SSD1331

This library is a SSD1331 driver for Raspberry Pi 4.
See a Document at https://pkg.go.dev/github.com/BinaryDolphin29/SSD1331

Stable??

No...This library is Written by begginer.
So I can't take any responsibility.

Hardware

I use this OLED module https://akizukidenshi.com/catalog/g/gP-14435/, and Raspberry Pi 4(Raspbian Lite 32bit). I tested only these device.

Install

go get github.com/BinaryDolphin29/SSD1331

And you need to append 👇

spidev.bufsiz=65536

to the /boot/cmdline.txt.
It is raises the SPI buffer limit(Must be 16 bits or higher)

Example

GND -> GND
VCC -> 5V
SCL -> GPIO 11
SDA -> GPIO 10
RES -> GPIO 25
DC  -> GPIO 24
CS  -> GPIO 8

package main

import (
	"log"

	OLED "github.com/BinaryDolphin29/SSD1331"
	"periph.io/x/conn/v3/physic"
	"periph.io/x/host/v3/rpi"
)

type pattColor struct {
	R, G, B int
}

const max75 int = ((2<<7)*0.75) - 1

var testPattern = [6]pattColor{
	{max75, max75, max75}, // white
	{max75, max75, 0},     // yellow
	{0, max75, max75},     // cyan
	{0, max75, 0},         // green
	{max75, 0, max75},     // magenta
	{0, 0, max75},         // blue
}

func main() {
	display := &OLED.SSD1331{
		Name:      "/dev/spidev0.0",
		Frequency: 8 * physic.MegaHertz,
		ResetPin:  rpi.P1_22,
		DCPin:     rpi.P1_18,
	}

	if err := display.Init(); err != nil {
		log.Fatalln(err.Error())
	}

	width, height := display.Resolution()

	defer display.Close()
	display.ClearDisplay()

	var (
		rowSize = width / len(testPattern)
		maxX    = rowSize
		x       = 0
	)

	for _, c := range testPattern {
		for ; x < maxX; x++ {
			for y := 0; y < height; y++ {
				display.SetPixel(x, y, c.R, c.G, c.B)
			}
		}

		maxX += rowSize
	}

	display.Display()
}

This code in the example directry.

About Library used

periph.io/x/conn/v3/driver/driverreg  
periph.io/x/conn/v3/gpio  
periph.io/x/conn/v3/physic  
periph.io/x/conn/v3/spi  
periph.io/x/conn/v3/spi/spireg  
periph.io/x/host/v3

Thanks!
Library for more information periph.io and GitHub repository github.com/google/periph.

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