octopart.com/ATSAMA5D27-WLSOM1-Microchip-datasheet-149595509.pdf)                                                                           | I2C |
+| [AXP192 single Cell Li-Battery and Power System Management](https://github.com/m5stack/M5-Schematic/blob/master/Core/AXP192%20Datasheet_v1.1_en_draft_2211.pdf)                                     | I2C |
+| [BBC micro:bit LED matrix](https://github.com/bbcmicrobit/hardware/blob/master/SCH_BBC-Microbit_V1.3B.pdf)                                                                                          | GPIO |
+| [BH1750 ambient light sensor](https://www.mouser.com/ds/2/348/bh1750fvi-e-186247.pdf)                                                                                                               | I2C |
+| [BlinkM RGB LED](http://thingm.com/fileadmin/thingm/downloads/BlinkM_datasheet.pdf)                                                                                                                 | I2C |
+| [BME280 humidity/pressure sensor](https://cdn-shop.adafruit.com/datasheets/BST-BME280_DS001-10.pdf)                                                                                                 | I2C |
+| [BMI160 accelerometer/gyroscope](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi160-ds000.pdf)                                                                    | SPI |
+| [BMP180 barometer](https://cdn-shop.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf)                                                                                                                | I2C |
+| [BMP280 temperature/barometer](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf)                                                                      | I2C |
+| [BMP388 pressure sensor](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp388-ds001.pdf)                                                                            | I2C |
+| [Buzzer](https://en.wikipedia.org/wiki/Buzzer#Piezoelectric)                                                                                                                                        | GPIO |
+| [DHTXX thermometer and humidity sensor](https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf)                                                                | GPIO |
+| [DS1307 real time clock](https://datasheets.maximintegrated.com/en/ds/DS1307.pdf)                                                                                                                   | I2C |
+| [DS3231 real time clock](https://datasheets.maximintegrated.com/en/ds/DS3231.pdf)                                                                                                                   | I2C |
+| [ESP32 as WiFi Coprocessor with Arduino nina-fw](https://github.com/arduino/nina-fw)                                                                                                                | SPI |
+| [ESP8266/ESP32 AT Command set for WiFi/TCP/UDP](https://github.com/espressif/esp32-at)                                                                                                              | UART |
+| [FT6336 touch controller](https://focuslcds.com/content/FT6236.pdf)                                                                                                                                 | I2C |
+| [GPS module](https://www.u-blox.com/en/product/neo-6-series)                                                                                                                                        | I2C/UART |
+| [HC-SR04 Ultrasonic distance sensor](https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf)                                                                                              | GPIO |
+| [HD44780 LCD controller](https://www.sparkfun.com/datasheets/LCD/HD44780.pdf)                                                                                                                       | GPIO/I2C |
+| [HTS221 digital humidity and temperature sensor](https://www.st.com/resource/en/datasheet/hts221.pdf)                                                                                               | I2C |
+| [HUB75 RGB led matrix](https://cdn-learn.adafruit.com/downloads/pdf/32x16-32x32-rgb-led-matrix.pdf)                                                                                                 | SPI |
+| [software I2C driver](https://www.ti.com/lit/an/slva704/slva704.pdf)                                                                                                                                | GPIO |
+| [ILI9341 TFT color display](https://cdn-shop.adafruit.com/datasheets/ILI9341.pdf)                                                                                                                   | SPI |
+| [INA260 Volt/Amp/Power meter](https://www.ti.com/lit/ds/symlink/ina260.pdf)                                                                                                                         | I2C |
+| [Infrared remote control](https://en.wikipedia.org/wiki/Consumer_IR)                                                                                                                                | GPIO |
+| [IS31FL3731 matrix LED driver](https://www.lumissil.com/assets/pdf/core/IS31FL3731_DS.pdf)                                                                                                          | I2C |
+| [4x4 Membrane Keypad](https://cdn.sparkfun.com/assets/f/f/a/5/0/DS-16038.pdf)                                                                                                                       | GPIO |
+| [L293x motor driver](https://www.ti.com/lit/ds/symlink/l293d.pdf)                                                                                                                                   | GPIO/PWM |
+| [L9110x motor driver](https://www.elecrow.com/download/datasheet-l9110.pdf)                                                                                                                         | GPIO/PWM |
+| [LIS2MDL magnetometer](https://www.st.com/resource/en/datasheet/lis2mdl.pdf)                                                                                                                        | I2C |
+| [LIS3DH accelerometer](https://www.st.com/resource/en/datasheet/lis3dh.pdf)                                                                                                                         | I2C |
+| [LPS22HB MEMS nano pressure sensor](https://www.st.com/resource/en/datasheet/dm00140895.pdf)                                                                                                        | I2C |
+| [LSM6DS3 accelerometer](https://www.st.com/resource/en/datasheet/lsm6ds3.pdf)                                                                                                                       | I2C |
+| [LSM6DSOX accelerometer](https://www.st.com/resource/en/datasheet/lsm6dsox.pdf)                                                                                                                     | I2C |
+| [LSM6DS3TR accelerometer](https://www.st.com/resource/en/datasheet/lsm6ds3tr.pdf)                                                                                                                   | I2C |
+| [LSM303AGR accelerometer](https://www.st.com/resource/en/datasheet/lsm303agr.pdf)                                                                                                                   | I2C |
+| [LSM9DS1 accelerometer](https://www.st.com/resource/en/datasheet/lsm9ds1.pdf)                                                                                                                       | I2C |
+| [Makey Button](https://makeymakey.com/)                                                                                                                                                             | GPIO |
+| [MAG3110 magnetometer](https://www.nxp.com/docs/en/data-sheet/MAG3110.pdf)                                                                                                                          | I2C |
+| [MAX7219 & MAX7221 display driver](https://datasheets.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf)                                                                                                | SPI |
+| [MCP2515 Stand-Alone CAN Controller with SPI Interface](https://ww1.microchip.com/downloads/en/DeviceDoc/MCP2515-Family-Data-Sheet-DS20001801K.pdf)                                                 | SPI |
+| [MCP3008 analog to digital converter (ADC)](http://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf)                                                                                             | SPI |
+| [MCP23017 port expander](https://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf)                                                                                                            | I2C |
+| [Microphone - PDM](https://cdn-learn.adafruit.com/assets/assets/000/049/977/original/MP34DT01-M.pdf)                                                                                                | I2S/PDM |
+| [MMA8653 accelerometer](https://www.nxp.com/docs/en/data-sheet/MMA8653FC.pdf)                                                                                                                       | I2C |
+| [MPU6050 accelerometer/gyroscope](https://store.invensense.com/datasheets/invensense/MPU-6050_DataSheet_V3%204.pdf)                                                                                 | I2C |
+| [P1AM-100 Base Controller](https://facts-engineering.github.io/modules/P1AM-100/P1AM-100.html)                                                                                                      | SPI |
+| [PCD8544 display](http://eia.udg.edu/~forest/PCD8544_1.pdf)                                                                                                                                         | SPI |
+| [PCF8563 real time clock](https://www.nxp.com/docs/en/data-sheet/PCF8563.pdf)                                                                                                                       | I2C |
+| [QMI8658C accelerometer/gyroscope](https://www.qstcorp.com/upload/pdf/202202/%EF%BC%88%E5%B7%B2%E4%BC%A0%EF%BC%89QMI8658C%20datasheet%20rev%200.9.pdf)                                              | I2C |
+| [Resistive Touchscreen (4-wire)](http://ww1.microchip.com/downloads/en/Appnotes/doc8091.pdf)                                                                                                        | GPIO |
+| [RTL8720DN 2.4G/5G Dual Bands Wireless and BLE5.0](https://www.seeedstudio.com/Realtek8720DN-2-4G-5G-Dual-Bands-Wireless-and-BLE5-0-Combo-Module-p-4442.html)                                       | UART |
+| [SCD4x CO2 Sensor](https://sensirion.com/media/documents/C4B87CE6/627C2DCD/CD_DS_SCD40_SCD41_Datasheet_D1.pdf)                                                                                      | I2C |
+| [Semihosting](https://wiki.segger.com/Semihosting)                                                                                                                                                  | Debug |
+| [Servo](https://learn.sparkfun.com/tutorials/hobby-servo-tutorial/all)                                                                                                                              | PWM |
+| [Shift register (PISO)](https://en.wikipedia.org/wiki/Shift_register#Parallel-in_serial-out_\(PISO\))                                                                                               | GPIO |
+| [Shift registers (SIPO)](https://en.wikipedia.org/wiki/Shift_register#Serial-in_parallel-out_(SIPO))                                                                                                | GPIO |
+| [SH1106 OLED display](https://www.velleman.eu/downloads/29/infosheets/sh1106_datasheet.pdf) | I2C / SPI |
+| [SHT3x Digital Humidity Sensor](https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT3x_Datasheet_digital.pdf) | I2C |
+| [SHTC3 Digital Humidity Sensor (RH/T)](https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHTC3_Datasheet.pdf)  | I2C |
+| [SPI NOR Flash Memory](https://en.wikipedia.org/wiki/Flash_memory#NOR_flash)                                                                                                                        | SPI/QSPI |
+| [SPI SDCARD/MMC](https://en.wikipedia.org/wiki/SD_card)                                                                                                                                             | SPI |
+| [SSD1306 OLED display](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf)                                                                                                                        | I2C / SPI |
+| [SSD1331 TFT color display](https://www.crystalfontz.com/controllers/SolomonSystech/SSD1331/381/)                                                                                                   | SPI |
+| [SSD1351 OLED display](https://download.mikroe.com/documents/datasheets/ssd1351-revision-1.3.pdf)                                                                                                   | SPI |
+| [ST7735 TFT color display](https://www.crystalfontz.com/controllers/Sitronix/ST7735R/319/)                                                                                                          | SPI |
+| [ST7789 TFT color display](https://cdn-shop.adafruit.com/product-files/3787/3787_tft_QT154H2201__________20190228182902.pdf)                                                                        | SPI |
+| [Stepper motor "Easystepper" controller](https://en.wikipedia.org/wiki/Stepper_motor)                                                                                                               | GPIO |
+| [Thermistor](https://www.farnell.com/datasheets/33552.pdf)                                                                                                                                          | ADC |
+| [TM1637 7-segment LED display](https://www.mcielectronics.cl/website_MCI/static/documents/Datasheet_TM1637.pdf)                                                                                     | I2C |
+| [TMP102 I2C Temperature Sensor](https://download.mikroe.com/documents/datasheets/tmp102-data-sheet.pdf)                                                                                             | I2C |
+| [UC8151 All-in-one driver IC for ESL](https://www.buydisplay.com/download/ic/UC8151C.pdf)                                                                                                           | I2C |
+| [VEML6070 UV light sensor](https://www.vishay.com/docs/84277/veml6070.pdf)                                                                                                                          | I2C |
+| [VL53L1X time-of-flight distance sensor](https://www.st.com/resource/en/datasheet/vl53l1x.pdf)                                                                                                      | I2C |
+| [VL6180X time-of-flight distance sensor](https://www.st.com/resource/en/datasheet/vl6180x.pdf)                                                                                                      | I2C |
+| [Waveshare 2.13" (B & C) e-paper display](https://www.waveshare.com/w/upload/d/d3/2.13inch-e-paper-b-Specification.pdf)                                                                             | SPI |
+| [Waveshare 2.13" e-paper display](https://www.waveshare.com/w/upload/e/e6/2.13inch_e-Paper_Datasheet.pdf)                                                                                           | SPI |
+| [Waveshare 2.9" e-paper display (V1)](https://www.waveshare.com/w/upload/e/e6/2.9inch_e-Paper_Datasheet.pdf)                                                                                        | SPI |
+| [Waveshare 4.2" e-paper B/W display](https://www.waveshare.com/w/upload/6/6a/4.2inch-e-paper-specification.pdf)                                                                                     | SPI |
+| [Waveshare GC9A01 TFT round display](https://www.waveshare.com/w/upload/5/5e/GC9A01A.pdf)                                                                                                           | SPI |
+| [WS2812 RGB LED](https://cdn-shop.adafruit.com/datasheets/WS2812.pdf)                                                                                                                               | GPIO |
+| [XPT2046 touch controller](http://grobotronics.com/images/datasheets/xpt2046-datasheet.pdf)                                                                                                         | GPIO |
+| [Semtech SX126x Lora](https://www.semtech.com/products/wireless-rf/lora-connect/sx1261)                                                                                                             | SPI |
+| [SSD1289 TFT color display](http://aitendo3.sakura.ne.jp/aitendo_data/product_img/lcd/tft2/M032C1289TP/3.2-SSD1289.pdf)                                                                             | GPIO |
 
 ## Contributing
 

adt7410/adt7410.go

@@ -1,7 +1,6 @@
 // Package adt7410 provides a driver for the adt7410 I2C Temperature Sensor.
 //
 // Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADT7410.pdf
-//
 package adt7410 // import "tinygo.org/x/drivers/adt7410"
 
 import (

adt7410/adt7410_test.go

@@ -18,13 +18,13 @@ func TestWhoAmI(t *testing.T) {
 	c := qt.New(t)
 	bus := tester.NewI2CBus(c)
 	fake := tester.NewI2CDevice(c, Address)
-	fake.SetupRegisters(defaultRegisters())
+	copy(fake.Registers[:], defaultRegisters())
 	bus.AddDevice(fake)
 
 	dev := New(bus)
 	c.Assert(dev.Connected(), qt.Equals, true)
 
-	fake.SetupRegister(RegID, 0x99)
+	fake.Registers[RegID] = 0x99
 	c.Assert(dev.Connected(), qt.Equals, false)
 }
 

adxl345/adxl345.go

@@ -3,7 +3,6 @@
 // Datasheet EN: http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf
 //
 // Datasheet JP: http://www.analog.com/media/jp/technical-documentation/data-sheets/ADXL345_jp.pdf
-//
 package adxl345 // import "tinygo.org/x/drivers/adxl345"
 
 import "tinygo.org/x/drivers"

aht20/aht20.go

@@ -0,0 +1,108 @@
+package aht20
+
+import (
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+// Device wraps an I2C connection to an AHT20 device.
+type Device struct {
+	bus      drivers.I2C
+	Address  uint16
+	humidity uint32
+	temp     uint32
+}
+
+// New creates a new AHT20 connection. The I2C bus must already be
+// configured.
+//
+// This function only creates the Device object, it does not touch the device.
+func New(bus drivers.I2C) Device {
+	return Device{
+		bus:     bus,
+		Address: Address,
+	}
+}
+
+// Configure the device
+func (d *Device) Configure() {
+	// Check initialization state
+	status := d.Status()
+	if status&0x08 == 1 {
+		// Device is initialized
+		return
+	}
+
+	// Force initialization
+	d.bus.Tx(d.Address, []byte{CMD_INITIALIZE, 0x08, 0x00}, nil)
+	time.Sleep(10 * time.Millisecond)
+}
+
+// Reset the device
+func (d *Device) Reset() {
+	d.bus.Tx(d.Address, []byte{CMD_SOFTRESET}, nil)
+}
+
+// Status of the device
+func (d *Device) Status() byte {
+	data := []byte{0}
+
+	d.bus.Tx(d.Address, []byte{CMD_STATUS}, data)
+
+	return data[0]
+}
+
+// Read the temperature and humidity
+//
+// The actual temperature and humidity are stored
+// and can be accessed using `Temp` and `Humidity`.
+func (d *Device) Read() error {
+	d.bus.Tx(d.Address, []byte{CMD_TRIGGER, 0x33, 0x00}, nil)
+
+	data := []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
+	for retry := 0; retry < 3; retry++ {
+		time.Sleep(80 * time.Millisecond)
+		err := d.bus.Tx(d.Address, nil, data)
+		if err != nil {
+			return err
+		}
+
+		// If measurement complete, store values
+		if data[0]&0x04 != 0 && data[0]&0x80 == 0 {
+			d.humidity = uint32(data[1])<<12 | uint32(data[2])<<4 | uint32(data[3])>>4
+			d.temp = (uint32(data[3])&0xF)<<16 | uint32(data[4])<<8 | uint32(data[5])
+			return nil
+		}
+	}
+
+	return ErrTimeout
+}
+
+func (d *Device) RawHumidity() uint32 {
+	return d.humidity
+}
+
+func (d *Device) RawTemp() uint32 {
+	return d.temp
+}
+
+func (d *Device) RelHumidity() float32 {
+	return (float32(d.humidity) * 100) / 0x100000
+}
+
+func (d *Device) DeciRelHumidity() int32 {
+	return (int32(d.humidity) * 1000) / 0x100000
+}
+
+// Temperature in degrees celsius
+func (d *Device) Celsius() float32 {
+	return (float32(d.temp*200.0) / 0x100000) - 50
+}
+
+// Temperature in mutiples of one tenth of a degree celsius
+//
+// Using this method avoids floating point calculations.
+func (d *Device) DeciCelsius() int32 {
+	return ((int32(d.temp) * 2000) / 0x100000) - 500
+}

aht20/aht20_test.go

@@ -0,0 +1,74 @@
+package aht20
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+	"tinygo.org/x/drivers/tester"
+)
+
+func TestDefaultI2CAddress(t *testing.T) {
+	c := qt.New(t)
+	bus := tester.NewI2CBus(c)
+	dev := New(bus)
+	c.Assert(uint8(dev.Address), qt.Equals, uint8(Address))
+}
+
+func TestInitialization(t *testing.T) {
+	c := qt.New(t)
+	bus := tester.NewI2CBus(c)
+	fdev := tester.NewI2CDeviceCmd(c, Address)
+	fdev.Commands = defaultCommands()
+	bus.AddDevice(fdev)
+
+	// Set status to uninitialized to force initialization
+	fdev.Commands[CMD_STATUS].Response[0] = 0x0C
+
+	dev := New(bus)
+	dev.Configure()
+
+	// Check initialization command invoked
+	c.Assert(fdev.Commands[CMD_INITIALIZE].Invocations > 0, qt.Equals, true)
+}
+
+func TestRead(t *testing.T) {
+	c := qt.New(t)
+	bus := tester.NewI2CBus(c)
+	fdev := tester.NewI2CDeviceCmd(c, Address)
+	fdev.Commands = defaultCommands()
+	bus.AddDevice(fdev)
+
+	dev := New(bus)
+	dev.Read()
+
+	// Should be 25deg (250 decidegrees)
+	c.Assert(dev.DeciCelsius(), qt.Equals, int32(250))
+
+	// Should be 36.3% (363 decipercent)
+	c.Assert(dev.DeciRelHumidity(), qt.Equals, int32(363))
+}
+
+func defaultCommands() map[uint8]*tester.Cmd {
+	return map[uint8]*tester.Cmd{
+		CMD_INITIALIZE: {
+			Command:  []byte{0xBE},
+			Mask:     []byte{0xFF},
+			Response: []byte{},
+		},
+		CMD_TRIGGER: {
+			Command:  []byte{0xAC, 0x33, 0x00},
+			Mask:     []byte{0xFF, 0xFF, 0xFF},
+			Response: []byte{0x1C, 0x5D, 0x10, 0x66, 0x01, 0xD2, 0x93},
+		},
+		CMD_SOFTRESET: {
+			Command:  []byte{0xBA},
+			Mask:     []byte{0xFF},
+			Response: []byte{},
+		},
+		CMD_STATUS: {
+			Command:  []byte{0x71},
+			Mask:     []byte{0xFF},
+			Response: []byte{0x1C},
+		},
+	}
+}

aht20/registers.go

@@ -0,0 +1,20 @@
+package aht20
+
+import "errors"
+
+const (
+	Address = 0x38
+
+	CMD_INITIALIZE = 0xBE
+	CMD_STATUS     = 0x71
+	CMD_TRIGGER    = 0xAC
+	CMD_SOFTRESET  = 0xBA
+
+	STATUS_BUSY       = 0x80
+	STATUS_CALIBRATED = 0x08
+)
+
+var (
+	ErrBusy    = errors.New("device busy")
+	ErrTimeout = errors.New("timeout")
+)

apa102/apa102.go

@@ -6,6 +6,8 @@ package apa102 // import "tinygo.org/x/drivers/apa102"
 import (
 	"image/color"
 	"machine"
+
+	"tinygo.org/x/drivers"
 )
 
 const (
@@ -23,54 +25,48 @@ var startFrame = []byte{0x00, 0x00, 0x00, 0x00}
 
 // Device wraps APA102 SPI LEDs.
 type Device struct {
-	bus   SPI
+	bus   drivers.SPI
 	Order int
-}
-
-// The SPI interface specifies the minimum functionality that a bus
-// implementation needs to provide for use by the APA102 driver.  Hardware
-// SPI from the TinyGo "machine" package implements this already.
-type SPI interface {
-	Tx(w, r []byte) error
-	Transfer(b byte) (byte, error)
+	buf   [4]byte
 }
 
 // New returns a new APA102 driver. Pass in a fully configured SPI bus.
-func New(b SPI) Device {
-	return Device{bus: b, Order: BGR}
+func New(b drivers.SPI) *Device {
+	return &Device{bus: b, Order: BGR}
 }
 
 // NewSoftwareSPI returns a new APA102 driver that will use a software based
 // implementation of the SPI protocol.
-func NewSoftwareSPI(sckPin, sdoPin machine.Pin, delay uint32) Device {
+func NewSoftwareSPI(sckPin, sdoPin machine.Pin, delay uint32) *Device {
 	return New(&bbSPI{SCK: sckPin, SDO: sdoPin, Delay: delay})
 }
 
 // WriteColors writes the given RGBA color slice out using the APA102 protocol.
 // The A value (Alpha channel) is used for brightness, set to 0xff (255) for maximum.
-func (d Device) WriteColors(cs []color.RGBA) (n int, err error) {
+func (d *Device) WriteColors(cs []color.RGBA) (n int, err error) {
 	d.startFrame()
 
 	// write data
 	for _, c := range cs {
 		// brightness is scaled to 5 bit value
-		d.bus.Transfer(0xe0 | (c.A >> 3))
+		d.buf[0] = 0xe0 | (c.A >> 3)
 
 		// set the colors
 		switch d.Order {
 		case BRG:
-			d.bus.Transfer(c.B)
-			d.bus.Transfer(c.R)
-			d.bus.Transfer(c.G)
+			d.buf[1] = c.B
+			d.buf[2] = c.R
+			d.buf[3] = c.G
 		case GRB:
-			d.bus.Transfer(c.G)
-			d.bus.Transfer(c.R)
-			d.bus.Transfer(c.B)
+			d.buf[1] = c.G
+			d.buf[2] = c.R
+			d.buf[3] = c.B
 		case BGR:
-			d.bus.Transfer(c.B)
-			d.bus.Transfer(c.G)
-			d.bus.Transfer(c.R)
+			d.buf[1] = c.B
+			d.buf[2] = c.G
+			d.buf[3] = c.R
 		}
+		d.bus.Tx(d.buf[:], nil)
 	}
 
 	d.endFrame(len(cs))
@@ -79,7 +75,7 @@ func (d Device) WriteColors(cs []color.RGBA) (n int, err error) {
 }
 
 // Write the raw bytes using the APA102 protocol.
-func (d Device) Write(buf []byte) (n int, err error) {
+func (d *Device) Write(buf []byte) (n int, err error) {
 	d.startFrame()
 	d.bus.Tx(buf, nil)
 	d.endFrame(len(buf) / 4)
@@ -88,14 +84,14 @@ func (d Device) Write(buf []byte) (n int, err error) {
 }
 
 // startFrame sends the start bytes for a strand of LEDs.
-func (d Device) startFrame() {
+func (d *Device) startFrame() {
 	d.bus.Tx(startFrame, nil)
 }
 
 // endFrame sends the end frame marker with one extra bit per LED so
 // long strands of LEDs receive the necessary termination for updates.
 // See https://cpldcpu.wordpress.com/2014/11/30/understanding-the-apa102-superled/
-func (d Device) endFrame(count int) {
+func (d *Device) endFrame(count int) {
 	for i := 0; i < count/16; i++ {
 		d.bus.Transfer(0xff)
 	}

apds9960/apds9960.go

@@ -0,0 +1,467 @@
+// Package apds9960 implements a driver for APDS-9960,
+// a digital proximity, ambient light, RGB and gesture sensor.
+//
+// Datasheet: https://cdn.sparkfun.com/assets/learn_tutorials/3/2/1/Avago-APDS-9960-datasheet.pdf
+package apds9960
+
+import (
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+// Device wraps an I2C connection to a APDS-9960 device.
+type Device struct {
+	bus     drivers.I2C
+	Address uint8
+	mode    uint8
+	gesture gestureData
+}
+
+// Configuration for APDS-9960 device.
+type Configuration struct {
+	ProximityPulseLength uint8
+	ProximityPulseCount  uint8
+	GesturePulseLength   uint8
+	GesturePulseCount    uint8
+	ProximityGain        uint8
+	GestureGain          uint8
+	ColorGain            uint8
+	ADCIntegrationCycles uint16
+	LEDBoost             uint16
+	threshold            uint8
+	sensitivity          uint8
+}
+
+// for gesture-related data
+type gestureData struct {
+	detected    uint8
+	threshold   uint8
+	sensitivity uint8
+	gXDelta     int16
+	gYDelta     int16
+	gXPrevDelta int16
+	gYPrevDelta int16
+	received    bool
+}
+
+// for enabling various device function
+type enableConfig struct {
+	GEN  bool
+	PIEN bool
+	AIEN bool
+	WEN  bool
+	PEN  bool
+	AEN  bool
+	PON  bool
+}
+
+// New creates a new APDS-9960 connection. The I2C bus must already be
+// configured.
+//
+// This function only creates the Device object, it does not touch the device.
+func New(bus drivers.I2C) Device {
+	return Device{bus: bus, Address: ADPS9960_ADDRESS, mode: MODE_NONE}
+}
+
+// Connected returns whether APDS-9960 has been found.
+// It does a "who am I" request and checks the response.
+func (d *Device) Connected() bool {
+	data := []byte{0}
+	d.bus.ReadRegister(d.Address, APDS9960_ID_REG, data)
+	return data[0] == 0xAB
+}
+
+// GetMode returns current engine mode
+func (d *Device) GetMode() uint8 {
+	return d.mode
+}
+
+// DisableAll turns off the device and all functions
+func (d *Device) DisableAll() {
+	d.enable(enableConfig{})
+	d.bus.WriteRegister(d.Address, APDS9960_GCONF4_REG, []byte{0x00})
+	d.mode = MODE_NONE
+	d.gesture.detected = GESTURE_NONE
+}
+
+// SetProximityPulse sets proximity pulse length (4, 8, 16, 32) and count (1~64)
+// default: 16, 64
+func (d *Device) SetProximityPulse(length, count uint8) {
+	d.bus.WriteRegister(d.Address, APDS9960_PPULSE_REG, []byte{getPulseLength(length)<<6 | getPulseCount(count)})
+}
+
+// SetGesturePulse sets gesture pulse length (4, 8, 16, 32) and count (1~64)
+// default: 16, 64
+func (d *Device) SetGesturePulse(length, count uint8) {
+	d.bus.WriteRegister(d.Address, APDS9960_GPULSE_REG, []byte{getPulseLength(length)<<6 | getPulseCount(count)})
+}
+
+// SetADCIntegrationCycles sets ALS/color ADC internal integration cycles (1~256, 1 cycle = 2.78 ms)
+// default: 4 (~10 ms)
+func (d *Device) SetADCIntegrationCycles(cycles uint16) {
+	if cycles > 256 {
+		cycles = 256
+	}
+	d.bus.WriteRegister(d.Address, APDS9960_ATIME_REG, []byte{uint8(256 - cycles)})
+}
+
+// SetGains sets proximity/gesture gain (1, 2, 4, 8x) and ALS/color gain (1, 4, 16, 64x)
+// default: 1, 1, 4
+func (d *Device) SetGains(proximityGain, gestureGain, colorGain uint8) {
+	d.bus.WriteRegister(d.Address, APDS9960_CONTROL_REG, []byte{getProximityGain(proximityGain)<<2 | getALSGain(colorGain)})
+	d.bus.WriteRegister(d.Address, APDS9960_GCONF2_REG, []byte{getProximityGain(gestureGain) << 5})
+}
+
+// LEDBoost sets proximity and gesture LED current level (100, 150, 200, 300 (%))
+// default: 100
+func (d *Device) LEDBoost(percent uint16) {
+	var v uint8
+	switch percent {
+	case 100:
+		v = 0
+	case 150:
+		v = 1
+	case 200:
+		v = 2
+	case 300:
+		v = 3
+	}
+	d.bus.WriteRegister(d.Address, APDS9960_CONFIG2_REG, []byte{0x01 | v<<4})
+}
+
+// Setthreshold sets threshold (0~255) for detecting gestures
+// default: 30
+func (d *Device) Setthreshold(t uint8) {
+	d.gesture.threshold = t
+}
+
+// Setsensitivity sets sensivity (0~100) for detecting gestures
+// default: 20
+func (d *Device) Setsensitivity(s uint8) {
+	if s > 100 {
+		s = 100
+	}
+	d.gesture.sensitivity = 100 - s
+}
+
+// EnableProximity starts the proximity engine
+func (d *Device) EnableProximity() {
+	if d.mode != MODE_NONE {
+		d.DisableAll()
+	}
+	d.enable(enableConfig{PON: true, PEN: true, WEN: true})
+	d.mode = MODE_PROXIMITY
+}
+
+// ProximityAvailable reports if proximity data is available
+func (d *Device) ProximityAvailable() bool {
+	if d.mode == MODE_PROXIMITY && d.readStatus("PVALID") {
+		return true
+	}
+	return false
+}
+
+// ReadProximity reads proximity data (0~255)
+func (d *Device) ReadProximity() (proximity int32) {
+	if d.mode != MODE_PROXIMITY {
+		return 0
+	}
+	data := []byte{0}
+	d.bus.ReadRegister(d.Address, APDS9960_PDATA_REG, data)
+	return 255 - int32(data[0])
+}
+
+// EnableColor starts the color engine
+func (d *Device) EnableColor() {
+	if d.mode != MODE_NONE {
+		d.DisableAll()
+	}
+	d.enable(enableConfig{PON: true, AEN: true, WEN: true})
+	d.mode = MODE_COLOR
+}
+
+// ColorAvailable reports if color data is available
+func (d *Device) ColorAvailable() bool {
+	if d.mode == MODE_COLOR && d.readStatus("AVALID") {
+		return true
+	}
+	return false
+}
+
+// ReadColor reads color data (red, green, blue, clear color/brightness)
+func (d *Device) ReadColor() (r int32, g int32, b int32, clear int32) {
+	if d.mode != MODE_COLOR {
+		return
+	}
+	data := []byte{0, 0, 0, 0, 0, 0, 0, 0}
+	d.bus.ReadRegister(d.Address, APDS9960_CDATAL_REG, data[:1])
+	d.bus.ReadRegister(d.Address, APDS9960_CDATAH_REG, data[1:2])
+	d.bus.ReadRegister(d.Address, APDS9960_RDATAL_REG, data[2:3])
+	d.bus.ReadRegister(d.Address, APDS9960_RDATAH_REG, data[3:4])
+	d.bus.ReadRegister(d.Address, APDS9960_GDATAL_REG, data[4:5])
+	d.bus.ReadRegister(d.Address, APDS9960_GDATAH_REG, data[5:6])
+	d.bus.ReadRegister(d.Address, APDS9960_BDATAL_REG, data[6:7])
+	d.bus.ReadRegister(d.Address, APDS9960_BDATAH_REG, data[7:])
+	clear = int32(uint16(data[1])<<8 | uint16(data[0]))
+	r = int32(uint16(data[3])<<8 | uint16(data[2]))
+	g = int32(uint16(data[5])<<8 | uint16(data[4]))
+	b = int32(uint16(data[7])<<8 | uint16(data[6]))
+	return
+}
+
+// EnableGesture starts the gesture engine
+func (d *Device) EnableGesture() {
+	if d.mode != MODE_NONE {
+		d.DisableAll()
+	}
+	d.enable(enableConfig{PON: true, PEN: true, GEN: true, WEN: true})
+	d.mode = MODE_GESTURE
+	d.gesture.detected = GESTURE_NONE
+	d.gesture.gXDelta = 0
+	d.gesture.gYDelta = 0
+	d.gesture.gXPrevDelta = 0
+	d.gesture.gYPrevDelta = 0
+	d.gesture.received = false
+}
+
+// GestureAvailable reports if gesture data is available
+func (d *Device) GestureAvailable() bool {
+	if d.mode != MODE_GESTURE {
+		return false
+	}
+
+	data := []byte{0, 0, 0, 0}
+
+	// check GVALID
+	d.bus.ReadRegister(d.Address, APDS9960_GSTATUS_REG, data[:1])
+	if data[0]&0x01 == 0 {
+		return false
+	}
+
+	// get number of data sets available in FIFO
+	d.bus.ReadRegister(d.Address, APDS9960_GFLVL_REG, data[:1])
+	availableDataSets := data[0]
+	if availableDataSets == 0 {
+		return false
+	}
+
+	// read up, down, left and right proximity data from FIFO
+	var dataSets [32][4]uint8
+	for i := uint8(0); i < availableDataSets; i++ {
+		d.bus.ReadRegister(d.Address, APDS9960_GFIFO_U_REG, data[:1])
+		d.bus.ReadRegister(d.Address, APDS9960_GFIFO_D_REG, data[1:2])
+		d.bus.ReadRegister(d.Address, APDS9960_GFIFO_L_REG, data[2:3])
+		d.bus.ReadRegister(d.Address, APDS9960_GFIFO_R_REG, data[3:4])
+		for j := uint8(0); j < 4; j++ {
+			dataSets[i][j] = data[j]
+		}
+	}
+
+	// gesture detection process
+	d.gesture.detected = GESTURE_NONE
+	for i := uint8(0); i < availableDataSets; i++ {
+		U := dataSets[i][0]
+		D := dataSets[i][1]
+		L := dataSets[i][2]
+		R := dataSets[i][3]
+
+		// if all readings fall below threshold, it's possible that
+		// a movement's just been made
+		if U < d.gesture.threshold && D < d.gesture.threshold && L < d.gesture.threshold && R < d.gesture.threshold {
+			d.gesture.received = true
+			// if there were movement in the previous step (including the last data sets)
+			if d.gesture.gXPrevDelta != 0 && d.gesture.gYPrevDelta != 0 {
+				totalX := d.gesture.gXPrevDelta - d.gesture.gXDelta
+				totalY := d.gesture.gYPrevDelta - d.gesture.gYDelta
+				// if previous and current movement are in opposite directions (pass through one led then next)
+				// and the difference is big enough, the gesture is recorded
+				switch {
+				case totalX < -int16(d.gesture.sensitivity):
+					d.gesture.detected = GESTURE_LEFT
+				case totalX > int16(d.gesture.sensitivity):
+					d.gesture.detected = GESTURE_RIGHT
+				case totalY > int16(d.gesture.sensitivity):
+					d.gesture.detected = GESTURE_DOWN
+				case totalY < -int16(d.gesture.sensitivity):
+					d.gesture.detected = GESTURE_UP
+				}
+				d.gesture.gXDelta = 0
+				d.gesture.gYDelta = 0
+				d.gesture.gXPrevDelta = 0
+				d.gesture.gYPrevDelta = 0
+			}
+			continue
+		}
+
+		// recording current movement
+		d.gesture.gXDelta = int16(R) - int16(L)
+		d.gesture.gYDelta = int16(D) - int16(U)
+		if d.gesture.received {
+			d.gesture.received = false
+			d.gesture.gXPrevDelta = d.gesture.gXDelta
+			d.gesture.gYPrevDelta = d.gesture.gYDelta
+		}
+	}
+
+	return d.gesture.detected != GESTURE_NONE
+}
+
+// ReadGesture reads last gesture data
+func (d *Device) ReadGesture() (gesture int32) {
+	return int32(d.gesture.detected)
+}
+
+// private functions
+
+func (d *Device) configureDevice(cfg Configuration) {
+	d.DisableAll() // turn off everything
+
+	// "default" settings
+	if cfg.ProximityPulseLength == 0 {
+		cfg.ProximityPulseLength = 16
+	}
+	if cfg.ProximityPulseCount == 0 {
+		cfg.ProximityPulseCount = 64
+	}
+	if cfg.GesturePulseLength == 0 {
+		cfg.GesturePulseLength = 16
+	}
+	if cfg.GesturePulseCount == 0 {
+		cfg.GesturePulseCount = 64
+	}
+	if cfg.ProximityGain == 0 {
+		cfg.ProximityGain = 1
+	}
+	if cfg.GestureGain == 0 {
+		cfg.GestureGain = 1
+	}
+	if cfg.ColorGain == 0 {
+		cfg.ColorGain = 4
+	}
+	if cfg.ADCIntegrationCycles == 0 {
+		cfg.ADCIntegrationCycles = 4
+	}
+	if cfg.threshold == 0 {
+		d.gesture.threshold = 30
+	}
+	if cfg.sensitivity == 0 {
+		d.gesture.sensitivity = 20
+	}
+
+	d.SetProximityPulse(cfg.ProximityPulseLength, cfg.ProximityPulseCount)
+	d.SetGesturePulse(cfg.GesturePulseLength, cfg.GesturePulseCount)
+	d.SetGains(cfg.ProximityGain, cfg.GestureGain, cfg.ColorGain)
+	d.SetADCIntegrationCycles(cfg.ADCIntegrationCycles)
+
+	if cfg.LEDBoost > 0 {
+		d.LEDBoost(cfg.LEDBoost)
+	}
+}
+
+func (d *Device) enable(cfg enableConfig) {
+	var gen, pien, aien, wen, pen, aen, pon uint8
+
+	if cfg.GEN {
+		gen = 1
+	}
+	if cfg.PIEN {
+		pien = 1
+	}
+	if cfg.AIEN {
+		aien = 1
+	}
+	if cfg.WEN {
+		wen = 1
+	}
+	if cfg.PEN {
+		pen = 1
+	}
+	if cfg.AEN {
+		aen = 1
+	}
+	if cfg.PON {
+		pon = 1
+	}
+
+	data := []byte{gen<<6 | pien<<5 | aien<<4 | wen<<3 | pen<<2 | aen<<1 | pon}
+	d.bus.WriteRegister(d.Address, APDS9960_ENABLE_REG, data)
+
+	if cfg.PON {
+		time.Sleep(time.Millisecond * 10)
+	}
+}
+
+func (d *Device) readStatus(param string) bool {
+	data := []byte{0}
+	d.bus.ReadRegister(d.Address, APDS9960_STATUS_REG, data)
+
+	switch param {
+	case "CPSAT":
+		return data[0]>>7&0x01 == 1
+	case "PGSAT":
+		return data[0]>>6&0x01 == 1
+	case "PINT":
+		return data[0]>>5&0x01 == 1
+	case "AINT":
+		return data[0]>>4&0x01 == 1
+	case "PVALID":
+		return data[0]>>1&0x01 == 1
+	case "AVALID":
+		return data[0]&0x01 == 1
+	default:
+		return false
+	}
+}
+
+func getPulseLength(l uint8) uint8 {
+	switch l {
+	case 4:
+		return 0
+	case 8:
+		return 1
+	case 16:
+		return 2
+	case 32:
+		return 3
+	default:
+		return 0
+	}
+}
+
+func getPulseCount(c uint8) uint8 {
+	if c < 1 && c > 64 {
+		return 0
+	}
+	return c - 1
+}
+
+func getProximityGain(g uint8) uint8 {
+	switch g {
+	case 1:
+		return 0
+	case 2:
+		return 1
+	case 4:
+		return 2
+	case 8:
+		return 3
+	default:
+		return 0
+	}
+}
+
+func getALSGain(g uint8) uint8 {
+	switch g {
+	case 1:
+		return 0
+	case 4:
+		return 1
+	case 16:
+		return 2
+	case 64:
+		return 3
+	default:
+		return 0
+	}
+}

apds9960/apds9960_generic.go

@@ -0,0 +1,9 @@
+//go:build !nano_33_ble
+
+package apds9960
+
+// Configure sets up the APDS-9960 device.
+func (d *Device) Configure(cfg Configuration) {
+	// configure device
+	d.configureDevice(cfg)
+}

apds9960/apds9960_nano_33_ble.go

@@ -0,0 +1,23 @@
+//go:build nano_33_ble
+
+package apds9960
+
+import (
+	"machine"
+	"time"
+)
+
+// Configure sets up the APDS-9960 device.
+func (d *Device) Configure(cfg Configuration) {
+
+	// Following lines are Nano 33 BLE specific, they have nothing to do with sensor per se
+	machine.LSM_PWR.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.LSM_PWR.High()
+	machine.I2C_PULLUP.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.I2C_PULLUP.High()
+	// Wait a moment
+	time.Sleep(10 * time.Millisecond)
+
+	// configure device
+	d.configureDevice(cfg)
+}

apds9960/registers.go

@@ -0,0 +1,78 @@
+package apds9960
+
+const (
+
+	// I2C address
+	ADPS9960_ADDRESS = 0x39
+
+	// control/status registers
+	APDS9960_RAM_REG        = 0x00
+	APDS9960_ENABLE_REG     = 0x80
+	APDS9960_ATIME_REG      = 0x81
+	APDS9960_WTIME_REG      = 0x83
+	APDS9960_AILTIL_REG     = 0x84
+	APDS9960_AILTH_REG      = 0x85
+	APDS9960_AIHTL_REG      = 0x86
+	APDS9960_AIHTH_REG      = 0x87
+	APDS9960_PILT_REG       = 0x89
+	APDS9960_PIHT_REG       = 0x8B
+	APDS9960_PERS_REG       = 0x8C
+	APDS9960_CONFIG1_REG    = 0x8D
+	APDS9960_PPULSE_REG     = 0x8E
+	APDS9960_CONTROL_REG    = 0x8F
+	APDS9960_CONFIG2_REG    = 0x90
+	APDS9960_ID_REG         = 0x92
+	APDS9960_STATUS_REG     = 0x93
+	APDS9960_CDATAL_REG     = 0x94
+	APDS9960_CDATAH_REG     = 0x95
+	APDS9960_RDATAL_REG     = 0x96
+	APDS9960_RDATAH_REG     = 0x97
+	APDS9960_GDATAL_REG     = 0x98
+	APDS9960_GDATAH_REG     = 0x99
+	APDS9960_BDATAL_REG     = 0x9A
+	APDS9960_BDATAH_REG     = 0x9B
+	APDS9960_PDATA_REG      = 0x9C
+	APDS9960_POFFSET_UR_REG = 0x9D
+	APDS9960_POFFSET_DL_REG = 0x9E
+	APDS9960_CONFIG3_REG    = 0x9F
+	APDS9960_GPENTH_REG     = 0xA0
+	APDS9960_GEXTH_REG      = 0xA1
+	APDS9960_GCONF1_REG     = 0xA2
+	APDS9960_GCONF2_REG     = 0xA3
+	APDS9960_GOFFSET_U_REG  = 0xA4
+	APDS9960_GOFFSET_D_REG  = 0xA5
+	APDS9960_GOFFSET_L_REG  = 0xA7
+	APDS9960_GOFFSET_R_REG  = 0xA9
+	APDS9960_GPULSE_REG     = 0xA6
+	APDS9960_GCONF3_REG     = 0xAA
+	APDS9960_GCONF4_REG     = 0xAB
+	APDS9960_GFLVL_REG      = 0xAE
+	APDS9960_GSTATUS_REG    = 0xAF
+	APDS9960_IFORCE_REG     = 0xE4
+	APDS9960_PICLEAR_REG    = 0xE5
+	APDS9960_CICLEAR_REG    = 0xE6
+	APDS9960_AICLEAR_REG    = 0xE7
+	APDS9960_GFIFO_U_REG    = 0xFC
+	APDS9960_GFIFO_D_REG    = 0xFD
+	APDS9960_GFIFO_L_REG    = 0xFE
+	APDS9960_GFIFO_R_REG    = 0xFF
+)
+
+const (
+
+	// sensor modes
+	MODE_NONE = iota
+	MODE_PROXIMITY
+	MODE_COLOR
+	MODE_GESTURE
+)
+
+const (
+
+	// detected gestures
+	GESTURE_NONE = iota
+	GESTURE_UP
+	GESTURE_DOWN
+	GESTURE_LEFT
+	GESTURE_RIGHT
+)

ateccx08/ateccx08.go

@@ -0,0 +1,258 @@
+// Package ateccx08 provides a driver for the ATECCx08 I2C cryptographic co-processor.
+//
+// Datasheet: https://datasheet.octopart.com/ATSAMA5D27-WLSOM1-Microchip-datasheet-149595509.pdf
+package ateccx08 // import "tinygo.org/x/drivers/ateccx08"
+
+import (
+	"errors"
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+var (
+	maxCommandTime = (200 + 50) * time.Millisecond
+)
+
+var (
+	ErrWakeup          = errors.New("error on wakeup")
+	ErrInvalidCRCCheck = errors.New("invalid CRC check")
+	ErrLockFailed      = errors.New("locked failed")
+)
+
+type Device struct {
+	bus     drivers.I2C
+	Address uint8
+}
+
+// New returns ATECCx08 device for the provided I2C bus using default address.
+func New(i2c drivers.I2C) *Device {
+	return &Device{
+		bus:     i2c,
+		Address: Address,
+	}
+}
+
+// Configure the ATECCx08 device.
+func (d *Device) Configure() error {
+	return nil
+}
+
+// Connected returns whether ATECCx08 has been found.
+func (d *Device) Connected() bool {
+	if err := d.Wakeup(); err != nil {
+		return false
+	}
+
+	v, err := d.Version()
+	if err != nil {
+		return false
+	}
+
+	return (v == ATECC508 || v == ATECC608)
+}
+
+// Wakeup the ATECC by trying to write something to address 0x00
+func (d *Device) Wakeup() error {
+	d.bus.Tx(uint16(0x0), []byte{0x00}, nil)
+	time.Sleep(1500 * time.Microsecond)
+	d.bus.Tx(uint16(d.Address), []byte{0x00}, nil)
+	time.Sleep(maxCommandTime)
+
+	var status [4]byte
+	if err := d.readResponse(status[:]); err != nil {
+		return err
+	}
+
+	if status[0] != StatusAfterWake {
+		return ErrWakeup
+	}
+
+	return nil
+}
+
+// Sleep puts the ATECC to sleep.
+func (d *Device) Sleep() {
+	d.bus.Tx(uint16(d.Address), []byte{0x01}, nil)
+	time.Sleep(time.Millisecond)
+}
+
+// Idle puts the ATECC in idle mode.
+func (d *Device) Idle() {
+	d.bus.Tx(uint16(d.Address), []byte{0x02}, nil)
+	time.Sleep(time.Millisecond)
+}
+
+type ATECCVersion uint16
+
+func (at ATECCVersion) String() string {
+	switch at {
+	case ATECC508:
+		return "ATECC508"
+	case ATECC608:
+		return "ATECC608"
+	case ATECCNone:
+		return "No ATECCx08"
+	default:
+		return "Unknown"
+	}
+}
+
+// Version returns what version of ATECC is being used.
+// Either ATECC508, ATECC608, or ATECCNone.
+func (d *Device) Version() (ATECCVersion, error) {
+	var version [4]byte
+	d.Wakeup()
+	defer d.Idle()
+
+	d.sendCommand(cmdInfo, 0x00, 0, nil)
+
+	time.Sleep(maxCommandTime)
+	if err := d.readResponse(version[:]); err != nil {
+		return ATECCNone, err
+	}
+
+	return ATECCVersion(uint16(version[2])<<8 | uint16(version[3])&0xf000), nil
+}
+
+// Random returns an array of 32 byte-sized random numbers.
+func (d *Device) Random() ([32]byte, error) {
+	var random [32]byte
+	d.Wakeup()
+	defer d.Idle()
+
+	d.sendCommand(cmdRandom, 0x00, 0, nil)
+	time.Sleep(23 * time.Millisecond)
+
+	err := d.readResponse(random[:])
+	return random, err
+}
+
+// Read reads from the device memory.
+func (d *Device) Read(zone, address int, data []byte) error {
+	d.Wakeup()
+	defer d.Idle()
+
+	d.sendCommand(cmdRead, byte(zone), uint16(address), nil)
+	time.Sleep(5 * time.Millisecond)
+
+	return d.readResponse(data)
+}
+
+// IsLocked checks to see if the ATECC is locked.
+// Config zone (0) must be locked to generate random numbers.
+func (d *Device) IsLocked() bool {
+	return d.IsZoneLocked(0)
+}
+
+// IsZoneLocked checks to see if a specific zone in the ATECC is locked.
+func (d *Device) IsZoneLocked(zone int) bool {
+	var config [4]byte
+
+	if zone < 0 || zone > 8 {
+		return false
+	}
+
+	switch zone {
+	case 0, 1:
+		if err := d.Read(0, 0x15, config[:]); err != nil {
+			return false
+		}
+
+		// LockConfig
+		loc := 3
+
+		// LockData
+		if zone == 1 {
+			loc = 2
+		}
+
+		if config[loc] == 0 {
+			return true
+		}
+
+	default:
+		if err := d.Read(0, 0x16, config[:]); err != nil {
+			return false
+		}
+
+		slot := byte(zone<<2) | 2
+
+		if (config[0] & slot) == 0 {
+			return true
+		}
+
+		return false
+	}
+
+	return false
+}
+
+// Lock locks a zone in the device.
+// Note that you cannot unlock a device zone once locked,
+// so make sure you know what you are doing!
+func (d *Device) Lock(zone int) error {
+	var status [1]byte
+	d.Wakeup()
+	defer d.Idle()
+
+	d.sendCommand(cmdLock, byte(zone)|0x80, 0, nil)
+	time.Sleep(32 * time.Millisecond)
+
+	d.readResponse(status[:])
+
+	if status[0] != 0 {
+		return ErrLockFailed
+	}
+
+	return nil
+}
+
+var cmdBuf [64]byte
+
+func (d *Device) sendCommand(opcode, param1 byte, param2 uint16, data []byte) error {
+	cmdBuf[0] = 0x03
+	cmdBuf[1] = byte(8 + len(data) - 1)
+	cmdBuf[2] = opcode
+	cmdBuf[3] = param1
+	cmdBuf[4] = byte(param2 & 0xff)
+	cmdBuf[5] = byte(param2 >> 8)
+	copy(cmdBuf[6:], data)
+
+	crc := crc16(cmdBuf[1 : 6+len(data)])
+	cmdBuf[6+len(data)] = crc[0]
+	cmdBuf[6+len(data)+1] = crc[1]
+
+	if err := d.bus.Tx(uint16(d.Address), cmdBuf[:6+len(data)+2], nil); err != nil {
+		return err
+	}
+
+	time.Sleep(time.Millisecond)
+	return nil
+}
+
+func (d *Device) readResponse(data []byte) error {
+	var sz [1]byte
+	if err := d.bus.Tx(uint16(d.Address), []byte{cmdAddress}, sz[:]); err != nil {
+		return err
+	}
+
+	rx := make([]byte, sz[0])
+	if err := d.bus.Tx(uint16(d.Address), []byte{cmdAddress}, rx); err != nil {
+		return err
+	}
+
+	size := len(rx) - 2
+	payload := rx[:size]
+	payloaddata := rx[1:size]
+	payloadcrc := rx[size:]
+
+	crcCheck := crc16(payload)
+	if !(crcCheck[0] == payloadcrc[0] &&
+		crcCheck[1] == payloadcrc[1]) {
+		return ErrInvalidCRCCheck
+	}
+
+	copy(data, payloaddata)
+	return nil
+}

ateccx08/crc16.go

@@ -0,0 +1,32 @@
+// from https://github.com/usbarmory/armoryctl/blob/master/atecc608/atecc608.go#L104
+// thank you!
+package ateccx08
+
+const (
+	CRC16Poly uint16 = 0x8005
+)
+
+func crc16(data []byte) []byte {
+	var crc uint16
+
+	for i := 0; i < len(data); i++ {
+		for shift := uint8(0x01); shift > 0x00; shift <<= 1 {
+			// data and crc bits
+			var d uint8
+			var c uint8
+
+			if uint8(data[i])&uint8(shift) != 0 {
+				d = 1
+			}
+
+			c = uint8(crc >> 15)
+			crc <<= 1
+
+			if d != c {
+				crc ^= CRC16Poly
+			}
+		}
+	}
+
+	return []byte{byte(crc & 0xff), byte(crc >> 8)}
+}

ateccx08/registers.go

@@ -0,0 +1,39 @@
+package ateccx08
+
+const (
+	// Address is default I2C address.
+	Address = 0x60
+)
+
+const (
+	ATECCNone = 0
+	ATECC508  = 0x5000
+	ATECC608  = 0x6000
+)
+
+const (
+	cmdAddress = 0x03
+	cmdCounter = 0x24
+	cmdGenKey  = 0x40
+	cmdInfo    = 0x30
+	cmdLock    = 0x17
+	cmdNonce   = 0x16
+	cmdRandom  = 0x1B
+	cmdSHA     = 0x47
+	cmdSign    = 0x41
+	cmdWrite   = 0x12
+	cmdRead    = 0x02
+)
+
+const (
+	StatusSuccess         = 0x00
+	StatusMiscompare      = 0x01
+	StatusParseError      = 0x03
+	StatusECCFault        = 0x05
+	StatusSelfTestError   = 0x07
+	StatusHealthTestError = 0x08
+	StatusExecutionError  = 0x0f
+	StatusAfterWake       = 0x11
+	StatusWatchdogExpire  = 0xee
+	StatusCRCError        = 0xff
+)

axp192/axp192.go

@@ -0,0 +1,257 @@
+// Package axp192 provides a driver for the axp192 I2C Enhanced single Cell
+// Li-Battery and Power System Management IC.
+//
+// http://www.x-powers.com/en.php/Info/product_detail/article_id/29
+// Datasheet: https://github.com/m5stack/M5-Schematic/blob/master/Core/AXP192%20Datasheet_v1.1_en_draft_2211.pdf
+package axp192 // import "tinygo.org/x/drivers/axp192"
+
+import (
+	"tinygo.org/x/drivers"
+)
+
+type Error uint8
+
+const (
+	ErrInvalidID Error = 0x1
+)
+
+func (e Error) Error() string {
+	switch e {
+	case ErrInvalidID:
+		return "Invalid chip ID"
+	default:
+		return "Unknown error"
+	}
+}
+
+type Device struct {
+	bus     drivers.I2C
+	buf     []byte
+	Address uint8
+}
+
+// New returns AXP192 device for the provided I2C bus using default address.
+func New(i2c drivers.I2C) *Device {
+	return &Device{
+		bus:     i2c,
+		buf:     make([]byte, 2),
+		Address: Address,
+	}
+}
+
+type Config struct {
+}
+
+// Configure the AXP192 device.
+func (d *Device) Configure(config Config) error {
+	return nil
+}
+
+// ReadPowerSupplyStatus reads power supply status.
+func (d *Device) ReadPowerSupplyStatus() uint8 {
+	return d.read8bit(RegPowerSupplyStatus)
+}
+
+// SetVbusIPSOutAccessManagement sets VBUS-IPSOUT access management.
+func (d *Device) SetVbusIPSOutAccessManagement(a uint8) {
+	d.write1Byte(RegVbusIPSOutAccessManagement, a)
+}
+
+// GetVbusIPSOutAccessManagement gets VBUS-IPSOUT access management.
+func (d *Device) GetVbusIPSOutAccessManagement() uint8 {
+	return d.read8bit(RegVbusIPSOutAccessManagement)
+}
+
+// SetGPIO1Control sets GPIO1 function.
+func (d *Device) SetGPIO1Control(a uint8) {
+	d.write1Byte(RegGPIO1Control, a)
+}
+
+// GetGPIO1Control gets GPIO1 function.
+func (d *Device) GetGPIO1Control() uint8 {
+	return d.read8bit(RegGPIO1Control)
+}
+
+// SetGPIO2Control sets GPIO2 function.
+func (d *Device) SetGPIO2Control(a uint8) {
+	d.write1Byte(RegGPIO2Control, a)
+}
+
+// GetGPIO2Control gets GPIO2 function.
+func (d *Device) GetGPIO2Control() uint8 {
+	return d.read8bit(RegGPIO2Control)
+}
+
+// SetGPIO20SignalStatus sets GPIO[2:0] signal status.
+func (d *Device) SetGPIO20SignalStatus(a uint8) {
+	d.write1Byte(RegGPIO20SignalStatus, a)
+}
+
+// GetGPIO20SignalStatus gets GPIO[2:0] signal status.
+func (d *Device) GetGPIO20SignalStatus() uint8 {
+	return d.read8bit(RegGPIO20SignalStatus)
+}
+
+// SetBackupBatteryChargingControl sets backup battery charge control.
+func (d *Device) SetBackupBatteryChargingControl(a uint8) {
+	d.write1Byte(RegBackupBatteryChargingControl, a)
+}
+
+// GetBackupBatteryChargingControl gets backup battery charge control.
+func (d *Device) GetBackupBatteryChargingControl() uint8 {
+	return d.read8bit(RegBackupBatteryChargingControl)
+}
+
+// SetDCDC1VoltageSet sets DC-DC1 output voltage.
+func (d *Device) SetDCDC1VoltageSet(a uint8) {
+	d.write1Byte(RegDCDC1VoltageSet, a)
+}
+
+// GetDCDC1VoltageSet gets DC-DC1 output voltage.
+func (d *Device) GetDCDC1VoltageSet() uint8 {
+	return d.read8bit(RegDCDC1VoltageSet)
+}
+
+// SetDCDC2VoltageSet sets DC-DC2 dynamic voltage parameter.
+func (d *Device) SetDCDC2VoltageSet(a uint8) {
+	d.write1Byte(RegDCDC2VoltageSet, a)
+}
+
+// GetDCDC2VoltageSet gets DC-DC2 dynamic voltage parameter.
+func (d *Device) GetDCDC2VoltageSet() uint8 {
+	return d.read8bit(RegDCDC2VoltageSet)
+}
+
+// SetDCDC3VoltageSet sets DC-DC3 output voltage.
+func (d *Device) SetDCDC3VoltageSet(a uint8) {
+	d.write1Byte(RegDCDC3VoltageSet, a)
+}
+
+// GetDCDC3VoltageSet gets DC-DC3 output voltage.
+func (d *Device) GetDCDC3VoltageSet() uint8 {
+	return d.read8bit(RegDCDC3VoltageSet)
+}
+
+// SetLDO23VoltageSet sets LDO2/3 output voltage.
+func (d *Device) SetLDO23VoltageSet(a uint8) {
+	d.write1Byte(RegLDO23VoltageSet, a)
+}
+
+// GetLDO23VoltageSet gets LDO2/3 output voltage.
+func (d *Device) GetLDO23VoltageSet() uint8 {
+	return d.read8bit(RegLDO23VoltageSet)
+}
+
+// SetDCDC13LDO23Switch sets DC-DC1/3 & LOD2/3 output control.
+func (d *Device) SetDCDC13LDO23Switch(a uint8) {
+	d.write1Byte(RegDCDC13LDO23Switch, a)
+}
+
+// GetDCDC13LDO23Switch gets DC-DC1/3 & LOD2/3 output control.
+func (d *Device) GetDCDC13LDO23Switch() uint8 {
+	return d.read8bit(RegDCDC13LDO23Switch)
+}
+
+// SetGPIO43FunctionControl sets GPIO[4:3] pin function.
+func (d *Device) SetGPIO43FunctionControl(a uint8) {
+	d.write1Byte(RegGPIO43FunctionControl, a)
+}
+
+// GetGPIO43FunctionControl gets GPIO[4:3] pin function.
+func (d *Device) GetGPIO43FunctionControl() uint8 {
+	return d.read8bit(RegGPIO43FunctionControl)
+}
+
+// SetPEKParameterSet sets PEK press key parameter.
+func (d *Device) SetPEKParameterSet(a uint8) {
+	d.write1Byte(RegPEKParameterSet, a)
+}
+
+// GetPEKParameterSet gets PEK press key parameter.
+func (d *Device) GetPEKParameterSet() uint8 {
+	return d.read8bit(RegPEKParameterSet)
+}
+
+// SetADCEnableSet sets ADC enable 1.
+func (d *Device) SetADCEnableSet(a uint8) {
+	d.write1Byte(RegADCEnableSet, a)
+}
+
+// GetADCEnableSet gets ADC enable 1.
+func (d *Device) GetADCEnableSet() uint8 {
+	return d.read8bit(RegADCEnableSet)
+}
+
+// SetGPIO43SignalStatus sets GPIO[4:3] signal status.
+func (d *Device) SetGPIO43SignalStatus(a uint8) {
+	d.write1Byte(RegGPIO43SignalStatus, a)
+}
+
+// GetGPIO43SignalStatus gets GPIO[4:3] signal status.
+func (d *Device) GetGPIO43SignalStatus() uint8 {
+	return d.read8bit(RegGPIO43SignalStatus)
+}
+
+// SetDCVoltage sets DC voltage.
+func (d *Device) SetDCVoltage(number uint8, voltage uint16) {
+	if voltage < 700 {
+		voltage = 0
+	} else {
+		voltage = (voltage - 700) / 25
+	}
+
+	switch number {
+	case 0:
+		v := d.GetDCDC1VoltageSet()
+		d.SetDCDC1VoltageSet((v & 0x80) | (uint8(voltage) & 0x7F))
+	case 1:
+		v := d.GetDCDC2VoltageSet()
+		d.SetDCDC2VoltageSet((v & 0x80) | (uint8(voltage) & 0x7F))
+	case 2:
+		v := d.GetDCDC3VoltageSet()
+		d.SetDCDC3VoltageSet((v & 0x80) | (uint8(voltage) & 0x7F))
+	}
+}
+
+// SetLDOVoltage sets LDO voltage.
+func (d *Device) SetLDOVoltage(number uint8, voltage uint16) {
+	if voltage > 3300 {
+		voltage = 15
+	} else {
+		voltage = (voltage / 100) - 18
+	}
+
+	switch number {
+	case 2:
+		v := d.GetLDO23VoltageSet()
+		d.SetLDO23VoltageSet((v & 0x0F) | (uint8(voltage) << 4))
+		break
+	case 3:
+		v := d.GetLDO23VoltageSet()
+		d.SetLDO23VoltageSet((v & 0xF0) | uint8(voltage))
+		break
+	}
+}
+
+// SetLDOEnable enable LDO.
+func (d *Device) SetLDOEnable(number uint8, state bool) {
+	mark := uint8(0x01)
+	mark <<= number
+	switch number {
+	case 2:
+		v := d.GetDCDC13LDO23Switch()
+		d.SetDCDC13LDO23Switch(v | mark)
+	case 3:
+		v := d.GetDCDC13LDO23Switch()
+		d.SetDCDC13LDO23Switch(v & (^mark))
+	}
+}
+
+func (d *Device) write1Byte(reg, data uint8) {
+	d.bus.WriteRegister(d.Address, reg, []byte{data})
+}
+
+func (d *Device) read8bit(reg uint8) uint8 {
+	d.bus.ReadRegister(d.Address, reg, d.buf[:1])
+	return d.buf[0]
+}

axp192/m5stack-core2-axp192/axp192.go

@@ -0,0 +1,158 @@
+package axp192
+
+import (
+	"time"
+
+	"tinygo.org/x/drivers"
+	axp192orig "tinygo.org/x/drivers/axp192"
+)
+
+// Device wraps an I2C connection to a AXP192 device.
+type Device struct {
+	*axp192orig.Device
+	LED    Pin
+	RST    Pin
+	SPK_EN Pin
+}
+
+// New creates a new AXP192 connection. The I2C bus must already be
+// configured.
+//
+// This function only creates the Device object, it does not touch the device.
+func New(i2c drivers.I2C) *Device {
+	d := axp192orig.New(i2c)
+
+	axp := &Device{
+		Device: d,
+	}
+	axp.LED = Pin{pin: 1, axp: axp}
+	axp.SPK_EN = Pin{pin: 2, axp: axp}
+	axp.RST = Pin{pin: 4, axp: axp}
+
+	axp.begin()
+
+	return axp
+}
+
+type Config struct {
+}
+
+// Configure sets up the device for communication
+func (d *Device) Configure(config Config) error {
+	return d.Device.Configure(axp192orig.Config{})
+}
+
+func (d *Device) begin() {
+	d.SetVbusIPSOutAccessManagement((d.GetVbusIPSOutAccessManagement() & 0x04) | 0x02)
+	d.SetGPIO1Control(d.GetGPIO1Control() & 0xF8)
+	d.SetGPIO2Control(d.GetGPIO2Control() & 0xF8)
+	d.SetBackupBatteryChargingControl((d.GetBackupBatteryChargingControl() & 0x1C) | 0xA2)
+	d.SetESPVoltage(3350)
+	d.SetLcdVoltage(3300)
+	d.SetLDOVoltage(2, 3300) //Periph power voltage preset (LCD_logic, SD card)
+	d.SetLDOVoltage(3, 2000) //Vibrator power voltage preset
+
+	d.SetLDOEnable(2, true)
+	d.SetDCDC3(true) // LCD Backlight
+	// GPIO4 : LCD Reset
+	d.SetGPIO43FunctionControl((d.GetGPIO43FunctionControl() & 0x72) | 0x84)
+	// Power On/Off Setting
+	d.SetPEKParameterSet(0x4C)
+	d.SetADCEnableSet(0xFF)
+
+	d.RST.Low()
+	time.Sleep(100 * time.Millisecond)
+	d.RST.High()
+	time.Sleep(100 * time.Millisecond)
+}
+
+// ToggleLED toggles LED connected to AXP192.
+func (d *Device) ToggleLED() {
+	v := d.GetGPIO20SignalStatus()
+	if (v & 0x02) > 0 {
+		d.SetGPIO20SignalStatus(v & 0xFD)
+	} else {
+		d.SetGPIO20SignalStatus(v | 0x02)
+	}
+}
+
+// SetESPVoltage sets voltage of ESP32.
+func (d *Device) SetESPVoltage(voltage uint16) {
+	if voltage >= 3000 && voltage <= 3400 {
+		d.SetDCVoltage(0, voltage)
+	}
+}
+
+// SetLcdVoltage sets voltage of LCD.
+func (d *Device) SetLcdVoltage(voltage uint16) {
+	if voltage >= 2500 && voltage <= 3300 {
+		d.SetDCVoltage(2, voltage)
+	}
+}
+
+// SetDCDC3 enables or disables DCDC3.
+func (d *Device) SetDCDC3(State bool) {
+	v := d.GetDCDC13LDO23Switch()
+	if State == true {
+		v = (1 << 1) | v
+	} else {
+		v = ^(uint8(1) << 1) & v
+	}
+	d.SetDCDC13LDO23Switch(v)
+}
+
+// Pin is a single pin on AXP192.
+type Pin struct {
+	pin uint8
+	axp *Device
+}
+
+// High sets this GPIO pin to high.
+func (p Pin) High() {
+	switch p.pin {
+	case 1: // LED
+		v := p.axp.GetGPIO20SignalStatus()
+		p.axp.SetGPIO20SignalStatus(v | 0x02)
+	case 2: // SPK_EN
+	case 4: // RST
+		v := p.axp.GetGPIO43SignalStatus()
+		v |= uint8(0x02)
+		p.axp.SetGPIO43SignalStatus(v)
+	}
+}
+
+// Low sets this GPIO pin to low.
+func (p Pin) Low() {
+	switch p.pin {
+	case 1: // LED
+		v := p.axp.GetGPIO20SignalStatus()
+		p.axp.SetGPIO20SignalStatus(v & 0xFD)
+	case 2: // SPK_EN
+	case 4: // RST
+		v := p.axp.GetGPIO43SignalStatus()
+		v &= ^uint8(0x02)
+		p.axp.SetGPIO43SignalStatus(v)
+	}
+}
+
+// Toggle switches an output pin from low to high or from high to low.
+func (p Pin) Toggle() {
+	switch p.pin {
+	case 1: // LED
+		v := p.axp.GetGPIO20SignalStatus()
+		if (v & 0x02) == 0 {
+			p.axp.SetGPIO20SignalStatus(v | 0x02)
+		} else {
+			p.axp.SetGPIO20SignalStatus(v & 0xFD)
+		}
+	case 2: // SPK_EN
+	case 4: // RST
+		v := p.axp.GetGPIO43SignalStatus()
+		if (v & 0x02) == 0 {
+			v |= uint8(0x02)
+		} else {
+			v &= ^uint8(0x02)
+		}
+		p.axp.SetGPIO43SignalStatus(v)
+	}
+}

axp192/registers.go

@@ -0,0 +1,127 @@
+package axp192
+
+// power supply control class
+// 0x00 Power supply status register
+// 0x01  Power supply mode/charging status register
+// 0x04  OTG VBUS status register
+// 0x06‐09  Data buffer register
+// 0x10  EXTEN & DC‐DC2 switch register
+// 0x12  DC‐DC1/3 & LDO2/3switch register
+// 0x23  DC‐DC2 voltage set register
+// 0x25  DC‐DC2 voltage slope set register
+// 0x26  DC‐DC1voltage set register
+// 0x27  DC‐DC3 voltage set register
+// 0x28  LDO2/3 voltage set register
+// 0x30  VBUS‐IPSOUT access set register
+// 0x31  VOFF power off voltage set register
+// 0x32  Power off、battery detect、CHGLED control register
+// 0x33  Charging control register1
+// 0x34  Charging control register2
+// 0x35  Backup battery charging control register
+// 0x36  PEK parameter set register
+// 0x37  DCDC switch frequency set register
+// 0x38  Battery charging under temperature warning set register
+// 0x39  Battery charging over temperature warning set register
+// 0x3A  APS under voltage Level1 set register
+// 0x3B  APS under voltage Level2 set register
+// 0x3C  Battery discharging under temperature warning set register
+// 0x3D  Battery discharging over temperature warning set register
+// 0x80  DCDC mode set register
+// 0x82  ADC enable set register 1
+// 0x83  ADC enable set register 2
+// 0x84  ADC sample frequency set, TS pin control register
+// 0x85  GPIO [3:0] input range set register
+// 0x8A  Timer control register
+// 0x8B  VBUS monitor set register
+// 0x8F  Over temperature power off control register
+
+// GPIO control class
+// 0x90  GPIO0 control register
+// 0x91  GPIO0 LDO mode output voltage set register
+// 0x92  GPIO1 control register
+// 0x93  GPIO2 control register
+// 0x94  GPIO[2:0] signal status register
+// 0x95  GPIO[4:3] function control register
+// 0x96  GPIO[4:3] signal status register
+// 0x97  GPIO[2:0] pull down control register
+// 0x98  PWM1 frequency set register
+// 0x99  PWM1 duty ratio set register 1
+// 0x9A  PWM1 duty ratio set register 2
+// 0x9B  PWM2 frequency set register
+// 0x9C  PWM2 duty ratio set register 1
+// 0x9D  PWM2 duty ratio set register 2
+// 0x9E  GPIO5 control register
+
+// IRQ control class
+// 0x40  IRQ enable control register 1
+// 0x41  IRQ enable control register 2
+// 0x42  IRQ enable control register 3
+// 0x43  IRQ enable control register 4
+// 0x44  IRQ status register 1
+// 0x45  IRQ status register 2
+// 0x46  IRQ status register 3
+// 0x47  IRQ status register 4
+
+// ADC data class
+// 0x56  ACIN voltage ADC data high 8 bit
+// 0x57  ACIN voltage ADC data low 4 bit
+// 0x58  ACIN current ADC data high 8 bit
+// 0x59  ACIN current ADC data low 4 bit
+// 0x5A  VBUS voltage ADC data high 8 bit
+// 0x5B  VBUS voltage ADC data low 4 bit
+// 0x5C  VBUS current ADC data high 8 bit
+// 0x5D  VBUS current ADC data low 4 bit
+// 0x5E  AXP192 internal temperature monitor ADC data High 8 bit
+// 0x5F  AXP192 internal temperature monitor ADC data low 4 bit
+// 0x62  TS input ADC data High 8 bit，monitor battery temperature by default
+// 0x63  TS input ADC data low 4 bit，monitor battery temperature by default
+// 0x64  GPIO0 voltage ADC data high 8 bit
+// 0x65  GPIO0 voltage ADC data low 4 bit
+// 0x66  GPIO1 voltage ADC data high 8 bit
+// 0x67  GPIO1 voltage ADC data low 4 bit
+// 0x68  GPIO2 voltage ADC data high 8 bit
+// 0x69  GPIO2 voltage ADC data low 4 bit
+// 0x6A  GPIO[3] voltage ADC data high 8 bit
+// 0x6B  GPIO[3] voltage ADC data low 4 bit
+// 0x70  Battery instantaneous power high 8 bit
+// 0x71  Battery instantaneous power middle 8 bit
+// 0x72  Battery instantaneous power low 8 bit
+// 0x78  Battery voltage high 8 bit
+// 0x79  Battery voltage low 4 bit
+// 0x7A  Battery charging current high 8 bit
+// 0x7B  Battery charging current low 5 bit
+// 0x7C  Battery discharging current high 8 bit
+// 0x7D  Battery discharging current low 5 bit
+// 0x7E  APS voltage high 8 bit
+// 0x7F  APS voltage low 4 bit
+// 0xB0  Battery charging coulomb counter data register 3
+// 0xB1  Battery charging coulomb counter data register 2
+// 0xB2  Battery charging coulomb counter data register 1
+// 0xB3  Battery charging coulomb counter data register 0
+// 0xB4  Battery discharging coulomb counter data register 3
+// 0xB5  Battery discharging coulomb counter data register 2
+// 0xB6  Battery discharging coulomb counter data register 1
+// 0xB7  Battery discharging coulomb counter data register 0
+// 0xB8  Coulomb counter control register
+
+const (
+	// Address is default I2C address.
+	Address = 0x34
+
+	RegPowerSupplyStatus            = 0x00
+	RegDCDC13LDO23Switch            = 0x12
+	RegVbusIPSOutAccessManagement   = 0x30
+	RegBackupBatteryChargingControl = 0x35
+	RegDCDC2VoltageSet              = 0x25
+	RegDCDC1VoltageSet              = 0x26
+	RegDCDC3VoltageSet              = 0x27
+	RegLDO23VoltageSet              = 0x28
+	RegPEKParameterSet              = 0x36
+	RegADCEnableSet                 = 0x82
+
+	RegGPIO1Control          = 0x92
+	RegGPIO2Control          = 0x93
+	RegGPIO20SignalStatus    = 0x94
+	RegGPIO43FunctionControl = 0x95
+	RegGPIO43SignalStatus    = 0x96
+)

bh1750/bh1750.go

@@ -2,7 +2,6 @@
 //
 // Datasheet:
 // https://www.mouser.com/ds/2/348/bh1750fvi-e-186247.pdf
-//
 package bh1750 // import "tinygo.org/x/drivers/bh1750"
 
 import (

blinkm/blinkm.go

@@ -1,7 +1,6 @@
 // Package blinkm implements a driver for the BlinkM I2C RGB LED.
 //
 // Datasheet: http://thingm.com/fileadmin/thingm/downloads/BlinkM_datasheet.pdf
-//
 package blinkm // import "tinygo.org/x/drivers/blinkm"
 
 import "tinygo.org/x/drivers"

bme280/bme280.go

@@ -3,11 +3,11 @@
 //
 // Datasheet:
 // https://cdn-shop.adafruit.com/datasheets/BST-BME280_DS001-10.pdf
-//
 package bme280
 
 import (
 	"math"
+	"time"
 
 	"tinygo.org/x/drivers"
 )
@@ -34,11 +34,27 @@ type calibrationCoefficients struct {
 	h6 int8
 }
 
+type Oversampling byte
+type Mode byte
+type FilterCoefficient byte
+type Period byte
+
+// Config contains settings for filtering, sampling, and modes of operation
+type Config struct {
+	Pressure    Oversampling
+	Temperature Oversampling
+	Humidity    Oversampling
+	Period      Period
+	Mode        Mode
+	IIR         FilterCoefficient
+}
+
 // Device wraps an I2C connection to a BME280 device.
 type Device struct {
 	bus                     drivers.I2C
 	Address                 uint16
 	calibrationCoefficients calibrationCoefficients
+	Config                  Config
 }
 
 // New creates a new BME280 connection. The I2C bus must already be
@@ -52,9 +68,34 @@ func New(bus drivers.I2C) Device {
 	}
 }
 
-// Configure sets up the device for communication and
-// read the calibration coefficientes.
+// ConfigureWithSettings sets up the device for communication and
+// read the calibration coefficients.
+//
+// The default configuration is the Indoor Navigation settings
+// from the BME280 datasheet.
 func (d *Device) Configure() {
+	d.ConfigureWithSettings(Config{})
+}
+
+// ConfigureWithSettings sets up the device for communication and
+// read the calibration coefficients.
+//
+// The default configuration if config is left at defaults is
+// the Indoor Navigation settings from the BME280 datasheet.
+func (d *Device) ConfigureWithSettings(config Config) {
+	d.Config = config
+
+	// If config is not initialized, use Indoor Navigation defaults.
+	if d.Config == (Config{}) {
+		d.Config = Config{
+			Mode:        ModeNormal,
+			Period:      Period0_5ms,
+			Temperature: Sampling2X,
+			Humidity:    Sampling1X,
+			Pressure:    Sampling16X,
+			IIR:         Coeff16,
+		}
+	}
 
 	var data [24]byte
 	err := d.bus.ReadRegister(uint8(d.Address), REG_CALIBRATION, data[:])
@@ -94,10 +135,18 @@ func (d *Device) Configure() {
 	d.calibrationCoefficients.h4 = 0 + (int16(h2lsb[3]) << 4) | (int16(h2lsb[4] & 0x0F))
 	d.calibrationCoefficients.h5 = 0 + (int16(h2lsb[5]) << 4) | (int16(h2lsb[4]) >> 4)
 
-	d.bus.WriteRegister(uint8(d.Address), CTRL_HUMIDITY_ADDR, []byte{0x3f})
-	d.bus.WriteRegister(uint8(d.Address), CTRL_MEAS_ADDR, []byte{0xB7})
-	d.bus.WriteRegister(uint8(d.Address), CTRL_CONFIG, []byte{0x00})
+	d.Reset()
 
+	d.bus.WriteRegister(uint8(d.Address), CTRL_CONFIG, []byte{byte(d.Config.Period<<5) | byte(d.Config.IIR<<2)})
+	d.bus.WriteRegister(uint8(d.Address), CTRL_HUMIDITY_ADDR, []byte{byte(d.Config.Humidity)})
+
+	// Normal mode, start measuring now
+	if d.Config.Mode == ModeNormal {
+		d.bus.WriteRegister(uint8(d.Address), CTRL_MEAS_ADDR, []byte{
+			byte(d.Config.Temperature<<5) |
+				byte(d.Config.Pressure<<2) |
+				byte(d.Config.Mode)})
+	}
 }
 
 // Connected returns whether a BME280 has been found.
@@ -113,6 +162,20 @@ func (d *Device) Reset() {
 	d.bus.WriteRegister(uint8(d.Address), CMD_RESET, []byte{0xB6})
 }
 
+// SetMode can set the device to Sleep, Normal or Forced mode
+//
+// Calling this method is optional, Configure can be used to set the
+// initial mode if no mode change is desired.  This method is most
+// useful to switch between Sleep and Normal modes.
+func (d *Device) SetMode(mode Mode) {
+	d.Config.Mode = mode
+
+	d.bus.WriteRegister(uint8(d.Address), CTRL_MEAS_ADDR, []byte{
+		byte(d.Config.Temperature<<5) |
+			byte(d.Config.Pressure<<2) |
+			byte(d.Config.Mode)})
+}
+
 // ReadTemperature returns the temperature in celsius milli degrees (°C/1000)
 func (d *Device) ReadTemperature() (int32, error) {
 	data, err := d.readData()
@@ -149,7 +212,8 @@ func (d *Device) ReadHumidity() (int32, error) {
 // ReadAltitude returns the current altitude in meters based on the
 // current barometric pressure and estimated pressure at sea level.
 // Calculation is based on code from Adafruit BME280 library
-// 	https://github.com/adafruit/Adafruit_BME280_Library
+//
+//	https://github.com/adafruit/Adafruit_BME280_Library
 func (d *Device) ReadAltitude() (alt int32, err error) {
 	mPa, _ := d.ReadPressure()
 	atmP := float32(mPa) / 100000
@@ -186,6 +250,16 @@ func readIntLE(msb byte, lsb byte) int16 {
 // readData does a burst read from 0xF7 to 0xF0 according to the datasheet
 // resulting in an slice with 8 bytes 0-2 = pressure / 3-5 = temperature / 6-7 = humidity
 func (d *Device) readData() (data [8]byte, err error) {
+	if d.Config.Mode == ModeForced {
+		// Write the CTRL_MEAS register to trigger a measurement
+		d.bus.WriteRegister(uint8(d.Address), CTRL_MEAS_ADDR, []byte{
+			byte(d.Config.Temperature<<5) |
+				byte(d.Config.Pressure<<2) |
+				byte(d.Config.Mode)})
+
+		time.Sleep(d.measurementDelay())
+	}
+
 	err = d.bus.ReadRegister(uint8(d.Address), REG_PRESSURE, data[:])
 	if err != nil {
 		println(err)
@@ -256,3 +330,39 @@ func (d *Device) calculateHumidity(data [8]byte, tFine int32) int32 {
 	return int32(100 * h)
 
 }
+
+// measurementDelay returns how much time each measurement will take
+// on the device.
+//
+// This is used in forced mode to wait until a measurement is complete.
+func (d *Device) measurementDelay() time.Duration {
+	const MeasOffset = 1250
+	const MeasDur = 2300
+	const HumMeasOffset = 575
+	const MeasScalingFactor = 1000
+
+	// delay is based on over-sampling rate - this table converts from
+	// setting to number samples
+	sampleRateConv := []int{0, 1, 2, 4, 8, 16}
+
+	tempOsr := 16
+	if d.Config.Temperature <= Sampling16X {
+		tempOsr = sampleRateConv[d.Config.Temperature]
+	}
+
+	presOsr := 16
+	if d.Config.Temperature <= Sampling16X {
+		presOsr = sampleRateConv[d.Config.Pressure]
+	}
+
+	humOsr := 16
+	if d.Config.Temperature <= Sampling16X {
+		humOsr = sampleRateConv[d.Config.Humidity]
+	}
+
+	max_delay := ((MeasOffset + (MeasDur * tempOsr) +
+		((MeasDur * presOsr) + HumMeasOffset) +
+		((MeasDur * humOsr) + HumMeasOffset)) / MeasScalingFactor)
+
+	return time.Duration(max_delay) * time.Millisecond
+}

bme280/registers.go

@@ -20,6 +20,50 @@ const (
 	CHIP_ID  = 0x60
 )
 
+// Increasing sampling rate increases precision but also the wait time for measurements. The datasheet has a table of
+// suggested values for oversampling, output data rates, and iir filter coefficients by use case.
+const (
+	SamplingOff Oversampling = iota
+	Sampling1X
+	Sampling2X
+	Sampling4X
+	Sampling8X
+	Sampling16X
+)
+
+// In normal mode (the default) the sensor takes masurements periodically.  In forced
+// mode, the sensor takes a measurement only when requested.
+//
+// For use-cases with infrequent sampling, forced mode is more power efficient.
+const (
+	ModeNormal Mode = 0x03
+	ModeForced Mode = 0x01
+	ModeSleep  Mode = 0x00
+)
+
+// IIR filter coefficients, higher values means steadier measurements but slower reaction times
+const (
+	Coeff0 FilterCoefficient = iota
+	Coeff2
+	Coeff4
+	Coeff8
+	Coeff16
+)
+
+// Period of standby in normal mode which controls how often measurements are taken
+//
+// Note Period10ms and Period20ms are out of sequence, but are per the datasheet
+const (
+	Period0_5ms  Period = 0b000
+	Period62_5ms        = 0b001
+	Period125ms         = 0b010
+	Period250ms         = 0b011
+	Period500ms         = 0b100
+	Period1000ms        = 0b101
+	Period10ms          = 0b110
+	Period20ms          = 0b111
+)
+
 const (
 	SEALEVEL_PRESSURE float32 = 1013.25 // in hPa
 )

bmi160/bmi160.go

@@ -1,8 +1,11 @@
 package bmi160
 
-import "machine"
+import (
+	"machine"
+	"time"
 
-import "time"
+	"tinygo.org/x/drivers"
+)
 
 // DeviceSPI is the SPI interface to a BMI160 accelerometer/gyroscope. There is
 // also an I2C interface, but it is not yet supported.
@@ -10,14 +13,16 @@ type DeviceSPI struct {
 	// Chip select pin
 	CSB machine.Pin
 
+	buf [7]byte
+
 	// SPI bus (requires chip select to be usable).
-	Bus machine.SPI
+	Bus drivers.SPI
 }
 
 // NewSPI returns a new device driver. The pin and SPI interface are not
 // touched, provide a fully configured SPI object and call Configure to start
 // using this device.
-func NewSPI(csb machine.Pin, spi machine.SPI) *DeviceSPI {
+func NewSPI(csb machine.Pin, spi drivers.SPI) *DeviceSPI {
 	return &DeviceSPI{
 		CSB: csb, // chip select
 		Bus: spi,
@@ -77,7 +82,10 @@ func (d *DeviceSPI) Reset() error {
 
 // ReadTemperature returns the temperature in celsius milli degrees (°C/1000).
 func (d *DeviceSPI) ReadTemperature() (temperature int32, err error) {
-	data := []byte{0x80 | reg_TEMPERATURE_0, 0, 0}
+	data := d.buf[:3]
+	data[0] = 0x80 | reg_TEMPERATURE_0
+	data[1] = 0
+	data[2] = 0
 	d.CSB.Low()
 	err = d.Bus.Tx(data, data)
 	d.CSB.High()
@@ -110,7 +118,11 @@ func (d *DeviceSPI) ReadTemperature() (temperature int32, err error) {
 // and the sensor is not moving the returned value will be around 1000000 or
 // -1000000.
 func (d *DeviceSPI) ReadAcceleration() (x int32, y int32, z int32, err error) {
-	data := []byte{0x80 | reg_ACC_XL, 0, 0, 0, 0, 0, 0}
+	data := d.buf[:7]
+	data[0] = 0x80 | reg_ACC_XL
+	for i := 1; i < len(data); i++ {
+		data[i] = 0
+	}
 	d.CSB.Low()
 	err = d.Bus.Tx(data, data)
 	d.CSB.High()
@@ -136,7 +148,11 @@ func (d *DeviceSPI) ReadAcceleration() (x int32, y int32, z int32, err error) {
 // rotation along one axis and while doing so integrate all values over time,
 // you would get a value close to 360000000.
 func (d *DeviceSPI) ReadRotation() (x int32, y int32, z int32, err error) {
-	data := []byte{0x80 | reg_GYR_XL, 0, 0, 0, 0, 0, 0}
+	data := d.buf[:7]
+	data[0] = 0x80 | reg_GYR_XL
+	for i := 1; i < len(data); i++ {
+		data[i] = 0
+	}
 	d.CSB.Low()
 	err = d.Bus.Tx(data, data)
 	d.CSB.High()
@@ -182,7 +198,9 @@ func (d *DeviceSPI) readRegister(address uint8) uint8 {
 	// I don't know why but it appears necessary to sleep for a bit here.
 	time.Sleep(time.Millisecond)
 
-	data := []byte{0x80 | address, 0}
+	data := d.buf[:2]
+	data[0] = 0x80 | address
+	data[1] = 0
 	d.CSB.Low()
 	d.Bus.Tx(data, data)
 	d.CSB.High()
@@ -195,7 +213,11 @@ func (d *DeviceSPI) writeRegister(address, data uint8) {
 	// I don't know why but it appears necessary to sleep for a bit here.
 	time.Sleep(time.Millisecond)
 
+	buf := d.buf[:2]
+	buf[0] = address
+	buf[1] = data
+
 	d.CSB.Low()
-	d.Bus.Tx([]byte{address, data}, []byte{0, 0})
+	d.Bus.Tx(buf, buf)
 	d.CSB.High()
 }

bmp180/bmp180.go

@@ -3,7 +3,6 @@
 //
 // Datasheet:
 // https://cdn-shop.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
-//
 package bmp180 // import "tinygo.org/x/drivers/bmp180"
 
 import (

bmp388/bmp388.go

@@ -0,0 +1,249 @@
+package bmp388
+
+import (
+	"errors"
+
+	"tinygo.org/x/drivers"
+)
+
+var (
+	errConfigWrite  = errors.New("bmp388: failed to configure sensor, check connection")
+	errConfig       = errors.New("bmp388: there is a problem with the configuration, try reducing ODR")
+	errCaliRead     = errors.New("bmp388: failed to read calibration coefficient register")
+	errSoftReset    = errors.New("bmp388: failed to perform a soft reset")
+	errNotConnected = errors.New("bmp388: not connected")
+)
+
+type Oversampling byte
+type Mode byte
+type OutputDataRate byte
+type FilterCoefficient byte
+
+// Config contains settings for filtering, sampling, and modes of operation
+type Config struct {
+	Pressure    Oversampling
+	Temperature Oversampling
+	Mode        Mode
+	ODR         OutputDataRate
+	IIR         FilterCoefficient
+}
+
+// Device wraps the I2C connection and configuration values for the BMP388
+type Device struct {
+	bus     drivers.I2C
+	Address uint8
+	cali    calibrationCoefficients
+	Config  Config
+}
+
+type calibrationCoefficients struct {
+	// Temperature compensation
+	t1 uint16
+	t2 uint16
+	t3 int8
+
+	// Pressure compensation
+	p1  int16
+	p2  int16
+	p3  int8
+	p4  int8
+	p5  uint16
+	p6  uint16
+	p7  int8
+	p8  int8
+	p9  int16
+	p10 int8
+	p11 int8
+}
+
+// New returns a bmp388 struct with the default I2C address. Configure must also be called after instanting
+func New(bus drivers.I2C) Device {
+	return Device{
+		bus:     bus,
+		Address: Address,
+	}
+}
+
+// Configure can enable settings on the BMP388 and reads the calibration coefficients
+func (d *Device) Configure(config Config) (err error) {
+	d.Config = config
+
+	if d.Config == (Config{}) {
+		d.Config.Mode = Normal
+	}
+
+	// Turning on the pressure and temperature sensors and setting the measurement mode
+	err = d.writeRegister(RegPwrCtrl, PwrPress|PwrTemp|byte(d.Config.Mode))
+
+	// Configure the oversampling, output data rate, and iir filter coefficient settings
+	err = d.writeRegister(RegOSR, byte(d.Config.Pressure|d.Config.Temperature<<3))
+	err = d.writeRegister(RegODR, byte(d.Config.ODR))
+	err = d.writeRegister(RegIIR, byte(d.Config.IIR<<1))
+
+	if err != nil {
+		return errConfigWrite
+	}
+
+	// Check if there is a problem with the given configuration
+	if d.configurationError() {
+		return errConfig
+	}
+
+	// Reading the builtin calibration coefficients and parsing them per the datasheet. The compensation formula given
+	// in the datasheet is implemented in floating point
+	buffer, err := d.readRegister(RegCali, 21)
+	if err != nil {
+		return errCaliRead
+	}
+
+	d.cali.t1 = uint16(buffer[1])<<8 | uint16(buffer[0])
+	d.cali.t2 = uint16(buffer[3])<<8 | uint16(buffer[2])
+	d.cali.t3 = int8(buffer[4])
+
+	d.cali.p1 = int16(buffer[6])<<8 | int16(buffer[5])
+	d.cali.p2 = int16(buffer[8])<<8 | int16(buffer[7])
+	d.cali.p3 = int8(buffer[9])
+	d.cali.p4 = int8(buffer[10])
+	d.cali.p5 = uint16(buffer[12])<<8 | uint16(buffer[11])
+	d.cali.p6 = uint16(buffer[14])<<8 | uint16(buffer[13])
+	d.cali.p7 = int8(buffer[15])
+	d.cali.p8 = int8(buffer[16])
+	d.cali.p9 = int16(buffer[18])<<8 | int16(buffer[17])
+	d.cali.p10 = int8(buffer[19])
+	d.cali.p11 = int8(buffer[20])
+
+	return nil
+}
+
+// Read the temperature registers and compute a compensation value for the temperature and pressure compensation
+// calculations. This is not the temperature itself.
+func (d *Device) tlinCompensate() (int64, error) {
+	rawTemp, err := d.readSensorData(RegTemp)
+	if err != nil {
+		return 0, err
+	}
+
+	// pulled from C driver: https://github.com/BoschSensortec/BMP3-Sensor-API/blob/master/bmp3.c
+	partialData1 := rawTemp - (256 * int64(d.cali.t1))
+	partialData2 := int64(d.cali.t2) * partialData1
+	partialData3 := (partialData1 * partialData1)
+	partialData4 := partialData3 * int64(d.cali.t3)
+	partialData5 := (partialData2 * 262144) + partialData4
+	return partialData5 / 4294967296, nil
+
+}
+
+// ReadTemperature returns the temperature in centicelsius, i.e 2426 / 100 = 24.26 C
+func (d *Device) ReadTemperature() (int32, error) {
+
+	tlin, err := d.tlinCompensate()
+	if err != nil {
+		return 0, err
+	}
+
+	temp := (tlin * 25) / 16384
+	return int32(temp), nil
+}
+
+// ReadPressure returns the pressure in centipascals, i.e 10132520 / 100 = 101325.20 Pa
+func (d *Device) ReadPressure() (int32, error) {
+
+	tlin, err := d.tlinCompensate()
+	if err != nil {
+		return 0, err
+	}
+	rawPress, err := d.readSensorData(RegPress)
+	if err != nil {
+		return 0, err
+	}
+
+	// code pulled from bmp388 C driver: https://github.com/BoschSensortec/BMP3-Sensor-API/blob/master/bmp3.c
+	partialData1 := tlin * tlin
+	partialData2 := partialData1 / 64
+	partialData3 := (partialData2 * tlin) / 256
+	partialData4 := (int64(d.cali.p8) * partialData3) / 32
+	partialData5 := (int64(d.cali.p7) * partialData1) * 16
+	partialData6 := (int64(d.cali.p6) * tlin) * 4194304
+	offset := (int64(d.cali.p5) * 140737488355328) + partialData4 + partialData5 + partialData6
+	partialData2 = (int64(d.cali.p4) * partialData3) / 32
+	partialData4 = (int64(d.cali.p3) * partialData1) * 4
+	partialData5 = (int64(d.cali.p2) - 16384) * tlin * 2097152
+	sensitivity := ((int64(d.cali.p1) - 16384) * 70368744177664) + partialData2 + partialData4 + partialData5
+	partialData1 = (sensitivity / 16777216) * rawPress
+	partialData2 = int64(d.cali.p10) * tlin
+	partialData3 = partialData2 + (65536 * int64(d.cali.p9))
+	partialData4 = (partialData3 * rawPress) / 8192
+
+	// dividing by 10 followed by multiplying by 10
+	// To avoid overflow caused by (pressure * partial_data4)
+	partialData5 = (rawPress * (partialData4 / 10)) / 512
+	partialData5 = partialData5 * 10
+	partialData6 = (int64)(uint64(rawPress) * uint64(rawPress))
+	partialData2 = (int64(d.cali.p11) * partialData6) / 65536
+	partialData3 = (partialData2 * rawPress) / 128
+	partialData4 = (offset / 4) + partialData1 + partialData5 + partialData3
+	compPress := ((uint64(partialData4) * 25) / uint64(1099511627776))
+	return int32(compPress), nil
+}
+
+// SoftReset commands the BMP388 to reset of all user configuration settings
+func (d *Device) SoftReset() error {
+	err := d.writeRegister(RegCmd, SoftReset)
+	if err != nil {
+		return errSoftReset
+	}
+	return nil
+}
+
+// Connected tries to reach the bmp388 and check its chip id register. Returns true if it was able to successfully
+// communicate over i2c and returns the correct value
+func (d *Device) Connected() bool {
+	data, err := d.readRegister(RegChipId, 1)
+	return err == nil && data[0] == ChipId // returns true if i2c comm was good and response equals 0x50
+}
+
+// SetMode changes the run mode of the sensor, NORMAL is the one to use for most cases. Use FORCED if you plan to take
+// measurements infrequently and want to conserve power. SLEEP will of course put the sensor to sleep
+func (d *Device) SetMode(mode Mode) error {
+	d.Config.Mode = mode
+	return d.writeRegister(RegPwrCtrl, PwrPress|PwrTemp|byte(d.Config.Mode))
+}
+
+func (d *Device) readSensorData(register byte) (data int64, err error) {
+
+	if !d.Connected() {
+		return 0, errNotConnected
+	}
+
+	// put the sensor back into forced mode to get a reading, the sensor goes back to sleep after taking one read in
+	// forced mode
+	if d.Config.Mode != Normal {
+		err = d.SetMode(Forced)
+		if err != nil {
+			return
+		}
+	}
+
+	bytes, err := d.readRegister(register, 3)
+	if err != nil {
+		return
+	}
+	data = int64(bytes[2])<<16 | int64(bytes[1])<<8 | int64(bytes[0])
+	return
+}
+
+// configurationError checks the register error for the configuration error bit. The bit is cleared on read by the bmp.
+func (d *Device) configurationError() bool {
+	data, err := d.readRegister(RegErr, 1)
+	return err == nil && (data[0]&0x04) != 0
+}
+
+func (d *Device) readRegister(register byte, len int) (data []byte, err error) {
+	data = make([]byte, len)
+	err = d.bus.ReadRegister(d.Address, register, data)
+	return
+}
+
+func (d *Device) writeRegister(register byte, data byte) error {
+	return d.bus.WriteRegister(d.Address, register, []byte{data})
+}

bmp388/registers.go

@@ -0,0 +1,84 @@
+// Package bmp388 provides a driver for Bosch's BMP388 digital temperature & pressure sensor.
+// The datasheet can be found here: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp388-ds001.pdf
+package bmp388
+
+const Address byte = 0x77 // default I2C address
+
+const (
+	RegChipId  byte = 0x00 // useful for checking the connection
+	RegCali    byte = 0x31 // pressure & temperature compensation calibration coefficients
+	RegPress   byte = 0x04 // start of pressure data registers
+	RegTemp    byte = 0x07 // start of temperature data registers
+	RegPwrCtrl byte = 0x1B // measurement mode & pressure/temperature sensor power register
+	RegOSR     byte = 0x1C // oversampling settings register
+	RegODR     byte = 0x1D //
+	RegCmd     byte = 0x7E // miscellaneous command register
+	RegStat    byte = 0x03 // sensor status register
+	RegErr     byte = 0x02 // error status register
+	RegIIR     byte = 0x1F
+)
+
+const (
+	ChipId    byte = 0x50 // correct response if reading from chip id register
+	PwrPress  byte = 0x01 // power on pressure sensor
+	PwrTemp   byte = 0x02 // power on temperature sensor
+	SoftReset byte = 0xB6 // command to reset all user configuration
+	DRDYPress byte = 0x20 // for checking if pressure data is ready
+	DRDYTemp  byte = 0x40 // for checking if pressure data is ready
+)
+
+// The difference between forced and normal mode is the bmp388 goes to sleep after taking a measurement in forced mode.
+// Set it to forced if you intend to take measurements sporadically and want to save power. The driver will handle
+// waking the sensor up when the sensor is in forced mode.
+const (
+	Normal Mode = 0x30
+	Forced Mode = 0x16
+	Sleep  Mode = 0x00
+)
+
+// Increasing sampling rate increases precision but also the wait time for measurements. The datasheet has a table of
+// suggested values for oversampling, output data rates, and iir filter coefficients by use case.
+const (
+	Sampling1X Oversampling = iota
+	Sampling2X
+	Sampling4X
+	Sampling8X
+	Sampling16X
+	Sampling32X
+)
+
+// Output data rates in Hz. If increasing the sampling rates you need to decrease the output data rates, else the bmp388
+// will freeze and Configure() will return a configuration error message. In that case keep decreasing the data rate
+// until the bmp is happy
+const (
+	Odr200 OutputDataRate = iota
+	Odr100
+	Odr50
+	Odr25
+	Odr12p5
+	Odr6p25
+	Odr3p1
+	Odr1p5
+	Odr0p78
+	Odr0p39
+	Odr0p2
+	Odr0p1
+	Odr0p05
+	Odr0p02
+	Odr0p01
+	Odr0p006
+	Odr0p003
+	Odr0p0015
+)
+
+// IIR filter coefficients, higher values means steadier measurements but slower reaction times
+const (
+	Coeff0 FilterCoefficient = iota
+	Coeff1
+	Coeff3
+	Coeff7
+	Coeff15
+	Coeff31
+	Coeff63
+	Coeff127
+)

buzzer/buzzer.go

@@ -1,5 +1,4 @@
 // Package buzzer provides a very simplistic driver for a connected buzzer or low-fidelity speaker.
-//
 package buzzer // import "tinygo.org/x/drivers/buzzer"
 
 import (
@@ -55,6 +54,12 @@ func (l *Device) Tone(hz, duration float64) (err error) {
 
 	tempo := ((60 / l.BPM) * (duration * 1000))
 
+	// no tone during rest, just let the duration pass.
+	if hz == Rest {
+		time.Sleep(time.Duration(tempo) * time.Millisecond)
+		return
+	}
+
 	for i := 0.0; i < tempo*1000; i += tone * 2.0 {
 		if err = l.On(); err != nil {
 			return

buzzer/notes.go

@@ -1,9 +1,9 @@
 package buzzer
 
 const (
-	Whole   = 4
-	Half    = 2
-	Quarter = 1
+	Whole   = 4.0
+	Half    = 2.0
+	Quarter = 1.0
 	Eighth  = 0.500
 )
 

cmd/convert2bin/convert2bin.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+)
+
+// See ../../image/README.md for the usage.
+
+func main() {
+	err := run(os.Args)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func run(args []string) error {
+	if len(args) < 2 {
+		return fmt.Errorf("usage: %s FILE")
+	}
+
+	b, err := ioutil.ReadFile(args[1])
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("const %s = \"\" +\n", strings.Replace(args[1], ".", "_", -1))
+
+	i := 0
+	max := 32
+	for i = 0; i < len(b); i++ {
+		bb := b[i]
+		if (i % max) == 0 {
+			fmt.Printf("	\"")
+		}
+		fmt.Printf("\\x%02X", bb)
+		if (i%max) == max-1 && i != len(b)-1 {
+			fmt.Printf("\" + \n")
+		}
+	}
+	if (i % max) < max-1 {
+		fmt.Printf("\"\n")
+	}
+
+	return nil
+}

dht/constants.go

@@ -0,0 +1,91 @@
+//go:build tinygo
+
+// Package dht provides a driver for DHTXX family temperature and humidity sensors.
+//
+// [1] Datasheet DHT11: https://www.mouser.com/datasheet/2/758/DHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf
+// [2] Datasheet DHT22: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf
+// Adafruit C++ driver: https://github.com/adafruit/DHT-sensor-library
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+import (
+	"machine"
+	"time"
+)
+
+// Celsius and Fahrenheit temperature scales
+type TemperatureScale uint8
+
+func (t TemperatureScale) convertToFloat(temp int16) float32 {
+	if t == C {
+		return float32(temp) / 10
+	} else {
+		// Fahrenheit
+		return float32(temp)*(9.0/50.) + 32.
+	}
+}
+
+// All functions return ErrorCode instance as error. This class can be used for more efficient error processing
+type ErrorCode uint8
+
+const (
+	startTimeout = time.Millisecond * 200
+	startingLow  = time.Millisecond * 20
+
+	C TemperatureScale = iota
+	F
+
+	ChecksumError ErrorCode = iota
+	NoSignalError
+	NoDataError
+	UpdateError
+	UninitializedDataError
+)
+
+// error interface implementation for ErrorCode
+func (e ErrorCode) Error() string {
+	switch e {
+	case ChecksumError:
+		// DHT returns ChecksumError if all the data from the sensor was received, but the checksum does not match.
+		return "checksum mismatch"
+	case NoSignalError:
+		// DHT returns NoSignalError if there was no reply from the sensor. Check sensor connection or the correct pin
+		// sis chosen,
+		return "no signal"
+	case NoDataError:
+		// DHT returns NoDataError if the connection was successfully initialized, but not all 40 bits from
+		// the sensor is received
+		return "no data"
+	case UpdateError:
+		// DHT returns UpdateError if ReadMeasurements function is called before time specified in UpdatePolicy or
+		// less than 2 seconds after past measurement
+		return "cannot update now"
+	case UninitializedDataError:
+		// DHT returns UninitializedDataError if user attempts to access data before first measurement
+		return "no measurements done"
+	}
+	// should never be reached
+	return "unknown error"
+}
+
+// Update policy of the DHT device. UpdateTime cannot be shorter than 2 seconds. According to dht specification sensor
+// will return undefined data if update requested less than 2 seconds before last usage
+type UpdatePolicy struct {
+	UpdateTime          time.Duration
+	UpdateAutomatically bool
+}
+
+var (
+	// timeout counter equal to number of ticks per 1 millisecond
+	timeout counter
+)
+
+func init() {
+	timeout = cyclesPerMillisecond()
+}
+
+func cyclesPerMillisecond() counter {
+	freq := machine.CPUFrequency()
+	freq /= 1000
+	return counter(freq)
+}

dht/device.go

@@ -0,0 +1,44 @@
+package dht
+
+import (
+	"encoding/binary"
+)
+
+// DeviceType is the enum type for device type
+type DeviceType uint8
+
+const (
+	DHT11 DeviceType = iota
+	DHT22
+)
+
+// extractData parses information received from the sensor.
+// The 2 first buffers are for the humidity and
+// the 2 following corresponds to the temperature.
+func (d DeviceType) extractData(buf []byte) (temp int16, hum uint16) {
+	switch d {
+	case DHT11:
+		hum = 10*uint16(buf[0]) + uint16(buf[1])
+		temp = int16(buf[2])
+		if buf[3]&0x80 > 0 {
+			temp = -1 - temp
+		}
+		temp *= 10
+		temp += int16(buf[3] & 0x0f)
+	case DHT22:
+		hum = binary.BigEndian.Uint16(buf[0:2])
+		temp = int16(buf[2]&0x7f)<<8 + int16(buf[3])
+		// the first bit corresponds to the sign bit
+		if buf[2]&0x80 > 0 {
+			temp = -temp
+		}
+	default:
+		// keeping this for retro-compatibility but not tested
+		hum = binary.LittleEndian.Uint16(buf[0:2])
+		temp = int16(buf[3])<<8 + int16(buf[2]&0x7f)
+		if buf[2]&0x80 > 0 {
+			temp = -temp
+		}
+	}
+	return
+}

dht/device_internal_test.go

@@ -0,0 +1,46 @@
+package dht
+
+import (
+	"testing"
+)
+
+func TestDeviceType_extractData(t *testing.T) {
+	bitStr := "0000001010001100000000010101111111101110"
+	buf := bitStringToBytes(bitStr)
+
+	tt := []struct {
+		name     string
+		d        DeviceType
+		buf      []byte
+		wantTemp int16
+		wantHum  uint16
+	}{
+		{
+			// temp = 35.1C hum = 65.2%
+			name: "DHT22", d: DHT22, buf: buf, wantTemp: 351, wantHum: 652,
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			gotTemp, gotHum := tc.d.extractData(tc.buf)
+			if gotTemp != tc.wantTemp {
+				t.Errorf("extractData() gotTemp = %v, want %v", gotTemp, tc.wantTemp)
+			}
+			if gotHum != tc.wantHum {
+				t.Errorf("extractData() gotHum = %v, want %v", gotHum, tc.wantHum)
+			}
+		})
+	}
+}
+
+func bitStringToBytes(s string) []byte {
+	b := make([]byte, (len(s)+(8-1))/8)
+	for i, r := range s {
+		if r < '0' || r > '1' {
+			panic("not in range")
+		}
+		b[i>>3] |= byte(r-'0') << uint(7-i&7)
+	}
+	return b
+}

dht/highfreq.go

@@ -0,0 +1,6 @@
+//go:build mimxrt1062 || stm32f405 || atsamd51 || stm32f103xx || k210 || stm32f407
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+// This file provides a definition of the counter for boards with frequency higher than 2^8 ticks per millisecond (>64MHz)
+type counter uint32

dht/lowfreq.go

@@ -0,0 +1,6 @@
+//go:build !mimxrt1062 && !stm32f405 && !atsamd51 && !stm32f103xx && !k210 && !stm32f407
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+// This file provides a definition of the counter for boards with frequency lower than 2^8 ticks per millisecond (<64MHz)
+type counter uint16

dht/thermometer.go

@@ -0,0 +1,221 @@
+//go:build tinygo
+
+// Package dht provides a driver for DHTXX family temperature and humidity sensors.
+//
+// [1] Datasheet DHT11: https://www.mouser.com/datasheet/2/758/DHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf
+// [2] Datasheet DHT22: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf
+// Adafruit C++ driver: https://github.com/adafruit/DHT-sensor-library
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+import (
+	"machine"
+	"runtime/interrupt"
+	"time"
+)
+
+// DummyDevice provides a basic interface for DHT devices.
+type DummyDevice interface {
+	ReadMeasurements() error
+	Measurements() (temperature int16, humidity uint16, err error)
+	Temperature() (int16, error)
+	TemperatureFloat(scale TemperatureScale) (float32, error)
+	Humidity() (uint16, error)
+	HumidityFloat() (float32, error)
+}
+
+// Basic implementation of the DummyDevice
+// This implementation takes measurements from sensor only with ReadMeasurements function
+// and does not provide a protection from too frequent calls for measurements.
+// Since taking measurements from the sensor is time consuming procedure and blocks interrupts,
+// user can avoid any hidden calls to the sensor.
+type device struct {
+	pin machine.Pin
+
+	measurements DeviceType
+	initialized  bool
+
+	temperature int16
+	humidity    uint16
+}
+
+// ReadMeasurements reads data from the sensor.
+// According to documentation pin should be always, but the t *device restores pin to the state before call.
+func (t *device) ReadMeasurements() error {
+	// initial waiting
+	state := powerUp(t.pin)
+	defer t.pin.Set(state)
+	err := t.read()
+	if err == nil {
+		t.initialized = true
+	}
+	return err
+}
+
+// Getter for temperature. Temperature method returns temperature as it is sent by device.
+// The temperature is measured temperature in Celsius multiplied by 10.
+// If no successful measurements for this device was performed, returns UninitializedDataError.
+func (t *device) Temperature() (int16, error) {
+	if !t.initialized {
+		return 0, UninitializedDataError
+	}
+	return t.temperature, nil
+}
+
+// Getter for temperature. TemperatureFloat returns temperature in a given scale.
+// If no successful measurements for this device was performed, returns UninitializedDataError.
+func (t *device) TemperatureFloat(scale TemperatureScale) (float32, error) {
+	if !t.initialized {
+		return 0, UninitializedDataError
+	}
+	return scale.convertToFloat(t.temperature), nil
+}
+
+// Getter for humidity. Humidity returns humidity as it is sent by device.
+// The humidity is measured in percentages multiplied by 10.
+// If no successful measurements for this device was performed, returns UninitializedDataError.
+func (t *device) Humidity() (uint16, error) {
+	if !t.initialized {
+		return 0, UninitializedDataError
+	}
+	return t.humidity, nil
+}
+
+// Getter for humidity. HumidityFloat returns humidity in percentages.
+// If no successful measurements for this device was performed, returns UninitializedDataError.
+func (t *device) HumidityFloat() (float32, error) {
+	if !t.initialized {
+		return 0, UninitializedDataError
+	}
+	return float32(t.humidity) / 10., nil
+}
+
+// Perform initialization of the communication protocol.
+// Device lowers the voltage on pin for startingLow=20ms and starts listening for response
+// Section 5.2 in [1]
+func initiateCommunication(p machine.Pin) {
+	// Send low signal to the device
+	p.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	p.Low()
+	time.Sleep(startingLow)
+	// Set pin to high and wait for reply
+	p.High()
+	p.Configure(machine.PinConfig{Mode: machine.PinInput})
+}
+
+// Measurements returns both measurements: temperature and humidity as they sent by the device.
+// If no successful measurements for this device was performed, returns UninitializedDataError.
+func (t *device) Measurements() (temperature int16, humidity uint16, err error) {
+	if !t.initialized {
+		return 0, 0, UninitializedDataError
+	}
+	temperature = t.temperature
+	humidity = t.humidity
+	err = nil
+	return
+}
+
+// Main routine that performs communication with the sensor
+func (t *device) read() error {
+	// initialize loop variables
+
+	// buffer for the data sent by the sensor. Sensor sends 40 bits = 5 bytes
+	bufferData := [5]byte{}
+	buf := bufferData[:]
+
+	// We perform measurements of the signal from the sensor by counting low and high cycles.
+	// The bit is determined by the relative length of the high signal to low signal.
+	// For 1, high signal will be longer than low, for 0---low is longer.
+	// See section 5.3 [1]
+	signalsData := [80]counter{}
+	signals := signalsData[:]
+
+	// Start communication protocol with sensor
+	initiateCommunication(t.pin)
+	// Wait for sensor's response and abort if sensor does not reply
+	err := waitForDataTransmission(t.pin)
+	if err != nil {
+		return err
+	}
+	// count low and high cycles for sensor's reply
+	receiveSignals(t.pin, signals)
+
+	// process received signals and store the result in the buffer. Abort if data transmission was interrupted and not
+	// all 40 bits were received
+	err = t.extractData(signals[:], buf)
+	if err != nil {
+		return err
+	}
+	// Compute checksum and compare it to the one in data. Abort if checksum is incorrect
+	if !isValid(buf[:]) {
+		return ChecksumError
+	}
+
+	// Extract temperature and humidity data from buffer
+	t.temperature, t.humidity = t.measurements.extractData(buf)
+	return nil
+}
+
+// receiveSignals counts number of low and high cycles. The execution is time critical, so the function disables
+// interrupts
+func receiveSignals(pin machine.Pin, result []counter) {
+	i := uint8(0)
+	mask := interrupt.Disable()
+	defer interrupt.Restore(mask)
+	for ; i < 40; i++ {
+		result[i*2] = expectChange(pin, false)
+		result[i*2+1] = expectChange(pin, true)
+	}
+}
+
+// extractData process signal counters and transforms them into bits.
+// if any of the bits were not received (timed-out), returns NoDataError
+func (t *device) extractData(signals []counter, buf []uint8) error {
+	for i := uint8(0); i < 40; i++ {
+		lowCycle := signals[i*2]
+		highCycle := signals[i*2+1]
+		if lowCycle == timeout || highCycle == timeout {
+			return NoDataError
+		}
+		byteN := i >> 3
+		buf[byteN] <<= 1
+		if highCycle > lowCycle {
+			buf[byteN] |= 1
+		}
+	}
+	return nil
+}
+
+// waitForDataTransmission waits for reply from the sensor.
+// If no reply received, returns NoSignalError.
+// For more details, see section 5.2 in [1]
+func waitForDataTransmission(p machine.Pin) error {
+	// wait for thermometer to pull down
+	if expectChange(p, true) == timeout {
+		return NoSignalError
+	}
+	//wait for thermometer to pull up
+	if expectChange(p, false) == timeout {
+		return NoSignalError
+	}
+	// wait for thermometer to pull down and start sending the data
+	if expectChange(p, true) == timeout {
+		return NoSignalError
+	}
+	return nil
+}
+
+// Constructor function for a DummyDevice implementation.
+// This device provides full control to the user.
+// It does not do any hidden measurements calls and does not check
+// for 2 seconds delay between measurements.
+func NewDummyDevice(pin machine.Pin, deviceType DeviceType) DummyDevice {
+	pin.High()
+	return &device{
+		pin:          pin,
+		measurements: deviceType,
+		initialized:  false,
+		temperature:  0,
+		humidity:     0,
+	}
+}

dht/timesafethermometer.go

@@ -0,0 +1,156 @@
+//go:build tinygo
+
+// Package dht provides a driver for DHTXX family temperature and humidity sensors.
+//
+// [1] Datasheet DHT11: https://www.mouser.com/datasheet/2/758/DHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf
+// [2] Datasheet DHT22: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf
+// Adafruit C++ driver: https://github.com/adafruit/DHT-sensor-library
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+import (
+	"machine"
+	"time"
+)
+
+// Device interface provides main functionality of the DHTXX sensors.
+type Device interface {
+	DummyDevice
+	Configure(policy UpdatePolicy)
+}
+
+// managedDevice struct provides time control and optional automatic data retrieval from the sensor.
+// It delegates all the functionality to device
+type managedDevice struct {
+	t          device
+	lastUpdate time.Time
+	policy     UpdatePolicy
+}
+
+// Measurements returns both measurements: temperature and humidity as they sent by the device.
+// Depending on the UpdatePolicy of the device may update cached measurements.
+func (m *managedDevice) Measurements() (temperature int16, humidity uint16, err error) {
+	err = m.checkForUpdateOnDataRequest()
+	if err != nil {
+		return 0, 0, err
+	}
+	return m.t.Measurements()
+}
+
+// Getter for temperature. Temperature method returns temperature as it is sent by device.
+// The temperature is measured temperature in Celsius multiplied by 10.
+// Depending on the UpdatePolicy of the device may update cached measurements.
+func (m *managedDevice) Temperature() (temp int16, err error) {
+	err = m.checkForUpdateOnDataRequest()
+	if err != nil {
+		return 0, err
+	}
+	temp, err = m.t.Temperature()
+	return
+}
+
+func (m *managedDevice) checkForUpdateOnDataRequest() (err error) {
+	// update if necessary
+	if m.policy.UpdateAutomatically {
+		err = m.ReadMeasurements()
+	}
+	// ignore error if the data was updated recently
+	// interface comparison does not work in tinygo. Therefore need to cast to explicit type
+	if code, ok := err.(ErrorCode); ok && code == UpdateError {
+		err = nil
+	}
+	// add error if the data is not initialized
+	if !m.t.initialized {
+		err = UninitializedDataError
+	}
+	return err
+}
+
+// Getter for temperature. TemperatureFloat returns temperature in a given scale.
+// Depending on the UpdatePolicy of the device may update cached measurements.
+func (m *managedDevice) TemperatureFloat(scale TemperatureScale) (float32, error) {
+	err := m.checkForUpdateOnDataRequest()
+	if err != nil {
+		return 0, err
+	}
+	return m.t.TemperatureFloat(scale)
+}
+
+// Getter for humidity. Humidity returns humidity as it is sent by device.
+// The humidity is measured in percentages multiplied by 10.
+// Depending on the UpdatePolicy of the device may update cached measurements.
+func (m *managedDevice) Humidity() (hum uint16, err error) {
+	err = m.checkForUpdateOnDataRequest()
+	if err != nil {
+		return 0, err
+	}
+	return m.t.Humidity()
+}
+
+// Getter for humidity. HumidityFloat returns humidity in percentages.
+// Depending on the UpdatePolicy of the device may update cached measurements.
+func (m *managedDevice) HumidityFloat() (float32, error) {
+	err := m.checkForUpdateOnDataRequest()
+	if err != nil {
+		return 0, err
+	}
+	return m.t.HumidityFloat()
+}
+
+// ReadMeasurements reads data from the sensor.
+// The function will return UpdateError if it is called more frequently than specified in UpdatePolicy
+func (m *managedDevice) ReadMeasurements() (err error) {
+	timestamp := time.Now()
+	if !m.t.initialized || timestamp.Sub(m.lastUpdate) > m.policy.UpdateTime {
+		err = m.t.ReadMeasurements()
+	} else {
+		err = UpdateError
+	}
+	if err == nil {
+		m.lastUpdate = timestamp
+	}
+	return
+}
+
+// Configure configures UpdatePolicy for Device.
+// Configure checks for policy.UpdateTime and prevent from updating more frequently than specified in [1][2]
+// to prevent undefined behaviour of the sensor.
+func (m *managedDevice) Configure(policy UpdatePolicy) {
+	if policy.UpdateAutomatically && policy.UpdateTime < time.Second*2 {
+		policy.UpdateTime = time.Second * 2
+	}
+	m.policy = policy
+}
+
+// Constructor of the Device implementation.
+// This implementation updates data every 2 seconds during data access.
+func New(pin machine.Pin, deviceType DeviceType) Device {
+	pin.High()
+	return &managedDevice{
+		t: device{
+			pin:          pin,
+			measurements: deviceType,
+			initialized:  false,
+		},
+		lastUpdate: time.Time{},
+		policy: UpdatePolicy{
+			UpdateTime:          time.Second * 2,
+			UpdateAutomatically: true,
+		},
+	}
+}
+
+// Constructor of the Device implementation with given UpdatePolicy
+func NewWithPolicy(pin machine.Pin, deviceType DeviceType, updatePolicy UpdatePolicy) Device {
+	pin.High()
+	result := &managedDevice{
+		t: device{
+			pin:          pin,
+			measurements: deviceType,
+			initialized:  false,
+		},
+		lastUpdate: time.Time{},
+	}
+	result.Configure(updatePolicy)
+	return result
+}

dht/util.go

@@ -0,0 +1,36 @@
+//go:build tinygo
+
+package dht // import "tinygo.org/x/drivers/dht"
+
+import (
+	"machine"
+	"time"
+)
+
+// Check if the pin is disabled
+func powerUp(p machine.Pin) bool {
+	state := p.Get()
+	if !state {
+		p.High()
+		time.Sleep(startTimeout)
+	}
+	return state
+}
+
+func expectChange(p machine.Pin, oldState bool) counter {
+	cnt := counter(0)
+	for ; p.Get() == oldState && cnt != timeout; cnt++ {
+	}
+	return cnt
+}
+
+func checksum(buf []uint8) uint8 {
+	return buf[4]
+}
+func computeChecksum(buf []uint8) uint8 {
+	return buf[0] + buf[1] + buf[2] + buf[3]
+}
+
+func isValid(buf []uint8) bool {
+	return checksum(buf) == computeChecksum(buf)
+}

drivers.go

@@ -3,22 +3,22 @@
 //
 // Here is an example in TinyGo that uses the BMP180 digital barometer:
 //
-// 	package main
+//	package main
 //
-// 	import (
+//	import (
 //		"time"
 //		"machine"
 //
-// 		"tinygo.org/x/drivers/bmp180"
-// 	)
+//		"tinygo.org/x/drivers/bmp180"
+//	)
 //
-// 	func main() {
+//	func main() {
 //		machine.I2C0.Configure(machine.I2CConfig{})
 //		sensor := bmp180.New(machine.I2C0)
 //		sensor.Configure()
 //
-// 		connected := sensor.Connected()
-// 		if !connected {
+//		connected := sensor.Connected()
+//		if !connected {
 //			println("BMP180 not detected")
 //			return
 //		}
@@ -38,5 +38,4 @@
 // Each individual driver is contained within its own sub-package within this package and
 // there are no interdependencies in order to minimize the final size of compiled code that
 // uses any of these drivers.
-//
 package drivers // import "tinygo.org/x/drivers"

ds1307/ds1307.go

@@ -2,7 +2,6 @@
 //
 // Datasheet:
 // https://datasheets.maximintegrated.com/en/ds/DS1307.pdf
-//
 package ds1307 // import "tinygo.org/x/drivers/ds1307"
 
 import (
@@ -42,8 +41,8 @@ func (d *Device) SetTime(t time.Time) error {
 	return err
 }
 
-// Time returns the time and date
-func (d *Device) Time() (time.Time, error) {
+// ReadTime returns the date and time
+func (d *Device) ReadTime() (time.Time, error) {
 	data := make([]byte, 8)
 	err := d.bus.ReadRegister(d.Address, uint8(TimeDate), data)
 	if err != nil {

easystepper/easystepper.go

@@ -2,28 +2,76 @@
 package easystepper // import "tinygo.org/x/drivers/easystepper"
 
 import (
+	"errors"
 	"machine"
 	"time"
 )
 
+// StepMode determines the coil sequence used to perform a single step
+type StepMode uint8
+
+// Valid values for StepMode
+const (
+	// ModeFour uses a 'four step' coil sequence (12-23-34-41). This is the default (zero-value) mode
+	ModeFour StepMode = iota
+	// ModeEight uses an 'eight step' coil sequence (1-12-2-23-3-34-4-41)
+	ModeEight
+)
+
+// stepCount is a helper function to return the number of steps in a StepMode sequence
+func (sm StepMode) stepCount() uint {
+	switch sm {
+	default:
+		fallthrough
+	case ModeFour:
+		return 4
+	case ModeEight:
+		return 8
+	}
+}
+
+// DeviceConfig contains the configuration data for a single easystepper driver
+type DeviceConfig struct {
+	// Pin1 ... Pin4 determines the pins to configure and use for the device
+	Pin1, Pin2, Pin3, Pin4 machine.Pin
+	// StepCount is the number of steps required to perform a full revolution of the stepper motor
+	StepCount uint
+	// RPM determines the speed of the stepper motor in 'Revolutions per Minute'
+	RPM uint
+	// Mode determines the coil sequence used to perform a single step
+	Mode StepMode
+}
+
+// DualDeviceConfig contains the configuration data for a dual easystepper driver
+type DualDeviceConfig struct {
+	DeviceConfig
+	// Pin5 ... Pin8 determines the pins to configure and use for the second device
+	Pin5, Pin6, Pin7, Pin8 machine.Pin
+}
+
 // Device holds the pins and the delay between steps
 type Device struct {
 	pins       [4]machine.Pin
-	stepDelay  int32
+	stepDelay  time.Duration
 	stepNumber uint8
+	stepMode   StepMode
 }
 
 // DualDevice holds information for controlling 2 motors
 type DualDevice struct {
-	devices [2]Device
+	devices [2]*Device
 }
 
-// New returns a new easystepper driver given 4 pins, number of steps and rpm
-func New(pin1, pin2, pin3, pin4 machine.Pin, steps int32, rpm int32) Device {
-	return Device{
-		pins:      [4]machine.Pin{pin1, pin2, pin3, pin4},
-		stepDelay: 60000000 / (steps * rpm),
+// New returns a new single easystepper driver given a DeviceConfig
+func New(config DeviceConfig) (*Device, error) {
+	if config.StepCount == 0 || config.RPM == 0 {
+		return nil, errors.New("config.StepCount and config.RPM must be > 0")
 	}
+	return &Device{
+		pins:      [4]machine.Pin{config.Pin1, config.Pin2, config.Pin3, config.Pin4},
+		stepDelay: time.Second * 60 / time.Duration((config.StepCount * config.RPM)),
+		stepMode:  config.Mode,
+	}, nil
 }
 
 // Configure configures the pins of the Device
@@ -34,17 +82,23 @@ func (d *Device) Configure() {
 }
 
 // NewDual returns a new dual easystepper driver given 8 pins, number of steps and rpm
-func NewDual(pin1, pin2, pin3, pin4, pin5, pin6, pin7, pin8 machine.Pin, steps int32, rpm int32) DualDevice {
-	var dual DualDevice
-	dual.devices[0] = Device{
-		pins:      [4]machine.Pin{pin1, pin2, pin3, pin4},
-		stepDelay: 60000000 / (steps * rpm),
+func NewDual(config DualDeviceConfig) (*DualDevice, error) {
+	// Create the first device
+	dev1, err := New(config.DeviceConfig)
+	if err != nil {
+		return nil, err
 	}
-	dual.devices[1] = Device{
-		pins:      [4]machine.Pin{pin5, pin6, pin7, pin8},
-		stepDelay: 60000000 / (steps * rpm),
+	// Create the second device
+	config.DeviceConfig.Pin1 = config.Pin5
+	config.DeviceConfig.Pin2 = config.Pin6
+	config.DeviceConfig.Pin3 = config.Pin7
+	config.DeviceConfig.Pin4 = config.Pin8
+	dev2, err := New(config.DeviceConfig)
+	if err != nil {
+		return nil, err
 	}
-	return dual
+	// Return composite dual device
+	return &DualDevice{devices: [2]*Device{dev1, dev2}}, nil
 }
 
 // Configure configures the pins of the DualDevice
@@ -64,7 +118,7 @@ func (d *Device) Move(steps int32) {
 	var s int32
 	d.stepMotor(d.stepNumber)
 	for s = int32(d.stepNumber); s < steps; s++ {
-		time.Sleep(time.Duration(d.stepDelay) * time.Microsecond)
+		time.Sleep(d.stepDelay)
 		d.moveDirectionSteps(direction, s)
 	}
 }
@@ -101,7 +155,7 @@ func (d *DualDevice) Move(stepsA, stepsB int32) {
 	stepsA += int32(d.devices[max].stepNumber)
 	minStep = int32(d.devices[min].stepNumber)
 	for s := int32(d.devices[max].stepNumber); s < stepsA; s++ {
-		time.Sleep(time.Duration(d.devices[0].stepDelay) * time.Microsecond)
+		time.Sleep(d.devices[0].stepDelay)
 		d.devices[max].moveDirectionSteps(directions[max], s)
 
 		if ((s * stepsB) / stepsA) > minStep {
@@ -119,6 +173,18 @@ func (d *DualDevice) Off() {
 
 // stepMotor changes the pins' state to the correct step
 func (d *Device) stepMotor(step uint8) {
+	switch d.stepMode {
+	default:
+		fallthrough
+	case ModeFour:
+		d.stepMotor4(step)
+	case ModeEight:
+		d.stepMotor8(step)
+	}
+}
+
+// stepMotor4 changes the pins' state to the correct step in 4-step mode
+func (d *Device) stepMotor4(step uint8) {
 	switch step {
 	case 0:
 		d.pins[0].High()
@@ -148,13 +214,63 @@ func (d *Device) stepMotor(step uint8) {
 	d.stepNumber = step
 }
 
+// stepMotor8 changes the pins' state to the correct step in 8-step mode
+func (d *Device) stepMotor8(step uint8) {
+	switch step {
+	case 0:
+		d.pins[0].High()
+		d.pins[2].Low()
+		d.pins[1].Low()
+		d.pins[3].Low()
+	case 1:
+		d.pins[0].High()
+		d.pins[2].High()
+		d.pins[1].Low()
+		d.pins[3].Low()
+	case 2:
+		d.pins[0].Low()
+		d.pins[2].High()
+		d.pins[1].Low()
+		d.pins[3].Low()
+	case 3:
+		d.pins[0].Low()
+		d.pins[2].High()
+		d.pins[1].High()
+		d.pins[3].Low()
+	case 4:
+		d.pins[0].Low()
+		d.pins[2].Low()
+		d.pins[1].High()
+		d.pins[3].Low()
+	case 5:
+		d.pins[0].Low()
+		d.pins[2].Low()
+		d.pins[1].High()
+		d.pins[3].High()
+	case 6:
+		d.pins[0].Low()
+		d.pins[2].Low()
+		d.pins[1].Low()
+		d.pins[3].High()
+	case 7:
+		d.pins[0].High()
+		d.pins[2].Low()
+		d.pins[1].Low()
+		d.pins[3].High()
+	}
+	d.stepNumber = step
+}
+
 // moveDirectionSteps uses the direction to calculate the correct step and change the motor to it.
-// Direction true: 0, 1, 2, 3, 0, 1, 2, ...
-// Direction false: 0, 3, 2, 1, 0, 3, 2, ...
+// Direction true:  (4-step mode) 0, 1, 2, 3, 0, 1, 2, ...
+// Direction false: (4-step mode) 0, 3, 2, 1, 0, 3, 2, ...
+// Direction true:  (8-step mode) 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, ...
+// Direction false: (8-step mode) 0, 7, 6, 5, 4, 3, 2, 1, 0, 7, 6, ...
 func (d *Device) moveDirectionSteps(direction bool, step int32) {
+	modulus := int32(d.stepMode.stepCount())
 	if direction {
-		d.stepMotor(uint8(step % 4))
+		d.stepMotor(uint8(step % modulus))
 	} else {
-		d.stepMotor(uint8((step + 2*(step%2)) % 4))
+		d.stepMotor(uint8(((-step % modulus) + modulus) % modulus))
 	}
 }

espat/adapter.go

@@ -0,0 +1,20 @@
+package espat
+
+import (
+	"time"
+
+	"tinygo.org/x/drivers/net"
+)
+
+func (d *Device) ConnectToAccessPoint(ssid, pass string, timeout time.Duration) error {
+	if len(ssid) == 0 {
+		return net.ErrWiFiMissingSSID
+	}
+
+	d.SetWifiMode(WifiModeClient)
+	return d.ConnectToAP(ssid, pass, int(timeout.Seconds()))
+}
+
+func (d *Device) Disconnect() error {
+	return d.DisconnectFromAP()
+}

espat/espat.go

@@ -15,22 +15,21 @@
 //
 // AT command set:
 // https://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
-//
 package espat // import "tinygo.org/x/drivers/espat"
 
 import (
 	"errors"
-	"machine"
 	"strconv"
 	"strings"
 	"time"
 
+	"tinygo.org/x/drivers"
 	"tinygo.org/x/drivers/net"
 )
 
 // Device wraps UART connection to the ESP8266/ESP32.
 type Device struct {
-	bus machine.UART
+	bus drivers.UART
 
 	// command responses that come back from the ESP8266/ESP32
 	response []byte
@@ -43,7 +42,7 @@ type Device struct {
 var ActiveDevice *Device
 
 // New returns a new espat driver. Pass in a fully configured UART bus.
-func New(b machine.UART) *Device {
+func New(b drivers.UART) *Device {
 	return &Device{bus: b, response: make([]byte, 512), socketdata: make([]byte, 0, 1024)}
 }
 

espat/tcp.go

@@ -29,7 +29,7 @@ func (d *Device) GetDNS(domain string) (string, error) {
 		return "", errors.New("Invalid domain lookup result")
 	}
 	res := strings.Split(r[1], "\r\n")
-	return res[0], nil
+	return strings.Trim(res[0], `"`), nil
 }
 
 // ConnectTCPSocket creates a new TCP socket connection for the ESP8266/ESP32.

examples/adt7410/main.go

@@ -9,7 +9,7 @@ import (
 )
 
 var (
-	i2c    = &machine.I2C0
+	i2c    = machine.I2C0
 	sensor = adt7410.New(i2c)
 )
 

examples/aht20/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/aht20"
+)
+
+func main() {
+	machine.I2C0.Configure(machine.I2CConfig{})
+
+	dev := aht20.New(machine.I2C0)
+	dev.Configure()
+
+	dev.Reset()
+	for {
+		time.Sleep(500 * time.Millisecond)
+
+		err := dev.Read()
+		if err != nil {
+			println("Error", err)
+			continue
+		}
+
+		println("temp    ", fmtD(dev.DeciCelsius(), 3, 1), "C")
+		println("humidity", fmtD(dev.DeciRelHumidity(), 3, 1), "%")
+	}
+}
+
+func fmtD(val int32, i int, f int) string {
+	result := make([]byte, i+f+1)
+	neg := false
+
+	if val < 0 {
+		val = -val
+		neg = true
+	}
+
+	for p := len(result) - 1; p >= 0; p-- {
+		result[p] = byte(int32('0') + (val % 10))
+		val = val / 10
+
+		if p == i+1 && p > 0 {
+			p--
+			result[p] = '.'
+		}
+	}
+
+	if neg {
+		result[0] = '-'
+	}
+
+	return string(result)
+}

examples/apa102/itsybitsy-m0/main.go

@@ -13,9 +13,9 @@ import (
 )
 
 var (
-	apa apa102.Device
+	apa *apa102.Device
 
-	led   = machine.PWM{machine.LED}
+	pwm   = machine.TCC0
 	leds  = make([]color.RGBA, 1)
 	wheel = &Wheel{Brightness: 0x10}
 )
@@ -27,12 +27,19 @@ func init() {
 	apa = apa102.NewSoftwareSPI(machine.PA00, machine.PA01, 1)
 
 	// Configure the regular on-board LED for PWM fading
-	machine.InitPWM()
-	led.Configure()
-
+	err := pwm.Configure(machine.PWMConfig{})
+	if err != nil {
+		println("failed to configure PWM")
+		return
+	}
 }
 
 func main() {
+	channelLED, err := pwm.Channel(machine.LED)
+	if err != nil {
+		println("failed to configure LED PWM channel")
+		return
+	}
 
 	// We'll fade the on-board LED in a goroutine to show/ensure that the APA102
 	// works fine with the scheduler enabled.  Comment this out to test this code
@@ -43,11 +50,11 @@ func main() {
 				brightening = !brightening
 				continue
 			}
-			var brightness uint16 = uint16(i) << 8
+			var brightness uint32 = uint32(i)
 			if !brightening {
-				brightness = 0xFFFF - brightness
+				brightness = 256 - brightness
 			}
-			led.Set(brightness)
+			pwm.Set(channelLED, pwm.Top()*brightness/256)
 			time.Sleep(5 * time.Millisecond)
 		}
 	}()

examples/apds9960/color/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/apds9960"
+)
+
+func main() {
+
+	// use Nano 33 BLE Sense's internal I2C bus
+	machine.I2C1.Configure(machine.I2CConfig{
+		SCL:       machine.SCL1_PIN,
+		SDA:       machine.SDA1_PIN,
+		Frequency: machine.TWI_FREQ_400KHZ,
+	})
+
+	sensor := apds9960.New(machine.I2C1)
+
+	sensor.Configure(apds9960.Configuration{}) // use default settings
+
+	if !sensor.Connected() {
+		println("APDS-9960 not connected!")
+		return
+	}
+
+	sensor.EnableColor() // enable color engine
+
+	for {
+
+		if sensor.ColorAvailable() {
+			r, g, b, c := sensor.ReadColor()
+			println("Red =", r, "\tGreen =", g, "\tBlue =", b, "\tClear =", c)
+		}
+		time.Sleep(time.Millisecond * 100)
+	}
+
+}

examples/apds9960/gesture/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/apds9960"
+)
+
+func main() {
+
+	// use Nano 33 BLE Sense's internal I2C bus
+	machine.I2C1.Configure(machine.I2CConfig{
+		SCL:       machine.SCL1_PIN,
+		SDA:       machine.SDA1_PIN,
+		Frequency: machine.TWI_FREQ_400KHZ,
+	})
+
+	sensor := apds9960.New(machine.I2C1)
+
+	sensor.Configure(apds9960.Configuration{}) // use default settings
+
+	if !sensor.Connected() {
+		println("APDS-9960 not connected!")
+		return
+	}
+
+	sensor.EnableGesture() // enable gesture engine
+
+	for {
+
+		// wave your hand (not too slow) about 10 cm above the sensor
+		if sensor.GestureAvailable() {
+
+			gesture := sensor.ReadGesture()
+			print("Detected gesture: ")
+			switch gesture {
+			case apds9960.GESTURE_UP: // the nRF52 chip is "up"
+				println("Up")
+			case apds9960.GESTURE_DOWN:
+				println("Down")
+			case apds9960.GESTURE_LEFT:
+				println("Left")
+			case apds9960.GESTURE_RIGHT:
+				println("Right")
+			}
+		}
+		// note: the delay shouldn't be too long, otherwise new gesture data might be lost
+		time.Sleep(time.Millisecond * 250)
+	}
+
+}

examples/apds9960/proximity/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/apds9960"
+)
+
+func main() {
+
+	// use Nano 33 BLE Sense's internal I2C bus
+	machine.I2C1.Configure(machine.I2CConfig{
+		SCL:       machine.SCL1_PIN,
+		SDA:       machine.SDA1_PIN,
+		Frequency: machine.TWI_FREQ_400KHZ,
+	})
+
+	sensor := apds9960.New(machine.I2C1)
+
+	// use default settings
+	sensor.Configure(apds9960.Configuration{})
+
+	if !sensor.Connected() {
+		println("APDS-9960 not connected!")
+		return
+	}
+
+	sensor.EnableProximity() // enable proximity engine
+
+	for {
+
+		if sensor.ProximityAvailable() {
+			p := sensor.ReadProximity()
+			println("Proximity:", p)
+		}
+		time.Sleep(time.Millisecond * 100)
+	}
+
+}

examples/ateccx08/lock/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"machine"
+
+	"encoding/hex"
+	"time"
+
+	"tinygo.org/x/drivers/ateccx08"
+)
+
+func main() {
+	time.Sleep(5 * time.Second)
+	println("Looking for ATECCx08...")
+
+	machine.I2C0.Configure(machine.I2CConfig{})
+
+	atecc := ateccx08.New(machine.I2C0)
+	atecc.Configure()
+
+	if !atecc.Connected() {
+		for {
+			println("could not connect to ATECCx08")
+			time.Sleep(time.Second)
+		}
+	}
+
+	version, _ := atecc.Version()
+
+	println(version.String(), "started")
+
+	if !atecc.IsLocked() {
+		for i := 10; i > 0; i-- {
+			println(version.String(), "is not locked. Locking in", i, "seconds...")
+			time.Sleep(time.Second)
+		}
+
+		// locks the Configuration zone... PERMANENTLY!
+		atecc.Lock(0)
+	}
+
+	println(version.String(), "locked.")
+
+	for {
+		data, err := atecc.Random()
+		if err != nil {
+			println(err)
+		}
+
+		println(hex.EncodeToString(data[:]))
+		time.Sleep(500 * time.Millisecond)
+	}
+}

examples/ateccx08/random/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"machine"
+
+	"crypto/rand"
+	"encoding/hex"
+	"time"
+
+	"tinygo.org/x/drivers/ateccx08"
+)
+
+var atecc *ateccx08.Device
+
+func main() {
+	time.Sleep(5 * time.Second)
+	println("Looking for ATECCx08...")
+
+	machine.I2C0.Configure(machine.I2CConfig{})
+
+	atecc = ateccx08.New(machine.I2C0)
+	atecc.Configure()
+
+	if !atecc.Connected() {
+		for {
+			println("could not connect to ATECCx08")
+			time.Sleep(time.Second)
+		}
+	}
+
+	version, _ := atecc.Version()
+
+	println(version.String(), "started")
+
+	if !atecc.IsLocked() {
+		for {
+			println(version.String(), "is not locked. Random numbers will not actually be random.")
+			time.Sleep(time.Second)
+		}
+	}
+
+	var result [13]byte
+	for {
+		rand.Read(result[:])
+		encodedString := hex.EncodeToString(result[:])
+		println(encodedString)
+		time.Sleep(500 * time.Millisecond)
+	}
+}

examples/ateccx08/random/rand.go

@@ -0,0 +1,52 @@
+// connects the Go crypto/rand package to the random number generation
+// on the ATECCx08 cryptographic processor.
+package main
+
+import (
+	"crypto/rand"
+	"errors"
+)
+
+var (
+	errNoATECC = errors.New("no ATECCx08")
+)
+
+func init() {
+	rand.Reader = &reader{}
+}
+
+type reader struct{}
+
+func (r *reader) Read(b []byte) (n int, err error) {
+	if len(b) == 0 {
+		return
+	}
+
+	if atecc == nil {
+		return 0, errNoATECC
+	}
+
+	if !atecc.IsLocked() {
+		panic("ATECCx08 is not locked and cannot produce random numbers!")
+	}
+
+	rnds, err := atecc.Random()
+	if err != nil {
+		return 0, err
+	}
+
+	for i := 0; i < len(b); i += 32 {
+		if i+32 > len(b) {
+			copy(b[i:], rnds[:(len(b)-i)])
+			break
+		}
+
+		copy(b[i:], rnds[:])
+		rnds, err = atecc.Random()
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	return len(b), nil
+}

examples/axp192/m5stack-core2-blinky/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	axp192 "tinygo.org/x/drivers/axp192/m5stack-core2-axp192"
+	"tinygo.org/x/drivers/i2csoft"
+)
+
+func main() {
+	i2c := i2csoft.New(machine.SCL0_PIN, machine.SDA0_PIN)
+	i2c.Configure(i2csoft.I2CConfig{Frequency: 100e3})
+
+	axp := axp192.New(i2c)
+	led := axp.LED
+
+	for {
+		led.Low()
+		time.Sleep(time.Millisecond * 500)
+
+		led.High()
+		time.Sleep(time.Millisecond * 500)
+	}
+}

examples/bmp388/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"machine"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers/bmp388"
+)
+
+func main() {
+
+	machine.I2C0.Configure(machine.I2CConfig{})
+
+	sensor := bmp388.New(machine.I2C0)
+	if !sensor.Connected() {
+		println("Uh oh, BMP388 not detected")
+		return
+	}
+
+	// The accuracy of the sensor can be increased, at the cost of a slower output rate. Table 9 in Section 3.5 of the
+	// datasheet has recommended settings for common use cases. If increasing the sampling rate, the output data rate
+	// (ODR) will likely have to be decreased. Configure() will return an error if there's a problem with the
+	// configuration settings - keep decreasing the ODR and cycling the power to the sensor until it is happy.
+	err := sensor.Configure(bmp388.Config{
+		Pressure:    bmp388.Sampling8X,
+		Temperature: bmp388.Sampling2X,
+		ODR:         bmp388.Odr25,
+		IIR:         bmp388.Coeff0,
+		Mode:        bmp388.Normal,
+	})
+
+	// This is also fine
+	// err := sensor.Configure(bmp388.BMP388Config{})
+
+	if err != nil {
+		println(err)
+	}
+
+	for {
+		temp, err := sensor.ReadTemperature() // returns the temperature in centicelsius
+		press, err := sensor.ReadPressure()   // returns the pressure in centipascals
+
+		if err != nil {
+			println(err)
+		} else {
+			println("Temperature: " + strconv.FormatInt(int64(temp), 10) + " cC")
+			println("Pressure:    " + strconv.FormatInt(int64(press), 10) + " cPa\n")
+		}
+
+		time.Sleep(time.Second)
+	}
+}

examples/dht/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"machine"
+	"time"
+	"tinygo.org/x/drivers/dht"
+)
+
+func main() {
+	pin := machine.D6
+	dhtSensor := dht.New(pin, dht.DHT11)
+	for {
+		temp, hum, err := dhtSensor.Measurements()
+		if err == nil {
+			fmt.Printf("Temperature: %02d.%d°C, Humidity: %02d.%d%%\n", temp/10, temp%10, hum/10, hum%10)
+		} else {
+			fmt.Printf("Could not take measurements from the sensor: %s\n", err.Error())
+		}
+		// Measurements cannot be updated only 2 seconds. More frequent calls will return the same value
+		time.Sleep(time.Second * 2)
+	}
+}

examples/ds1307/time/main.go

@@ -13,7 +13,7 @@ func main() {
 	rtc.SetTime(time.Date(2019, 5, 15, 20, 34, 12, 0, time.UTC))
 
 	for {
-		t, err := rtc.Time()
+		t, err := rtc.ReadTime()
 		if err != nil {
 			println("Error reading date:", err)
 			break

examples/easystepper/main.go

@@ -8,7 +8,11 @@ import (
 )
 
 func main() {
-	motor := easystepper.New(machine.P13, machine.P15, machine.P14, machine.P16, 200, 75)
+	config := easystepper.DeviceConfig{
+		Pin1: machine.P13, Pin2: machine.P15, Pin3: machine.P14, Pin4: machine.P16,
+		StepCount: 200, RPM: 75, Mode: easystepper.ModeFour,
+	}
+	motor, _ := easystepper.New(config)
 	motor.Configure()
 
 	for {

examples/espat/espconsole/main.go

@@ -6,7 +6,6 @@
 //
 // More information on the Espressif AT command set at:
 // https://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
-//
 package main
 
 import (
@@ -19,9 +18,11 @@ import (
 // change actAsAP to true to act as an access point instead of connecting to one.
 const actAsAP = false
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // these are the default pins for the Arduino Nano33 IoT.
 // change these to connect to a different UART or pins for the ESP8266/ESP32
@@ -30,7 +31,7 @@ var (
 	tx   = machine.PA22
 	rx   = machine.PA23
 
-	console = machine.UART0
+	console = machine.Serial
 
 	adaptor *espat.Device
 )
@@ -113,8 +114,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/espat/esphub/main.go

@@ -3,7 +3,6 @@
 //
 // In other words:
 // Your computer <--> UART0 <--> MCU <--> UART1 <--> ESP8266 <--> INTERNET
-//
 package main
 
 import (
@@ -17,9 +16,11 @@ import (
 // change actAsAP to true to act as an access point instead of connecting to one.
 const actAsAP = false
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // these are the default pins for the Arduino Nano33 IoT.
 // change these to connect to a different UART or pins for the ESP8266/ESP32
@@ -99,8 +100,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/espat/espstation/main.go

@@ -3,7 +3,6 @@
 //
 // In other words:
 // Your computer <--> UART0 <--> MCU <--> UART1 <--> ESP8266
-//
 package main
 
 import (
@@ -14,9 +13,11 @@ import (
 	"tinygo.org/x/drivers/net"
 )
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // IP address of the listener aka "hub". Replace with your own info.
 const hubIP = "0.0.0.0"
@@ -88,8 +89,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/espat/mqttclient/main.go

@@ -7,8 +7,7 @@
 //
 // You must install the Paho MQTT package to build this program:
 //
-// 		go get -u github.com/eclipse/paho.mqtt.golang
-//
+//	go get -u github.com/eclipse/paho.mqtt.golang
 package main
 
 import (
@@ -20,9 +19,11 @@ import (
 	"tinygo.org/x/drivers/net/mqtt"
 )
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // IP address of the MQTT broker to use. Replace with your own info.
 const server = "tcp://test.mosquitto.org:1883"
@@ -36,7 +37,7 @@ var (
 	tx   = machine.PA22
 	rx   = machine.PA23
 
-	console = machine.UART0
+	console = machine.Serial
 
 	adaptor *espat.Device
 	topic   = "tinygo"
@@ -108,8 +109,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/espat/mqttsub/main.go

@@ -7,8 +7,7 @@
 //
 // You must also install the Paho MQTT package to build this program:
 //
-// 		go get -u github.com/eclipse/paho.mqtt.golang
-//
+//	go get -u github.com/eclipse/paho.mqtt.golang
 package main
 
 import (
@@ -21,9 +20,11 @@ import (
 	"tinygo.org/x/drivers/net/mqtt"
 )
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // IP address of the MQTT broker to use. Replace with your own info.
 //const server = "tcp://test.mosquitto.org:1883"
@@ -37,7 +38,7 @@ var (
 	tx   = machine.PA22
 	rx   = machine.PA23
 
-	console = machine.UART0
+	console = machine.Serial
 
 	adaptor *espat.Device
 	cl      mqtt.Client
@@ -129,8 +130,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/espat/tcpclient/main.go

@@ -3,7 +3,6 @@
 //
 // In other words:
 // Your computer <--> UART0 <--> MCU <--> UART1 <--> ESP8266
-//
 package main
 
 import (
@@ -14,9 +13,11 @@ import (
 	"tinygo.org/x/drivers/net"
 )
 
-// access point info
-const ssid = "YOURSSID"
-const pass = "YOURPASS"
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // IP address of the server aka "hub". Replace with your own info.
 const serverIP = "0.0.0.0"
@@ -91,8 +92,9 @@ func connectToESP() bool {
 func connectToAP() {
 	println("Connecting to wifi network '" + ssid + "'")
 
-	adaptor.SetWifiMode(espat.WifiModeClient)
-	adaptor.ConnectToAP(ssid, pass, 10)
+	if err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second); err != nil {
+		failMessage(err.Error())
+	}
 
 	println("Connected.")
 	ip, err := adaptor.GetClientIP()

examples/flash/console/console_example.go

@@ -20,7 +20,7 @@ var (
 	input [consoleBufLen]byte
 	store [storageBufLen]byte
 
-	console = machine.UART0
+	console = machine.Serial
 
 	dev *flash.Device
 

examples/ft6336/basic/m5stack_core2.go

@@ -0,0 +1,23 @@
+//go:build m5stack_core2
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ft6336"
+	"tinygo.org/x/drivers/i2csoft"
+	"tinygo.org/x/drivers/touch"
+)
+
+// InitDisplay initializes the display of each board.
+func initDevices() (touch.Pointer, error) {
+	i2c := i2csoft.New(machine.SCL0_PIN, machine.SDA0_PIN)
+	i2c.Configure(i2csoft.I2CConfig{Frequency: 100e3})
+
+	resistiveTouch := ft6336.New(i2c, machine.Pin(39))
+	resistiveTouch.Configure(ft6336.Config{})
+	resistiveTouch.SetPeriodActive(0x00)
+
+	return resistiveTouch, nil
+}

examples/ft6336/basic/main.go

@@ -0,0 +1,16 @@
+package main
+
+func main() {
+	touchScreen, _ := initDevices()
+
+	for {
+		touch := touchScreen.ReadTouchPoint()
+		if touch.Z > 0 {
+			//X and Y are 16 bit with 12 bit resolution and need to be scaled for the display size
+			//Z is 24 bit and is typically > 2000 for a touch
+			println("touch:", touch.X, touch.Y, touch.Z)
+			//Example of scaling for m5stack-core2's 320x240 display with 320x270 touch area
+			println("screen:", (touch.X*320)>>16, (touch.Y*270)>>16)
+		}
+	}
+}

examples/ft6336/touchpaint/m5stack_core2.go

@@ -0,0 +1,54 @@
+//go:build m5stack_core2
+
+package main
+
+import (
+	"image/color"
+	"machine"
+
+	axp192 "tinygo.org/x/drivers/axp192/m5stack-core2-axp192"
+	"tinygo.org/x/drivers/ft6336"
+	"tinygo.org/x/drivers/i2csoft"
+	"tinygo.org/x/drivers/ili9341"
+	"tinygo.org/x/drivers/touch"
+)
+
+// InitDisplay initializes the display of each board.
+func initDevices() (touchPaintDisplay, touch.Pointer, error) {
+	machine.SPI2.Configure(machine.SPIConfig{
+		SCK:       machine.LCD_SCK_PIN,
+		SDO:       machine.LCD_SDO_PIN,
+		SDI:       machine.LCD_SDI_PIN,
+		Frequency: 40e6,
+	})
+
+	i2c := i2csoft.New(machine.SCL0_PIN, machine.SDA0_PIN)
+	i2c.Configure(i2csoft.I2CConfig{Frequency: 100e3})
+
+	axp := axp192.New(i2c)
+	led := axp.LED
+	led.Low()
+
+	display := ili9341.NewSPI(
+		machine.SPI2,
+		machine.LCD_DC_PIN,
+		machine.LCD_SS_PIN,
+		machine.NoPin,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{
+		Width:            320,
+		Height:           240,
+		DisplayInversion: true,
+	})
+	display.FillScreen(color.RGBA{255, 255, 255, 255})
+
+	display.SetRotation(ili9341.Rotation0Mirror)
+
+	resistiveTouch := ft6336.New(i2c, machine.Pin(39))
+	resistiveTouch.Configure(ft6336.Config{})
+	resistiveTouch.SetPeriodActive(0x00)
+
+	return display, resistiveTouch, nil
+}

examples/ft6336/touchpaint/main.go

@@ -0,0 +1,163 @@
+package main
+
+import (
+	"image/color"
+	"math"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/touch"
+)
+
+type touchPaintDisplay interface {
+	drivers.Displayer
+	FillRectangle(x, y, width, height int16, c color.RGBA) error
+	DrawRectangle(x, y, w, h int16, c color.RGBA) error
+}
+
+var (
+	white   = color.RGBA{255, 255, 255, 255}
+	black   = color.RGBA{0, 0, 0, 255}
+	red     = color.RGBA{255, 0, 0, 255}
+	green   = color.RGBA{0, 255, 0, 255}
+	blue    = color.RGBA{0, 0, 255, 255}
+	magenta = color.RGBA{255, 0, 255, 255}
+	yellow  = color.RGBA{255, 255, 0, 255}
+	cyan    = color.RGBA{0, 255, 255, 255}
+
+	oldColor     color.RGBA
+	currentColor color.RGBA
+)
+
+const (
+	penRadius = 3
+	boxSize   = 30
+
+	Xmin = 0
+	Xmax = 0xFFFF
+	Ymin = 0
+	Ymax = 0xFFFF
+)
+
+func main() {
+	display, resistiveTouch, _ := initDevices()
+
+	// fill the background and activate the backlight
+	width, height := display.Size()
+	display.FillRectangle(0, 0, width, height, black)
+
+	// make color selection boxes
+	display.FillRectangle(0, 0, boxSize, boxSize, red)
+	display.FillRectangle(boxSize, 0, boxSize, boxSize, yellow)
+	display.FillRectangle(boxSize*2, 0, boxSize, boxSize, green)
+	display.FillRectangle(boxSize*3, 0, boxSize, boxSize, cyan)
+	display.FillRectangle(boxSize*4, 0, boxSize, boxSize, blue)
+	display.FillRectangle(boxSize*5, 0, boxSize, boxSize, magenta)
+	display.FillRectangle(boxSize*6, 0, boxSize, boxSize, black)
+	display.FillRectangle(boxSize*7, 0, boxSize, boxSize, white)
+
+	// set the initial color to red and draw a box to highlight it
+	oldColor = red
+	currentColor = red
+	display.DrawRectangle(0, 0, boxSize, boxSize, white)
+
+	last := touch.Point{}
+
+	// loop and poll for touches, including performing debouncing
+	debounce := 0
+	for {
+
+		point := resistiveTouch.ReadTouchPoint()
+		touch := touch.Point{}
+		if point.Z>>6 > 100 {
+			rawX := mapval(point.X, Xmin, Xmax, 0, int(width))
+			rawY := mapval(point.Y, Ymin, Ymax, 0, int(height))
+			touch.X = rawX
+			touch.Y = rawY
+			touch.Z = 1
+		} else {
+			touch.X = 0
+			touch.Y = 0
+			touch.Z = 0
+		}
+
+		if last.Z != touch.Z {
+			debounce = 0
+			last = touch
+		} else if math.Abs(float64(touch.X-last.X)) > 4 ||
+			math.Abs(float64(touch.Y-last.Y)) > 4 {
+			debounce = 0
+			last = touch
+		} else if debounce > 1 {
+			debounce = 0
+			HandleTouch(display, last)
+		} else if touch.Z > 0 {
+			debounce++
+		} else {
+			last = touch
+			debounce = 0
+		}
+
+	}
+}
+
+// based on Arduino's "map" function
+func mapval(x int, inMin int, inMax int, outMin int, outMax int) int {
+	return (x-inMin)*(outMax-outMin)/(inMax-inMin) + outMin
+}
+
+func HandleTouch(display touchPaintDisplay, touch touch.Point) {
+
+	if int16(touch.Y) < boxSize {
+		oldColor = currentColor
+		x := int16(touch.X)
+		switch {
+		case x < boxSize:
+			currentColor = red
+		case x < boxSize*2:
+			currentColor = yellow
+		case x < boxSize*3:
+			currentColor = green
+		case x < boxSize*4:
+			currentColor = cyan
+		case x < boxSize*5:
+			currentColor = blue
+		case x < boxSize*6:
+			currentColor = magenta
+		case x < boxSize*7:
+			currentColor = black
+		case x < boxSize*8:
+			currentColor = white
+		}
+
+		if oldColor == currentColor {
+			return
+		}
+
+		display.DrawRectangle((x/boxSize)*boxSize, 0, boxSize, boxSize, white)
+		switch oldColor {
+		case red:
+			x = 0
+		case yellow:
+			x = boxSize
+		case green:
+			x = boxSize * 2
+		case cyan:
+			x = boxSize * 3
+		case blue:
+			x = boxSize * 4
+		case magenta:
+			x = boxSize * 5
+		case black:
+			x = boxSize * 6
+		case white:
+			x = boxSize * 7
+		}
+		display.FillRectangle(int16(x), 0, boxSize, boxSize, oldColor)
+
+	}
+
+	if (int16(touch.Y) - penRadius) > boxSize {
+		display.FillRectangle(
+			int16(touch.X), int16(touch.Y), penRadius*2, penRadius*2, currentColor)
+	}
+}

examples/gc9a01/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"image/color"
+
+	"tinygo.org/x/drivers/gc9a01"
+)
+
+func main() {
+	machine.SPI0.Configure(machine.SPIConfig{
+		Frequency: 80000000,
+	})
+	display := gc9a01.New(machine.SPI0, machine.P6, machine.P7, machine.P8, machine.P9)
+	display.Configure(gc9a01.Config{Orientation: gc9a01.HORIZONTAL, Width: 240, Height: 240})
+
+	width, height := display.Size()
+
+	white := color.RGBA{255, 255, 255, 255}
+	red := color.RGBA{255, 0, 0, 255}
+	blue := color.RGBA{0, 0, 255, 255}
+	green := color.RGBA{0, 255, 0, 255}
+	black := color.RGBA{0, 0, 0, 255}
+
+	display.FillScreen(black)
+
+	display.FillRectangle(0, 0, width/2, height/2, white)
+	display.FillRectangle(width/2, 0, width/2, height/2, red)
+	display.FillRectangle(0, height/2, width/2, height/2, green)
+	display.FillRectangle(width/2, height/2, width/2, height/2, blue)
+	display.FillRectangle(width/4, height/4, width/2, height/2, black)
+
+	for {
+		time.Sleep(time.Hour)
+	}
+
+}

examples/gps/i2c/main.go

@@ -10,7 +10,7 @@ import (
 func main() {
 	println("GPS I2C Example")
 	machine.I2C0.Configure(machine.I2CConfig{})
-	ublox := gps.NewI2C(&machine.I2C0)
+	ublox := gps.NewI2C(machine.I2C0)
 	parser := gps.NewParser()
 	var fix gps.Fix
 	for {

examples/gps/uart/main.go

@@ -10,7 +10,7 @@ import (
 func main() {
 	println("GPS UART Example")
 	machine.UART1.Configure(machine.UARTConfig{BaudRate: 9600})
-	ublox := gps.NewUART(&machine.UART1)
+	ublox := gps.NewUART(machine.UART1)
 	parser := gps.NewParser()
 	var fix gps.Fix
 	for {

examples/hcsr04/main.go

@@ -1,4 +1,4 @@
-package hcsr04
+package main
 
 import (
 	"machine"

examples/hts221/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/hts221"
+)
+
+func main() {
+
+	// use Nano 33 BLE Sense's internal I2C bus
+	machine.I2C1.Configure(machine.I2CConfig{
+		SCL:       machine.SCL1_PIN,
+		SDA:       machine.SDA1_PIN,
+		Frequency: machine.TWI_FREQ_400KHZ,
+	})
+
+	sensor := hts221.New(machine.I2C1)
+
+	sensor.Configure() // power on and calibrate
+
+	if !sensor.Connected() {
+		println("HTS221 not connected!")
+		return
+	}
+
+	for {
+		h, _ := sensor.ReadHumidity()
+		t, _ := sensor.ReadTemperature()
+		println("h =", float32(h)/100.0, "% / t =", float32(t)/1000.0, "*C")
+		time.Sleep(time.Second)
+	}
+
+}

examples/i2csoft/adt7410/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/adt7410"
+	"tinygo.org/x/drivers/i2csoft"
+)
+
+func main() {
+	i2c := i2csoft.New(machine.SCL_PIN, machine.SDA_PIN)
+	i2c.Configure(i2csoft.I2CConfig{
+		Frequency: 400e3,
+	})
+
+	sensor := adt7410.New(i2c)
+	sensor.Configure()
+
+	for {
+		temp := sensor.ReadTempF()
+		fmt.Printf("temperature: %f\r\n", temp)
+		time.Sleep(time.Second)
+	}
+
+}

examples/ili9341/basic/atsamd21.go

@@ -1,29 +0,0 @@
-// +build atsamd21
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewSPI(
-		machine.SPI0,
-		machine.D0,
-		machine.D1,
-		machine.D2,
-	)
-
-	backlight = machine.D3
-)
-
-func init() {
-	machine.SPI0.Configure(machine.SPIConfig{
-		SCK:       machine.SPI0_SCK_PIN,
-		SDO:       machine.SPI0_SDO_PIN,
-		SDI:       machine.SPI0_SDI_PIN,
-		Frequency: 24000000,
-	})
-}

examples/ili9341/basic/main.go

@@ -2,9 +2,9 @@ package main
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
+	"tinygo.org/x/drivers/examples/ili9341/initdisplay"
 	"tinygo.org/x/drivers/ili9341"
 )
 
@@ -16,16 +16,15 @@ var (
 	green = color.RGBA{0, 255, 0, 255}
 )
 
+var (
+	display *ili9341.Device
+)
+
 func main() {
+	display = initdisplay.InitDisplay()
 
-	backlight.Configure(machine.PinConfig{machine.PinOutput})
-
-	display.Configure(ili9341.Config{})
 	width, height := display.Size()
 
-	display.FillScreen(black)
-	backlight.High()
-
 	display.FillRectangle(0, 0, width/2, height/2, white)
 	display.FillRectangle(width/2, 0, width/2, height/2, red)
 	display.FillRectangle(0, height/2, width/2, height/2, green)

examples/ili9341/basic/pyportal.go

@@ -1,22 +0,0 @@
-// +build pyportal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
-	backlight = machine.TFT_BACKLIGHT
-)

examples/ili9341/basic/wioterminal.go

@@ -1,29 +0,0 @@
-// +build wioterminal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewSPI(
-		machine.SPI3,
-		machine.LCD_DC,
-		machine.LCD_SS_PIN,
-		machine.LCD_RESET,
-	)
-
-	backlight = machine.LCD_BACKLIGHT
-)
-
-func init() {
-	machine.SPI3.Configure(machine.SPIConfig{
-		SCK:       machine.LCD_SCK_PIN,
-		SDO:       machine.LCD_SDO_PIN,
-		SDI:       machine.LCD_SDI_PIN,
-		Frequency: 40000000,
-	})
-}

examples/ili9341/initdisplay/atsamd21.go

@@ -0,0 +1,38 @@
+//go:build atsamd21
+
+package initdisplay
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+func InitDisplay() *ili9341.Device {
+	machine.SPI0.Configure(machine.SPIConfig{
+		SCK:       machine.SPI0_SCK_PIN,
+		SDO:       machine.SPI0_SDO_PIN,
+		SDI:       machine.SPI0_SDI_PIN,
+		Frequency: 24000000,
+	})
+
+	// configure backlight
+	backlight := machine.D3
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
+
+	display := ili9341.NewSPI(
+		machine.SPI0,
+		machine.D0,
+		machine.D1,
+		machine.D2,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{})
+
+	backlight.High()
+
+	display.SetRotation(ili9341.Rotation270)
+
+	return display
+}

examples/ili9341/initdisplay/feather.go

@@ -0,0 +1,41 @@
+//go:build feather_m0 || feather_m4 || feather_m4_can || feather_nrf52840 || feather_nrf52840_sense || feather_stm32f405 || feather_rp2040
+
+package initdisplay
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+func InitDisplay() *ili9341.Device {
+	machine.D5.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.D6.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	machine.SPI0.Configure(machine.SPIConfig{
+		SCK:       machine.SPI0_SCK_PIN,
+		SDO:       machine.SPI0_SDO_PIN,
+		SDI:       machine.SPI0_SDI_PIN,
+		Frequency: 40000000,
+	})
+
+	// configure backlight
+	backlight := machine.D9
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
+
+	display := ili9341.NewSPI(
+		machine.SPI0,
+		machine.D10, // LCD_DC,
+		machine.D11, // LCD_SS_PIN,
+		machine.D12, // LCD_RESET,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{})
+
+	backlight.High()
+
+	display.SetRotation(ili9341.Rotation270)
+
+	return display
+}

examples/ili9341/initdisplay/m5stack.go

@@ -0,0 +1,42 @@
+//go:build m5stack
+
+package initdisplay
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+func InitDisplay() *ili9341.Device {
+	machine.SPI2.Configure(machine.SPIConfig{
+		SCK:       machine.SPI0_SCK_PIN,
+		SDO:       machine.SPI0_SDO_PIN,
+		SDI:       machine.SPI0_SDI_PIN,
+		Frequency: 40e6,
+	})
+
+	// configure backlight
+	backlight := machine.LCD_BL_PIN
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
+
+	display := ili9341.NewSPI(
+		machine.SPI2,
+		machine.LCD_DC_PIN,
+		machine.LCD_SS_PIN,
+		machine.LCD_RST_PIN,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{
+		Width:            320,
+		Height:           240,
+		DisplayInversion: true,
+	})
+
+	backlight.High()
+
+	display.SetRotation(ili9341.Rotation0Mirror)
+
+	return display
+}

examples/ili9341/initdisplay/m5stack_core2.go

@@ -0,0 +1,48 @@
+//go:build m5stack_core2
+
+package initdisplay
+
+import (
+	"image/color"
+	"machine"
+
+	axp192 "tinygo.org/x/drivers/axp192/m5stack-core2-axp192"
+	"tinygo.org/x/drivers/i2csoft"
+	"tinygo.org/x/drivers/ili9341"
+)
+
+// InitDisplay initializes the display of each board.
+func InitDisplay() *ili9341.Device {
+	machine.SPI2.Configure(machine.SPIConfig{
+		SCK:       machine.LCD_SCK_PIN,
+		SDO:       machine.LCD_SDO_PIN,
+		SDI:       machine.LCD_SDI_PIN,
+		Frequency: 40e6,
+	})
+
+	i2c := i2csoft.New(machine.SCL0_PIN, machine.SDA0_PIN)
+	i2c.Configure(i2csoft.I2CConfig{Frequency: 100e3})
+
+	axp := axp192.New(i2c)
+	led := axp.LED
+	led.Low()
+
+	display := ili9341.NewSPI(
+		machine.SPI2,
+		machine.LCD_DC_PIN,
+		machine.LCD_SS_PIN,
+		machine.NoPin,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{
+		Width:            320,
+		Height:           240,
+		DisplayInversion: true,
+	})
+	display.FillScreen(color.RGBA{255, 255, 255, 255})
+
+	display.SetRotation(ili9341.Rotation0Mirror)
+
+	return display
+}

examples/ili9341/initdisplay/pyportal.go

@@ -0,0 +1,33 @@
+//go:build pyportal
+
+package initdisplay
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+func InitDisplay() *ili9341.Device {
+	display := ili9341.NewParallel(
+		machine.LCD_DATA0,
+		machine.TFT_WR,
+		machine.TFT_DC,
+		machine.TFT_CS,
+		machine.TFT_RESET,
+		machine.TFT_RD,
+	)
+
+	// configure backlight
+	backlight := machine.TFT_BACKLIGHT
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
+
+	// configure display
+	display.Configure(ili9341.Config{})
+
+	backlight.High()
+
+	display.SetRotation(ili9341.Rotation270)
+
+	return display
+}

examples/ili9341/initdisplay/wioterminal.go

@@ -0,0 +1,38 @@
+//go:build wioterminal
+
+package initdisplay
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/ili9341"
+)
+
+func InitDisplay() *ili9341.Device {
+	machine.SPI3.Configure(machine.SPIConfig{
+		SCK:       machine.LCD_SCK_PIN,
+		SDO:       machine.LCD_SDO_PIN,
+		SDI:       machine.LCD_SDI_PIN,
+		Frequency: 40000000,
+	})
+
+	// configure backlight
+	backlight := machine.LCD_BACKLIGHT
+	backlight.Configure(machine.PinConfig{machine.PinOutput})
+
+	display := ili9341.NewSPI(
+		machine.SPI3,
+		machine.LCD_DC,
+		machine.LCD_SS_PIN,
+		machine.LCD_RESET,
+	)
+
+	// configure display
+	display.Configure(ili9341.Config{})
+
+	backlight.High()
+
+	display.SetRotation(ili9341.Rotation270)
+
+	return display
+}

examples/ili9341/pyportal_boing/main.go

@@ -3,9 +3,9 @@
 package main
 
 import (
-	"machine"
 	"time"
 
+	"tinygo.org/x/drivers/examples/ili9341/initdisplay"
 	"tinygo.org/x/drivers/examples/ili9341/pyportal_boing/graphics"
 	"tinygo.org/x/drivers/ili9341"
 )
@@ -25,7 +25,7 @@ const (
 )
 
 var (
-	frameBuffer = [(graphics.BALLHEIGHT + 8) * (graphics.BALLWIDTH + 8)]uint16{}
+	frameBuffer = [(graphics.BALLHEIGHT + 8) * (graphics.BALLWIDTH + 8) * 2]uint8{}
 
 	startTime int64
 	frame     int64
@@ -44,20 +44,17 @@ var (
 	palette [16]uint16
 )
 
+var (
+	display *ili9341.Device
+)
+
 func main() {
+	display = initdisplay.InitDisplay()
 
-	// configure backlight
-	backlight.Configure(machine.PinConfig{machine.PinOutput})
-
-	// configure display
-	display.Configure(ili9341.Config{})
 	print("width, height == ")
 	width, height := display.Size()
 	println(width, height)
 
-	backlight.High()
-
-	display.SetRotation(ili9341.Rotation270)
 	DrawBackground()
 
 	startTime = time.Now().UnixNano()
@@ -179,7 +176,8 @@ func main() {
 						c = BGCOLOR
 					}
 				}
-				frameBuffer[y*int(width)+x] = c
+				frameBuffer[(y*int(width)+x)*2] = byte(c >> 8)
+				frameBuffer[(y*int(width)+x)*2+1] = byte(c)
 				bx1++ // Increment bitmap position counters (X axis)
 				bgx1++
 			}
@@ -190,7 +188,7 @@ func main() {
 			bgy++
 		}
 
-		display.DrawRGBBitmap(minx, miny, frameBuffer[:width*height], width, height)
+		display.DrawRGBBitmap8(minx, miny, frameBuffer[:width*height*2], width, height)
 
 		// Show approximate frame rate
 		frame++
@@ -215,11 +213,13 @@ func DrawBackground() {
 				b = graphics.Background[j*byteWidth+k/8]
 			}
 			if b&0x80 == 0 {
-				frameBuffer[k] = BGCOLOR
+				frameBuffer[2*k] = byte(BGCOLOR >> 8)
+				frameBuffer[2*k+1] = byte(BGCOLOR & 0xFF)
 			} else {
-				frameBuffer[k] = GRIDCOLOR
+				frameBuffer[2*k] = byte(GRIDCOLOR >> 8)
+				frameBuffer[2*k+1] = byte(GRIDCOLOR & 0xFF)
 			}
 		}
-		display.DrawRGBBitmap(0, j, frameBuffer[0:w], w, 1)
+		display.DrawRGBBitmap8(0, j, frameBuffer[0:w*2], w, 1)
 	}
 }

examples/ili9341/pyportal_boing/pyportal.go

@@ -1,22 +0,0 @@
-// +build pyportal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
-	backlight = machine.TFT_BACKLIGHT
-)

examples/ili9341/pyportal_boing/wioterminal.go

@@ -1,29 +0,0 @@
-// +build wioterminal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewSPI(
-		machine.SPI3,
-		machine.LCD_DC,
-		machine.LCD_SS_PIN,
-		machine.LCD_RESET,
-	)
-
-	backlight = machine.LCD_BACKLIGHT
-)
-
-func init() {
-	machine.SPI3.Configure(machine.SPIConfig{
-		SCK:       machine.LCD_SCK_PIN,
-		SDO:       machine.LCD_SDO_PIN,
-		SDI:       machine.LCD_SDI_PIN,
-		Frequency: 40000000,
-	})
-}

examples/ili9341/scroll/atsamd21.go

@@ -1,29 +0,0 @@
-// +build atsamd21
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewSPI(
-		machine.SPI0,
-		machine.D0,
-		machine.D1,
-		machine.D2,
-	)
-
-	backlight = machine.D3
-)
-
-func init() {
-	machine.SPI0.Configure(machine.SPIConfig{
-		SCK:       machine.SPI0_SCK_PIN,
-		SDO:       machine.SPI0_SDO_PIN,
-		SDI:       machine.SPI0_SDI_PIN,
-		Frequency: 24000000,
-	})
-}

examples/ili9341/scroll/main.go

@@ -2,9 +2,9 @@ package main
 
 import (
 	"image/color"
-	"machine"
 	"time"
 
+	"tinygo.org/x/drivers/examples/ili9341/initdisplay"
 	"tinygo.org/x/drivers/ili9341"
 )
 
@@ -16,16 +16,15 @@ var (
 	white = color.RGBA{255, 255, 255, 255}
 )
 
+var (
+	display *ili9341.Device
+)
+
 func main() {
+	display := initdisplay.InitDisplay()
 
-	backlight.Configure(machine.PinConfig{machine.PinOutput})
-
-	display.Configure(ili9341.Config{})
 	width, height := display.Size()
 
-	display.FillScreen(black)
-	backlight.High()
-
 	display.FillRectangle(0, 0, width/2, height/2, white)
 	display.FillRectangle(width/2, 0, width/2, height/2, red)
 	display.FillRectangle(0, height/2, width/2, height/2, green)

examples/ili9341/scroll/pyportal.go

@@ -1,22 +0,0 @@
-// +build pyportal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewParallel(
-		machine.LCD_DATA0,
-		machine.TFT_WR,
-		machine.TFT_DC,
-		machine.TFT_CS,
-		machine.TFT_RESET,
-		machine.TFT_RD,
-	)
-
-	backlight = machine.TFT_BACKLIGHT
-)

examples/ili9341/scroll/wioterminal.go

@@ -1,29 +0,0 @@
-// +build wioterminal
-
-package main
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/ili9341"
-)
-
-var (
-	display = ili9341.NewSPI(
-		machine.SPI3,
-		machine.LCD_DC,
-		machine.LCD_SS_PIN,
-		machine.LCD_RESET,
-	)
-
-	backlight = machine.LCD_BACKLIGHT
-)
-
-func init() {
-	machine.SPI3.Configure(machine.SPIConfig{
-		SCK:       machine.LCD_SCK_PIN,
-		SDO:       machine.LCD_SDO_PIN,
-		SDI:       machine.LCD_SDI_PIN,
-		Frequency: 40000000,
-	})
-}

examples/ili9341/slideshow/README.md

@@ -0,0 +1,18 @@
+# examples/ili9341/slideshow
+
+![](./slideshow.jpg)
+
+This example uses the image package for TinyGo to display png and jpeg images.  
+
+## How to create an image
+
+The following program will output an image binary like the one in [images.go](./images.go).  
+
+```
+go run ./examples/ili9341/slideshow/convert2bin ./path/to/png_or_jpg.png
+```
+
+## Notes
+
+Displaying a 320x240 png or jpeg often requires more than 50KB of memory.  
+The examples include samd21 settings, but if you run them as is, you will get a memory size error.