TinyGo support for SSD1306

[ohchloeho]

I have tested both an Arduino Nano and ESP32 module with the SSD1306 OLED module while using the Go machine package with the tinygo SSD1306 driver ("tinygo.org/x/drivers/ssd1306"). It seems no matter how I flash TinyGo code to the modules the SSD1306 will not work. I'm certain this is a configuration issue as I'm able to flash LEDs and button controls to the pins. Please let me know if there's a resolution on this that I'm missing out on.

For reference, this is my code to print "Hello world!" on the OLED screen:

package main

import (
	"time"

	"github.com/tinygo-org/tinygo/src/machine"
	"tinygo.org/x/drivers/ssd1306"
)

func main() {
	// Initialize I2C
	machine.I2C0.Configure(machine.I2CConfig{
		SCL: machine.IO22, 
		SDA: machine.IO21, 
	})

	// Initialize the SSD1306 display
	display := ssd1306.NewI2C(machine.I2C0)
	display.Configure(ssd1306.Config{
		Width:  128,
		Height: 64,
	})

	display.ClearBuffer()
	drawText(&display, 0, 0, "Hello World!")

	display.Display()

	for {
		time.Sleep(time.Second)
	}
}

func drawText(display *ssd1306.Device, x int16, y int16, text string) {
	for i := int16(0); i < int16(len(text)); i++ {
		display.SetPixel(x+i*6, y, 1) // Basic "dot" rendering for each character
	}
}

This is the error message I get:

# github.com/tinygo-org/tinygo/src/machine
../../../../../go/pkg/mod/github.com/tinygo-org/[email protected]/src/machine/machine_esp32_i2c.go:38:16: undefined: SCL_PIN
../../../../../go/pkg/mod/github.com/tinygo-org/[email protected]/src/machine/machine_esp32_i2c.go:41:16: undefined: SDA_PIN

[aykevl]

For the ESP32 you need to specify a board, not just -target=esp32.

I don't know what's up with the Arduino Nano, does it produce the same error message?