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>

Makefile

@@ -249,6 +249,9 @@ endif
 	@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
+
 
 # rwildcard is a recursive version of $(wildcard) 
 # https://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html

README.md

@@ -52,7 +52,7 @@ func main() {
 
 ## Currently supported devices
 
-The following 90 devices are supported.
+The following 91 devices are supported.
 
 | Device Name                                                                                                                                                                                         | Interface Type |
 |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------|
@@ -63,6 +63,7 @@ The following 90 devices are supported.
 | [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 |
@@ -120,6 +121,7 @@ The following 90 devices are supported.
 | [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 |

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
+)

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/lora/lorawan/atcmd/README.md

@@ -0,0 +1,41 @@
+# AT-CMD implementation of at-lora command set
+
+This example implements the AT command set as used by Seeed in the LoRa-E5 series of boards, but in the form of a TinyGo program that provides a serial interface. 
+
+See https://files.seeedstudio.com/products/317990687/res/LoRa-E5%20AT%20Command%20Specification_V1.0%20.pdf for more information.
+
+```
+$ tinygo monitor
+Connected to /dev/ttyACM0. Press Ctrl-C to exit.
++AT: OK
++VER: 0.0.1 (sx127x v18)
+```
+
+# Building
+
+Run the following commands from the main `drivers` directory.
+
+## Simulator
+
+Builds/flashes atcmd console application with simulator instead of actual LoRa radio.
+
+```
+tinygo flash -target pico ./examples/lora/lorawan/atcmd/
+```
+
+## PyBadge with LoRa Featherwing 
+
+Builds/flashes atcmd console application on PyBadge using LoRa Featherwing (RFM95/SX1276).
+
+```
+tinygo flash -target pybadge -tags featherwing ./examples/lora/lorawan/atcmd/
+```
+
+## LoRa-E5 
+
+Builds/flashes atcmd console application on Lora-E5 using onboard SX126x.
+
+```
+tinygo flash -target lorae5 ./examples/lora/lorawan/atcmd/
+```
+

examples/lora/lorawan/atcmd/commands.go

@@ -0,0 +1,485 @@
+package main
+
+import (
+	"encoding/hex"
+	"strings"
+
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
+	"tinygo.org/x/drivers/lora/lorawan"
+)
+
+// Use to test if connection to module is OK.
+func quicktest() {
+	writeCommandOutput("AT", "OK")
+}
+
+// Check firmware version.
+func version() {
+	writeCommandOutput("VER", common.CurrentVersion()+" ("+common.FirmwareVersion()+")")
+}
+
+// Use to check the ID of the LoRaWAN module, or change the ID.
+func id(args string) error {
+	cmd := "ID"
+
+	// look for comma in args
+	param, val, hasComma := strings.Cut(args, ",")
+	if hasComma {
+		// set
+		data := strings.Trim(val, "\"'")
+
+		// convert data from hex formatted string
+		data = strings.ReplaceAll(data, " ", "")
+		hexdata, err := hex.DecodeString(data)
+		if err != nil {
+			writeCommandOutput(cmd, err.Error())
+
+			return err
+		}
+
+		switch param {
+		case "DevAddr":
+			if err := session.SetDevAddr(hexdata); err != nil {
+				writeCommandOutput(cmd, err.Error())
+
+				return err
+			}
+
+			writeCommandOutput(cmd, "DevAddr, "+session.GetDevAddr())
+		case "DevEui":
+			if err := otaa.SetDevEUI(hexdata); err != nil {
+				writeCommandOutput(cmd, err.Error())
+
+				return err
+			}
+
+			writeCommandOutput(cmd, "DevEui, "+otaa.GetDevEUI())
+		case "AppEui":
+			if err := otaa.SetAppEUI(hexdata); err != nil {
+				writeCommandOutput(cmd, err.Error())
+
+				return err
+			}
+
+			writeCommandOutput(cmd, "AppEui, "+otaa.GetAppEUI())
+		default:
+			return errInvalidCommand
+		}
+
+		return nil
+	}
+
+	// get
+	switch param {
+	case "DevAddr":
+		writeCommandOutput(cmd, "DevAddr, "+session.GetDevAddr())
+	case "DevEui":
+		writeCommandOutput(cmd, "DevEui, "+otaa.GetDevEUI())
+	case "AppEui":
+		writeCommandOutput(cmd, "AppEui, "+otaa.GetAppEUI())
+	default:
+		writeCommandOutput(cmd, "DevAddr, "+session.GetDevAddr())
+		writeCommandOutput(cmd, "DevEui, "+otaa.GetDevEUI())
+		writeCommandOutput(cmd, "AppEui, "+otaa.GetAppEUI())
+	}
+
+	return nil
+}
+
+// Use to reset the module. If module returns error, then reset function is invalid.
+func reset() error {
+	radio.Reset()
+
+	writeCommandOutput("RESET", "OK")
+	return nil
+}
+
+// Use to send string format frame which is no need to be confirmed by the server.
+func msg(data string) error {
+	cmd := "MSG"
+	writeCommandOutput(cmd, "Start")
+
+	if err := radio.Tx([]byte(data), defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+// Use to send string format frame which must be confirmed by the server
+func cmsg(data string) error {
+	cmd := "CMSG"
+	writeCommandOutput(cmd, "Start")
+
+	if err := radio.Tx([]byte(data), defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	// TODO: confirmation
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+// Use to send hex format frame which is no need to be confirmed by the server
+func msghex(data string) error {
+	cmd := "MSGHEX"
+	writeCommandOutput(cmd, "Start")
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+// Use to send hex format frame which must be confirmed by the server.
+func cmsghex(data string) error {
+	cmd := "CMSGHEX"
+	writeCommandOutput(cmd, "Start")
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+// Use to send string format LoRaWAN proprietary frames
+func pmsg(data string) error {
+	cmd := "PMSG"
+	writeCommandOutput(cmd, "Start")
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+// Use to send hex format LoRaWAN proprietary frames.
+func pmsghex(data string) error {
+	cmd := "PMSGHEX"
+	writeCommandOutput(cmd, "Start")
+
+	writeCommandOutput(cmd, "Done")
+
+	return nil
+}
+
+// Set PORT number which will be used by MSG/CMSG/MSGHEX/CMSGHEX command to send
+// message, port number should range from 1 to 255. User should refer to LoRaWAN
+// specification to choose port.
+func port(p string) error {
+	cmd := "PMSG"
+	writeCommandOutput(cmd, p)
+
+	return nil
+}
+
+// Set ADR function of LoRaWAN module
+func adr(state string) error {
+	cmd := "ADR"
+	writeCommandOutput(cmd, state)
+
+	return nil
+}
+
+// Use LoRaWAN defined DRx to set datarate of LoRaWAN AT modem.
+func dr(rate string) error {
+	cmd := "DR"
+	writeCommandOutput(cmd, rate)
+
+	return nil
+}
+
+// Channel Configuration
+func ch(channel string) error {
+	cmd := "CH"
+	writeCommandOutput(cmd, channel)
+
+	return nil
+}
+
+// Set and Check Power
+func power(setting string) error {
+	cmd := "POWER"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+// Unconfirmed message repeats times.
+func rept(setting string) error {
+	cmd := "REPT"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+// Confirmed message retry times. Valid range 0~254,
+// if retry times is less than 2, only one message will
+// be sent. Random delay 3 - 10s between each retry
+// (band duty cycle limitation has the priority)
+func retry(setting string) error {
+	cmd := "RETRY"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func rxwin2(setting string) error {
+	cmd := "RXWIN2"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func rxwin1(setting string) error {
+	cmd := "RXWIN1"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func key(setting string) error {
+	cmd := "KEY"
+
+	// look for comma in args
+	param, val, hasComma := strings.Cut(setting, ",")
+	if hasComma {
+		// set
+		data := strings.Trim(val, "\"'")
+
+		// convert data from hex formatted string
+		data = strings.ReplaceAll(data, " ", "")
+		hexdata, err := hex.DecodeString(data)
+		if err != nil {
+			writeCommandOutput(cmd, err.Error())
+
+			return err
+		}
+
+		switch param {
+		case "APPKEY":
+			if err := otaa.SetAppKey(hexdata); err != nil {
+				writeCommandOutput(cmd, err.Error())
+
+				return err
+			}
+
+			writeCommandOutput(cmd, "APPKEY, "+otaa.GetAppKey())
+		default:
+			return errInvalidCommand
+		}
+	}
+
+	// cannot get keys
+	return errInvalidCommand
+}
+
+func fdefault(setting string) error {
+	cmd := "FDEFAULT"
+	writeCommandOutput(cmd, "OK")
+
+	return nil
+}
+
+func mode(setting string) error {
+	cmd := "MODE"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func join(setting string) error {
+	// TODO: check that DevEUI, AppEUI, and AppKey have values
+
+	cmd := "JOIN"
+	writeCommandOutput(cmd, "Starting")
+	if err := lorawan.Join(otaa, session); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Network joined")
+	writeCommandOutput(cmd, "DevEui, "+otaa.GetDevEUI())
+	writeCommandOutput(cmd, "AppEui, "+otaa.GetAppEUI())
+	writeCommandOutput(cmd, "DevAddr, "+session.GetDevAddr())
+	writeCommandOutput(cmd, "NetID, "+otaa.GetNetID())
+	writeCommandOutput(cmd, "NwkSKey, "+session.GetNwkSKey())
+	writeCommandOutput(cmd, "AppSKey, "+session.GetAppSKey())
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+func beacon(setting string) error {
+	cmd := "BEACON"
+	writeCommandOutput(cmd, "Starting")
+
+	writeCommandOutput(cmd, "Done")
+
+	return nil
+}
+
+func class(setting string) error {
+	cmd := "CLASS"
+	writeCommandOutput(cmd, "Starting")
+
+	writeCommandOutput(cmd, "Done")
+
+	return nil
+}
+
+func delay(setting string) error {
+	cmd := "DELAY"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func lw(setting string) error {
+	cmd := "LW"
+	writeCommandOutput(cmd, setting)
+
+	return nil
+}
+
+func wdt(setting string) error {
+	cmd := "WDT"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func lowpower(setting string) error {
+	cmd := "LOWPOWER"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func vdd(setting string) error {
+	cmd := "VDD"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func temp(setting string) error {
+	cmd := "TEMP"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func rtc(setting string) error {
+	cmd := "RTC"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func eeprom(setting string) error {
+	cmd := "EEPROM"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func uartcmd(setting string) error {
+	cmd := "UART"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func test(setting string) error {
+	cmd := "TEST"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func log(setting string) error {
+	cmd := "LOG"
+	writeCommandOutput(cmd, "Not implemented")
+
+	return nil
+}
+
+func send(data string) error {
+	cmd := "SEND"
+	writeCommandOutput(cmd, "Start")
+
+	// remove leading/trailing quotes
+	data = strings.Trim(data, "\"'")
+
+	if err := radio.Tx([]byte(data), defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+func sendhex(data string) error {
+	cmd := "SENDHEX"
+	writeCommandOutput(cmd, "Start")
+
+	// remove leading/trailing quotes
+	data = strings.Trim(data, "\"'")
+
+	// convert data from hex formatted string
+	data = strings.ReplaceAll(data, " ", "")
+	payload, err := hex.DecodeString(data)
+	if err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	if err := radio.Tx(payload, defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+func recv(setting string) error {
+	cmd := "RECV"
+
+	data, err := common.Lorarx()
+	if err != nil {
+		writeCommandOutput(cmd, "ERROR "+err.Error())
+		return err
+	}
+	writeCommandOutput(cmd, string(data))
+
+	return nil
+}
+
+func recvhex(setting string) error {
+	cmd := "RECVHEX"
+
+	data, err := common.Lorarx()
+	if err != nil {
+		writeCommandOutput(cmd, "ERROR "+err.Error())
+		return err
+	}
+	writeCommandOutput(cmd, string(data))
+
+	return nil
+}
+
+func crlf() {
+	uart.Write([]byte("\r\n"))
+}
+
+func writeCommandOutput(cmd, data string) {
+	uart.Write([]byte("+" + cmd + ": "))
+	uart.Write([]byte(data))
+	crlf()
+}

examples/lora/lorawan/atcmd/main.go

@@ -0,0 +1,76 @@
+// AT command set console running on the device UART to communicate with
+// an attached LoRa device.
+//
+// Computer <-> UART <-> MCU <-> SPI <-> SX126x/SX127x
+//
+// Connect using default baudrate for this hardware, 8-N-1 with your terminal program.
+// For details on the AT command set, see:
+// https://files.seeedstudio.com/products/317990687/res/LoRa-E5%20AT%20Command%20Specification_V1.0%20.pdf
+package main
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/lora/lorawan"
+)
+
+// change these to test a different UART or pins if available
+var (
+	uart  = machine.Serial
+	tx    = machine.UART_TX_PIN
+	rx    = machine.UART_RX_PIN
+	input = make([]byte, 0, 64)
+
+	radio   lora.Radio
+	session *lorawan.Session
+	otaa    *lorawan.Otaa
+
+	defaultTimeout uint32 = 1000
+)
+
+func main() {
+	uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
+
+	var err error
+	radio, err = common.SetupLora()
+	if err != nil {
+		fail(err.Error())
+	}
+
+	session = &lorawan.Session{}
+	otaa = &lorawan.Otaa{}
+	lorawan.UseRadio(radio)
+
+	for {
+		if uart.Buffered() > 0 {
+			data, _ := uart.ReadByte()
+
+			switch data {
+			case 13:
+				// return key
+				if err := parse(input); err != nil {
+					uart.Write([]byte("ERROR: "))
+					uart.Write([]byte(err.Error()))
+					crlf()
+				}
+				input = input[:0]
+			default:
+				// just capture the character
+				input = append(input, data)
+			}
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+}
+
+func fail(msg string) {
+	for {
+		uart.Write([]byte(msg))
+		crlf()
+
+		time.Sleep(time.Minute)
+	}
+}

examples/lora/lorawan/atcmd/parser.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"errors"
+	"strings"
+)
+
+var (
+	errInvalidCommand = errors.New("Invalid command")
+)
+
+func parse(data []byte) error {
+	switch {
+	case len(data) < 2, string(data[0:2]) != "AT":
+		return errInvalidCommand
+	case len(data) == 2:
+		// just the AT command by itself
+		quicktest()
+	case len(data) < 6 || data[2] != '+':
+		return errInvalidCommand
+	default:
+		// parse the rest of the command
+		cmd, args, _ := strings.Cut(string(data[3:]), "=")
+		return parseCommand(cmd, args)
+	}
+
+	return nil
+}
+
+func parseCommand(cmd, args string) error {
+	switch cmd {
+	case "VER":
+		version()
+	case "ID":
+		id(args)
+	case "RESET":
+		reset()
+	case "MSG":
+		msg(args)
+	case "CMSG":
+		cmsg(args)
+	case "MSGHEX":
+		msghex(args)
+	case "CMSGHEX":
+		cmsghex(args)
+	case "PMSG":
+		pmsg(args)
+	case "PMSGHEX":
+		pmsg(args)
+	case "PORT":
+		port(args)
+	case "ADR":
+		adr(args)
+	case "DR":
+		dr(args)
+	case "CH":
+		ch(args)
+	case "POWER":
+		power(args)
+	case "REPT":
+		rept(args)
+	case "RETRY":
+		retry(args)
+	case "RXWIN2":
+		rxwin2(args)
+	case "RXWIN1":
+		rxwin1(args)
+	case "KEY":
+		key(args)
+	case "FDEFAULT":
+		fdefault(args)
+	case "MODE":
+		mode(args)
+	case "JOIN":
+		join(args)
+	case "BEACON":
+		join(args)
+	case "CLASS":
+		class(args)
+	case "DELAY":
+		delay(args)
+	case "LW":
+		lw(args)
+	case "WDT":
+		wdt(args)
+	case "LOWPOWER":
+		lowpower(args)
+	case "VDD":
+		vdd(args)
+	case "TEMP":
+		temp(args)
+	case "RTC":
+		rtc(args)
+	case "EEPROM":
+		eeprom(args)
+	case "UART":
+		uartcmd(args)
+	case "TEST":
+		test(args)
+	case "LOG":
+		log(args)
+	case "RECV":
+		recv(args)
+	case "RECVHEX":
+		recvhex(args)
+	case "SEND":
+		send(args)
+	case "SENDHEX":
+		sendhex(args)
+	default:
+		return errInvalidCommand
+	}
+
+	return nil
+}

examples/lora/lorawan/basic-demo/README.md

@@ -0,0 +1,35 @@
+# Simple Lorawan example
+
+This demo code will connect Lorawan network and send sample uplink message
+
+You may change your Lorawan keys (AppEUI, DevEUI, AppKEY) in key-default.go
+
+
+```
+$ tinygo monitor
+Connected to /dev/ttyACM0. Press Ctrl-C to exit.
+Lorawan Simple Demo
+Start Lorawan Join sequence
+loraConnect: Connected !
+```
+
+# Building
+
+## Simulator
+
+```
+tinygo flash -target pico ./examples/lora/lorawan/basic-demo
+```
+
+## PyBadge with LoRa Featherwing 
+
+```
+tinygo flash -target pybadge -tags featherwing ./examples/lora/lorawan/basic-demo
+```
+
+## LoRa-E5 
+
+```
+tinygo flash -target lorae5 ./examples/lora/lorawan/basic-demo
+```
+

examples/lora/lorawan/basic-demo/keys-default.go

@@ -0,0 +1,11 @@
+//go:build !customkeys
+
+package main
+
+// These are sample keys, so the example builds
+// Either change here, or create a new go file and use customkeys build tag
+func setLorawanKeys() {
+	otaa.SetAppEUI([]uint8{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	otaa.SetDevEUI([]uint8{0xB3, 0xD5, 0x41, 0x00, 0x0A, 0xF1, 0xA4, 0x45})
+	otaa.SetAppKey([]uint8{0x12, 0x22, 0xA3, 0xFF, 0x0C, 0x7B, 0x76, 0x7B, 0x8F, 0xD3, 0x12, 0x4F, 0xCE, 0x7A, 0x32, 0x16})
+}

examples/lora/lorawan/basic-demo/main.go

@@ -0,0 +1,107 @@
+// Simple code for connecting to Lorawan network and uploading sample payload
+package main
+
+import (
+	"errors"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/lora/lorawan"
+)
+
+const (
+	LORAWAN_JOIN_TIMEOUT_SEC    = 180
+	LORAWAN_RECONNECT_DELAY_SEC = 15
+	LORAWAN_UPLINK_DELAY_SEC    = 60
+)
+
+var (
+	radio   lora.Radio
+	session *lorawan.Session
+	otaa    *lorawan.Otaa
+)
+
+func loraConnect() error {
+	start := time.Now()
+	var err error
+	for time.Since(start) < LORAWAN_JOIN_TIMEOUT_SEC*time.Second {
+		println("Trying to join network")
+		err = lorawan.Join(otaa, session)
+		if err == nil {
+			println("Connected to network !")
+			return nil
+		}
+		println("Join error:", err, "retrying in", LORAWAN_RECONNECT_DELAY_SEC, "sec")
+		time.Sleep(time.Second * LORAWAN_RECONNECT_DELAY_SEC)
+	}
+
+	err = errors.New("Unable to join Lorawan network")
+	println(err.Error())
+	return err
+}
+
+func failMessage(err error) {
+	println("FATAL:", err)
+	for {
+	}
+}
+
+func main() {
+	println("*** Lorawan basic join and uplink demo ***")
+
+	// Board specific Lorawan initialization
+	var err error
+	radio, err = common.SetupLora()
+	if err != nil {
+		failMessage(err)
+	}
+
+	// Required for LoraWan operations
+	session = &lorawan.Session{}
+	otaa = &lorawan.Otaa{}
+
+	// Initial Lora modulation configuration
+	loraConf := lora.Config{
+		Freq:           868100000,
+		Bw:             lora.Bandwidth_125_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Ldr:            lora.LowDataRateOptimizeOff,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPublic,
+		LoraTxPowerDBm: 20,
+	}
+	radio.LoraConfig(loraConf)
+
+	// Connect the lorawan with the Lora Radio device.
+	lorawan.UseRadio(radio)
+
+	// Configure AppEUI, DevEUI, APPKey
+	setLorawanKeys()
+
+	// Try to connect Lorawan network
+	if err := loraConnect(); err != nil {
+		failMessage(err)
+	}
+
+	// Try to periodicaly send an uplink sample message
+	upCount := 1
+	for {
+		payload := "Hello TinyGo #" + strconv.Itoa(upCount)
+
+		if err := lorawan.SendUplink([]byte(payload), session); err != nil {
+			println("Uplink error:", err)
+		} else {
+			println("Uplink success, msg=", payload)
+		}
+
+		println("Sleeping for", LORAWAN_UPLINK_DELAY_SEC, "sec")
+		time.Sleep(time.Second * LORAWAN_UPLINK_DELAY_SEC)
+		upCount++
+	}
+}

examples/lora/lorawan/common/radio.go

@@ -0,0 +1,10 @@
+package common
+
+import (
+	"errors"
+)
+
+var (
+	errRadioNotFound = errors.New("radio not found")
+	errRxTimeout     = errors.New("radio RX timeout")
+)

examples/lora/lorawan/common/sim.go

@@ -0,0 +1,40 @@
+//go:build !featherwing && !stm32wlx && !sx126x
+
+package common
+
+import "tinygo.org/x/drivers/lora"
+
+// do simulator setup here
+func SetupLora() (lora.Radio, error) {
+	return &SimLoraRadio{}, nil
+}
+
+type SimLoraRadio struct {
+}
+
+func (sr *SimLoraRadio) Reset() {
+}
+
+func (sr *SimLoraRadio) Tx(pkt []uint8, timeoutMs uint32) error {
+	return nil
+}
+
+func (sr *SimLoraRadio) Rx(timeoutMs uint32) ([]uint8, error) {
+	return nil, nil
+}
+
+func (sr *SimLoraRadio) SetFrequency(freq uint32)    {}
+func (sr *SimLoraRadio) SetIqMode(mode uint8)        {}
+func (sr *SimLoraRadio) SetCodingRate(cr uint8)      {}
+func (sr *SimLoraRadio) SetBandwidth(bw uint8)       {}
+func (sr *SimLoraRadio) SetCrc(enable bool)          {}
+func (sr *SimLoraRadio) SetSpreadingFactor(sf uint8) {}
+func (sr *SimLoraRadio) LoraConfig(cnf lora.Config)  {}
+
+func FirmwareVersion() string {
+	return "simulator " + CurrentVersion()
+}
+
+func Lorarx() ([]byte, error) {
+	return nil, nil
+}

examples/lora/lorawan/common/stm32wlx.go

@@ -0,0 +1,65 @@
+//go:build stm32wlx
+
+package common
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/sx126x"
+)
+
+const (
+	FREQ                      = 868100000
+	LORA_DEFAULT_RXTIMEOUT_MS = 1000
+	LORA_DEFAULT_TXTIMEOUT_MS = 5000
+)
+
+var (
+	loraRadio *sx126x.Device
+)
+
+var spi = machine.SPI3
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl()
+}
+
+// do sx126x setup here
+func SetupLora() (lora.Radio, error) {
+	loraRadio = sx126x.New(spi)
+	loraRadio.SetDeviceType(sx126x.DEVICE_TYPE_SX1262)
+
+	// Create radio controller for target
+	loraRadio.SetRadioController(newRadioControl())
+
+	if state := loraRadio.DetectDevice(); !state {
+		return nil, errRadioNotFound
+	}
+
+	loraConf := lora.Config{
+		Freq:           FREQ,
+		Bw:             lora.Bandwidth_500_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Ldr:            lora.LowDataRateOptimizeOff,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPrivate,
+		LoraTxPowerDBm: 20,
+	}
+
+	loraRadio.LoraConfig(loraConf)
+
+	return loraRadio, nil
+}
+
+func FirmwareVersion() string {
+	return "sx126x"
+}
+
+func Lorarx() ([]byte, error) {
+	return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
+}

examples/lora/lorawan/common/sx126x.go

@@ -0,0 +1,69 @@
+//go:build !stm32wlx && sx126x
+
+package common
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/sx126x"
+)
+
+const (
+	FREQ                      = 868100000
+	LORA_DEFAULT_RXTIMEOUT_MS = 1000
+	LORA_DEFAULT_TXTIMEOUT_MS = 5000
+)
+
+var (
+	loraRadio *sx126x.Device
+)
+
+var (
+	spi                        = machine.SPI0
+	nssPin, busyPin, dio1Pin   = machine.GP17, machine.GP10, machine.GP11
+	rxPin, txLowPin, txHighPin = machine.GP13, machine.GP12, machine.GP12
+)
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl(nssPin, busyPin, dio1Pin, rxPin, txLowPin, txHighPin)
+}
+
+// do sx126x setup here
+func SetupLora() (lora.Radio, error) {
+	loraRadio = sx126x.New(spi)
+	loraRadio.SetDeviceType(sx126x.DEVICE_TYPE_SX1262)
+
+	// Create radio controller for target
+	loraRadio.SetRadioController(newRadioControl())
+
+	if state := loraRadio.DetectDevice(); !state {
+		return nil, errRadioNotFound
+	}
+
+	loraConf := lora.Config{
+		Freq:           FREQ,
+		Bw:             lora.Bandwidth_500_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Ldr:            lora.LowDataRateOptimizeOff,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPrivate,
+		LoraTxPowerDBm: 20,
+	}
+
+	loraRadio.LoraConfig(loraConf)
+
+	return loraRadio, nil
+}
+
+func FirmwareVersion() string {
+	return "sx126x"
+}
+
+func Lorarx() ([]byte, error) {
+	return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
+}

examples/lora/lorawan/common/sx127x.go

@@ -0,0 +1,85 @@
+//go:build featherwing
+
+package common
+
+import (
+	"strconv"
+
+	"machine"
+
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/sx127x"
+)
+
+const (
+	FREQ                      = 868100000
+	LORA_DEFAULT_RXTIMEOUT_MS = 1000
+	LORA_DEFAULT_TXTIMEOUT_MS = 5000
+)
+
+var (
+	// We assume LoRa Featherwing module is connected to PyBadge:
+	rstPin    = machine.D11
+	csPin     = machine.D10
+	dio0Pin   = machine.D6
+	dio1Pin   = machine.D9
+	spi       = machine.SPI0
+	loraRadio *sx127x.Device
+)
+
+// do sx127x setup here
+func SetupLora() (lora.Radio, error) {
+	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	dio0Pin.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
+	dio1Pin.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
+	spi.Configure(machine.SPIConfig{Frequency: 500000, Mode: 0})
+
+	loraRadio = sx127x.New(spi, csPin, rstPin)
+	loraRadio.Reset()
+
+	if state := loraRadio.DetectDevice(); !state {
+		return nil, errRadioNotFound
+	}
+
+	// Setup DIO0 interrupt Handling
+	if err := dio0Pin.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
+		println("could not configure DIO0 pin interrupt:", err.Error())
+	}
+
+	// Setup DIO1 interrupt Handling
+	if err := dio1Pin.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
+		println("could not configure DIO1 pin interrupt:", err.Error())
+	}
+
+	// Prepare for Lora Operation
+	loraConf := lora.Config{
+		Freq:           FREQ,
+		Bw:             lora.Bandwidth_125_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPublic,
+		LoraTxPowerDBm: 20,
+	}
+
+	loraRadio.LoraConfig(loraConf)
+
+	return loraRadio, nil
+}
+
+func dioIrqHandler(machine.Pin) {
+	loraRadio.HandleInterrupt()
+}
+
+func FirmwareVersion() string {
+	v := loraRadio.GetVersion()
+	return "sx127x v" + strconv.Itoa(int(v))
+}
+
+func Lorarx() ([]byte, error) {
+	return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
+}

examples/lora/lorawan/common/version.go

@@ -0,0 +1,7 @@
+package common
+
+const VERSION = "0.0.1"
+
+func CurrentVersion() string {
+	return VERSION
+}

examples/sh1106/macropad_spi/main.go

@@ -0,0 +1,56 @@
+//go:build macropad_rp2040
+
+package main
+
+import (
+	"image/color"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/sh1106"
+)
+
+var (
+	display = sh1106.NewSPI(machine.SPI1, machine.OLED_DC, machine.OLED_RST, machine.OLED_CS)
+)
+
+func init() {
+	machine.SPI1.Configure(machine.SPIConfig{
+		Frequency: 48000000,
+	})
+	display.Configure(sh1106.Config{
+		Width:  128,
+		Height: 64,
+	})
+}
+
+func main() {
+
+	display.ClearDisplay()
+
+	x := int16(0)
+	y := int16(0)
+	deltaX := int16(1)
+	deltaY := int16(1)
+	for {
+		pixel := display.GetPixel(x, y)
+		c := color.RGBA{255, 255, 255, 255}
+		if pixel {
+			c = color.RGBA{0, 0, 0, 255}
+		}
+		display.SetPixel(x, y, c)
+		display.Display()
+
+		x += deltaX
+		y += deltaY
+
+		if x == 0 || x == 127 {
+			deltaX = -deltaX
+		}
+
+		if y == 0 || y == 63 {
+			deltaY = -deltaY
+		}
+		time.Sleep(1 * time.Millisecond)
+	}
+}

examples/sx126x/lora_continuous/lora_continuous.go

@@ -5,8 +5,7 @@ import (
 	"machine"
 	"time"
 
-	rfswitch "tinygo.org/x/drivers/examples/sx126x/rfswitch"
+	"tinygo.org/x/drivers/lora"
-
 	"tinygo.org/x/drivers/sx126x"
 )
 
@@ -23,12 +22,11 @@ func main() {
 	machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput})
 
 	// Create the driver
-	loraRadio = sx126x.New(machine.SPI3)
+	loraRadio = sx126x.New(spi)
 	loraRadio.SetDeviceType(sx126x.DEVICE_TYPE_SX1262)
 
-	// Create RF Switch
+	// Create radio controller for target
-	var radioSwitch rfswitch.CustomSwitch
+	loraRadio.SetRadioController(newRadioControl())
-	loraRadio.SetRfSwitch(radioSwitch)
 
 	state := loraRadio.DetectDevice()
 	if !state {
@@ -36,17 +34,17 @@ func main() {
 	}
 
 	// Prepare for Lora operation
-	loraConf := sx126x.LoraConfig{
+	loraConf := lora.Config{
 		Freq:           FREQ,
-		Bw:             sx126x.SX126X_LORA_BW_500_0,
+		Bw:             lora.Bandwidth_500_0,
-		Sf:             sx126x.SX126X_LORA_SF9,
+		Sf:             lora.SpreadingFactor9,
-		Cr:             sx126x.SX126X_LORA_CR_4_7,
+		Cr:             lora.CodingRate4_7,
-		HeaderType:     sx126x.SX126X_LORA_HEADER_EXPLICIT,
+		HeaderType:     lora.HeaderExplicit,
 		Preamble:       12,
-		Ldr:            sx126x.SX126X_LORA_LOW_DATA_RATE_OPTIMIZE_OFF,
+		Ldr:            lora.LowDataRateOptimizeOff,
-		Iq:             sx126x.SX126X_LORA_IQ_STANDARD,
+		Iq:             lora.IQStandard,
-		Crc:            sx126x.SX126X_LORA_CRC_ON,
+		Crc:            lora.CRCOn,
-		SyncWord:       sx126x.SX126X_LORA_MAC_PRIVATE_SYNCWORD,
+		SyncWord:       lora.SyncPrivate,
 		LoraTxPowerDBm: 14,
 	}
 	loraRadio.LoraConfig(loraConf)
@@ -75,6 +73,5 @@ func main() {
 
 		loraRadio.SetStandby()
 		time.Sleep(60 * time.Second)
-
 	}
 }

examples/sx126x/lora_continuous/radio.go

@@ -0,0 +1,19 @@
+//go:build !stm32wlx
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/sx126x"
+)
+
+var (
+	spi                        = machine.SPI0
+	nssPin, busyPin, dio1Pin   = machine.GP17, machine.GP10, machine.GP11
+	rxPin, txLowPin, txHighPin = machine.GP13, machine.GP12, machine.GP12
+)
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl(nssPin, busyPin, dio1Pin, rxPin, txLowPin, txHighPin)
+}

examples/sx126x/lora_continuous/radio_stm32wl.go

@@ -0,0 +1,15 @@
+//go:build stm32wlx
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/sx126x"
+)
+
+var spi = machine.SPI3
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl()
+}

examples/sx126x/lora_rxtx/lora_rxtx.go

@@ -4,13 +4,10 @@ package main
 // module will be in RX mode between two transmissions
 
 import (
-	"device/stm32"
 	"machine"
-	"runtime/interrupt"
 	"time"
 
-	rfswitch "tinygo.org/x/drivers/examples/sx126x/rfswitch"
+	"tinygo.org/x/drivers/lora"
-
 	"tinygo.org/x/drivers/sx126x"
 )
 
@@ -26,23 +23,19 @@ var (
 	txmsg     = []byte("Hello TinyGO")
 )
 
-// radioIntHandler will take care of radio interrupts
-func radioIntHandler(intr interrupt.Interrupt) {
-	loraRadio.HandleInterrupt()
-}
-
 func main() {
+	time.Sleep(3 * time.Second)
+
 	println("\n# TinyGo Lora RX/TX test")
 	println("# ----------------------")
 	machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput})
 
 	// Create the driver
-	loraRadio = sx126x.New(machine.SPI3)
+	loraRadio = sx126x.New(spi)
 	loraRadio.SetDeviceType(sx126x.DEVICE_TYPE_SX1262)
 
-	// Create RF Switch
+	// Create radio controller for target
-	var radioSwitch rfswitch.CustomSwitch
+	loraRadio.SetRadioController(newRadioControl())
-	loraRadio.SetRfSwitch(radioSwitch)
 
 	// Detect the device
 	state := loraRadio.DetectDevice()
@@ -50,21 +43,17 @@ func main() {
 		panic("sx126x not detected.")
 	}
 
-	// Add interrupt handler for Radio IRQs
+	loraConf := lora.Config{
-	intr := interrupt.New(stm32.IRQ_Radio_IRQ_Busy, radioIntHandler)
-	intr.Enable()
-
-	loraConf := sx126x.LoraConfig{
 		Freq:           FREQ,
-		Bw:             sx126x.SX126X_LORA_BW_500_0,
+		Bw:             lora.Bandwidth_500_0,
-		Sf:             sx126x.SX126X_LORA_SF9,
+		Sf:             lora.SpreadingFactor9,
-		Cr:             sx126x.SX126X_LORA_CR_4_7,
+		Cr:             lora.CodingRate4_7,
-		HeaderType:     sx126x.SX126X_LORA_HEADER_EXPLICIT,
+		HeaderType:     lora.HeaderExplicit,
 		Preamble:       12,
-		Ldr:            sx126x.SX126X_LORA_LOW_DATA_RATE_OPTIMIZE_OFF,
+		Ldr:            lora.LowDataRateOptimizeOff,
-		Iq:             sx126x.SX126X_LORA_IQ_STANDARD,
+		Iq:             lora.IQStandard,
-		Crc:            sx126x.SX126X_LORA_CRC_ON,
+		Crc:            lora.CRCOn,
-		SyncWord:       sx126x.SX126X_LORA_MAC_PRIVATE_SYNCWORD,
+		SyncWord:       lora.SyncPrivate,
 		LoraTxPowerDBm: 20,
 	}
 
@@ -72,23 +61,20 @@ func main() {
 
 	var count uint
 	for {
-		tStart := time.Now()
+		start := time.Now()
-
-		// Blocking RX for LORA_DEFAULT_RXTIMEOUT_MS
-		println("Start Lora RX for 10 sec")
-		for int(time.Now().Sub(tStart).Seconds()) < 10 {
-			buf, err := loraRadio.LoraRx(LORA_DEFAULT_RXTIMEOUT_MS)
 
+		println("main: Receiving Lora for 10 seconds")
+		for time.Since(start) < 10*time.Second {
+			buf, err := loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
 			if err != nil {
 				println("RX Error: ", err)
 			} else if buf != nil {
 				println("Packet Received: len=", len(buf), string(buf))
 			}
 		}
-		println("END Lora RX")
+		println("main: End Lora RX")
-
+		println("LORA TX size=", len(txmsg), " -> ", string(txmsg))
-		println("LORA TX size=", len(txmsg))
+		err := loraRadio.Tx(txmsg, LORA_DEFAULT_TXTIMEOUT_MS)
-		err := loraRadio.LoraTx(txmsg, LORA_DEFAULT_TXTIMEOUT_MS)
 		if err != nil {
 			println("TX Error:", err)
 		}

examples/sx126x/lora_rxtx/radio.go

@@ -0,0 +1,29 @@
+//go:build !stm32wlx
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/sx126x"
+)
+
+var (
+	spi                        = machine.SPI1
+	nssPin, busyPin, dio1Pin   = machine.GP13, machine.GP6, machine.GP7
+	rxPin, txLowPin, txHighPin = machine.GP9, machine.GP8, machine.GP8
+)
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl(nssPin, busyPin, dio1Pin, rxPin, txLowPin, txHighPin)
+}
+
+func init() {
+	spi.Configure(machine.SPIConfig{
+		Mode:      0,
+		Frequency: 8 * 1e6,
+		SDO:       machine.SPI1_SDO_PIN,
+		SDI:       machine.SPI1_SDI_PIN,
+		SCK:       machine.SPI1_SCK_PIN,
+	})
+}

examples/sx126x/lora_rxtx/radio_stm32wl.go

@@ -0,0 +1,15 @@
+//go:build stm32wlx
+
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/sx126x"
+)
+
+var spi = machine.SPI3
+
+func newRadioControl() sx126x.RadioController {
+	return sx126x.NewRadioControl()
+}

examples/sx126x/rfswitch/gnse.go

@@ -1,60 +0,0 @@
-//go:build gnse
-
-/*
-Generic Node Sensor Edition
-RFSwitch
-
-Disable Switch   :  PB8=OFF PA0=OFF  PA1=OFF
-Enable RX        :  PB8=ON  PA0=ON   PA1=OFF
-Enable TX RFO LP :  PB8=ON  PA0=ON   PA1=ON
-Enable TX RFO HP :  PB8=ON  PA0=OFF  PA1=ON
-*/
-package rfswitch
-
-import (
-	"machine"
-
-	"tinygo.org/x/drivers/sx126x"
-)
-
-type CustomSwitch struct {
-}
-
-var (
-	rfstate int
-)
-
-func (s CustomSwitch) InitRFSwitch() {
-	machine.RF_FE_CTRL1.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	machine.RF_FE_CTRL2.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	machine.RF_FE_CTRL3.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	rfstate = -1 //Unknown
-}
-
-func (s CustomSwitch) SetRfSwitchMode(mode int) error {
-	if mode == rfstate {
-		return nil
-	}
-
-	switch mode {
-
-	case sx126x.RFSWITCH_TX_HP:
-		machine.RF_FE_CTRL1.Set(false)
-		machine.RF_FE_CTRL2.Set(true)
-		machine.RF_FE_CTRL3.Set(true)
-
-	case sx126x.RFSWITCH_TX_LP:
-		machine.RF_FE_CTRL1.Set(true)
-		machine.RF_FE_CTRL2.Set(true)
-		machine.RF_FE_CTRL3.Set(true)
-
-	case sx126x.RFSWITCH_RX:
-		machine.RF_FE_CTRL1.Set(true)
-		machine.RF_FE_CTRL2.Set(false)
-		machine.RF_FE_CTRL3.Set(true)
-	}
-
-	rfstate = mode
-
-	return nil
-}

examples/sx126x/rfswitch/lorae5.go

@@ -1,42 +0,0 @@
-//go:build lorae5
-
-package radio
-
-/*
-/!\ LoRa-E5 module ONLY transmits through RFO_HP:
-
-	Receive: PA4=1, PA5=0
-	Transmit(high output power, SMPS mode): PA4=0, PA5=1
-
-*/
-
-import (
-	"errors"
-	"machine"
-
-	"tinygo.org/x/drivers/sx126x"
-)
-
-type CustomSwitch struct {
-}
-
-func (s CustomSwitch) InitRFSwitch() {
-	machine.PA4.Configure(machine.PinConfig{Mode: machine.PinOutput})
-	machine.PB5.Configure(machine.PinConfig{Mode: machine.PinOutput})
-}
-
-func (s CustomSwitch) SetRfSwitchMode(mode int) error {
-	switch mode {
-
-	case sx126x.RFSWITCH_RX:
-		machine.PA4.Set(true)
-		machine.PB5.Set(false)
-	case sx126x.RFSWITCH_TX_LP:
-		errors.New("RFSWITCH_TX_LP not supported ")
-	case sx126x.RFSWITCH_TX_HP:
-		machine.PA4.Set(false)
-		machine.PB5.Set(true)
-
-	}
-	return nil
-}

examples/sx127x/lora_rxtx/lora_rxtx.go

@@ -0,0 +1,106 @@
+package main
+
+// This example code demonstrates Lora RX/TX With SX127x driver
+// You need to connect SPI, RST, CS, DIO0 (aka IRQ) and DIO1 to use.
+
+import (
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/sx127x"
+)
+
+const FREQ = 868100000
+
+const (
+	LORA_DEFAULT_RXTIMEOUT_MS = 1000
+	LORA_DEFAULT_TXTIMEOUT_MS = 5000
+)
+
+var (
+	loraRadio *sx127x.Device
+	txmsg     = []byte("Hello TinyGO")
+
+	// We assume LoRa Featherwing module is connected to PyBadge:
+	SX127X_PIN_RST  = machine.D11
+	SX127X_PIN_CS   = machine.D10
+	SX127X_PIN_DIO0 = machine.D6
+	SX127X_PIN_DIO1 = machine.D9
+	SX127X_SPI      = machine.SPI0
+)
+
+func dioIrqHandler(machine.Pin) {
+	loraRadio.HandleInterrupt()
+}
+
+func main() {
+	time.Sleep(5 * time.Second)
+	println("\n# TinyGo Lora RX/TX test")
+	println("# ----------------------")
+	machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	SX127X_PIN_RST.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	SX127X_PIN_CS.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	SX127X_PIN_DIO0.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
+	SX127X_PIN_DIO1.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
+	SX127X_SPI.Configure(machine.SPIConfig{Frequency: 500000, Mode: 0})
+
+	println("main: create and start SX127x driver")
+	loraRadio = sx127x.New(SX127X_SPI, SX127X_PIN_CS, SX127X_PIN_RST)
+	loraRadio.Reset()
+	state := loraRadio.DetectDevice()
+	if !state {
+		panic("main: sx127x NOT FOUND !!!")
+	} else {
+		println("main: sx127x found")
+	}
+
+	// Setup DIO0 interrupt Handling
+	if err := SX127X_PIN_DIO0.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
+		println("could not configure DIO0 pin interrupt:", err.Error())
+	}
+
+	// Setup DIO1 interrupt Handling
+	if err := SX127X_PIN_DIO1.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
+		println("could not configure DIO1 pin interrupt:", err.Error())
+	}
+
+	// Prepare for Lora Operation
+	loraConf := lora.Config{
+		Freq:           FREQ,
+		Bw:             lora.Bandwidth_500_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPrivate,
+		LoraTxPowerDBm: 20,
+	}
+
+	loraRadio.LoraConfig(loraConf)
+
+	var count uint
+	for {
+		tStart := time.Now()
+
+		println("main: Receiving Lora for 10 seconds")
+		for time.Since(tStart) < 10*time.Second {
+			buf, err := loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
+			if err != nil {
+				println("RX Error: ", err)
+			} else if buf != nil {
+				println("Packet Received: len=", len(buf), string(buf))
+			}
+		}
+		println("main: End Lora RX")
+		println("LORA TX size=", len(txmsg), " -> ", string(txmsg))
+		err := loraRadio.Tx(txmsg, LORA_DEFAULT_TXTIMEOUT_MS)
+		if err != nil {
+			println("TX Error:", err)
+		}
+		count++
+	}
+
+}

gps/gps.go

@@ -13,6 +13,39 @@ import (
 var (
 	errInvalidNMEASentenceLength = errors.New("invalid NMEA sentence length")
 	errInvalidNMEAChecksum       = errors.New("invalid NMEA sentence checksum")
+	errEmptyNMEASentence         = errors.New("cannot parse empty NMEA sentence")
+	errUnknownNMEASentence       = errors.New("unsupported NMEA sentence type")
+	errInvalidGGASentence        = errors.New("invalid GGA NMEA sentence")
+	errInvalidRMCSentence        = errors.New("invalid RMC NMEA sentence")
+	errInvalidGLLSentence        = errors.New("invalid GLL NMEA sentence")
+)
+
+type GPSError struct {
+	Err      error
+	Info     string
+	Sentence string
+}
+
+func newGPSError(err error, sentence string, info string) GPSError {
+	return GPSError{
+		Info:     info,
+		Err:      err,
+		Sentence: sentence,
+	}
+}
+
+func (ge GPSError) Error() string {
+	return ge.Err.Error() + " " + ge.Info + " " + ge.Sentence
+}
+
+func (ge GPSError) Unwrap() error {
+	return ge.Err
+}
+
+const (
+	minimumNMEALength = 7
+	startingDelimiter = '$'
+	checksumDelimiter = '*'
 )
 
 // Device wraps a connection to a GPS device.
@@ -60,11 +93,11 @@ func (gps *Device) readNextSentence() (sentence string) {
 	gps.sentence.Reset()
 	var b byte = ' '
 
-	for b != '$' {
+	for b != startingDelimiter {
 		b = gps.readNextByte()
 	}
 
-	for b != '*' {
+	for b != checksumDelimiter {
 		gps.sentence.WriteByte(b)
 		b = gps.readNextByte()
 	}
@@ -126,17 +159,24 @@ func (gps *Device) WriteBytes(bytes []byte) {
 }
 
 // validSentence checks if a sentence has been received uncorrupted
+// For example, a valid NMEA sentence such as this:
+// $GPGLL,3751.65,S,14507.36,E*77
+// It has to start with a '$' character.
+// It has to have a 5 character long sentence identifier.
+// It has to end with a '*' character following by a checksum.
 func validSentence(sentence string) error {
-	if len(sentence) < 4 || sentence[0] != '$' || sentence[len(sentence)-3] != '*' {
+	if len(sentence) < minimumNMEALength || sentence[0] != startingDelimiter || sentence[len(sentence)-3] != checksumDelimiter {
 		return errInvalidNMEASentenceLength
 	}
 	var cs byte = 0
 	for i := 1; i < len(sentence)-3; i++ {
 		cs ^= sentence[i]
 	}
-	checksum := hex.EncodeToString([]byte{cs})
+	checksum := strings.ToUpper(hex.EncodeToString([]byte{cs}))
-	if (checksum[0] != sentence[len(sentence)-2]) || (checksum[1] != sentence[len(sentence)-1]) {
+	if checksum != sentence[len(sentence)-2:len(sentence)] {
-		return errInvalidNMEAChecksum
+		return newGPSError(errInvalidNMEAChecksum, sentence,
+			"expected "+sentence[len(sentence)-2:len(sentence)]+
+				" got "+checksum)
 	}
 
 	return nil

gps/gpsparser.go

@@ -1,19 +1,11 @@
 package gps
 
 import (
-	"errors"
 	"strconv"
 	"strings"
 	"time"
 )
 
-var (
-	errEmptyNMEASentence   = errors.New("cannot parse empty NMEA sentence")
-	errUnknownNMEASentence = errors.New("unsupported NMEA sentence type")
-	errInvalidGGASentence  = errors.New("invalid GGA NMEA sentence")
-	errInvalidRMCSentence  = errors.New("invalid RMC NMEA sentence")
-)
-
 // Parser for GPS NMEA sentences.
 type Parser struct {
 }
@@ -51,43 +43,63 @@ func NewParser() Parser {
 }
 
 // Parse parses a NMEA sentence looking for fix info.
-func (parser *Parser) Parse(sentence string) (fix Fix, err error) {
+func (parser *Parser) Parse(sentence string) (Fix, error) {
+	var fix Fix
 	if sentence == "" {
-		err = errEmptyNMEASentence
+		return fix, errEmptyNMEASentence
-		return
+	}
+	if len(sentence) < 6 {
+		return fix, errInvalidNMEASentenceLength
 	}
 	typ := sentence[3:6]
 	switch typ {
 	case "GGA":
+		// https://docs.novatel.com/OEM7/Content/Logs/GPGGA.htm
 		fields := strings.Split(sentence, ",")
 		if len(fields) != 15 {
-			err = errInvalidGGASentence
+			return fix, errInvalidGGASentence
-			return
 		}
 
-		fix.Altitude = findAltitude(fields[9])
-		fix.Satellites = findSatellites(fields[7])
-		fix.Longitude = findLongitude(fields[4], fields[5])
-		fix.Latitude = findLatitude(fields[2], fields[3])
 		fix.Time = findTime(fields[1])
+		fix.Latitude = findLatitude(fields[2], fields[3])
+		fix.Longitude = findLongitude(fields[4], fields[5])
+		fix.Satellites = findSatellites(fields[7])
+		fix.Altitude = findAltitude(fields[9])
 		fix.Valid = (fix.Altitude != -99999) && (fix.Satellites > 0)
+
+		return fix, nil
+	case "GLL":
+		// https://docs.novatel.com/OEM7/Content/Logs/GPGLL.htm
+		fields := strings.Split(sentence, ",")
+		if len(fields) != 8 {
+			return fix, errInvalidGLLSentence
+		}
+
+		fix.Latitude = findLatitude(fields[1], fields[2])
+		fix.Longitude = findLongitude(fields[3], fields[4])
+		fix.Time = findTime(fields[5])
+
+		fix.Valid = (fields[6] == "A")
+
+		return fix, nil
 	case "RMC":
+		// https://docs.novatel.com/OEM7/Content/Logs/GPRMC.htm
 		fields := strings.Split(sentence, ",")
 		if len(fields) != 13 {
-			err = errInvalidRMCSentence
+			return fix, errInvalidRMCSentence
-			return
 		}
 
-		fix.Longitude = findLongitude(fields[5], fields[6])
-		fix.Latitude = findLatitude(fields[3], fields[4])
 		fix.Time = findTime(fields[1])
+		fix.Valid = (fields[2] == "A")
+		fix.Latitude = findLatitude(fields[3], fields[4])
+		fix.Longitude = findLongitude(fields[5], fields[6])
 		fix.Speed = findSpeed(fields[7])
 		fix.Heading = findHeading(fields[8])
-		fix.Valid = (len(fields[2]) > 0 && fields[2][0:1] == "A")
+
-	default:
+		return fix, nil
-		err = errUnknownNMEASentence
 	}
-	return
+
+	return fix, newGPSError(errUnknownNMEASentence, sentence, typ)
 }
 
 // findTime returns the time from an NMEA sentence:
@@ -100,7 +112,10 @@ func findTime(val string) time.Time {
 	h, _ := strconv.ParseInt(val[0:2], 10, 8)
 	m, _ := strconv.ParseInt(val[2:4], 10, 8)
 	s, _ := strconv.ParseInt(val[4:6], 10, 8)
-	ms, _ := strconv.ParseInt(val[7:10], 10, 16)
+	ms := int64(0)
+	if len(val) > 6 {
+		ms, _ = strconv.ParseInt(val[7:], 10, 16)
+	}
 	t := time.Date(0, 0, 0, int(h), int(m), int(s), int(ms), time.UTC)
 
 	return t
@@ -120,11 +135,11 @@ func findAltitude(val string) int32 {
 // $--GGA,,ddmm.mmmmm,x,,,,,,,,,,,*hh
 func findLatitude(val, hemi string) float32 {
 	if len(val) > 8 {
-		var dd = val[0:2]
+		dd := val[0:2]
-		var mm = val[2:]
+		mm := val[2:]
-		var d, _ = strconv.ParseFloat(dd, 32)
+		d, _ := strconv.ParseFloat(dd, 32)
-		var m, _ = strconv.ParseFloat(mm, 32)
+		m, _ := strconv.ParseFloat(mm, 32)
-		var v = float32(d + (m / 60))
+		v := float32(d + (m / 60))
 		if hemi == "S" {
 			v *= -1
 		}
@@ -133,7 +148,7 @@ func findLatitude(val, hemi string) float32 {
 	return 0.0
 }
 
-// findLatitude returns the longitude from an NMEA sentence:
+// findLongitude returns the longitude from an NMEA sentence:
 // $--GGA,,,,dddmm.mmmmm,x,,,,,,,,,*hh
 func findLongitude(val, hemi string) float32 {
 	if len(val) > 8 {

gps/gpsparser_test.go

@@ -0,0 +1,97 @@
+package gps
+
+import (
+	"testing"
+	"time"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestParseUnknownSentence(t *testing.T) {
+	c := qt.New(t)
+
+	p := NewParser()
+
+	val := "$GPGSV,3,1,09,07,14,317,22,08,31,284,25,10,32,133,39,16,85,232,29*7F"
+	_, err := p.Parse(val)
+	c.Assert(err.Error(), qt.Contains, "unsupported NMEA sentence type")
+}
+
+func TestParseGGA(t *testing.T) {
+	c := qt.New(t)
+
+	p := NewParser()
+
+	val := "$GPGGA,115739.00,4158.8441367,N,09147.4416929,"
+	fix, err := p.Parse(val)
+	if err != errInvalidGGASentence {
+		t.Error("should have errInvalidGGASentence error")
+	}
+
+	val = "$GPGGA,115739.00,4158.8441367,N,09147.4416929,W,4,13,0.9,255.747,M,-32.00,M,01,0000*6E"
+	fix, err = p.Parse(val)
+	if err != nil {
+		t.Error("should have parsed")
+	}
+	c.Assert(fix.Latitude, qt.Equals, float32(41.980735778808594))
+	c.Assert(fix.Longitude, qt.Equals, float32(-91.79069519042969))
+	c.Assert(fix.Altitude, qt.Equals, int32(255))
+}
+
+func TestParseGLL(t *testing.T) {
+	c := qt.New(t)
+
+	p := NewParser()
+
+	val := "$GPGLL,3953.88008971,N,10506.7531891"
+	_, err := p.Parse(val)
+	if err != errInvalidGLLSentence {
+		t.Error("should have errInvalidGLLSentence error")
+	}
+
+	val = "$GPGLL,5109.0262317,N,11401.8407304,W,202725.00,A,D*79"
+	fix, err := p.Parse(val)
+	if err != nil {
+		t.Error("should have parsed")
+	}
+
+	c.Assert(fix.Latitude, qt.Equals, float32(51.15043640136719))
+	c.Assert(fix.Longitude, qt.Equals, float32(-114.03067779541016))
+}
+
+func TestParseRMC(t *testing.T) {
+	c := qt.New(t)
+
+	p := NewParser()
+
+	val := "$GPRMC,203522.00,A,5109.0262308,N,11401.8407342,"
+	_, err := p.Parse(val)
+	if err != errInvalidRMCSentence {
+		t.Error("should have errInvalidRMCSentence error")
+	}
+
+	val = "$GPRMC,203522.00,A,5109.0262308,N,11401.8407342,W,0.004,133.4,130522,0.0,E,D*2B"
+	fix, err := p.Parse(val)
+	if err != nil {
+		t.Error("should have parsed")
+	}
+
+	c.Assert(fix.Latitude, qt.Equals, float32(51.15043640136719))
+	c.Assert(fix.Longitude, qt.Equals, float32(-114.03067779541016))
+}
+
+func TestTime(t *testing.T) {
+	c := qt.New(t)
+
+	val := ""
+	tm := findTime(val)
+	c.Assert(tm, qt.Equals, time.Time{})
+
+	val = "225446"
+	tm = findTime(val)
+	c.Assert(tm, qt.Equals, time.Date(0, 0, 0, 22, 54, 46, 0, time.UTC))
+
+	val = "124326.02752"
+	tm = findTime(val)
+	c.Assert(tm, qt.Equals, time.Date(0, 0, 0, 12, 43, 26, 2752, time.UTC))
+}

lora/config.go

@@ -0,0 +1,78 @@
+package lora
+
+import "errors"
+
+// Config holds the LoRa configuration parameters
+type Config struct {
+	Freq           uint32 // Frequency
+	Cr             uint8  // Coding Rate
+	Sf             uint8  // Spread Factor
+	Bw             uint8  // Bandwidth
+	Ldr            uint8  // Low Data Rate
+	Preamble       uint16 // PreambleLength
+	SyncWord       uint16 // Sync Word
+	HeaderType     uint8  // Header : Implicit/explicit
+	Crc            uint8  // CRC : Yes/No
+	Iq             uint8  // iq : Standard/inverted
+	LoraTxPowerDBm int8   // Tx power in Dbm
+}
+
+var (
+	ErrUndefinedLoraConf = errors.New("Undefined Lora configuration")
+)
+
+const (
+	SpreadingFactor5  = 0x05
+	SpreadingFactor6  = 0x06
+	SpreadingFactor7  = 0x07
+	SpreadingFactor8  = 0x08
+	SpreadingFactor9  = 0x09
+	SpreadingFactor10 = 0x0A
+	SpreadingFactor11 = 0x0B
+	SpreadingFactor12 = 0x0C
+)
+
+const (
+	CodingRate4_5 = 0x01 //  7     0     LoRa coding rate: 4/5
+	CodingRate4_6 = 0x02 //  7     0                       4/6
+	CodingRate4_7 = 0x03 //  7     0                       4/7
+	CodingRate4_8 = 0x04 //  7     0                       4/8
+)
+
+const (
+	HeaderExplicit = 0x00 //  7     0     LoRa header mode: explicit
+	HeaderImplicit = 0x01 //  7     0                       implicit
+)
+
+const (
+	LowDataRateOptimizeOff = 0x00 //  7     0     LoRa low data rate optimization: disabled
+	LowDataRateOptimizeOn  = 0x01 //  7     0                                      enabled
+)
+
+const (
+	CRCOff = 0x00 //  7     0     LoRa CRC mode: disabled
+	CRCOn  = 0x01 //  7     0                    enabled
+)
+
+const (
+	IQStandard = 0x00 //  7     0     LoRa IQ setup: standard
+	IQInverted = 0x01 //  7     0                    inverted
+)
+
+const (
+	Bandwidth_7_8   = iota // 7.8 kHz
+	Bandwidth_10_4         // 10.4 kHz
+	Bandwidth_15_6         // 15.6 kHz
+	Bandwidth_20_8         // 20.8 kHz
+	Bandwidth_31_25        // 31.25 kHz
+	Bandwidth_41_7         // 41.7 kHz
+	Bandwidth_62_5         // 62.5 kHz
+	Bandwidth_125_0        // 125.0 kHz
+	Bandwidth_250_0        // 250.0 kHz
+	Bandwidth_500_0        // 500.0 kHz
+)
+
+const (
+	SyncPublic = iota
+	SyncPrivate
+)

lora/lorawan/adaptor.go

@@ -0,0 +1,101 @@
+package lorawan
+
+import (
+	"errors"
+
+	"tinygo.org/x/drivers/lora"
+)
+
+var (
+	ErrNoJoinAcceptReceived = errors.New("no JoinAccept packet received")
+	ErrNoRadioAttached      = errors.New("no LoRa radio attached")
+	ErrInvalidEuiLength     = errors.New("invalid EUI length")
+	ErrInvalidAppKeyLength  = errors.New("invalid AppKey length")
+	ErrInvalidPacketLength  = errors.New("invalid packet length")
+	ErrInvalidDevAddrLength = errors.New("invalid DevAddr length")
+	ErrInvalidMic           = errors.New("invalid Mic")
+	ErrFrmPayloadTooLarge   = errors.New("FRM payload too large")
+	ErrInvalidNetIDLength   = errors.New("invalid NetID length")
+	ErrInvalidNwkSKeyLength = errors.New("invalid NwkSKey length")
+	ErrInvalidAppSKeyLength = errors.New("invalid AppSKey length")
+)
+
+const (
+	LORA_TX_TIMEOUT = 2000
+	LORA_RX_TIMEOUT = 5000
+)
+
+var (
+	ActiveRadio lora.Radio
+	Retries     = 15
+)
+
+func UseRadio(r lora.Radio) {
+	if ActiveRadio != nil {
+		panic("lorawan.ActiveRadio is already set")
+	}
+	ActiveRadio = r
+}
+
+func Join(otaa *Otaa, session *Session) error {
+	var resp []uint8
+
+	if ActiveRadio == nil {
+		return ErrNoRadioAttached
+	}
+
+	otaa.Init()
+
+	// Send join packet
+	payload, err := otaa.GenerateJoinRequest()
+	if err != nil {
+		return err
+	}
+
+	ActiveRadio.SetCrc(true)
+	ActiveRadio.SetIqMode(0) // IQ Standard
+	ActiveRadio.Tx(payload, LORA_TX_TIMEOUT)
+	if err != nil {
+		return err
+	}
+
+	// Wait for JoinAccept
+	ActiveRadio.SetIqMode(1) // IQ Inverted
+	for i := 0; i < Retries; i++ {
+		resp, err = ActiveRadio.Rx(LORA_RX_TIMEOUT)
+		if err != nil {
+			return err
+		}
+		if resp != nil {
+			break
+		}
+	}
+	if resp == nil {
+		return ErrNoJoinAcceptReceived
+	}
+
+	err = otaa.DecodeJoinAccept(resp, session)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func SendUplink(data []uint8, session *Session) error {
+	payload, err := session.GenMessage(0, []byte(data))
+	if err != nil {
+		return err
+	}
+	ActiveRadio.SetCrc(true)
+	ActiveRadio.SetIqMode(0) // IQ Standard
+	ActiveRadio.Tx(payload, LORA_TX_TIMEOUT)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func ListenDownlink() error {
+	return nil
+}

lora/lorawan/bytes.go

@@ -0,0 +1,20 @@
+package lorawan
+
+import "crypto/rand"
+
+// reverseBytes reverses order of a given byte slice
+func reverseBytes(s []byte) []byte {
+	result := make([]byte, len(s))
+	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
+		result[i], result[j] = s[j], s[i]
+	}
+	return result
+}
+
+// GetRand16 returns 2 random bytes
+func GetRand16() ([2]uint8, error) {
+	var randomBytes [2]byte
+	_, err := rand.Read(randomBytes[:])
+
+	return randomBytes, err
+}

lora/lorawan/cmac.go

@@ -0,0 +1,253 @@
+package lorawan
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"hash"
+	"unsafe"
+)
+
+type cmacHash struct {
+	ciph cipher.Block
+	k1   []byte
+	k2   []byte
+	data []byte
+	x    []byte
+}
+
+const (
+	Size      = aes.BlockSize
+	blockSize = Size
+)
+
+var (
+	subkeyZero []byte
+	subkeyRb   []byte
+)
+
+func init() {
+	subkeyZero = bytes.Repeat([]byte{0x00}, blockSize)
+	subkeyRb = append(bytes.Repeat([]byte{0x00}, blockSize-1), 0x87)
+}
+
+// New returns an AES-CMAC hash using the supplied key. The key must be 16, 24,
+// or 32 bytes long.
+func NewCmac(key []byte) (hash.Hash, error) {
+	// Create a cipher.
+	ciph, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	// Set up the hash object.
+	h := &cmacHash{ciph: ciph}
+	h.k1, h.k2 = generateSubkeys(ciph)
+	h.Reset()
+	return h, nil
+}
+
+func Xor(dst []byte, a []byte, b []byte) error {
+	if len(dst) != len(a) || len(a) != len(b) {
+		panic("crypto/Xor: bad length")
+	}
+	for i, _ := range a {
+		dst[i] = a[i] ^ b[i]
+	}
+	return nil
+}
+
+func (h *cmacHash) Reset() {
+	h.data = h.data[:0]
+	h.x = make([]byte, blockSize)
+}
+
+func (h *cmacHash) BlockSize() int {
+	return h.ciph.BlockSize()
+}
+
+func (h *cmacHash) Size() int {
+	return h.ciph.BlockSize()
+}
+
+func (h *cmacHash) Sum(b []byte) []byte {
+	dataLen := len(h.data)
+
+	// We should have at most one block left.
+	if dataLen > blockSize {
+		panic("cmacHash err1")
+	}
+
+	// Calculate M_last.
+	mLast := make([]byte, blockSize)
+	if dataLen == blockSize {
+		Xor(mLast, h.data, h.k1)
+	} else {
+		// TODO(jacobsa): Accept a destination buffer in common.PadBlock and
+		// simplify this code.
+		Xor(mLast, PadBlock(h.data), h.k2)
+	}
+
+	y := make([]byte, blockSize)
+	Xor(y, mLast, h.x)
+
+	result := make([]byte, blockSize)
+	h.ciph.Encrypt(result, y)
+
+	b = append(b, result...)
+	return b
+}
+
+func (h *cmacHash) Write(p []byte) (n int, err error) {
+	n = len(p)
+
+	// First step: consume enough data to expand h.data to a full block, if
+	// possible.
+	{
+		toConsume := blockSize - len(h.data)
+		if toConsume > len(p) {
+			toConsume = len(p)
+		}
+
+		h.data = append(h.data, p[:toConsume]...)
+		p = p[toConsume:]
+	}
+
+	// If there's no data left in p, it means h.data might not be a full block.
+	// Even if it is, we're not sure it's the final block, which we must treat
+	// specially. So we must stop here.
+	if len(p) == 0 {
+		return
+	}
+
+	// h.data is a full block and is not the last; process it.
+	h.writeBlocks(h.data)
+	h.data = h.data[:0]
+
+	// Consume any further full blocks in p that we're sure aren't the last. Note
+	// that we're sure that len(p) is greater than zero here.
+	blocksToProcess := (len(p) - 1) / blockSize
+	bytesToProcess := blocksToProcess * blockSize
+
+	h.writeBlocks(p[:bytesToProcess])
+	p = p[bytesToProcess:]
+
+	// Store the rest for later.
+	h.data = append(h.data, p...)
+
+	return
+}
+
+func (h *cmacHash) writeBlocks(p []byte) {
+	y := make([]byte, blockSize)
+
+	for off := 0; off < len(p); off += blockSize {
+		block := p[off : off+blockSize]
+
+		xorBlock(
+			unsafe.Pointer(&y[0]),
+			unsafe.Pointer(&h.x[0]),
+			unsafe.Pointer(&block[0]))
+
+		h.ciph.Encrypt(h.x, y)
+	}
+
+	return
+}
+
+func xorBlock(
+	dstPtr unsafe.Pointer,
+	aPtr unsafe.Pointer,
+	bPtr unsafe.Pointer) {
+	// Check assumptions. (These are compile-time constants, so this should
+	// compile out.)
+	const wordSize = unsafe.Sizeof(uintptr(0))
+	if blockSize != 4*wordSize {
+		panic("xorBlock err1")
+	}
+
+	// Convert.
+	a := (*[4]uintptr)(aPtr)
+	b := (*[4]uintptr)(bPtr)
+	dst := (*[4]uintptr)(dstPtr)
+
+	// Compute.
+	dst[0] = a[0] ^ b[0]
+	dst[1] = a[1] ^ b[1]
+	dst[2] = a[2] ^ b[2]
+	dst[3] = a[3] ^ b[3]
+}
+
+func PadBlock(block []byte) []byte {
+	blockLen := len(block)
+	if blockLen >= aes.BlockSize {
+		panic("PadBlock input must be less than 16 bytes.")
+	}
+
+	result := make([]byte, aes.BlockSize)
+	copy(result, block)
+	result[blockLen] = 0x80
+
+	return result
+}
+
+// Given the supplied cipher, whose block size must be 16 bytes, return two
+// subkeys that can be used in MAC generation. See section 5.3 of NIST SP
+// 800-38B. Note that the other NIST-approved block size of 8 bytes is not
+// supported by this function.
+func generateSubkeys(ciph cipher.Block) (k1 []byte, k2 []byte) {
+	if ciph.BlockSize() != blockSize {
+		panic("generateSubkeys requires a cipher with a block size of 16 bytes.")
+	}
+
+	// Step 1
+	l := make([]byte, blockSize)
+	ciph.Encrypt(l, subkeyZero)
+
+	// Step 2: Derive the first subkey.
+	if Msb(l) == 0 {
+		// TODO(jacobsa): Accept a destination buffer in ShiftLeft and then hoist
+		// the allocation in the else branch below.
+		k1 = ShiftLeft(l)
+	} else {
+		k1 = make([]byte, blockSize)
+		Xor(k1, ShiftLeft(l), subkeyRb)
+	}
+
+	// Step 3: Derive the second subkey.
+	if Msb(k1) == 0 {
+		k2 = ShiftLeft(k1)
+	} else {
+		k2 = make([]byte, blockSize)
+		Xor(k2, ShiftLeft(k1), subkeyRb)
+	}
+
+	return
+}
+
+func ShiftLeft(b []byte) []byte {
+	l := len(b)
+	if l == 0 {
+		panic("shiftLeft requires a non-empty buffer.")
+	}
+
+	output := make([]byte, l)
+
+	overflow := byte(0)
+	for i := int(l - 1); i >= 0; i-- {
+		output[i] = b[i] << 1
+		output[i] |= overflow
+		overflow = (b[i] & 0x80) >> 7
+	}
+
+	return output
+}
+
+// Msb returns the most significant bit of the supplied data (which must be
+// non-empty). This is the MSB(L) function of RFC 4493.
+func Msb(buf []byte) uint8 {
+	if len(buf) == 0 {
+		panic("msb requires non-empty buffer.")
+	}
+
+	return buf[0] >> 7
+}

lora/lorawan/mic.go

@@ -0,0 +1,38 @@
+package lorawan
+
+import (
+	"encoding/binary"
+)
+
+// genPayloadMIC computes MIC given the payload and the key
+func genPayloadMIC(payload []uint8, key [16]uint8) [4]uint8 {
+	var mic [4]uint8
+	hash, _ := NewCmac(key[:])
+	hash.Write(payload)
+	hb := hash.Sum([]byte{})
+	copy(mic[:], hb[0:4])
+	return mic
+}
+
+func calcMessageMIC(payload []uint8, key [16]uint8, dir uint8, addr []byte, fCnt uint32, lenMessage uint8) [4]uint8 {
+	var b0 []byte
+	b0 = append(b0, 0x49, 0x00, 0x00, 0x00, 0x00)
+	b0 = append(b0, dir)
+	b0 = append(b0, addr[:]...)
+	var b [4]byte
+	binary.LittleEndian.PutUint32(b[:], fCnt)
+	b0 = append(b0, b[:]...)
+	b0 = append(b0, 0x00)
+	b0 = append(b0, lenMessage)
+
+	var full []byte
+	full = append(full, b0...)
+	full = append(full, payload...)
+
+	var mic [4]uint8
+	hash, _ := NewCmac(key[:])
+	hash.Write(full)
+	hb := hash.Sum([]byte{})
+	copy(mic[:], hb[0:4])
+	return mic
+}

lora/lorawan/otaa.go

@@ -0,0 +1,186 @@
+package lorawan
+
+import (
+	"bytes"
+	"crypto/aes"
+	"encoding/hex"
+)
+
+// Otaa is used to store Over The Air Activation data of a LoRaWAN session
+type Otaa struct {
+	DevEUI   [8]uint8
+	AppEUI   [8]uint8
+	AppKey   [16]uint8
+	devNonce [2]uint8
+	appNonce [3]uint8
+	NetID    [3]uint8
+	buf      []uint8
+}
+
+// Initialize DevNonce
+func (o *Otaa) Init() {
+	o.buf = make([]uint8, 0)
+
+	o.generateDevNonce()
+}
+
+func (o *Otaa) generateDevNonce() {
+	// TODO: handle error
+	rnd, _ := GetRand16()
+	o.devNonce[0] = rnd[0]
+	o.devNonce[1] = rnd[1]
+}
+
+func (o *Otaa) incrementDevNonce() {
+	nonce := uint16(o.devNonce[1])<<8 | uint16(o.devNonce[0]) + 1
+	o.devNonce[0] = uint8(nonce)
+	o.devNonce[1] = uint8((nonce >> 8))
+}
+
+// Set configures the Otaa AppEUI, DevEUI, AppKey for the device
+func (o *Otaa) Set(appEUI []uint8, devEUI []uint8, appKey []uint8) {
+	o.SetAppEUI(appEUI)
+	o.SetDevEUI(devEUI)
+	o.SetAppKey(appKey)
+}
+
+// SetAppEUI configures the Otaa AppEUI
+func (o *Otaa) SetAppEUI(appEUI []uint8) error {
+	if len(appEUI) != 8 {
+		return ErrInvalidEuiLength
+	}
+
+	copy(o.AppEUI[:], appEUI)
+
+	return nil
+}
+
+func (o *Otaa) GetAppEUI() string {
+	return hex.EncodeToString(o.AppEUI[:])
+}
+
+// SetDevEUI configures the Otaa DevEUI
+func (o *Otaa) SetDevEUI(devEUI []uint8) error {
+	if len(devEUI) != 8 {
+		return ErrInvalidEuiLength
+	}
+
+	copy(o.DevEUI[:], devEUI)
+
+	return nil
+}
+
+func (o *Otaa) GetDevEUI() string {
+	return hex.EncodeToString(o.DevEUI[:])
+}
+
+// SetAppKey configures the Otaa AppKey
+func (o *Otaa) SetAppKey(appKey []uint8) error {
+	if len(appKey) != 16 {
+		return ErrInvalidAppKeyLength
+	}
+
+	copy(o.AppKey[:], appKey)
+
+	return nil
+}
+
+func (o *Otaa) GetAppKey() string {
+	return hex.EncodeToString(o.AppKey[:])
+}
+
+func (o *Otaa) GetNetID() string {
+	return hex.EncodeToString(o.NetID[:])
+}
+
+func (o *Otaa) SetNetID(netID []uint8) error {
+	if len(netID) != 3 {
+		return ErrInvalidNetIDLength
+	}
+
+	copy(o.NetID[:], netID)
+
+	return nil
+}
+
+// GenerateJoinRequest Generates a LoraWAN Join request
+func (o *Otaa) GenerateJoinRequest() ([]uint8, error) {
+	o.incrementDevNonce()
+
+	// TODO: Add checks
+	o.buf = o.buf[:0]
+	o.buf = append(o.buf, 0x00)
+	o.buf = append(o.buf, reverseBytes(o.AppEUI[:])...)
+	o.buf = append(o.buf, reverseBytes(o.DevEUI[:])...)
+	o.buf = append(o.buf, o.devNonce[:]...)
+	mic := genPayloadMIC(o.buf, o.AppKey)
+	o.buf = append(o.buf, mic[:]...)
+
+	return o.buf, nil
+}
+
+// DecodeJoinAccept Decodes a Lora Join Accept packet
+func (o *Otaa) DecodeJoinAccept(phyPload []uint8, s *Session) error {
+	if len(phyPload) < 12 {
+		return ErrInvalidPacketLength
+	}
+	data := phyPload[1:] // Remove trailing 0x20
+
+	// Prepare AES Cipher
+	block, err := aes.NewCipher(o.AppKey[:])
+	if err != nil {
+		return err
+	}
+	buf := make([]byte, len(data))
+	for k := 0; k < len(data)/aes.BlockSize; k++ {
+		block.Encrypt(buf[k*aes.BlockSize:], data[k*aes.BlockSize:])
+	}
+
+	copy(o.appNonce[:], buf[0:3])
+	copy(o.NetID[:], buf[3:6])
+	copy(s.DevAddr[:], buf[6:10])
+	s.DLSettings = buf[10]
+	s.RXDelay = buf[11]
+
+	if len(buf) > 16 {
+		copy(s.CFList[:], buf[12:28])
+	}
+	rxMic := buf[len(buf)-4:]
+
+	dataMic := []byte{}
+	dataMic = append(dataMic, phyPload[0])
+	dataMic = append(dataMic, o.appNonce[:]...)
+	dataMic = append(dataMic, o.NetID[:]...)
+	dataMic = append(dataMic, s.DevAddr[:]...)
+	dataMic = append(dataMic, s.DLSettings)
+	dataMic = append(dataMic, s.RXDelay)
+	dataMic = append(dataMic, s.CFList[:]...)
+	computedMic := genPayloadMIC(dataMic[:], o.AppKey)
+	if !bytes.Equal(computedMic[:], rxMic[:]) {
+		return ErrInvalidMic
+	}
+	// Generate NwkSKey
+	// NwkSKey = aes128_encrypt(AppKey, 0x01|AppNonce|NetID|DevNonce|pad16)
+	sKey := []byte{}
+	sKey = append(sKey, 0x01)
+	sKey = append(sKey, o.appNonce[:]...)
+	sKey = append(sKey, o.NetID[:]...)
+	sKey = append(sKey, o.devNonce[:]...)
+	for i := 0; i < 7; i++ {
+		sKey = append(sKey, 0x00) // PAD to 16
+	}
+	block.Encrypt(buf, sKey)
+	copy(s.NwkSKey[:], buf[0:16])
+
+	// Generate AppSKey
+	// AppSKey = aes128_encrypt(AppKey, 0x02|AppNonce|NetID|DevNonce|pad16)
+	sKey[0] = 0x02
+	block.Encrypt(buf, sKey)
+	copy(s.AppSKey[:], buf[0:16])
+
+	// Reset counters
+	s.FCntDown = 0
+	s.FCntUp = 0
+
+	return nil
+}

lora/lorawan/session.go

@@ -0,0 +1,137 @@
+package lorawan
+
+import (
+	"crypto/aes"
+	"encoding/binary"
+	"encoding/hex"
+	"math"
+)
+
+// Session is used to store session data of a LoRaWAN session
+type Session struct {
+	NwkSKey    [16]uint8
+	AppSKey    [16]uint8
+	DevAddr    [4]uint8
+	FCntDown   uint32
+	FCntUp     uint32
+	CFList     [16]uint8
+	RXDelay    uint8
+	DLSettings uint8
+}
+
+// SetDevAddr configures the Session DevAddr
+func (s *Session) SetDevAddr(devAddr []uint8) error {
+	if len(devAddr) != 4 {
+		return ErrInvalidDevAddrLength
+	}
+
+	copy(s.DevAddr[:], devAddr)
+
+	return nil
+}
+
+// GetDevAddr returns the Session DevAddr
+func (s *Session) GetDevAddr() string {
+	return hex.EncodeToString(s.DevAddr[:])
+}
+
+// SetNwkSKey configures the Session NwkSKey
+func (s *Session) SetNwkSKey(nwkSKey []uint8) error {
+	if len(nwkSKey) != 16 {
+		return ErrInvalidNwkSKeyLength
+	}
+
+	copy(s.NwkSKey[:], nwkSKey)
+
+	return nil
+}
+
+// GetNwkSKey returns the Session NwkSKey
+func (s *Session) GetNwkSKey() string {
+	return hex.EncodeToString(s.NwkSKey[:])
+}
+
+// SetAppSKey configures the Session AppSKey
+func (s *Session) SetAppSKey(appSKey []uint8) error {
+	if len(appSKey) != 16 {
+		return ErrInvalidAppSKeyLength
+	}
+
+	copy(s.AppSKey[:], appSKey)
+
+	return nil
+}
+
+// GetAppSKey returns the Session AppSKey
+func (s *Session) GetAppSKey() string {
+	return hex.EncodeToString(s.AppSKey[:])
+}
+
+// GenMessage generates an uplink message.
+func (s *Session) GenMessage(dir uint8, payload []uint8) ([]uint8, error) {
+	var buf []uint8
+	buf = append(buf, 0b01000000) // FHDR Unconfirmed up
+	buf = append(buf, s.DevAddr[:]...)
+
+	// FCtl : No ADR, No RFU, No ACK, No FPending, No FOpt
+	buf = append(buf, 0x00)
+
+	// FCnt Up
+	buf = append(buf, uint8(s.FCntUp&0xFF), uint8((s.FCntUp>>8)&0xFF))
+
+	// FPort=1
+	buf = append(buf, 0x01)
+
+	fCnt := uint32(0)
+	if dir == 0 {
+		fCnt = s.FCntUp
+		s.FCntUp++
+	} else {
+		fCnt = s.FCntDown
+	}
+	data, err := s.genFRMPayload(dir, fCnt, payload, false)
+	if err != nil {
+		return nil, err
+	}
+	buf = append(buf, data[:]...)
+
+	mic := calcMessageMIC(buf, s.NwkSKey, dir, s.DevAddr[:], fCnt, uint8(len(buf)))
+	buf = append(buf, mic[:]...)
+
+	return buf, nil
+}
+
+func (s *Session) genFRMPayload(dir uint8, fCnt uint32, payload []byte, isFOpts bool) ([]byte, error) {
+	k := len(payload) / aes.BlockSize
+	if len(payload)%aes.BlockSize != 0 {
+		k++
+	}
+	if k > math.MaxUint8 {
+		return nil, ErrFrmPayloadTooLarge
+	}
+	encrypted := make([]byte, 0, k*16)
+	cipher, err := aes.NewCipher(s.AppSKey[:])
+	if err != nil {
+		panic(err)
+	}
+
+	var a [aes.BlockSize]byte
+	a[0] = 0x01
+	a[5] = dir
+	copy(a[6:10], s.DevAddr[:])
+	binary.LittleEndian.PutUint32(a[10:14], fCnt)
+	var ss [aes.BlockSize]byte
+	var b [aes.BlockSize]byte
+	for i := uint8(0); i < uint8(k); i++ {
+		copy(b[:], payload[i*aes.BlockSize:])
+		if !isFOpts {
+			a[15] = i + 1
+		}
+		cipher.Encrypt(ss[:], a[:])
+		for j := 0; j < aes.BlockSize; j++ {
+			b[j] = b[j] ^ ss[j]
+		}
+		encrypted = append(encrypted, b[:]...)
+	}
+	return encrypted[:len(payload)], nil
+}

lora/radio.go

@@ -0,0 +1,14 @@
+package lora
+
+type Radio interface {
+	Reset()
+	Tx(pkt []uint8, timeoutMs uint32) error
+	Rx(timeoutMs uint32) ([]uint8, error)
+	SetFrequency(freq uint32)
+	SetIqMode(mode uint8)
+	SetCodingRate(cr uint8)
+	SetBandwidth(bw uint8)
+	SetCrc(enable bool)
+	SetSpreadingFactor(sf uint8)
+	LoraConfig(cnf Config)
+}

lora/radio_event.go

@@ -0,0 +1,23 @@
+package lora
+
+const (
+	RadioEventRxDone = iota
+	RadioEventTxDone
+	RadioEventTimeout
+	RadioEventWatchdog
+	RadioEventCrcError
+	RadioEventUnhandled
+)
+
+// RadioEvent are used for communicating in the radio Event Channel
+type RadioEvent struct {
+	EventType int
+	IRQStatus uint16
+	EventData []byte
+}
+
+// NewRadioEvent() returns a new RadioEvent that can be used in the RadioChannel
+func NewRadioEvent(eType int, irqStatus uint16, eData []byte) RadioEvent {
+	r := RadioEvent{EventType: eType, IRQStatus: irqStatus, EventData: eData}
+	return r
+}

net/http/client.go

@@ -2,6 +2,8 @@ package http
 
 import (
 	"io"
+	"net/url"
+	"strings"
 	"time"
 )
 
@@ -211,3 +213,41 @@ func (c *Client) Post(url, contentType string, body io.Reader) (resp *Response,
 	req.Header.Set("Content-Type", contentType)
 	return c.Do(req)
 }
+
+// PostForm issues a POST to the specified URL, with data's keys and
+// values URL-encoded as the request body.
+//
+// The Content-Type header is set to application/x-www-form-urlencoded.
+// To set other headers, use NewRequest and DefaultClient.Do.
+//
+// When err is nil, resp always contains a non-nil resp.Body.
+// Caller should close resp.Body when done reading from it.
+//
+// PostForm is a wrapper around DefaultClient.PostForm.
+//
+// See the Client.Do method documentation for details on how redirects
+// are handled.
+//
+// To make a request with a specified context.Context, use NewRequestWithContext
+// and DefaultClient.Do.
+func PostForm(url string, data url.Values) (resp *Response, err error) {
+	return DefaultClient.PostForm(url, data)
+}
+
+// PostForm issues a POST to the specified URL,
+// with data's keys and values URL-encoded as the request body.
+//
+// The Content-Type header is set to application/x-www-form-urlencoded.
+// To set other headers, use NewRequest and Client.Do.
+//
+// When err is nil, resp always contains a non-nil resp.Body.
+// Caller should close resp.Body when done reading from it.
+//
+// See the Client.Do method documentation for details on how redirects
+// are handled.
+//
+// To make a request with a specified context.Context, use NewRequestWithContext
+// and Client.Do.
+func (c *Client) PostForm(url string, data url.Values) (resp *Response, err error) {
+	return c.Post(url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
+}

net/net.go

@@ -357,7 +357,10 @@ func ParseIP(s string) IP {
 
 // String returns the string form of the IP address ip.
 func (ip IP) String() string {
-	return string(ip)
+	if len(ip) < 4 {
+		return ""
+	}
+	return strconv.Itoa(int(ip[0])) + "." + strconv.Itoa(int(ip[1])) + "." + strconv.Itoa(int(ip[2])) + "." + strconv.Itoa(int(ip[3]))
 }
 
 // Conn is a generic stream-oriented network connection.

net/net_test.go

@@ -0,0 +1,14 @@
+package net
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestIPAddressString(t *testing.T) {
+	c := qt.New(t)
+	ipaddr := ParseIP("127.0.0.1")
+
+	c.Assert(ipaddr.String(), qt.Equals, "127.0.0.1")
+}

sh1106/registers.go

@@ -0,0 +1,40 @@
+package sh1106
+
+// Registers
+const (
+	Address = 0x3C
+
+	SETCONTRAST                          = 0x81
+	DISPLAYALLON_RESUME                  = 0xA4
+	DISPLAYALLON                         = 0xA5
+	NORMALDISPLAY                        = 0xA6
+	INVERTDISPLAY                        = 0xA7
+	DISPLAYOFF                           = 0xAE
+	DISPLAYON                            = 0xAF
+	SETDISPLAYOFFSET                     = 0xD3
+	SETCOMPINS                           = 0xDA
+	SETVCOMDETECT                        = 0xDB
+	SETDISPLAYCLOCKDIV                   = 0xD5
+	SETPRECHARGE                         = 0xD9
+	SETMULTIPLEX                         = 0xA8
+	SETLOWCOLUMN                         = 0x00
+	SETHIGHCOLUMN                        = 0x10
+	SETSTARTLINE                         = 0x40
+	MEMORYMODE                           = 0x20
+	COLUMNADDR                           = 0x21
+	PAGEADDR                             = 0x22
+	COMSCANINC                           = 0xC0
+	COMSCANDEC                           = 0xC8
+	SEGREMAP                             = 0xA0
+	CHARGEPUMP                           = 0x8D
+	ACTIVATE_SCROLL                      = 0x2F
+	DEACTIVATE_SCROLL                    = 0x2E
+	SET_VERTICAL_SCROLL_AREA             = 0xA3
+	RIGHT_HORIZONTAL_SCROLL              = 0x26
+	LEFT_HORIZONTAL_SCROLL               = 0x27
+	VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL = 0x29
+	VERTICAL_AND_LEFT_HORIZONTAL_SCROLL  = 0x2A
+
+	EXTERNALVCC  VccMode = 0x1
+	SWITCHCAPVCC VccMode = 0x2
+)

sh1106/sh1106.go

@@ -0,0 +1,326 @@
+// Package sh1106 implements a driver for the SH1106 display controller
+//
+// Copied from https://github.com/toyo/tinygo-sh1106 (under BSD 3-clause license)
+package sh1106 // import "tinygo.org/x/drivers/sh1106"
+
+import (
+	"errors"
+	"image/color"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+// Device wraps an SPI connection.
+type Device struct {
+	bus        Buser
+	buffer     []byte
+	cmdbuf     [1]byte
+	width      int16
+	height     int16
+	bufferSize int16
+	vccState   VccMode
+}
+
+// Config is the configuration for the display
+type Config struct {
+	Width    int16
+	Height   int16
+	VccState VccMode
+	Address  uint16
+}
+
+type I2CBus struct {
+	wire    drivers.I2C
+	Address uint16
+}
+
+type SPIBus struct {
+	wire     drivers.SPI
+	dcPin    machine.Pin
+	resetPin machine.Pin
+	csPin    machine.Pin
+}
+
+type Buser interface {
+	configure()
+	tx(data []byte, isCommand bool)
+	setAddress(address uint16)
+}
+
+type VccMode uint8
+
+// NewI2C creates a new SSD1306 connection. The I2C wire must already be configured.
+func NewI2C(bus drivers.I2C) Device {
+	return Device{
+		bus: &I2CBus{
+			wire:    bus,
+			Address: Address,
+		},
+	}
+}
+
+// NewSPI creates a new SSD1306 connection. The SPI wire must already be configured.
+func NewSPI(bus drivers.SPI, dcPin, resetPin, csPin machine.Pin) Device {
+	dcPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	return Device{
+		bus: &SPIBus{
+			wire:     bus,
+			dcPin:    dcPin,
+			resetPin: resetPin,
+			csPin:    csPin,
+		},
+	}
+}
+
+// Configure initializes the display with default configuration
+func (d *Device) Configure(cfg Config) {
+	if cfg.Width != 0 {
+		d.width = cfg.Width
+	} else {
+		d.width = 128
+	}
+	if cfg.Height != 0 {
+		d.height = cfg.Height
+	} else {
+		d.height = 64
+	}
+	if cfg.Address != 0 {
+		d.bus.setAddress(cfg.Address)
+	}
+	if cfg.VccState != 0 {
+		d.vccState = cfg.VccState
+	} else {
+		d.vccState = SWITCHCAPVCC
+	}
+	d.bufferSize = d.width * d.height / 8
+	d.buffer = make([]byte, d.bufferSize)
+
+	d.bus.configure()
+
+	// busyWaitDelay(100 * time.Nanosecond)
+	time.Sleep(100 * time.Nanosecond)
+	d.Command(DISPLAYOFF)
+	d.Command(SETDISPLAYCLOCKDIV)
+	d.Command(0x80)
+	d.Command(SETMULTIPLEX)
+	d.Command(uint8(d.height - 1))
+	d.Command(SETDISPLAYOFFSET)
+	d.Command(0x0)
+	d.Command(SETSTARTLINE | 0x0)
+	d.Command(CHARGEPUMP)
+	if d.vccState == EXTERNALVCC {
+		d.Command(0x10)
+	} else {
+		d.Command(0x14)
+	}
+	d.Command(MEMORYMODE)
+	d.Command(0x00)
+	d.Command(SEGREMAP | 0x1)
+	d.Command(COMSCANDEC)
+
+	if (d.width == 128 && d.height == 64) || (d.width == 64 && d.height == 48) { // 128x64 or 64x48
+		d.Command(SETCOMPINS)
+		d.Command(0x12)
+		d.Command(SETCONTRAST)
+		if d.vccState == EXTERNALVCC {
+			d.Command(0x9F)
+		} else {
+			d.Command(0xCF)
+		}
+	} else if d.width == 128 && d.height == 32 { // 128x32
+		d.Command(SETCOMPINS)
+		d.Command(0x02)
+		d.Command(SETCONTRAST)
+		d.Command(0x8F)
+	} else if d.width == 96 && d.height == 16 { // 96x16
+		d.Command(SETCOMPINS)
+		d.Command(0x2)
+		d.Command(SETCONTRAST)
+		if d.vccState == EXTERNALVCC {
+			d.Command(0x10)
+		} else {
+			d.Command(0xAF)
+		}
+	} else {
+		// fail silently, it might work
+		println("there's no configuration for this display's size")
+	}
+
+	d.Command(SETPRECHARGE)
+	if d.vccState == EXTERNALVCC {
+		d.Command(0x22)
+	} else {
+		d.Command(0xF1)
+	}
+	d.Command(SETVCOMDETECT)
+	d.Command(0x40)
+	d.Command(DISPLAYALLON_RESUME)
+	d.Command(NORMALDISPLAY)
+	d.Command(DEACTIVATE_SCROLL)
+	d.Command(DISPLAYON)
+}
+
+// ClearBuffer clears the image buffer
+func (d *Device) ClearBuffer() {
+	for i := int16(0); i < d.bufferSize; i++ {
+		d.buffer[i] = 0
+	}
+}
+
+// ClearDisplay clears the image buffer and clear the display
+func (d *Device) ClearDisplay() {
+	d.ClearBuffer()
+	d.Display()
+}
+
+// Display sends the whole buffer to the screen
+func (d *Device) Display() error {
+	// In the 128x64 (SPI) screen resetting to 0x0 after 128 times corrupt the buffer
+	// Since we're printing the whole buffer, avoid resetting it
+	if d.width != 128 || d.height != 64 {
+		d.Command(COLUMNADDR)
+		d.Command(0)
+		d.Command(uint8(d.width - 1))
+		d.Command(PAGEADDR)
+		d.Command(0)
+		d.Command(uint8(d.height/8) - 1)
+	}
+
+	for pg := uint8(0); pg < uint8(d.height/8); pg++ {
+		d.Command(0xB0 | (pg & 0x07)) // SET_PAGE_ADDR
+		d.Command(SETLOWCOLUMN | 2)
+		d.Command(SETHIGHCOLUMN | 0)
+		d.Tx(d.buffer[uint16(pg)*0x80:uint16(pg+1)*0x80], false)
+	}
+
+	return nil
+}
+
+// SetPixel enables or disables a pixel in the buffer
+// color.RGBA{0, 0, 0, 255} is consider transparent, anything else
+// with enable a pixel on the screen
+func (d *Device) SetPixel(x int16, y int16, c color.RGBA) {
+	if x < 0 || x >= d.width || y < 0 || y >= d.height {
+		return
+	}
+	byteIndex := x + (y/8)*d.width
+	if c.R != 0 || c.G != 0 || c.B != 0 {
+		d.buffer[byteIndex] |= 1 << uint8(y%8)
+	} else {
+		d.buffer[byteIndex] &^= 1 << uint8(y%8)
+	}
+}
+
+// GetPixel returns if the specified pixel is on (true) or off (false)
+func (d *Device) GetPixel(x int16, y int16) bool {
+	if x < 0 || x >= d.width || y < 0 || y >= d.height {
+		return false
+	}
+	byteIndex := x + (y/8)*d.width
+	return (d.buffer[byteIndex] >> uint8(y%8) & 0x1) == 1
+}
+
+// SetBuffer changes the whole buffer at once
+func (d *Device) SetBuffer(buffer []byte) error {
+	if int16(len(buffer)) != d.bufferSize {
+		//return ErrBuffer
+		return errors.New("wrong size buffer")
+	}
+	for i := int16(0); i < d.bufferSize; i++ {
+		d.buffer[i] = buffer[i]
+	}
+	return nil
+}
+
+func (d *Device) SetScroll(line int16) {
+	d.Command(SETSTARTLINE + uint8(line&0b111111))
+}
+
+// Command sends a command to the display
+func (d *Device) Command(command uint8) {
+	d.cmdbuf[0] = command
+	d.bus.tx(d.cmdbuf[:], true)
+}
+
+// setAddress sets the address to the I2C bus
+func (b *I2CBus) setAddress(address uint16) {
+	b.Address = address
+}
+
+// setAddress does nothing, but it's required to avoid reflection
+func (b *SPIBus) setAddress(address uint16) {
+	// do nothing
+	println("trying to Configure an address on a SPI device")
+}
+
+// configure does nothing, but it's required to avoid reflection
+func (b *I2CBus) configure() {}
+
+// configure configures some pins with the SPI bus
+func (b *SPIBus) configure() {
+	b.csPin.Low()
+	b.dcPin.Low()
+	b.resetPin.Low()
+
+	b.resetPin.High()
+	// busyWaitDelay(time.Millisecond)
+	time.Sleep(1 * time.Millisecond)
+	b.resetPin.Low()
+	// busyWaitDelay(10 * time.Millisecond)
+	time.Sleep(10 * time.Millisecond)
+	b.resetPin.High()
+}
+
+// Tx sends data to the display
+func (d *Device) Tx(data []byte, isCommand bool) {
+	d.bus.tx(data, isCommand)
+}
+
+// tx sends data to the display (I2CBus implementation)
+func (b *I2CBus) tx(data []byte, isCommand bool) {
+	if isCommand {
+		b.wire.WriteRegister(uint8(b.Address), 0x00, data)
+	} else {
+		b.wire.WriteRegister(uint8(b.Address), 0x40, data)
+	}
+}
+
+// tx sends data to the display (SPIBus implementation)
+func (b *SPIBus) tx(data []byte, isCommand bool) {
+	if isCommand {
+		b.csPin.High()
+		riseTimeDelay()
+		b.dcPin.Low()
+		b.csPin.Low()
+
+		b.wire.Tx(data, nil)
+		b.csPin.High()
+	} else {
+		b.csPin.High()
+		riseTimeDelay()
+		b.dcPin.High()
+		b.csPin.Low()
+
+		b.wire.Tx(data, nil)
+		b.csPin.High()
+	}
+}
+
+// Size returns the current size of the display.
+func (d *Device) Size() (w, h int16) {
+	return d.width, d.height
+}
+
+// TODO: is this really necessary? seems to work fine without this on macropad-rp2040 at least
+func riseTimeDelay() {
+	busyWaitDelay(1 * time.Microsecond)
+}
+
+func busyWaitDelay(duration time.Duration) {
+	for start := time.Now(); time.Since(start) < duration; {
+	}
+}

sx126x/radiocontrol.go

@@ -0,0 +1,13 @@
+package sx126x
+
+// SX126X radio transceiver has several pins that control
+// RF_IN, RF_OUT, NSS, and BUSY.
+// This interface allows the creation of struct
+// that can drive the RF Switch (Used in Lora RX and Lora Tx)
+type RadioController interface {
+	Init() error
+	SetRfSwitchMode(mode int) error
+	SetNss(state bool) error
+	WaitWhileBusy() error
+	SetupInterrupts(handler func()) error
+}

sx126x/radiocontrol_gnse.go

@@ -0,0 +1,56 @@
+//go:build gnse
+
+/*
+Generic Node Sensor Edition
+RFSwitch
+
+Disable Switch   :  PB8=OFF PA0=OFF  PA1=OFF
+Enable RX        :  PB8=ON  PA0=ON   PA1=OFF
+Enable TX RFO LP :  PB8=ON  PA0=ON   PA1=ON
+Enable TX RFO HP :  PB8=ON  PA0=OFF  PA1=ON
+*/
+package sx126x
+
+import (
+	"machine"
+)
+
+// RadioControl for GNSE board.
+type RadioControl struct {
+	STM32RadioControl
+}
+
+func NewRadioControl() *RadioControl {
+	return &RadioControl{STM32RadioControl{}}
+}
+
+// Init pins needed for controlling rx/tx
+func (rc *RadioControl) Init() error {
+	machine.PA0.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.PA1.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.PB8.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	return nil
+}
+
+func (rc *RadioControl) SetRfSwitchMode(mode int) error {
+	switch mode {
+
+	case RFSWITCH_TX_HP:
+		machine.PA0.Set(false)
+		machine.PA1.Set(true)
+		machine.PB8.Set(true)
+
+	case RFSWITCH_TX_LP:
+		machine.PA0.Set(true)
+		machine.PA1.Set(true)
+		machine.PB8.Set(true)
+
+	case RFSWITCH_RX:
+		machine.PA0.Set(true)
+		machine.PA1.Set(false)
+		machine.PB8.Set(true)
+	}
+
+	return nil
+}

sx126x/radiocontrol_lorae5.go

@@ -0,0 +1,47 @@
+//go:build lorae5
+
+/*
+LoRa-E5 module ONLY transmits through RFO_HP:
+
+Receive: PA4=1, PA5=0
+Transmit(high output power, SMPS mode): PA4=0, PA5=1
+*/
+
+package sx126x
+
+import (
+	"machine"
+)
+
+// RadioControl for LoRa-E5 board.
+type RadioControl struct {
+	STM32RadioControl
+}
+
+func NewRadioControl() *RadioControl {
+	return &RadioControl{STM32RadioControl: STM32RadioControl{}}
+}
+
+// Init pins needed for controlling rx/tx
+func (rc *RadioControl) Init() error {
+	machine.PA4.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.PB5.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	return nil
+}
+
+func (rc *RadioControl) SetRfSwitchMode(mode int) error {
+	switch mode {
+
+	case RFSWITCH_RX:
+		machine.PA4.Set(true)
+		machine.PB5.Set(false)
+	case RFSWITCH_TX_LP:
+		return errLowPowerTxNotSupported
+	case RFSWITCH_TX_HP:
+		machine.PA4.Set(false)
+		machine.PB5.Set(true)
+
+	}
+	return nil
+}

sx126x/radiocontrol_pins.go

@@ -0,0 +1,91 @@
+//go:build !stm32wlx
+
+package sx126x
+
+import (
+	"machine"
+
+	"time"
+)
+
+// RadioControl for boards that are connected using normal pins.
+type RadioControl struct {
+	nssPin, busyPin, dio1Pin   machine.Pin
+	rxPin, txLowPin, txHighPin machine.Pin
+}
+
+func NewRadioControl(nssPin, busyPin, dio1Pin,
+	rxPin, txLowPin, txHighPin machine.Pin) *RadioControl {
+	return &RadioControl{
+		nssPin:    nssPin,
+		busyPin:   busyPin,
+		dio1Pin:   dio1Pin,
+		rxPin:     rxPin,
+		txLowPin:  txLowPin,
+		txHighPin: txHighPin,
+	}
+}
+
+// SetNss sets the NSS line aka chip select for SPI.
+func (rc *RadioControl) SetNss(state bool) error {
+	rc.nssPin.Set(state)
+	return nil
+}
+
+// WaitWhileBusy wait until the radio is no longer busy
+func (rc *RadioControl) WaitWhileBusy() error {
+	count := 100
+	for count > 0 {
+		if !rc.busyPin.Get() {
+			return nil
+		}
+		count--
+		time.Sleep(time.Millisecond)
+	}
+	return errWaitWhileBusyTimeout
+}
+
+// Init() configures whatever needed for sx126x radio control
+func (rc *RadioControl) Init() error {
+	rc.nssPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	rc.busyPin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	return nil
+}
+
+// add interrupt handler for Radio IRQs for pins
+func (rc *RadioControl) SetupInterrupts(handler func()) error {
+	irqHandler = handler
+
+	rc.dio1Pin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	if err := rc.dio1Pin.SetInterrupt(machine.PinRising, handleInterrupt); err != nil {
+		return errRadioNotFound
+	}
+
+	return nil
+}
+
+var irqHandler func()
+
+func handleInterrupt(machine.Pin) {
+	irqHandler()
+}
+
+func (rc *RadioControl) SetRfSwitchMode(mode int) error {
+	switch mode {
+
+	case RFSWITCH_RX:
+		rc.rxPin.Set(true)
+		rc.txLowPin.Set(false)
+		rc.txHighPin.Set(false)
+	case RFSWITCH_TX_LP:
+		rc.rxPin.Set(false)
+		rc.txLowPin.Set(true)
+		rc.txHighPin.Set(false)
+	case RFSWITCH_TX_HP:
+		rc.rxPin.Set(false)
+		rc.txLowPin.Set(false)
+		rc.txHighPin.Set(true)
+	}
+
+	return nil
+}

sx126x/radiocontrol_stm32wl.go

@@ -4,39 +4,28 @@ package sx126x
 
 import (
 	"device/stm32"
-	"errors"
+
-	"machine"
+	"runtime/interrupt"
-	"tinygo.org/x/drivers"
 )
 
-// New creates a new SX126x connection.
+// STM32RadioControl helps implement the RadioController interface
-func New(spi drivers.SPI) *Device {
+type STM32RadioControl struct {
-	c := make(chan RadioEvent, 10)
+	irqHandler func()
-	d := Device{
-		spi:            spi,
-		radioEventChan: c,
-	}
-	if d.spi == machine.SPI3 {
-		d.SubGhzInit()
-		d.SetDeviceType(DEVICE_TYPE_SX1262)
-	} else {
-		panic("Driver only support SUBGHZSPI (SPI3) on stm32wlx targets")
-	}
-	return &d
 }
 
-// SpiSetNss Sets the NSS line
+// SetNss sets the NSS line aka chip select for SPI.
-func (d *Device) SpiSetNss(state bool) {
+func (rc *STM32RadioControl) SetNss(state bool) error {
 	if state {
 		stm32.PWR.SUBGHZSPICR.SetBits(stm32.PWR_SUBGHZSPICR_NSS)
 	} else {
 		stm32.PWR.SUBGHZSPICR.ClearBits(stm32.PWR_SUBGHZSPICR_NSS)
-
 	}
+
+	return nil
 }
 
-// WaitBusy sleep until all busy flags clears
+// WaitWhileBusy wait until the radio is no longer busy
-func (d *Device) WaitBusy() error {
+func (rc *STM32RadioControl) WaitWhileBusy() error {
 	count := 100
 	var rfbusyms, rfbusys bool
 	for count > 0 {
@@ -48,12 +37,11 @@ func (d *Device) WaitBusy() error {
 		}
 		count--
 	}
-	return errors.New("WaitBusy Timeout")
+	return errWaitWhileBusyTimeout
 }
 
-// SubGhzInit() configures internal SX1262's SPI bus.
+// init() configures whatever needed for sx126x radio control
-func (d *Device) SubGhzInit() {
+func init() {
-
 	// Enable APB3 Periph clock and delay
 	stm32.RCC.APB3ENR.SetBits(stm32.RCC_APB3ENR_SUBGHZSPIEN)
 	_ = stm32.RCC.APB3ENR.Get()
@@ -80,5 +68,18 @@ func (d *Device) SubGhzInit() {
 	stm32.SPI3.CR1.Set(stm32.SPI_CR1_MSTR | stm32.SPI_CR1_SSI | (0b010 << 3) | stm32.SPI_CR1_SSM)
 	stm32.SPI3.CR2.Set(stm32.SPI_CR2_FRXTH | (0b111 << 8))
 	stm32.SPI3.CR1.SetBits(stm32.SPI_CR1_SPE)
-
+}
+
+func (rc *STM32RadioControl) SetupInterrupts(handler func()) error {
+	irqHandler = handler
+	intr := interrupt.New(stm32.IRQ_Radio_IRQ_Busy, handleInterrupt)
+	intr.Enable()
+
+	return nil
+}
+
+var irqHandler func()
+
+func handleInterrupt(interrupt.Interrupt) {
+	irqHandler()
 }

sx126x/radiocontrol_wl55jc.go

@@ -1,8 +1,8 @@
 //go:build nucleowl55jc
 
 /*
-	Nucleo WL55JC1
+Nucleo WL55JC1
-	RFSwitch
+RFSwitch
 
 +-----------+---------+------------+------------+
 |           | FE_CTRL1 |  FE_CTRL2 |   FE_CTRL3 |
@@ -13,42 +13,48 @@
 |  RX       |   HIGH   |   LOW     |    HIGH    |
 +-----------+----------+-----------+------------+
 */
-package rfswitch
+package sx126x
 
 import (
 	"machine"
-
-	"tinygo.org/x/drivers/sx126x"
 )
 
-type CustomSwitch struct {
+// RadioControl for Nucleo WL55JC1 board.
+type RadioControl struct {
+	STM32RadioControl
 }
 
-func (s CustomSwitch) InitRFSwitch() {
+func NewRadioControl() *RadioControl {
+	return &RadioControl{STM32RadioControl{}}
+}
+
+// Init pins needed for controlling rx/tx
+func (rc *RadioControl) Init() error {
 	machine.PC4.Configure(machine.PinConfig{Mode: machine.PinOutput})
 	machine.PC5.Configure(machine.PinConfig{Mode: machine.PinOutput})
 	machine.PC3.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	return nil
 }
 
-func (s CustomSwitch) SetRfSwitchMode(mode int) error {
+func (rc *RadioControl) SetRfSwitchMode(mode int) error {
 	switch mode {
 
-	case sx126x.RFSWITCH_TX_HP:
+	case RFSWITCH_TX_HP:
 		machine.PC4.Set(false)
 		machine.PC5.Set(true)
 		machine.PC3.Set(true)
 
-	case sx126x.RFSWITCH_TX_LP:
+	case RFSWITCH_TX_LP:
 		machine.PC4.Set(true)
 		machine.PC5.Set(true)
 		machine.PC3.Set(true)
 
-	case sx126x.RFSWITCH_RX:
+	case RFSWITCH_RX:
 		machine.PC4.Set(true)
 		machine.PC5.Set(false)
 		machine.PC3.Set(true)
-
 	}
-	return nil
 
+	return nil
 }

sx126x/registers.go

@@ -206,48 +206,42 @@ const (
 	SX126X_PA_RAMP_3400U = 0x07 //  7     0                3400 us
 
 	//SX126X_CMD_SET_MODULATION_PARAMS
-	SX126X_GFSK_FILTER_NONE                = 0x00 //  7     0     GFSK filter: none
+	SX126X_GFSK_FILTER_NONE      = 0x00 //  7     0     GFSK filter: none
-	SX126X_GFSK_FILTER_GAUSS_0_3           = 0x08 //  7     0                  Gaussian, BT = 0.3
+	SX126X_GFSK_FILTER_GAUSS_0_3 = 0x08 //  7     0                  Gaussian, BT = 0.3
-	SX126X_GFSK_FILTER_GAUSS_0_5           = 0x09 //  7     0                  Gaussian, BT = 0.5
+	SX126X_GFSK_FILTER_GAUSS_0_5 = 0x09 //  7     0                  Gaussian, BT = 0.5
-	SX126X_GFSK_FILTER_GAUSS_0_7           = 0x0A //  7     0                  Gaussian, BT = 0.7
+	SX126X_GFSK_FILTER_GAUSS_0_7 = 0x0A //  7     0                  Gaussian, BT = 0.7
-	SX126X_GFSK_FILTER_GAUSS_1             = 0x0B //  7     0                  Gaussian, BT = 1
+	SX126X_GFSK_FILTER_GAUSS_1   = 0x0B //  7     0                  Gaussian, BT = 1
-	SX126X_GFSK_RX_BW_4_8                  = 0x1F //  7     0     GFSK Rx bandwidth: 4.8 kHz
+	SX126X_GFSK_RX_BW_4_8        = 0x1F //  7     0     GFSK Rx bandwidth: 4.8 kHz
-	SX126X_GFSK_RX_BW_5_8                  = 0x17 //  7     0                        5.8 kHz
+	SX126X_GFSK_RX_BW_5_8        = 0x17 //  7     0                        5.8 kHz
-	SX126X_GFSK_RX_BW_7_3                  = 0x0F //  7     0                        7.3 kHz
+	SX126X_GFSK_RX_BW_7_3        = 0x0F //  7     0                        7.3 kHz
-	SX126X_GFSK_RX_BW_9_7                  = 0x1E //  7     0                        9.7 kHz
+	SX126X_GFSK_RX_BW_9_7        = 0x1E //  7     0                        9.7 kHz
-	SX126X_GFSK_RX_BW_11_7                 = 0x16 //  7     0                        11.7 kHz
+	SX126X_GFSK_RX_BW_11_7       = 0x16 //  7     0                        11.7 kHz
-	SX126X_GFSK_RX_BW_14_6                 = 0x0E //  7     0                        14.6 kHz
+	SX126X_GFSK_RX_BW_14_6       = 0x0E //  7     0                        14.6 kHz
-	SX126X_GFSK_RX_BW_19_5                 = 0x1D //  7     0                        19.5 kHz
+	SX126X_GFSK_RX_BW_19_5       = 0x1D //  7     0                        19.5 kHz
-	SX126X_GFSK_RX_BW_23_4                 = 0x15 //  7     0                        23.4 kHz
+	SX126X_GFSK_RX_BW_23_4       = 0x15 //  7     0                        23.4 kHz
-	SX126X_GFSK_RX_BW_29_3                 = 0x0D //  7     0                        29.3 kHz
+	SX126X_GFSK_RX_BW_29_3       = 0x0D //  7     0                        29.3 kHz
-	SX126X_GFSK_RX_BW_39_0                 = 0x1C //  7     0                        39.0 kHz
+	SX126X_GFSK_RX_BW_39_0       = 0x1C //  7     0                        39.0 kHz
-	SX126X_GFSK_RX_BW_46_9                 = 0x14 //  7     0                        46.9 kHz
+	SX126X_GFSK_RX_BW_46_9       = 0x14 //  7     0                        46.9 kHz
-	SX126X_GFSK_RX_BW_58_6                 = 0x0C //  7     0                        58.6 kHz
+	SX126X_GFSK_RX_BW_58_6       = 0x0C //  7     0                        58.6 kHz
-	SX126X_GFSK_RX_BW_78_2                 = 0x1B //  7     0                        78.2 kHz
+	SX126X_GFSK_RX_BW_78_2       = 0x1B //  7     0                        78.2 kHz
-	SX126X_GFSK_RX_BW_93_8                 = 0x13 //  7     0                        93.8 kHz
+	SX126X_GFSK_RX_BW_93_8       = 0x13 //  7     0                        93.8 kHz
-	SX126X_GFSK_RX_BW_117_3                = 0x0B //  7     0                        117.3 kHz
+	SX126X_GFSK_RX_BW_117_3      = 0x0B //  7     0                        117.3 kHz
-	SX126X_GFSK_RX_BW_156_2                = 0x1A //  7     0                        156.2 kHz
+	SX126X_GFSK_RX_BW_156_2      = 0x1A //  7     0                        156.2 kHz
-	SX126X_GFSK_RX_BW_187_2                = 0x12 //  7     0                        187.2 kHz
+	SX126X_GFSK_RX_BW_187_2      = 0x12 //  7     0                        187.2 kHz
-	SX126X_GFSK_RX_BW_234_3                = 0x0A //  7     0                        234.3 kHz
+	SX126X_GFSK_RX_BW_234_3      = 0x0A //  7     0                        234.3 kHz
-	SX126X_GFSK_RX_BW_312_0                = 0x19 //  7     0                        312.0 kHz
+	SX126X_GFSK_RX_BW_312_0      = 0x19 //  7     0                        312.0 kHz
-	SX126X_GFSK_RX_BW_373_6                = 0x11 //  7     0                        373.6 kHz
+	SX126X_GFSK_RX_BW_373_6      = 0x11 //  7     0                        373.6 kHz
-	SX126X_GFSK_RX_BW_467_0                = 0x09 //  7     0                        467.0 kHz
+	SX126X_GFSK_RX_BW_467_0      = 0x09 //  7     0                        467.0 kHz
-	SX126X_LORA_BW_7_8                     = 0x00 //  7     0     LoRa bandwidth: 7.8 kHz
+	SX126X_LORA_BW_7_8           = 0x00 //  7     0     LoRa bandwidth: 7.8 kHz
-	SX126X_LORA_BW_10_4                    = 0x08 //  7     0                     10.4 kHz
+	SX126X_LORA_BW_10_4          = 0x08 //  7     0                     10.4 kHz
-	SX126X_LORA_BW_15_6                    = 0x01 //  7     0                     15.6 kHz
+	SX126X_LORA_BW_15_6          = 0x01 //  7     0                     15.6 kHz
-	SX126X_LORA_BW_20_8                    = 0x09 //  7     0                     20.8 kHz
+	SX126X_LORA_BW_20_8          = 0x09 //  7     0                     20.8 kHz
-	SX126X_LORA_BW_31_25                   = 0x02 //  7     0                     31.25 kHz
+	SX126X_LORA_BW_31_25         = 0x02 //  7     0                     31.25 kHz
-	SX126X_LORA_BW_41_7                    = 0x0A //  7     0                     41.7 kHz
+	SX126X_LORA_BW_41_7          = 0x0A //  7     0                     41.7 kHz
-	SX126X_LORA_BW_62_5                    = 0x03 //  7     0                     62.5 kHz
+	SX126X_LORA_BW_62_5          = 0x03 //  7     0                     62.5 kHz
-	SX126X_LORA_BW_125_0                   = 0x04 //  7     0                     125.0 kHz
+	SX126X_LORA_BW_125_0         = 0x04 //  7     0                     125.0 kHz
-	SX126X_LORA_BW_250_0                   = 0x05 //  7     0                     250.0 kHz
+	SX126X_LORA_BW_250_0         = 0x05 //  7     0                     250.0 kHz
-	SX126X_LORA_BW_500_0                   = 0x06 //  7     0                     500.0 kHz
+	SX126X_LORA_BW_500_0         = 0x06 //  7     0                     500.0 kHz
-	SX126X_LORA_CR_4_5                     = 0x01 //  7     0     LoRa coding rate: 4/5
-	SX126X_LORA_CR_4_6                     = 0x02 //  7     0                       4/6
-	SX126X_LORA_CR_4_7                     = 0x03 //  7     0                       4/7
-	SX126X_LORA_CR_4_8                     = 0x04 //  7     0                       4/8
-	SX126X_LORA_LOW_DATA_RATE_OPTIMIZE_OFF = 0x00 //  7     0     LoRa low data rate optimization: disabled
-	SX126X_LORA_LOW_DATA_RATE_OPTIMIZE_ON  = 0x01 //  7     0                                      enabled
 
 	//SX126X_CMD_SET_PACKET_PARAMS
 	SX126X_GFSK_PREAMBLE_DETECT_OFF         = 0x00 //  7     0     GFSK minimum preamble length before reception starts: detector disabled
@@ -267,12 +261,6 @@ const (
 	SX126X_GFSK_CRC_2_BYTE_INV              = 0x06 //  7     0                      2 byte, inverted
 	SX126X_GFSK_WHITENING_OFF               = 0x00 //  7     0     GFSK data whitening: disabled
 	SX126X_GFSK_WHITENING_ON                = 0x01 //  7     0                          enabled
-	SX126X_LORA_HEADER_EXPLICIT             = 0x00 //  7     0     LoRa header mode: explicit
-	SX126X_LORA_HEADER_IMPLICIT             = 0x01 //  7     0                       implicit
-	SX126X_LORA_CRC_OFF                     = 0x00 //  7     0     LoRa CRC mode: disabled
-	SX126X_LORA_CRC_ON                      = 0x01 //  7     0                    enabled
-	SX126X_LORA_IQ_STANDARD                 = 0x00 //  7     0     LoRa IQ setup: standard
-	SX126X_LORA_IQ_INVERTED                 = 0x01 //  7     0                    inverted
 
 	//SX126X_CMD_SET_CAD_PARAMS
 	SX126X_CAD_ON_1_SYMB  = 0x00 //  7     0     number of symbols used for CAD: 1
@@ -323,13 +311,4 @@ const (
 
 	SX126X_LORA_MAC_PUBLIC_SYNCWORD  = 0x3444
 	SX126X_LORA_MAC_PRIVATE_SYNCWORD = 0x1424
-
-	SX126X_LORA_SF5  = 0x05
-	SX126X_LORA_SF6  = 0x06
-	SX126X_LORA_SF7  = 0x07
-	SX126X_LORA_SF8  = 0x08
-	SX126X_LORA_SF9  = 0x09
-	SX126X_LORA_SF10 = 0x0A
-	SX126X_LORA_SF11 = 0x0B
-	SX126X_LORA_SF12 = 0x0C
 )

sx126x/sx126x.go

@@ -7,16 +7,19 @@ import (
 	"errors"
 	"time"
 
+	"machine"
+
 	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/lora"
 )
 
-// SX126X radio transceiver RF_IN and RF_OUT may be connected
+var (
-// to RF Switch. This interface allows the creation of struct
+	errWaitWhileBusyTimeout   = errors.New("WaitWhileBusy Timeout")
-// that can drive the RF Switch (Used in Lora RX and Lora Tx)
+	errLowPowerTxNotSupported = errors.New("RFSWITCH_TX_LP not supported")
-type RFSwitch interface {
+	errRadioNotFound          = errors.New("LoRa radio not found")
-	InitRFSwitch()
+	errUnexpectedRxRadioEvent = errors.New("Unexpected Radio Event during RX")
-	SetRfSwitchMode(mode int) error
+	errUnexpectedTxRadioEvent = errors.New("Unexpected Radio Event during TX")
-}
+)
 
 const (
 	DEVICE_TYPE_SX1261 = iota
@@ -30,61 +33,35 @@ const (
 	RFSWITCH_TX_HP = iota
 )
 
-const (
-	RadioEventRxDone    = iota
-	RadioEventTxDone    = iota
-	RadioEventTimeout   = iota
-	RadioEventWatchdog  = iota
-	RadioEventCrcError  = iota
-	RadioEventUnhandled = iota
-)
-
-// RadioEvent are used for communicating in the radio Event Channel
-type RadioEvent struct {
-	EventType int
-	IRQStatus uint16
-	EventData []byte
-}
-
 const (
 	PERIOD_PER_SEC  = (uint32)(1000000 / 15.625) // SX1261 DS 13.1.4
 	SPI_BUFFER_SIZE = 256
 )
 
-// Device wraps an SPI connection to a SX127x device.
+// Device wraps an SPI connection to a SX126x device.
 type Device struct {
-	spi            drivers.SPI     // SPI bus for module communication
+	spi            drivers.SPI          // SPI bus for module communication
-	radioEventChan chan RadioEvent // Channel for Receiving events
+	rstPin         machine.Pin          // GPIO for reset pin
-	loraConf       LoraConfig      // Current Lora configuration
+	radioEventChan chan lora.RadioEvent // Channel for Receiving events
-	rfswitch       RFSwitch        // RF Switch, if any
+	loraConf       lora.Config          // Current Lora configuration
-	deepSleep      bool            // Internal Sleep state
+	controller     RadioController      // to manage interactions with the radio
-	deviceType     int             // sx1261,sx1262,sx1268 (defaults sx1261)
+	deepSleep      bool                 // Internal Sleep state
+	deviceType     int                  // sx1261,sx1262,sx1268 (defaults sx1261)
 	spiBuffer      [SPI_BUFFER_SIZE]uint8
 }
 
-// Config holds the LoRa configuration parameters
+// New creates a new SX126x connection.
-type LoraConfig struct {
+func New(spi drivers.SPI) *Device {
-	Freq           uint32 // Frequency
+	return &Device{
-	Cr             uint8  // Coding Rate
+		spi:            spi,
-	Sf             uint8  // Spread Factor
+		radioEventChan: make(chan lora.RadioEvent, 10),
-	Bw             uint8  // Bandwidth
+	}
-	Ldr            uint8  // Low Data Rate
-	Preamble       uint16 // PreambleLength
-	SyncWord       uint16 // Sync Word
-	HeaderType     uint8  // Header : Implicit/explicit
-	Crc            uint8  // CRC : Yes/No
-	Iq             uint8  // iq : Standard/inverted
-	LoraTxPowerDBm int8   // Tx power in Dbm
 }
 
 const (
 	SX126X_RTC_FREQ_IN_HZ uint32 = 64000
 )
 
-var (
-	errUndefinedLoraConf = errors.New("Undefined Lora configuration")
-)
-
 // --------------------------------------------------
 //  Helper functions
 // --------------------------------------------------
@@ -100,14 +77,8 @@ func timeoutMsToRtcSteps(timeoutMs uint32) uint32 {
 //	Channel and events
 //
 // --------------------------------------------------
-// NewRadioEvent() returns a new RadioEvent that can be used in the RadioChannel
-func NewRadioEvent(eType int, irqStatus uint16, eData []byte) RadioEvent {
-	r := RadioEvent{EventType: eType, IRQStatus: irqStatus, EventData: eData}
-	return r
-}
-
 // Get the RadioEvent channel of the device
-func (d *Device) GetRadioEventChan() chan RadioEvent {
+func (d *Device) GetRadioEventChan() chan lora.RadioEvent {
 	return d.radioEventChan
 }
 
@@ -116,16 +87,28 @@ func (d *Device) SetDeviceType(devType int) {
 	d.deviceType = devType
 }
 
-// SetRfSwitch let you define a custom RF Switch driver if needed
+// SetRadioControl let you define the RadioController
-func (d *Device) SetRfSwitch(rfswitch RFSwitch) {
+func (d *Device) SetRadioController(rc RadioController) error {
-	d.rfswitch = rfswitch
+	d.controller = rc
-	d.rfswitch.InitRFSwitch()
+	if err := d.controller.Init(); err != nil {
+		return err
+	}
+	d.controller.SetupInterrupts(d.HandleInterrupt)
+
+	return nil
 }
 
 // --------------------------------------------------
 // Operational modes functions
 // --------------------------------------------------
 
+func (d *Device) Reset() {
+	d.rstPin.Low()
+	time.Sleep(100 * time.Millisecond)
+	d.rstPin.High()
+	time.Sleep(100 * time.Millisecond)
+}
+
 // DetectDevice() tries to detect the radio module by changing SyncWord value
 func (d *Device) DetectDevice() bool {
 	bak := d.GetSyncWord()
@@ -156,18 +139,18 @@ func (d *Device) SetFs() {
 
 // SetTxContinuousWave set device in test mode to generate a continuous wave (RF tone)
 func (d *Device) SetTxContinuousWave() {
-	if d.rfswitch != nil {
+	if d.controller != nil {
-		d.rfswitch.SetRfSwitchMode(RFSWITCH_TX_HP)
+		d.controller.SetRfSwitchMode(RFSWITCH_TX_HP)
 	}
 	d.ExecSetCommand(SX126X_CMD_SET_TX_CONTINUOUS_WAVE, []uint8{})
 }
 
 // SetTxContinuousPreamble set device in test mode to constantly modulate LoRa preamble symbols.
-// Take care to initialize all Lora settings like it's done in LoraTx before calling this function
+// Take care to initialize all Lora settings like it's done in Tx before calling this function
 // If you don't init properly all the settings, it'll fail
 func (d *Device) SetTxContinuousPreamble() {
-	if d.rfswitch != nil {
+	if d.controller != nil {
-		d.rfswitch.SetRfSwitchMode(RFSWITCH_TX_HP)
+		d.controller.SetRfSwitchMode(RFSWITCH_TX_HP)
 	}
 	d.ExecSetCommand(SX126X_CMD_SET_TX_INFINITE_PREAMBLE, []uint8{})
 }
@@ -265,25 +248,25 @@ func (d *Device) SetRxTxFallbackMode(fallbackMode uint8) {
 // ReadRegister reads register value
 func (d *Device) ReadRegister(addr, size uint16) ([]uint8, error) {
 	d.CheckDeviceReady()
-	d.SpiSetNss(false)
+	d.controller.SetNss(false)
 	// Send command
 	cmd := []uint8{SX126X_CMD_READ_REGISTER, uint8((addr & 0xFF00) >> 8), uint8(addr & 0x00FF), 0x00}
 	d.spi.Tx(cmd, nil)
 	ret := d.spiBuffer[0:size]
 	d.spi.Tx(nil, ret)
-	d.SpiSetNss(true)
+	d.controller.SetNss(true)
-	d.WaitBusy()
+	d.controller.WaitWhileBusy()
 	return ret, nil
 }
 
 // WriteRegister writes value to register
 func (d *Device) WriteRegister(addr uint16, data []uint8) {
 	d.CheckDeviceReady()
-	d.SpiSetNss(false)
+	d.controller.SetNss(false)
 	cmd := []uint8{SX126X_CMD_WRITE_REGISTER, uint8((addr & 0xFF00) >> 8), uint8(addr & 0x00FF)}
 	d.spi.Tx(append(cmd, data...), nil)
-	d.SpiSetNss(true)
+	d.controller.SetNss(true)
-	d.WaitBusy()
+	d.controller.WaitWhileBusy()
 }
 
 // WriteBuffer write data from current buffer position
@@ -387,11 +370,11 @@ func (d *Device) SetPacketType(packetType uint8) {
 }
 
 // SetSyncWord defines the Sync Word to yse
-func (d *Device) SetSyncWord(syncword uint16) {
+func (d *Device) SetSyncWord(sw uint16) {
 	var p [2]uint8
-	d.loraConf.SyncWord = syncword
+	d.loraConf.SyncWord = sw
-	p[0] = uint8((syncword >> 8) & 0xFF)
+	p[0] = uint8((d.loraConf.SyncWord >> 8) & 0xFF)
-	p[1] = uint8((syncword >> 0) & 0xFF)
+	p[1] = uint8((d.loraConf.SyncWord >> 0) & 0xFF)
 	d.WriteRegister(SX126X_REG_LORA_SYNC_WORD_MSB, p[:])
 }
 
@@ -402,8 +385,8 @@ func (d *Device) GetSyncWord() uint16 {
 	return r
 }
 
-// SetLoraPublicNetwork sets Sync Word to 0x3444 (Public) or 0x1424 (Private)
+// SetPublicNetwork sets Sync Word to 0x3444 (Public) or 0x1424 (Private)
-func (d *Device) SetLoraPublicNetwork(enable bool) {
+func (d *Device) SetPublicNetwork(enable bool) {
 	if enable {
 		d.SetSyncWord(SX126X_LORA_MAC_PUBLIC_SYNCWORD)
 	} else {
@@ -496,12 +479,12 @@ func (d *Device) SetModulationParams(spreadingFactor, bandwidth, codingRate, low
 // CheckDeviceReady sleep until all busy flags clears
 func (d *Device) CheckDeviceReady() error {
 	if d.deepSleep == true {
-		d.SpiSetNss(false)
+		d.controller.SetNss(false)
 		time.Sleep(time.Millisecond)
-		d.SpiSetNss(true)
+		d.controller.SetNss(true)
 		d.deepSleep = false
 	}
-	return d.WaitBusy()
+	return d.controller.WaitWhileBusy()
 }
 
 // ExecSetCommand send a command to configure the peripheral
@@ -512,24 +495,24 @@ func (d *Device) ExecSetCommand(cmd uint8, buf []uint8) {
 	} else {
 		d.deepSleep = false
 	}
-	d.SpiSetNss(false)
+	d.controller.SetNss(false)
 	// Send command and params
 	d.spi.Tx(append([]uint8{cmd}, buf...), nil)
-	d.SpiSetNss(true)
+	d.controller.SetNss(true)
 	if cmd != SX126X_CMD_SET_SLEEP {
-		d.WaitBusy()
+		d.controller.WaitWhileBusy()
 	}
 }
 
 // ExecGetCommand queries the peripheral the peripheral
 func (d *Device) ExecGetCommand(cmd uint8, size uint8) []uint8 {
 	d.CheckDeviceReady()
-	d.SpiSetNss(false)
+	d.controller.SetNss(false)
 	// Send the command and flush first status byte (as not used)
 	d.spi.Tx([]uint8{cmd, 0x00}, nil)
 	d.spi.Tx(nil, d.spiBuffer[:size])
-	d.SpiSetNss(true)
+	d.controller.SetNss(true)
-	d.WaitBusy()
+	d.controller.WaitWhileBusy()
 	return d.spiBuffer[:size]
 }
 
@@ -537,47 +520,47 @@ func (d *Device) ExecGetCommand(cmd uint8, size uint8) []uint8 {
 // Configuration
 //
 
-// SetLoraFrequency() Sets current Lora Frequency
+// SetFrequency() Sets current Lora Frequency
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraFrequency(freq uint32) {
+func (d *Device) SetFrequency(freq uint32) {
-	d.loraConf.Freq = d.loraConf.Freq
+	d.loraConf.Freq = freq
 }
 
-// SetLoraIqMode() defines the current IQ Mode (Standard/Inverted)
+// SetIqMode() defines the current IQ Mode (Standard/Inverted)
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraIqMode(mode uint8) {
+func (d *Device) SetIqMode(mode uint8) {
 	if mode == 0 {
-		d.loraConf.Iq = SX126X_LORA_IQ_STANDARD
+		d.loraConf.Iq = lora.IQStandard
 	} else {
-		d.loraConf.Iq = SX126X_LORA_IQ_INVERTED
+		d.loraConf.Iq = lora.IQInverted
 	}
 }
 
-// SetLoraCodingRate() sets current Lora Coding Rate
+// SetCodingRate() sets current Lora Coding Rate
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraCodingRate(cr uint8) {
+func (d *Device) SetCodingRate(cr uint8) {
 	d.loraConf.Cr = cr
 }
 
-// SetLoraBandwidth() sets current Lora Bandwidth
+// SetBandwidth() sets current Lora Bandwidth
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraBandwidth(bw uint8) {
+func (d *Device) SetBandwidth(bw uint8) {
 	d.loraConf.Cr = bw
 }
 
-// SetLoraCrc() sets current CRC mode (ON/OFF)
+// SetCrc() sets current CRC mode (ON/OFF)
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraCrc(enable bool) {
+func (d *Device) SetCrc(enable bool) {
 	if enable {
-		d.loraConf.Crc = SX126X_LORA_CRC_ON
+		d.loraConf.Crc = lora.CRCOn
 	} else {
-		d.loraConf.Crc = SX126X_LORA_CRC_OFF
+		d.loraConf.Crc = lora.CRCOn
 	}
 }
 
-// SetLoraSpreadingFactor setc surrent Lora Spreading Factor
+// SetSpreadingFactor setc surrent Lora Spreading Factor
 // NB: Change will be applied at next RX / TX
-func (d *Device) SetLoraSpreadingFactor(sf uint8) {
+func (d *Device) SetSpreadingFactor(sf uint8) {
 	d.loraConf.Sf = sf
 }
 
@@ -587,9 +570,10 @@ func (d *Device) SetLoraSpreadingFactor(sf uint8) {
 //
 
 // LoraConfig() defines Lora configuration for next Lora operations
-func (d *Device) LoraConfig(cnf LoraConfig) {
+func (d *Device) LoraConfig(cnf lora.Config) {
 	// Save given configuration
 	d.loraConf = cnf
+	d.loraConf.SyncWord = syncword(int(cnf.SyncWord))
 	// Switch to standby prior to configuration changes
 	d.SetStandby()
 	// Clear errors, disable radio interrupts for the moment
@@ -599,24 +583,25 @@ func (d *Device) LoraConfig(cnf LoraConfig) {
 	// Define radio operation mode
 	d.SetPacketType(SX126X_PACKET_TYPE_LORA)
 	d.SetRfFrequency(d.loraConf.Freq)
-	d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
+	d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
 	d.SetTxParams(d.loraConf.LoraTxPowerDBm, SX126X_PA_RAMP_200U)
 	d.SetSyncWord(d.loraConf.SyncWord)
 	d.SetBufferBaseAddress(0, 0)
 }
 
-// LoraTx sends a lora packet, (with timeout)
+// Tx sends a lora packet, (with timeout)
-func (d *Device) LoraTx(pkt []uint8, timeoutMs uint32) error {
+func (d *Device) Tx(pkt []uint8, timeoutMs uint32) error {
-
 	if d.loraConf.Freq == 0 {
-		return errUndefinedLoraConf
+		return lora.ErrUndefinedLoraConf
 	}
-	if d.rfswitch != nil {
+
-		err := d.rfswitch.SetRfSwitchMode(RFSWITCH_TX_HP)
+	if d.controller != nil {
+		err := d.controller.SetRfSwitchMode(RFSWITCH_TX_HP)
 		if err != nil {
 			return err
 		}
 	}
+
 	d.ClearIrqStatus(SX126X_IRQ_ALL)
 	irqVal := uint16(SX126X_IRQ_TX_DONE | SX126X_IRQ_TIMEOUT | SX126X_IRQ_CRC_ERR)
 	d.SetStandby()
@@ -625,46 +610,47 @@ func (d *Device) LoraTx(pkt []uint8, timeoutMs uint32) error {
 	d.SetTxParams(d.loraConf.LoraTxPowerDBm, SX126X_PA_RAMP_200U)
 	d.SetBufferBaseAddress(0, 0)
 	d.WriteBuffer(pkt)
-	d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
+	d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
 	d.SetPacketParam(d.loraConf.Preamble, d.loraConf.HeaderType, d.loraConf.Crc, uint8(len(pkt)), d.loraConf.Iq)
 	d.SetDioIrqParams(irqVal, irqVal, SX126X_IRQ_NONE, SX126X_IRQ_NONE)
 	d.SetSyncWord(d.loraConf.SyncWord)
 	d.SetTx(timeoutMsToRtcSteps(timeoutMs))
 
 	msg := <-d.GetRadioEventChan()
-	if msg.EventType != RadioEventTxDone {
+	if msg.EventType != lora.RadioEventTxDone {
-		return errors.New("Unexpected Radio Event while TX")
+		return errUnexpectedTxRadioEvent
 	}
 	return nil
 }
 
 // LoraRx tries to receive a Lora packet (with timeout in milliseconds)
-func (d *Device) LoraRx(timeoutMs uint32) ([]uint8, error) {
+func (d *Device) Rx(timeoutMs uint32) ([]uint8, error) {
-
 	if d.loraConf.Freq == 0 {
-		return nil, errUndefinedLoraConf
+		return nil, lora.ErrUndefinedLoraConf
 	}
-	if d.rfswitch != nil {
+
-		err := d.rfswitch.SetRfSwitchMode(RFSWITCH_RX)
+	if d.controller != nil {
+		err := d.controller.SetRfSwitchMode(RFSWITCH_RX)
 		if err != nil {
 			return nil, err
 		}
 	}
+
 	d.ClearIrqStatus(SX126X_IRQ_ALL)
 	irqVal := uint16(SX126X_IRQ_RX_DONE | SX126X_IRQ_TIMEOUT | SX126X_IRQ_CRC_ERR)
 	d.SetStandby()
 	d.SetBufferBaseAddress(0, 0)
-	d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
+	d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
 	d.SetPacketParam(d.loraConf.Preamble, d.loraConf.HeaderType, d.loraConf.Crc, 0xFF, d.loraConf.Iq)
 	d.SetDioIrqParams(irqVal, irqVal, SX126X_IRQ_NONE, SX126X_IRQ_NONE)
 	d.SetRx(timeoutMsToRtcSteps(timeoutMs))
 
 	msg := <-d.GetRadioEventChan()
 
-	if msg.EventType == RadioEventTimeout {
+	if msg.EventType == lora.RadioEventTimeout {
 		return nil, nil
-	} else if msg.EventType != RadioEventRxDone {
+	} else if msg.EventType != lora.RadioEventRxDone {
-		return nil, errors.New("Unexpected Radio Event while RX")
+		return nil, errUnexpectedRxRadioEvent
 	}
 
 	pLen, pStart := d.GetRxBufferStatus()
@@ -683,19 +669,53 @@ func (d *Device) HandleInterrupt() {
 	rChan := d.GetRadioEventChan()
 
 	if (st & SX126X_IRQ_RX_DONE) > 0 {
-		rChan <- NewRadioEvent(RadioEventRxDone, st, nil)
+		rChan <- lora.NewRadioEvent(lora.RadioEventRxDone, st, nil)
 	}
 
 	if (st & SX126X_IRQ_TX_DONE) > 0 {
-		rChan <- NewRadioEvent(RadioEventTxDone, st, nil)
+		rChan <- lora.NewRadioEvent(lora.RadioEventTxDone, st, nil)
 	}
 
 	if (st & SX126X_IRQ_TIMEOUT) > 0 {
-		rChan <- NewRadioEvent(RadioEventTimeout, st, nil)
+		rChan <- lora.NewRadioEvent(lora.RadioEventTimeout, st, nil)
 	}
 
 	if (st & SX126X_IRQ_CRC_ERR) > 0 {
-		rChan <- NewRadioEvent(RadioEventCrcError, st, nil)
+		rChan <- lora.NewRadioEvent(lora.RadioEventCrcError, st, nil)
 	}
 
 }
+
+func bandwidth(bw uint8) uint8 {
+	switch bw {
+	case lora.Bandwidth_7_8:
+		return SX126X_LORA_BW_7_8
+	case lora.Bandwidth_10_4:
+		return SX126X_LORA_BW_10_4
+	case lora.Bandwidth_15_6:
+		return SX126X_LORA_BW_15_6
+	case lora.Bandwidth_20_8:
+		return SX126X_LORA_BW_20_8
+	case lora.Bandwidth_31_25:
+		return SX126X_LORA_BW_31_25
+	case lora.Bandwidth_41_7:
+		return SX126X_LORA_BW_41_7
+	case lora.Bandwidth_62_5:
+		return SX126X_LORA_BW_62_5
+	case lora.Bandwidth_125_0:
+		return SX126X_LORA_BW_125_0
+	case lora.Bandwidth_250_0:
+		return SX126X_LORA_BW_250_0
+	case lora.Bandwidth_500_0:
+		return SX126X_LORA_BW_500_0
+	default:
+		return 0
+	}
+}
+
+func syncword(sw int) uint16 {
+	if sw == lora.SyncPublic {
+		return SX126X_LORA_MAC_PUBLIC_SYNCWORD
+	}
+	return SX126X_LORA_MAC_PRIVATE_SYNCWORD
+}

sx127x/registers.go

@@ -0,0 +1,101 @@
+package sx127x
+
+const (
+	// registers
+	SX127X_REG_FIFO                 = 0x00
+	SX127X_REG_OP_MODE              = 0x01
+	SX127X_REG_FRF_MSB              = 0x06
+	SX127X_REG_FRF_MID              = 0x07
+	SX127X_REG_FRF_LSB              = 0x08
+	SX127X_REG_PA_CONFIG            = 0x09
+	SX127X_REG_PA_RAMP              = 0x0a
+	SX127X_REG_OCP                  = 0x0b
+	SX127X_REG_LNA                  = 0x0c
+	SX127X_REG_FIFO_ADDR_PTR        = 0x0d
+	SX127X_REG_FIFO_TX_BASE_ADDR    = 0x0e
+	SX127X_REG_FIFO_RX_BASE_ADDR    = 0x0f
+	SX127X_REG_FIFO_RX_CURRENT_ADDR = 0x10
+	SX127X_REG_IRQ_FLAGS_MASK       = 0x11
+	SX127X_REG_IRQ_FLAGS            = 0x12
+	SX127X_REG_RX_NB_BYTES          = 0x13
+	SX127X_REG_PKT_SNR_VALUE        = 0x19
+	SX127X_REG_PKT_RSSI_VALUE       = 0x1a
+	SX127X_REG_RSSI_VALUE           = 0x1b
+	SX127X_REG_MODEM_CONFIG_1       = 0x1d
+	SX127X_REG_MODEM_CONFIG_2       = 0x1e
+	SX127X_REG_SYMB_TIMEOUT_LSB     = 0x1f
+	SX127X_REG_PREAMBLE_MSB         = 0x20
+	SX127X_REG_PREAMBLE_LSB         = 0x21
+	SX127X_REG_PAYLOAD_LENGTH       = 0x22
+	SX127X_REG_MAX_PAYLOAD_LENGTH   = 0x23
+	SX127X_REG_HOP_PERIOD           = 0x24
+	SX127X_REG_MODEM_CONFIG_3       = 0x26
+	SX127X_REG_FREQ_ERROR_MSB       = 0x28
+	SX127X_REG_FREQ_ERROR_MID       = 0x29
+	SX127X_REG_FREQ_ERROR_LSB       = 0x2a
+	SX127X_REG_RSSI_WIDEBAND        = 0x2c
+	SX127X_REG_DETECTION_OPTIMIZE   = 0x31
+	SX127X_REG_INVERTIQ             = 0x33
+	SX127X_REG_DETECTION_THRESHOLD  = 0x37
+	SX127X_REG_SYNC_WORD            = 0x39
+	SX127X_REG_INVERTIQ2            = 0x3b
+	SX127X_REG_DIO_MAPPING_1        = 0x40
+	SX127X_REG_DIO_MAPPING_2        = 0x41
+	SX127X_REG_VERSION              = 0x42
+	SX127X_REG_PA_DAC               = 0x4d
+	// PA config
+	SX127X_PA_BOOST = 0x80
+
+	// Bits masking the corresponding IRQs from the radio
+	SX127X_IRQ_LORA_RXTOUT_MASK = uint8(0x80)
+	SX127X_IRQ_LORA_RXDONE_MASK = uint8(0x40)
+	SX127X_IRQ_LORA_CRCERR_MASK = uint8(0x20)
+	SX127X_IRQ_LORA_HEADER_MASK = uint8(0x10)
+	SX127X_IRQ_LORA_TXDONE_MASK = uint8(0x08)
+	SX127X_IRQ_LORA_CDDONE_MASK = uint8(0x04)
+	SX127X_IRQ_LORA_FHSSCH_MASK = uint8(0x02)
+	SX127X_IRQ_LORA_CDDETD_MASK = uint8(0x01)
+
+	// DIO function mappings                D0D1D2D3
+	SX127X_MAP_DIO0_LORA_RXDONE = uint8(0x00) // 00------
+	SX127X_MAP_DIO0_LORA_TXDONE = uint8(0x40) // 01------
+	SX127X_MAP_DIO1_LORA_RXTOUT = uint8(0x00) // --00----
+	SX127X_MAP_DIO1_LORA_NOP    = uint8(0x30) // --11----
+	SX127X_MAP_DIO2_LORA_NOP    = uint8(0xC0) // ----11--
+
+	SX127X_PAYLOAD_LENGTH = uint8(0x40)
+
+	// Low Noise Amp
+	SX127X_LNA_MAX_GAIN = uint8(0x23)
+	SX127X_LNA_OFF_GAIN = uint8(0x00)
+	SX127X_LNA_LOW_GAIN = uint8(0x20)
+
+	// Bandwidth
+	SX127X_LORA_BW_7_8   = uint8(0x00)
+	SX127X_LORA_BW_10_4  = uint8(0x01)
+	SX127X_LORA_BW_15_6  = uint8(0x02)
+	SX127X_LORA_BW_20_8  = uint8(0x03)
+	SX127X_LORA_BW_31_25 = uint8(0x04)
+	SX127X_LORA_BW_41_7  = uint8(0x05)
+	SX127X_LORA_BW_62_5  = uint8(0x06)
+	SX127X_LORA_BW_125_0 = uint8(0x07)
+	SX127X_LORA_BW_250_0 = uint8(0x08)
+	SX127X_LORA_BW_500_0 = uint8(0x09)
+	// Automatic gain control
+	SX127X_AGC_AUTO_OFF = uint8(0x00)
+	SX127X_AGC_AUTO_ON  = uint8(0x01)
+	// Operation modes
+	SX127X_OPMODE_LORA      = uint8(0x80)
+	SX127X_OPMODE_MASK      = uint8(0x07)
+	SX127X_OPMODE_SLEEP     = uint8(0x00)
+	SX127X_OPMODE_STANDBY   = uint8(0x01)
+	SX127X_OPMODE_FSTX      = uint8(0x02)
+	SX127X_OPMODE_TX        = uint8(0x03)
+	SX127X_OPMODE_FSRX      = uint8(0x04)
+	SX127X_OPMODE_RX        = uint8(0x05)
+	SX127X_OPMODE_RX_SINGLE = uint8(0x06)
+	SX127X_OPMODE_CAD       = uint8(0x07)
+
+	SX127X_LORA_MAC_PUBLIC_SYNCWORD  = 0x34
+	SX127X_LORA_MAC_PRIVATE_SYNCWORD = 0x14
+)

sx127x/sx127x.go

@@ -0,0 +1,530 @@
+// Package sx127x provides a driver for SX127x LoRa transceivers.
+// References:
+// https://electronics.stackexchange.com/questions/394296/can-t-get-simple-lora-receiver-to-work
+// https://www.st.com/resource/en/user_manual/dm00300436-stm32-lora-expansion-package-for-stm32cube-stmicroelectronics.pdf
+package sx127x
+
+import (
+	"errors"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers"
+	"tinygo.org/x/drivers/lora"
+)
+
+// So we can keep track of the origin of interruption
+const (
+	SPI_BUFFER_SIZE = 256
+)
+
+// Device wraps an SPI connection to a SX127x device.
+type Device struct {
+	spi            drivers.SPI          // SPI bus for module communication
+	rstPin, csPin  machine.Pin          // GPIOs for reset and chip select
+	radioEventChan chan lora.RadioEvent // Channel for Receiving events
+	loraConf       lora.Config          // Current Lora configuration
+	deepSleep      bool                 // Internal Sleep state
+	deviceType     int                  // sx1261,sx1262,sx1268 (defaults sx1261)
+	spiBuffer      [SPI_BUFFER_SIZE]uint8
+	packetIndex    uint8 // FIXME ... useless ?
+}
+
+// --------------------------------------------------
+//
+//	Channel and events
+//
+// --------------------------------------------------
+// Get the RadioEvent channel of the device
+func (d *Device) GetRadioEventChan() chan lora.RadioEvent {
+	return d.radioEventChan
+}
+
+// New creates a new SX127x connection. The SPI bus must already be configured.
+func New(spi machine.SPI, csPin machine.Pin, rstPin machine.Pin) *Device {
+	k := Device{
+		spi:            spi,
+		csPin:          csPin,
+		rstPin:         rstPin,
+		radioEventChan: make(chan lora.RadioEvent, 10),
+	}
+	return &k
+}
+
+// Reset re-initialize the sx127x device
+func (d *Device) Reset() {
+	d.rstPin.Low()
+	time.Sleep(100 * time.Millisecond)
+	d.rstPin.High()
+	time.Sleep(100 * time.Millisecond)
+}
+
+// DetectDevice checks if device responds on the SPI bus
+func (d *Device) DetectDevice() bool {
+	id := d.GetVersion()
+	return (id == 0x12)
+}
+
+// ReadRegister reads register value
+func (d *Device) ReadRegister(reg uint8) uint8 {
+	d.csPin.Low()
+	d.spi.Tx([]byte{reg & 0x7f}, nil)
+	var value [1]byte
+	d.spi.Tx(nil, value[:])
+	d.csPin.High()
+	return value[0]
+}
+
+// WriteRegister writes value to register
+func (d *Device) WriteRegister(reg uint8, value uint8) uint8 {
+	var response [1]byte
+	d.csPin.Low()
+	d.spi.Tx([]byte{reg | 0x80}, nil)
+	d.spi.Tx([]byte{value}, response[:])
+	d.csPin.High()
+	return response[0]
+}
+
+// SetOpMode changes the sx1276 mode
+func (d *Device) SetOpMode(mode uint8) {
+	cur := d.ReadRegister(SX127X_REG_OP_MODE)
+	new := (cur & (^SX127X_OPMODE_MASK)) | mode
+	d.WriteRegister(SX127X_REG_OP_MODE, new)
+}
+
+// SetOpMode changes the sx1276 mode
+func (d *Device) SetOpModeLora() {
+	d.WriteRegister(SX127X_REG_OP_MODE, SX127X_OPMODE_LORA)
+}
+
+// GetVersion returns hardware version of sx1276 chipset
+func (d *Device) GetVersion() uint8 {
+	return (d.ReadRegister(SX127X_REG_VERSION))
+}
+
+// IsTransmitting tests if a packet transmission is in progress
+func (d *Device) IsTransmitting() bool {
+	return (d.ReadRegister(SX127X_REG_OP_MODE) & SX127X_OPMODE_TX) == SX127X_OPMODE_TX
+}
+
+// LastPacketRSSI gives the RSSI of the last packet received
+func (d *Device) LastPacketRSSI() uint8 {
+	// section 5.5.5
+	var adjustValue uint8 = 157
+	if d.loraConf.Freq < 868000000 {
+		adjustValue = 164
+	}
+	return d.ReadRegister(SX127X_REG_PKT_RSSI_VALUE) - adjustValue
+}
+
+// LastPacketSNR gives the SNR of the last packet received
+func (d *Device) LastPacketSNR() uint8 {
+	return uint8(d.ReadRegister(SX127X_REG_PKT_SNR_VALUE) / 4)
+}
+
+// GetRSSI returns current RSSI
+func (d *Device) GetRSSI() uint8 {
+	return d.ReadRegister(SX127X_REG_RSSI_VALUE)
+}
+
+/*
+// GetBandwidth returns the bandwidth the LoRa module is using
+func (d *Device) GetBandwidth() int32 {
+	return int32(d.loraConf.Bw)
+}
+*/
+
+// SetTxPower sets the transmitter output power
+func (d *Device) SetTxPower(txPower int8, paBoost bool) {
+	if !paBoost {
+		// RFO
+		if txPower < 0 {
+			txPower = 0
+		} else if txPower > 14 {
+			txPower = 14
+		}
+		d.WriteRegister(SX127X_REG_PA_CONFIG, uint8(0x70)|uint8(txPower))
+
+	} else {
+		//PA_BOOST
+		if txPower > 17 {
+			if txPower > 20 {
+				txPower = 20
+			}
+
+			txPower -= 3
+
+			// High Power +20 dBm Operation (Semtech SX1276/77/78/79 5.4.3.)
+			d.WriteRegister(SX127X_REG_PA_DAC, 0x87)
+			d.SetOCP(140)
+		} else {
+			if txPower < 2 {
+				txPower = 2
+			}
+
+			d.WriteRegister(SX127X_REG_PA_DAC, 0x84)
+			d.SetOCP(100)
+
+		}
+
+		d.WriteRegister(SX127X_REG_PA_CONFIG, uint8(SX127X_PA_BOOST)|uint8(txPower-2))
+
+	}
+}
+
+// ---------------
+// Internal functions
+// ---------------
+
+// SetRxTimeout defines RX Timeout expressed as number of symbols
+// Default timeout is 64 * Ts
+func (d *Device) SetRxTimeout(tmoutSymb uint8) {
+	d.WriteRegister(SX127X_REG_SYMB_TIMEOUT_LSB, tmoutSymb)
+}
+
+// SetOCP defines Overload Current Protection configuration
+func (d *Device) SetOCP(mA uint8) {
+	ocpTrim := uint8(27)
+	if mA < 45 {
+		mA = 45
+	}
+	if mA <= 120 {
+		ocpTrim = (mA - 45) / 5
+	} else if mA <= 240 {
+		ocpTrim = (mA + 30) / 10
+	}
+	d.WriteRegister(SX127X_REG_OCP, 0x20|(0x1F&ocpTrim))
+}
+
+// SetAgcAutoOn enables Automatic Gain Control
+func (d *Device) SetAgcAuto(val uint8) {
+	if val == SX127X_AGC_AUTO_ON {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_3, d.ReadRegister(SX127X_REG_MODEM_CONFIG_3)|0x04)
+	} else {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_3, d.ReadRegister(SX127X_REG_MODEM_CONFIG_3)&0xfb)
+	}
+}
+
+// SetLowDataRateOptimize enables Low Data Rate Optimization
+func (d *Device) SetLowDataRateOptim(val uint8) {
+	if val == lora.LowDataRateOptimizeOn {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_3, d.ReadRegister(SX127X_REG_MODEM_CONFIG_3)|0x08)
+	} else {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_3, d.ReadRegister(SX127X_REG_MODEM_CONFIG_3)&0xf7)
+	}
+}
+
+// SetLowFrequencyModeOn enables Low Data Rate Optimization
+func (d *Device) SetLowFrequencyModeOn(val bool) {
+	if val {
+		d.WriteRegister(SX127X_REG_OP_MODE, d.ReadRegister(SX127X_REG_OP_MODE)|0x04)
+	} else {
+		d.WriteRegister(SX127X_REG_OP_MODE, d.ReadRegister(SX127X_REG_OP_MODE)&0xfb)
+	}
+}
+
+// SetHopPeriod sets number of symbol periods between frequency hops. (0 = disabled).
+func (d *Device) SetHopPeriod(val uint8) {
+	d.WriteRegister(SX127X_REG_HOP_PERIOD, val)
+}
+
+//
+// LORA FUNCTIONS
+//
+
+// LoraConfig() defines Lora configuration for next Lora operations
+func (d *Device) LoraConfig(cnf lora.Config) {
+	// Save given configuration
+	d.loraConf = cnf
+	d.loraConf.SyncWord = syncword(int(cnf.SyncWord))
+}
+
+// SetFrequency updates the frequency the LoRa module is using
+func (d *Device) SetFrequency(frequency uint32) {
+	d.loraConf.Freq = frequency
+	var frf = (uint64(frequency) << 19) / 32000000
+	d.WriteRegister(SX127X_REG_FRF_MSB, uint8(frf>>16))
+	d.WriteRegister(SX127X_REG_FRF_MID, uint8(frf>>8))
+	d.WriteRegister(SX127X_REG_FRF_LSB, uint8(frf>>0))
+}
+
+// SetBandwidth updates the bandwidth the LoRa module is using
+func (d *Device) SetBandwidth(bw uint8) {
+	d.loraConf.Bw = bandwidth(bw)
+	d.WriteRegister(SX127X_REG_MODEM_CONFIG_1, (d.ReadRegister(SX127X_REG_MODEM_CONFIG_1)&0x0f)|(bw<<4))
+}
+
+// SetCodingRate updates the coding rate the LoRa module is using
+func (d *Device) SetCodingRate(cr uint8) {
+	d.loraConf.Cr = cr
+	d.WriteRegister(SX127X_REG_MODEM_CONFIG_1, (d.ReadRegister(SX127X_REG_MODEM_CONFIG_1)&0xf1)|(cr<<1))
+}
+
+// SetImplicitHeaderModeOn Enables implicit header mode ***
+func (d *Device) SetHeaderMode(headerType uint8) {
+	d.loraConf.HeaderType = headerType
+	if headerType == lora.HeaderImplicit {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_1, d.ReadRegister(SX127X_REG_MODEM_CONFIG_1)|0x01)
+	} else {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_1, d.ReadRegister(SX127X_REG_MODEM_CONFIG_1)&0xfe)
+	}
+}
+
+// SetSpreadingFactor changes spreading factor
+func (d *Device) SetSpreadingFactor(sf uint8) {
+	d.loraConf.Sf = sf
+	if sf == lora.SpreadingFactor6 {
+		d.WriteRegister(SX127X_REG_DETECTION_OPTIMIZE, 0xc5)
+		d.WriteRegister(SX127X_REG_DETECTION_THRESHOLD, 0x0c)
+	} else {
+		d.WriteRegister(SX127X_REG_DETECTION_OPTIMIZE, 0xc3)
+		d.WriteRegister(SX127X_REG_DETECTION_THRESHOLD, 0x0a)
+	}
+	var newValue = (d.ReadRegister(SX127X_REG_MODEM_CONFIG_2) & 0x0f) | ((sf << 4) & 0xf0)
+	d.WriteRegister(SX127X_REG_MODEM_CONFIG_2, newValue)
+}
+
+// SetTxContinuousMode enable Continuous Tx mode
+func (d *Device) SetTxContinuousMode(val bool) {
+	if val {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_2, d.ReadRegister(SX127X_REG_MODEM_CONFIG_2)|0x08)
+	} else {
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_2, d.ReadRegister(SX127X_REG_MODEM_CONFIG_2)&0xf7)
+	}
+}
+
+// SetCrc Enable CRC generation and check on payload
+func (d *Device) SetCrc(enable bool) {
+	if enable {
+		d.loraConf.Crc = lora.CRCOn
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_2, d.ReadRegister(SX127X_REG_MODEM_CONFIG_2)|0x04)
+	} else {
+		d.loraConf.Crc = lora.CRCOff
+		d.WriteRegister(SX127X_REG_MODEM_CONFIG_2, d.ReadRegister(SX127X_REG_MODEM_CONFIG_2)&0xfb)
+	}
+}
+
+func (d *Device) SetPreamble(pLen uint16) {
+	// Sets preamble length
+	d.WriteRegister(SX127X_REG_PREAMBLE_MSB, uint8((pLen>>8)&0xFF))
+	d.WriteRegister(SX127X_REG_PREAMBLE_LSB, uint8(pLen&0xFF))
+}
+
+// SetSyncWord defines sync word
+func (d *Device) SetSyncWord(syncWord uint16) {
+	d.loraConf.SyncWord = syncWord
+	sw := uint8(syncWord & 0xFF)
+	d.WriteRegister(SX127X_REG_SYNC_WORD, sw)
+}
+
+// SetIQMode Sets I/Q polarity configuration
+func (d *Device) SetIqMode(val uint8) {
+	d.loraConf.Iq = val
+	if val == lora.IQStandard {
+		//Set IQ to normal values
+		d.WriteRegister(SX127X_REG_INVERTIQ, 0x27)
+		d.WriteRegister(SX127X_REG_INVERTIQ2, 0x1D)
+	} else {
+		//Invert IQ Back
+		d.WriteRegister(SX127X_REG_INVERTIQ, 0x66)
+		d.WriteRegister(SX127X_REG_INVERTIQ2, 0x19)
+	}
+}
+
+// Tx sends a lora packet, (with timeout)
+func (d *Device) Tx(pkt []uint8, timeoutMs uint32) error {
+	d.SetOpModeLora()
+	d.SetOpMode(SX127X_OPMODE_SLEEP)
+
+	d.SetHopPeriod(0x00)
+	d.SetLowFrequencyModeOn(false)                                                      // High freq mode
+	d.WriteRegister(SX127X_REG_PA_RAMP, (d.ReadRegister(SX127X_REG_PA_RAMP)&0xF0)|0x08) // set PA ramp-up time 50 uSec
+	d.WriteRegister(SX127X_REG_LNA, SX127X_LNA_MAX_GAIN)                                // Set Low Noise Amplifier to MAX
+
+	d.SetFrequency(d.loraConf.Freq)
+	d.SetPreamble(d.loraConf.Preamble)
+	d.SetSyncWord(d.loraConf.SyncWord)
+	d.SetBandwidth(d.loraConf.Bw)
+	d.SetSpreadingFactor(d.loraConf.Sf)
+	d.SetIqMode(d.loraConf.Iq)
+	d.SetCodingRate(d.loraConf.Cr)
+	d.SetCrc(d.loraConf.Crc == lora.CRCOn)
+	d.SetTxPower(d.loraConf.LoraTxPowerDBm, true)
+	d.SetHeaderMode(d.loraConf.HeaderType)
+	d.SetAgcAuto(SX127X_AGC_AUTO_ON)
+
+	// set the IRQ mapping DIO0=TxDone DIO1=NOP DIO2=NOP
+	d.WriteRegister(SX127X_REG_DIO_MAPPING_1, SX127X_MAP_DIO0_LORA_TXDONE|SX127X_MAP_DIO1_LORA_NOP|SX127X_MAP_DIO2_LORA_NOP)
+	// Clear all radio IRQ Flags
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS, 0xFF)
+	// Mask all but TxDone
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS_MASK, ^SX127X_IRQ_LORA_TXDONE_MASK)
+
+	// initialize the payload size and address pointers
+	d.WriteRegister(SX127X_REG_PAYLOAD_LENGTH, uint8(len(pkt)))
+	d.WriteRegister(SX127X_REG_FIFO_TX_BASE_ADDR, 0)
+	d.WriteRegister(SX127X_REG_FIFO_ADDR_PTR, 0)
+
+	// FIFO OPs cannot take place in Sleep mode !!!
+	d.SetOpMode(SX127X_OPMODE_STANDBY)
+	time.Sleep(time.Millisecond)
+	// Copy payload to FIFO // TODO: Bulk
+	for i := 0; i < len(pkt); i++ {
+		d.WriteRegister(SX127X_REG_FIFO, pkt[i])
+	}
+
+	// Enable TX
+	d.SetOpMode(SX127X_OPMODE_TX)
+
+	msg := <-d.GetRadioEventChan()
+	if msg.EventType != lora.RadioEventTxDone {
+		return errors.New("Unexpected Radio Event while TX " + string(0x30+msg.EventType))
+	}
+	return nil
+}
+
+// Rx tries to receive a Lora packet (with timeout in milliseconds)
+func (d *Device) Rx(timeoutMs uint32) ([]uint8, error) {
+	if d.loraConf.Freq == 0 {
+		return nil, lora.ErrUndefinedLoraConf
+	}
+
+	d.SetOpModeLora()
+	d.SetOpMode(SX127X_OPMODE_SLEEP)
+
+	d.SetHopPeriod(0x00)
+	d.SetLowFrequencyModeOn(false)                                                      // High freq mode
+	d.WriteRegister(SX127X_REG_PA_RAMP, (d.ReadRegister(SX127X_REG_PA_RAMP)&0xF0)|0x08) // set PA ramp-up time 50 uSec
+	d.WriteRegister(SX127X_REG_LNA, SX127X_LNA_MAX_GAIN)                                // Set Low Noise Amplifier to MAX
+
+	d.SetFrequency(d.loraConf.Freq)
+	d.SetPreamble(d.loraConf.Preamble)
+	d.SetSyncWord(d.loraConf.SyncWord)
+	d.SetBandwidth(d.loraConf.Bw)
+	d.SetSpreadingFactor(d.loraConf.Sf)
+	d.SetIqMode(d.loraConf.Iq)
+	d.SetCodingRate(d.loraConf.Cr)
+	d.SetCrc(d.loraConf.Crc == lora.CRCOn)
+	d.SetTxPower(d.loraConf.LoraTxPowerDBm, true)
+	d.SetHeaderMode(d.loraConf.HeaderType)
+	d.SetAgcAuto(SX127X_AGC_AUTO_ON)
+
+	// set the IRQ mapping DIO0=RxDone DIO1=RxTimeout DIO2=NOP
+	d.WriteRegister(SX127X_REG_DIO_MAPPING_1, SX127X_MAP_DIO0_LORA_RXDONE|SX127X_MAP_DIO1_LORA_RXTOUT|SX127X_MAP_DIO2_LORA_NOP)
+	// Clear all radio IRQ Flags
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS, 0xFF)
+	// Mask all but RxDone
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS_MASK, ^(SX127X_IRQ_LORA_RXDONE_MASK | SX127X_IRQ_LORA_RXTOUT_MASK))
+	// Switch to RX Mode
+	d.SetOpMode(SX127X_OPMODE_RX_SINGLE) //
+	// Wait for Radio Event
+
+	radioCh := d.GetRadioEventChan()
+
+	msg := <-radioCh
+	if msg.EventType == lora.RadioEventTimeout {
+		return nil, nil
+	} else if msg.EventType != lora.RadioEventRxDone {
+		return nil, errors.New("Unexpected Radio Event while RX " + string(0x30+msg.EventType))
+	}
+
+	d.WriteRegister(SX127X_REG_FIFO_RX_BASE_ADDR, 0)
+	d.WriteRegister(SX127X_REG_FIFO_ADDR_PTR, 0)
+
+	pLen := d.ReadRegister(SX127X_REG_RX_NB_BYTES)
+	d.WriteRegister(SX127X_REG_FIFO_ADDR_PTR, d.ReadRegister(SX127X_REG_FIFO_RX_CURRENT_ADDR))
+
+	for i := uint8(0); i < pLen; i++ {
+		d.spiBuffer[i] = d.ReadRegister(SX127X_REG_FIFO)
+	}
+	return d.spiBuffer[:pLen], nil
+}
+
+//
+// HELPER FUNCTIONS
+//
+
+// PrintRegisters outputs the sx127x transceiver registers
+func (d *Device) PrintRegisters(compact bool) {
+	for i := uint8(0); i < 128; i++ {
+		v := d.ReadRegister(i)
+		print(v, " ")
+	}
+	println()
+}
+
+// PrintRegisters outputs the sx127x transceiver registers
+func (d *Device) RandomU32() uint32 {
+	// Disable ALL irqs
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS, 0xFF)
+	d.SetOpModeLora()
+	d.SetOpMode(SX127X_OPMODE_SLEEP)
+	d.SetFrequency(d.loraConf.Freq)
+	d.SetOpMode(SX127X_OPMODE_RX)
+	rnd := uint32(0)
+	for i := 0; i < 32; i++ {
+		time.Sleep(time.Millisecond * 10)
+		// Unfiltered RSSI value reading. Only takes the LSB value
+		rnd |= (uint32(d.ReadRegister(SX127X_REG_RSSI_WIDEBAND)) & 0x01) << i
+	}
+	return rnd
+}
+
+// HandleInterrupt must be called by main code on DIO state change.
+func (d *Device) HandleInterrupt() {
+	// Get IRQ and clear
+	st := d.ReadRegister(SX127X_REG_IRQ_FLAGS)
+	d.WriteRegister(SX127X_REG_IRQ_FLAGS, 0xFF)
+
+	rChan := d.GetRadioEventChan()
+
+	if (st & SX127X_IRQ_LORA_RXDONE_MASK) > 0 {
+		rChan <- lora.NewRadioEvent(lora.RadioEventRxDone, uint16(st), nil)
+	}
+
+	if (st & SX127X_IRQ_LORA_TXDONE_MASK) > 0 {
+		rChan <- lora.NewRadioEvent(lora.RadioEventTxDone, uint16(st), nil)
+	}
+
+	if (st & SX127X_IRQ_LORA_RXTOUT_MASK) > 0 {
+		rChan <- lora.NewRadioEvent(lora.RadioEventTimeout, uint16(st), nil)
+	}
+
+	if (st & SX127X_IRQ_LORA_CRCERR_MASK) > 0 {
+		rChan <- lora.NewRadioEvent(lora.RadioEventCrcError, uint16(st), nil)
+	}
+}
+
+func bandwidth(bw uint8) uint8 {
+	switch bw {
+	case lora.Bandwidth_7_8:
+		return SX127X_LORA_BW_7_8
+	case lora.Bandwidth_10_4:
+		return SX127X_LORA_BW_10_4
+	case lora.Bandwidth_15_6:
+		return SX127X_LORA_BW_15_6
+	case lora.Bandwidth_20_8:
+		return SX127X_LORA_BW_20_8
+	case lora.Bandwidth_31_25:
+		return SX127X_LORA_BW_31_25
+	case lora.Bandwidth_41_7:
+		return SX127X_LORA_BW_41_7
+	case lora.Bandwidth_62_5:
+		return SX127X_LORA_BW_62_5
+	case lora.Bandwidth_125_0:
+		return SX127X_LORA_BW_125_0
+	case lora.Bandwidth_250_0:
+		return SX127X_LORA_BW_250_0
+	case lora.Bandwidth_500_0:
+		return SX127X_LORA_BW_500_0
+	default:
+		return 0
+	}
+}
+
+func syncword(sw int) uint16 {
+	if sw == lora.SyncPublic {
+		return SX127X_LORA_MAC_PUBLIC_SYNCWORD
+	}
+	return SX127X_LORA_MAC_PRIVATE_SYNCWORD
+}