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54 lines
1.3 KiB
Go
54 lines
1.3 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 ssd1306_test
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import (
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"image"
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"log"
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"periph.io/x/conn/v3/i2c/i2creg"
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"periph.io/x/devices/v3/ssd1306"
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"periph.io/x/devices/v3/ssd1306/image1bit"
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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 i2creg I²C bus registry to find the first available I²C bus.
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b, err := i2creg.Open("")
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if err != nil {
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log.Fatal(err)
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}
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defer b.Close()
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dev, err := ssd1306.NewI2C(b, &ssd1306.DefaultOpts)
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if err != nil {
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log.Fatalf("failed to initialize ssd1306: %v", err)
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}
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// Draw on it.
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img := image1bit.NewVerticalLSB(dev.Bounds())
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// Note: this code is commented out so periph does not depend on:
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// "golang.org/x/image/font"
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// "golang.org/x/image/font/basicfont"
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// "golang.org/x/image/math/fixed"
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//
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// f := basicfont.Face7x13
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// drawer := font.Drawer{
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// Dst: img,
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// Src: &image.Uniform{image1bit.On},
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// Face: f,
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// Dot: fixed.P(0, img.Bounds().Dy()-1-f.Descent),
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// }
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// drawer.DrawString("Hello from periph!")
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if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
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log.Fatal(err)
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}
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}
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