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121 lines
2.3 KiB
Go
121 lines
2.3 KiB
Go
// Copyright 2020 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 st7567_test implements an example for the GFX HAT from Pimoroni
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//
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// Datasheet
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//
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// https://www.newhavendisplay.com/appnotes/datasheets/LCDs/ST7567.pdf
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package st7567_test
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import (
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"time"
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"periph.io/x/conn/v3/gpio/gpioreg"
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"periph.io/x/conn/v3/spi/spireg"
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"github.com/GermanBionicSystems/devices/v3/st7567"
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"periph.io/x/host/v3"
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)
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func Example() {
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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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conn, err := spireg.Open("SPI0.0")
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if err != nil {
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log.Fatal(err)
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}
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defer conn.Close()
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dc := gpioreg.ByName("6")
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reset := gpioreg.ByName("5")
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cs := gpioreg.ByName("8")
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o := &st7567.Opts{
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Bias: st7567.Bias17,
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CommonDirection: st7567.CommonDirReverse,
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SegmentDirection: st7567.SegmentDirNormal,
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Display: st7567.DisplayNormal,
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RegulationRatio: st7567.RegulationRatio{st7567.RegResistorRR0, st7567.RegResistorRR1},
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StartLine: 0,
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Contrast: 40,
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}
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dev, err := st7567.New(conn, dc, reset, cs, o)
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if err != nil {
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log.Fatal(err)
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}
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defer func() {
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fmt.Println("halting device")
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dev.Halt()
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}()
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//Control-C trap
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c := make(chan os.Signal)
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signal.Notify(c, os.Interrupt, syscall.SIGTERM)
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go func() {
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<-c
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fmt.Println("halting device")
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dev.Halt()
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os.Exit(1)
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}()
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for x := 0; x < st7567.Width; x++ {
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for y := 0; y < st7567.Height; y++ {
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dev.SetPixel(x, y, true)
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}
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if err = dev.Update(); err != nil {
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log.Fatal(err)
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}
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time.Sleep(40 * time.Millisecond)
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}
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for i := 0; i < 64; i++ {
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fmt.Printf("current contrast value: %d\n", i)
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if err = dev.SetContrast(byte(i)); err != nil {
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log.Fatal(err)
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}
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if err = dev.Update(); err != nil {
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log.Fatal(err)
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}
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time.Sleep(100 * time.Millisecond)
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}
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if err = dev.Update(); err != nil {
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log.Fatal(err)
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}
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fmt.Println("entering power save mode")
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time.Sleep(2 * time.Second)
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if err = dev.PowerSave(); err != nil {
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log.Fatal(err)
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}
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time.Sleep(2 * time.Second)
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fmt.Println("leaving power save mode")
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if err = dev.WakeUp(); err != nil {
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log.Fatal(err)
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}
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time.Sleep(2 * time.Second)
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}
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