[IoT] Raspberry Pi Pico Lighting Up the Display

A craftsman must sharpen his tools to do his work well. First, let’s configure our development environment.
Refer to the official TinyGo IDE integration guide: https://tinygo.org/docs/guides/ide-integration/
Using GoLand 2021 as our IDE, follow these steps:

Install the TinyGo plugin: JetBrains Plugin Repository or search directly in File -> Settings -> Plugins
After installation, configure the board type at File -> Settings -> Go -> TinyGo (select “pico” in this case)
Restart GoLand 2021 to activate Pico-specific code completion

The display used in this project is a 0.96-inch OLED 128x32 module:

0.96-inch OLED Display
Wiring configuration based on Pico’s default I2C pins:

Raspberry Pi	Display	Note
3V3	VCC	Power supply
GND	GND	Ground
GP5	SCL	Clock line
GP4	SDA	Data line

After connecting the wires, verify the display resolution (128x32 in this case).
Initialize the project:

mkdir display_demo && cd display_demo
go mod init display_demo

Create main.go with the following code (adapted from TinyGo Drivers Example):

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

	display.ClearDisplay()

	x, y := int16(0), int16(0)
	deltaX, deltaY := int16(1), 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)
	}
}

Flash the code to Pico:

go mod tidy
tinygo flash -target=pico

Successful execution will show an animation:

Displaying Text

Using font generation tools (configuration shown below):

Font Generation Tool
Modified main.go for text display:

package main

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

// [...] (Keep the same display initialization code)

var wordData = [][][]byte{
	// Chinese character data arrays
	// (Maintain original byte arrays here)
}

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

func displayText(display drivers.Displayer, x, y int, wordData [][]byte) {
	// Pixel drawing implementation
	// (Maintain original pixel manipulation logic)
}

Flash the updated code:

go mod tidy
tinygo flash -target=pico

Final result showing text animation: