ws2812: support the Teensy 3.6

examples/ws2812/others.go

@@ -1,4 +1,4 @@
-//go:build !digispark && !arduino && !arduino_uno && !xiao_esp32c3
+//go:build !digispark && !arduino && !arduino_uno && !xiao_esp32c3 && !teensy36
 
 package main
 

examples/ws2812/teensy36.go

@@ -0,0 +1,10 @@
+//go:build teensy36
+
+package main
+
+import "machine"
+
+func init() {
+	// The Teensy 3.6 has no onboard LEDs, so drive an external strip.
+	neo = machine.D02
+}

smoketest.sh

@@ -109,6 +109,7 @@ tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples
 tinygo build -size short -o ./build/test.hex -target=arduino   ./examples/ws2812
 tinygo build -size short -o ./build/test.hex -target=digispark ./examples/ws2812
 tinygo build -size short -o ./build/test.bin -target=xiao-esp32c3 ./examples/ws2812
+tinygo build -size short -o ./build/test.hex -target=teensy36 ./examples/ws2812
 tinygo build -size short -o ./build/test.hex -target=arduino      ./examples/ws2812/neopixel-shield
 tinygo build -size short -o ./build/test.hex -target=arduino-zero ./examples/ws2812/neopixel-shield
 tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bme280/main.go

ws2812/doc.go

@@ -4,6 +4,6 @@
 // On RP2040/RP2350 it uses PIO for hardware-timed control.
 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=cortexm 16 48 64 120 125 150 160 168 180 200
 //go:generate go run gen-ws2812.go -arch=tinygoriscv 320
 //go:generate go run gen-ws2812.go -arch=esp32c3 160

ws2812/gen-ws2812.go

@@ -291,8 +291,12 @@ func writeGoWrapper(f *os.File, arch string, megahertz int) error {
 	buf := &bytes.Buffer{}
 	fmt.Fprintf(buf, "\n")
 	fmt.Fprintf(buf, "func (d Device) writeByte%d(c byte) {\n", megahertz)
-	fmt.Fprintf(buf, "	portSet, maskSet := d.Pin.PortMaskSet()\n")
-	fmt.Fprintf(buf, "	portClear, maskClear := d.Pin.PortMaskClear()\n")
+	if arch == "cortexm" {
+		fmt.Fprintf(buf, "	portSet, maskSet, portClear, maskClear := d.portMasks()\n")
+	} else {
+		fmt.Fprintf(buf, "	portSet, maskSet := d.Pin.PortMaskSet()\n")
+		fmt.Fprintf(buf, "	portClear, maskClear := d.Pin.PortMaskClear()\n")
+	}
 	fmt.Fprintf(buf, "\n")
 	fmt.Fprintf(buf, "	mask := interrupt.Disable()\n")
 	fmt.Fprintf(buf, "	C.ws2812_writeByte%d(C.char(c), (*C.uint32_t)(unsafe.Pointer(portSet)), (*C.uint32_t)(unsafe.Pointer(portClear)), C.uint32_t(maskSet), C.uint32_t(maskClear))\n", megahertz)