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72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
// Copyright 2018 The Periph Authors. All rights reserved.
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// Use of this source code is governed under the Apache License, Version 2.0
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// that can be found in the LICENSE file.
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package apa102_test
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import (
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"image"
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"image/color"
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"log"
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"periph.io/x/conn/v3/spi/spireg"
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"github.com/GermanBionicSystems/devices/v3/apa102"
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"periph.io/x/host/v3"
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)
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func Example() {
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// Make sure periph is initialized.
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if _, err := host.Init(); err != nil {
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log.Fatal(err)
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}
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// Use spireg SPI port registry to find the first available SPI bus.
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p, err := spireg.Open("")
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if err != nil {
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log.Fatal(err)
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}
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defer p.Close()
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// Opens a 300 lights strip at 50% intensity with color temperature at
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// 3500°Kelvin.
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o := apa102.DefaultOpts
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o.NumPixels = 300
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o.Intensity = 127
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o.Temperature = 3500
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dev, err := apa102.New(p, &o)
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if err != nil {
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log.Fatalf("failed to open: %v", err)
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}
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img := image.NewNRGBA(image.Rect(0, 0, dev.Bounds().Dy(), 1))
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for x := 0; x < img.Rect.Max.X; x++ {
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img.SetNRGBA(x, 0, color.NRGBA{uint8(x), uint8(255 - x), 0, 255})
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}
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if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
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log.Fatalf("failed to draw: %v", err)
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}
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}
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func ExampleToRGB() {
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// Make sure periph is initialized.
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if _, err := host.Init(); err != nil {
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log.Fatal(err)
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}
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// Use spireg SPI port registry to find the first available SPI bus.
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p, err := spireg.Open("")
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if err != nil {
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log.Fatal(err)
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}
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defer p.Close()
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o := apa102.PassThruOpts
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o.NumPixels = 2
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dev, err := apa102.New(p, &o)
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if err != nil {
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log.Fatalf("failed to open: %v", err)
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}
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if _, err = dev.Write(apa102.ToRGB([]color.NRGBA{{R: 0xFF, G: 0xFF, B: 0xFF}, {R: 0x80, G: 0x80, B: 0x80}})); err != nil {
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log.Fatalf("failed to draw: %v", err)
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}
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}
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