mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-10 09:53:42 +00:00
Yurii Soldak
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package main
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// Example program for the ST7735 display (Waveshare 1.44" LCD HAT) using the rpio driver on a Raspberry Pi.
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import (
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"fmt"
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"image/color"
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"time"
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go_rpio "github.com/stianeikeland/go-rpio/v4"
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"tinygo.org/x/drivers/rpio"
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"tinygo.org/x/drivers/st7735"
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)
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var (
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black = color.RGBA{0, 0, 0, 255}
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colors = [...]color.RGBA{
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{255, 0, 0, 255}, // red
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{0, 255, 0, 255}, // green
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{0, 0, 255, 255}, // blue
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{255, 255, 0, 255}, // yellow
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}
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)
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func main() {
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if err := go_rpio.Open(); err != nil {
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fmt.Println("Error opening GPIO:", err)
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return
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}
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defer go_rpio.Close()
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// Initialize SPI and pins
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spi := rpio.NewSPI()
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resetPin := rpio.NewPin(27)
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dcPin := rpio.NewPin(25)
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csPin := rpio.NewPin(8)
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blPin := rpio.NewPin(24)
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// Initialize display
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device := st7735.New(spi, resetPin, dcPin, csPin, blPin)
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device.Configure(st7735.Config{
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Width: 128,
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Height: 128,
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Model: st7735.GREENTAB,
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RowOffset: 3,
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ColumnOffset: 2,
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})
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device.InvertColors(false)
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device.EnableBacklight(true)
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device.IsBGR(true) // no effect w/o rotation!
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device.SetRotation(st7735.NO_ROTATION)
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width, height := device.Size()
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// Clear display
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device.FillScreen(black)
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// Draw rectangles in a loop, clockwise rotation of colors
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pos := 0
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for {
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device.FillRectangle(0, 0, width/2, height/2, colors[(pos+0)%len(colors)]) // top left
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device.FillRectangle(0, height/2, width/2, height/2, colors[(pos+1)%len(colors)]) // bottom left
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device.FillRectangle(width/2, height/2, width/2, height/2, colors[(pos+2)%len(colors)]) // bottom right
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device.FillRectangle(width/2, 0, width/2, height/2, colors[(pos+3)%len(colors)]) // top right
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pos++
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time.Sleep(1 * time.Second)
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}
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}
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