89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
// This example is intended to be used with the Adafruit Circuitplay Bluefruit board.
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// It allows you to control the color of the built-in NeoPixel LEDS while they animate
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// in a circular pattern.
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//
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package main
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import (
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"image/color"
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"machine"
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"time"
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"tinygo.org/x/bluetooth"
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"tinygo.org/x/drivers/ws2812"
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)
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var adapter = bluetooth.DefaultAdapter
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// TODO: use atomics to access this value.
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var ledColor = [3]byte{0xff, 0x00, 0x00} // start out with red
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var leds [10]color.RGBA
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var (
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serviceUUID = [16]byte{0xa0, 0xb4, 0x00, 0x01, 0x92, 0x6d, 0x4d, 0x61, 0x98, 0xdf, 0x8c, 0x5c, 0x62, 0xee, 0x53, 0xb3}
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charUUID = [16]byte{0xa0, 0xb4, 0x00, 0x02, 0x92, 0x6d, 0x4d, 0x61, 0x98, 0xdf, 0x8c, 0x5c, 0x62, 0xee, 0x53, 0xb3}
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)
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var neo machine.Pin = machine.NEOPIXELS
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var led machine.Pin = machine.LED
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func main() {
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println("starting")
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led.Configure(machine.PinConfig{Mode: machine.PinOutput})
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neo.Configure(machine.PinConfig{Mode: machine.PinOutput})
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ws := ws2812.New(neo)
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must("enable BLE stack", adapter.Enable())
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adv := adapter.DefaultAdvertisement()
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must("config adv", adv.Configure(bluetooth.AdvertisementOptions{
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LocalName: "TinyGo colors",
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}))
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must("start adv", adv.Start())
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var ledColorCharacteristic bluetooth.Characteristic
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must("add service", adapter.AddService(&bluetooth.Service{
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UUID: bluetooth.NewUUID(serviceUUID),
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Characteristics: []bluetooth.CharacteristicConfig{
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{
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Handle: &ledColorCharacteristic,
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UUID: bluetooth.NewUUID(charUUID),
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Value: ledColor[:],
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Flags: bluetooth.CharacteristicReadPermission | bluetooth.CharacteristicWritePermission,
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WriteEvent: func(client bluetooth.Connection, offset int, value []byte) {
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if offset != 0 || len(value) != 3 {
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return
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}
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ledColor[0] = value[0]
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ledColor[1] = value[1]
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ledColor[2] = value[2]
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},
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},
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},
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}))
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rg := false
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for {
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rg = !rg
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for i := range leds {
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rg = !rg
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if rg {
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leds[i] = color.RGBA{R: ledColor[0], G: ledColor[1], B: ledColor[2]}
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} else {
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leds[i] = color.RGBA{R: 0x00, G: 0x00, B: 0x00}
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}
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}
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ws.WriteColors(leds[:])
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led.Set(rg)
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time.Sleep(100 * time.Millisecond)
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}
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}
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func must(action string, err error) {
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if err != nil {
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panic("failed to " + action + ": " + err.Error())
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}
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}
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