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119 lines
2.2 KiB
Go
119 lines
2.2 KiB
Go
// Copyright 2025 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 hd44780
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import (
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"errors"
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"testing"
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"time"
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periphDisplay "periph.io/x/conn/v3/display"
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"periph.io/x/conn/v3/display/displaytest"
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"periph.io/x/conn/v3/i2c/i2ctest"
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)
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func getLCD(t *testing.T, recordingName string) (*HD44780, error) {
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bus := &i2ctest.Playback{Ops: recordingData[recordingName], DontPanic: true}
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dev, err := NewAdafruitI2CBackpack(bus, 0x20, 2, 16)
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if err != nil {
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t.Fatal(err)
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}
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return dev, err
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}
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const (
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testRows = 2
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testCols = 16
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)
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var liveDevice = false
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func TestBasic(t *testing.T) {
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display, err := getLCD(t, "TestBasic")
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if err != nil {
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t.Fatal(err)
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}
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s := display.String()
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t.Log(s)
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if len(s) == 0 {
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t.Error("display.String()")
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}
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_, err = display.WriteString("1234567890")
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if err != nil {
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t.Error(err)
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}
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err = display.MoveTo(2, 2)
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if err != nil {
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t.Error(err)
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}
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_, err = display.WriteString("2345678901")
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if err != nil {
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t.Error(err)
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}
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rows := display.Rows()
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if rows != testRows {
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t.Errorf("display.Rows() expected %d, received %d", testRows, rows)
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}
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cols := display.Cols()
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if cols != testCols {
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t.Errorf("display.Cols() expected %d, received %d", testCols, cols)
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}
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if liveDevice {
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time.Sleep(5 * time.Second)
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}
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err = display.Halt()
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if err != nil {
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t.Error(err)
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}
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}
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func TestInterface(t *testing.T) {
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display, err := getLCD(t, "TestInterface")
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if err != nil {
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t.Fatal(err)
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}
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defer func() { _ = display.Halt() }()
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errs := displaytest.TestTextDisplay(display, liveDevice)
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for _, err := range errs {
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if !errors.Is(err, periphDisplay.ErrNotImplemented) {
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t.Error(err)
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}
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}
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if liveDevice {
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time.Sleep(5 * time.Second)
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}
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}
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func TestBacklights(t *testing.T) {
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display, err := getLCD(t, "TestBacklights")
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if err != nil {
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t.Fatal(err)
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}
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t.Cleanup(func() {
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_ = display.Halt()
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})
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err = display.Backlight(0)
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if err != nil {
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t.Error(err)
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}
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err = display.Backlight(0xff)
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if err != nil {
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t.Error(err)
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}
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for ix := range 3 {
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colors := make([]periphDisplay.Intensity, 3)
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colors[ix] = 0xff
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err = display.RGBBacklight(colors[0], colors[1], colors[2])
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if err != nil {
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t.Error(err)
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}
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}
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}
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