[物联网] 树莓派Pico 点亮屏幕

// I2C Default pins on Raspberry Pico.
const (
	I2C0_SDA_PIN = GP4
	I2C0_SCL_PIN = GP5

	I2C1_SDA_PIN = GP2
	I2C1_SCL_PIN = GP3
)

mkdir display_demo && cd display_demo
go mod init display_demo

package main

import (
	"machine"

	"image/color"
	"time"

	"tinygo.org/x/drivers/ssd1306"
)

func main() {
	
	machine.I2C0.Configure(machine.I2CConfig{
		Frequency: machine.TWI_FREQ_400KHZ,
		SDA:       machine.I2C0_SDA_PIN,
		SCL:       machine.I2C0_SCL_PIN,
	})

	display := ssd1306.NewI2C(machine.I2C0)
	// 注意这里的宽高对应你的显示屏
	display.Configure(ssd1306.Config{
		Address: ssd1306.Address_128_32,
		Width:   128,
		Height:  32,
	})

	display.ClearDisplay()

	x := int16(0)
	y := int16(0)
	deltaX := int16(1)
	deltaY := int16(1)
	for {
		pixel := display.GetPixel(x, y)
		c := color.RGBA{255, 255, 255, 255}
		if pixel {
			c = color.RGBA{0, 0, 0, 255}
		}
		display.SetPixel(x, y, c)
		display.Display()

		x += deltaX
		y += deltaY

		if x == 0 || x == 127 {
			deltaX = -deltaX
		}

		if y == 0 || y == 31 {
			deltaY = -deltaY
		}
		time.Sleep(1 * time.Millisecond)
	}
}

# 更新依赖
go mod tidy
# 烧录代码
tinygo flash -target=pico

package main

import (
	"image/color"
	"machine"
	"time"
	"tinygo.org/x/drivers"
	"tinygo.org/x/drivers/ssd1306"
)

func main() {
	machine.I2C0.Configure(machine.I2CConfig{
		Frequency: machine.TWI_FREQ_400KHZ,
		SDA:       machine.I2C0_SDA_PIN,
		SCL:       machine.I2C0_SCL_PIN,
	})

	display := ssd1306.NewI2C(machine.I2C0)
	display.Configure(ssd1306.Config{
		Address: ssd1306.Address_128_32,
		Width:   128,
		Height:  32,
	})

	display.ClearDisplay()

	x, y := 25, 10
	for _, word := range wordData {
		displayText(&display, x, y, word)
		display.Display()
		// 每写一个字就 x 偏移 16 个点
		x += 16
		time.Sleep(time.Second)
	}

	time.Sleep(time.Hour)
}

var wordData = [][][]byte{
	{
		{0x08, 0x80, 0x08, 0x80, 0x08, 0x80, 0x11, 0xFE, 0x11, 0x02, 0x32, 0x04, 0x34, 0x20, 0x50, 0x20},
		{0x91, 0x28, 0x11, 0x24, 0x12, 0x24, 0x12, 0x22, 0x14, 0x22, 0x10, 0x20, 0x10, 0xA0, 0x10, 0x40}, /*"你",0*/
	},
	{

		{0x10, 0x00, 0x10, 0xFC, 0x10, 0x04, 0x10, 0x08, 0xFC, 0x10, 0x24, 0x20, 0x24, 0x20, 0x25, 0xFE},
		{0x24, 0x20, 0x48, 0x20, 0x28, 0x20, 0x10, 0x20, 0x28, 0x20, 0x44, 0x20, 0x84, 0xA0, 0x00, 0x40}, /*"好",0*/
	},
	{
		{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x20, 0x20, 0x40}, /*",",0*/

	},
	{
		{0x02, 0x20, 0x12, 0x20, 0x12, 0x20, 0x12, 0x20, 0x12, 0x20, 0xFF, 0xFE, 0x12, 0x20, 0x12, 0x20},
		{0x12, 0x20, 0x12, 0x20, 0x13, 0xE0, 0x10, 0x00, 0x10, 0x00, 0x10, 0x00, 0x1F, 0xFC, 0x00, 0x00}, /*"世",0*/
	},
	{
		{0x00, 0x00, 0x1F, 0xF0, 0x11, 0x10, 0x11, 0x10, 0x1F, 0xF0, 0x11, 0x10, 0x11, 0x10, 0x1F, 0xF0},
		{0x02, 0x80, 0x0C, 0x60, 0x34, 0x58, 0xC4, 0x46, 0x04, 0x40, 0x08, 0x40, 0x08, 0x40, 0x10, 0x40}, /*"界",0*/
	},
	{

		{0x00, 0x00, 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00}, /*"!",0*/
	},
}

var Key = [8]byte{
	0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01,
}

func displayText(display drivers.Displayer, x, y int, wordData [][]byte) {

	for _, line := range wordData {
		// 每次读取两个作为一行
		for i := 0; i < len(line); i += 2 {
			for j := 0; j < 2; j++ {

				val := line[i+j]
				for k := byte(0); k < 8; k++ {

					if val&Key[k] == Key[k] {
						pointX := int16(x + (j * 8) + int(k))
						pointY := int16(y)
						display.SetPixel(pointX, pointY, color.RGBA{
							R: 255,
							G: 255,
							B: 255,
							A: 255,
						})
					}
				}
			}

			y++
		}
	}

}

# 更新依赖
go mod tidy
# 烧录代码
tinygo flash -target=pico