mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-07-26 02:28:41 +00:00
ws2812: add support for the ESP32-C3 processor
This adds support to the WS2812 for the ESP32-C3 processor which is a RISC-V processor from Espressif. Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
@@ -1,4 +1,4 @@
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//go:build !digispark && !arduino && !arduino_uno
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//go:build !digispark && !arduino && !arduino_uno && !xiao_esp32c3
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package main
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@@ -0,0 +1,11 @@
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//go:build xiao_esp32c3
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package main
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import "machine"
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func init() {
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// Replace neo in the code below to match the pin
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// that you are using if different.
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neo = machine.D6
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}
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@@ -93,6 +93,7 @@ tinygo build -size short -o ./build/test.bin -target=m5stamp-c3 ./examp
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tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/is31fl3731/main.go
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tinygo build -size short -o ./build/test.hex -target=arduino ./examples/ws2812
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tinygo build -size short -o ./build/test.hex -target=digispark ./examples/ws2812
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tinygo build -size short -o ./build/test.bin -target=xiao-esp32c3 ./examples/ws2812
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tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bme280/main.go
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tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/microphone/main.go
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tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/buzzer/main.go
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+49
-5
@@ -17,7 +17,8 @@ import (
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// the new assembly implementation - no fiddly timings to calculate and no nops
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// to count!
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//
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// Right now this is specific to Cortex-M chips and assume the following things:
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// Right now this is specific to specific chips:
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// On Cortex-M chips it assume the following things:
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// - Arithmetic operations (shift, add, sub) take up 1 clock cycle.
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// - The nop instruction also takes up 1 clock cycle.
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// - Store instructions (to the GPIO pins) take up 2 clock cycles.
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@@ -25,8 +26,15 @@ import (
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// depends on whether the branch is taken or not. On the M4, the documentation
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// is less clear but it appears the instruction is still 1 to 3 cycles
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// (possibly including some branch prediction).
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// It is certainly possible to extend this to other architectures, such as AVR
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// and RISC-V if needed.
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// On RISC-V chips it assumes the following things:
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// - Arithmetic operations (shift, add, sub) take up 1 clock cycle.
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// - The nop instruction also takes up 1 clock cycle.
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// - Store instructions (to the GPIO pins) take up 1 clock cycle.
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// - Branch instructions can take up 1 or 3 clock cycles, depending on branch
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// prediction. This is based on the SiFive FE310 CPU, but hopefully it
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// generalizes to other RISC-V chips as well.
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// It is certainly possible to extend this to other architectures, such as AVR as needed.
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//
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// Here are two important resources. For the timings:
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// https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
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@@ -45,6 +53,7 @@ type architectureImpl struct {
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maxBaseCyclesT1H int
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minBaseCyclesTLD int
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valueTemplate string // template for how to pass the 'c' byte to assembly
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funcAttr string // C function attribute (default: always_inline)
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template string // assembly template
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}
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@@ -83,7 +92,7 @@ var architectures = map[string]architectureImpl{
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// - branches are 1 or 3 cycles, depending on branch prediction
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// - ALU operations are 1 cycle (as on most CPUs)
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// Hopefully this generalizes to other chips.
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buildTag: "tinygo.riscv32",
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buildTag: "tinygo.riscv32 && !esp32c3",
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minBaseCyclesT0H: 1 + 1 + 1, // shift + branch (not taken) + store
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maxBaseCyclesT0H: 1 + 3 + 1, // shift + branch (not taken) + store
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minBaseCyclesT1H: 1 + 1 + 1, // shift + branch (taken) + store
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@@ -103,6 +112,37 @@ var architectures = map[string]architectureImpl{
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@DELAY3
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addi %[i], %[i], -1 // [1]
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bnez %[i], 1b // [1/3] send_bit
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`,
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},
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"esp32c3": {
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// ESP32-C3 RISC-V core:
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// - stores are 1 cycle
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// - branches are 1 or 3 cycles
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// - ALU operations are 1 cycle
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// Uses the same instruction timing as the SiFive FE310, but the
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// function is placed in IRAM instead of flash to avoid instruction
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// cache miss stalls that would destroy WS2812 timing.
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buildTag: "esp32c3",
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minBaseCyclesT0H: 1 + 1 + 1, // shift + branch (not taken) + store
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maxBaseCyclesT0H: 1 + 3 + 1, // shift + branch (not taken) + store
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minBaseCyclesT1H: 1 + 1 + 1, // shift + branch (taken) + store
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maxBaseCyclesT1H: 1 + 3 + 1, // shift + branch (taken) + store
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minBaseCyclesTLD: 1 + 1 + 1, // subtraction + branch + store (in next cycle)
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valueTemplate: "(uint32_t)c << 23",
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funcAttr: `__attribute__((section(".iram1"), noinline))`,
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template: `
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1: // send_bit
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sw %[maskSet], %[portSet] // [1] T0H and T0L start here
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@DELAY1
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slli %[value], %[value], 1 // [1] shift value left by 1
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bltz %[value], 2f // [1/3] skip_store
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sw %[maskClear], %[portClear] // [1] T0H -> T0L transition
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2: // skip_store
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@DELAY2
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sw %[maskClear], %[portClear] // [1] T1H -> T1L transition
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@DELAY3
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addi %[i], %[i], -1 // [1]
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bnez %[i], 1b // [1/3] send_bit
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`,
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},
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}
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@@ -208,7 +248,11 @@ func writeCAssembly(f *os.File, arch string, megahertz int) error {
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// ignore I/O errors.
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buf := &bytes.Buffer{}
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fmt.Fprintf(buf, "\n")
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fmt.Fprintf(buf, "__attribute__((always_inline))\nvoid ws2812_writeByte%d(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {\n", megahertz)
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funcAttr := archImpl.funcAttr
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if funcAttr == "" {
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funcAttr = "__attribute__((always_inline))"
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}
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fmt.Fprintf(buf, "%s\nvoid ws2812_writeByte%d(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {\n", funcAttr, megahertz)
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fmt.Fprintf(buf, " // Timings:\n")
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fmt.Fprintf(buf, " // T0H: %2d - %2d cycles or %.1fns - %.1fns\n", actualMinCyclesT0H, actualMaxCyclesT0H, actualMinNanosecondsT0H, actualMaxNanosecondsT0H)
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fmt.Fprintf(buf, " // T1H: %2d - %2d cycles or %.1fns - %.1fns\n", actualMinCyclesT1H, actualMaxCyclesT1H, actualMinNanosecondsT1H, actualMaxNanosecondsT1H)
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@@ -0,0 +1,396 @@
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//go:build esp32c3
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package ws2812
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// Warning: autogenerated file. Instead of modifying this file, change
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// gen-ws2812.go and run "go generate".
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import "runtime/interrupt"
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import "unsafe"
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/*
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#include <stdint.h>
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__attribute__((section(".iram1"), noinline))
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void ws2812_writeByte160(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {
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// Timings:
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// T0H: 56 - 58 cycles or 350.0ns - 362.5ns
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// T1H: 168 - 170 cycles or 1050.0ns - 1062.5ns
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// TLD: 184 - cycles or 1150.0ns -
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uint32_t value = (uint32_t)c << 23;
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char i = 8;
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__asm__ __volatile__(
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"1: // send_bit\n"
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"\t sw %[maskSet], %[portSet] // [1] T0H and T0L start here\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t slli %[value], %[value], 1 // [1] shift value left by 1\n"
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"\t bltz %[value], 2f // [1/3] skip_store\n"
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"\t sw %[maskClear], %[portClear] // [1] T0H -> T0L transition\n"
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"\t2: // skip_store\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
|
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"\t nop\n"
|
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"\t nop\n"
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"\t nop\n"
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"\t sw %[maskClear], %[portClear] // [1] T1H -> T1L transition\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
|
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
|
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t addi %[i], %[i], -1 // [1]\n"
|
||||
"\t bnez %[i], 1b // [1/3] send_bit\n"
|
||||
: [value]"+r"(value),
|
||||
[i]"+r"(i)
|
||||
: [maskSet]"r"(maskSet),
|
||||
[portSet]"m"(*portSet),
|
||||
[maskClear]"r"(maskClear),
|
||||
[portClear]"m"(*portClear));
|
||||
}
|
||||
*/
|
||||
import "C"
|
||||
|
||||
func (d Device) writeByte160(c byte) {
|
||||
portSet, maskSet := d.Pin.PortMaskSet()
|
||||
portClear, maskClear := d.Pin.PortMaskClear()
|
||||
|
||||
mask := interrupt.Disable()
|
||||
C.ws2812_writeByte160(C.char(c), (*C.uint32_t)(unsafe.Pointer(portSet)), (*C.uint32_t)(unsafe.Pointer(portClear)), C.uint32_t(maskSet), C.uint32_t(maskClear))
|
||||
|
||||
interrupt.Restore(mask)
|
||||
}
|
||||
@@ -1,4 +1,4 @@
|
||||
//go:build tinygo.riscv32
|
||||
//go:build tinygo.riscv32 && !esp32c3
|
||||
|
||||
package ws2812
|
||||
|
||||
@@ -11,378 +11,6 @@ import "unsafe"
|
||||
/*
|
||||
#include <stdint.h>
|
||||
|
||||
__attribute__((always_inline))
|
||||
void ws2812_writeByte160(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {
|
||||
// Timings:
|
||||
// T0H: 56 - 58 cycles or 350.0ns - 362.5ns
|
||||
// T1H: 168 - 170 cycles or 1050.0ns - 1062.5ns
|
||||
// TLD: 184 - cycles or 1150.0ns -
|
||||
uint32_t value = (uint32_t)c << 23;
|
||||
char i = 8;
|
||||
__asm__ __volatile__(
|
||||
"1: // send_bit\n"
|
||||
"\t sw %[maskSet], %[portSet] // [1] T0H and T0L start here\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t slli %[value], %[value], 1 // [1] shift value left by 1\n"
|
||||
"\t bltz %[value], 2f // [1/3] skip_store\n"
|
||||
"\t sw %[maskClear], %[portClear] // [1] T0H -> T0L transition\n"
|
||||
"\t2: // skip_store\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t sw %[maskClear], %[portClear] // [1] T1H -> T1L transition\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t nop\n"
|
||||
"\t addi %[i], %[i], -1 // [1]\n"
|
||||
"\t bnez %[i], 1b // [1/3] send_bit\n"
|
||||
: [value]"+r"(value),
|
||||
[i]"+r"(i)
|
||||
: [maskSet]"r"(maskSet),
|
||||
[portSet]"m"(*portSet),
|
||||
[maskClear]"r"(maskClear),
|
||||
[portClear]"m"(*portClear));
|
||||
}
|
||||
|
||||
__attribute__((always_inline))
|
||||
void ws2812_writeByte320(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {
|
||||
// Timings:
|
||||
@@ -1109,16 +737,6 @@ void ws2812_writeByte320(char c, uint32_t *portSet, uint32_t *portClear, uint32_
|
||||
*/
|
||||
import "C"
|
||||
|
||||
func (d Device) writeByte160(c byte) {
|
||||
portSet, maskSet := d.Pin.PortMaskSet()
|
||||
portClear, maskClear := d.Pin.PortMaskClear()
|
||||
|
||||
mask := interrupt.Disable()
|
||||
C.ws2812_writeByte160(C.char(c), (*C.uint32_t)(unsafe.Pointer(portSet)), (*C.uint32_t)(unsafe.Pointer(portClear)), C.uint32_t(maskSet), C.uint32_t(maskClear))
|
||||
|
||||
interrupt.Restore(mask)
|
||||
}
|
||||
|
||||
func (d Device) writeByte320(c byte) {
|
||||
portSet, maskSet := d.Pin.PortMaskSet()
|
||||
portClear, maskClear := d.Pin.PortMaskClear()
|
||||
|
||||
+2
-1
@@ -5,7 +5,8 @@
|
||||
package ws2812 // import "tinygo.org/x/drivers/ws2812"
|
||||
|
||||
//go:generate go run gen-ws2812.go -arch=cortexm 16 48 64 120 125 150 160 168 200
|
||||
//go:generate go run gen-ws2812.go -arch=tinygoriscv 160 320
|
||||
//go:generate go run gen-ws2812.go -arch=tinygoriscv 320
|
||||
//go:generate go run gen-ws2812.go -arch=esp32c3 160
|
||||
|
||||
import (
|
||||
"errors"
|
||||
|
||||
@@ -0,0 +1,16 @@
|
||||
//go:build esp32c3
|
||||
|
||||
package ws2812
|
||||
|
||||
import "machine"
|
||||
|
||||
// Send a single byte using the WS2812 protocol.
|
||||
func (d Device) WriteByte(c byte) error {
|
||||
switch machine.CPUFrequency() {
|
||||
case 160_000_000: // 160MHz
|
||||
d.writeByte160(c)
|
||||
return nil
|
||||
default:
|
||||
return errUnknownClockSpeed
|
||||
}
|
||||
}
|
||||
@@ -1,4 +1,4 @@
|
||||
//go:build tinygo.riscv32
|
||||
//go:build tinygo.riscv32 && !esp32c3
|
||||
|
||||
package ws2812
|
||||
|
||||
@@ -7,9 +7,6 @@ import "machine"
|
||||
// Send a single byte using the WS2812 protocol.
|
||||
func (d Device) WriteByte(c byte) error {
|
||||
switch machine.CPUFrequency() {
|
||||
case 160_000_000: // 160MHz, e.g. esp32c3
|
||||
d.writeByte160(c)
|
||||
return nil
|
||||
case 320_000_000: // 320MHz, e.g. fe310
|
||||
d.writeByte320(c)
|
||||
return nil
|
||||
|
||||
Reference in New Issue
Block a user