oled-rpi-i2c-bus-async/tests/drawPixel.js

Asynchronous NodeJS module for controlling oled devices on the Raspbery Pi (including the SSD1306 and SH1106 OLED screens)

import i2c from 'i2c-bus';
import SSD1306 from '../oled.mjs';

const HEIGHT = 64;
const WIDTH = 128;
const opts = {
	width: WIDTH,
	height: HEIGHT,
	address: 0x3c,
	bus: 3,
	driver: 'SH1106',
};

const initializeDisplay = async () => {
	try {
		const i2cBus = await i2c.openPromisified(opts.bus || 3);
		const oled = new SSD1306(i2cBus, opts);

		await oled.clearDisplay(true);
		await oled.drawPixel(
			[
				[0, 0, 1],
				[WIDTH - 1, 0, 1],
				[0, HEIGHT - 1, 1],
				[WIDTH - 1, HEIGHT - 1, 1],
			],
			true
		);

		setTimeout(async () => {
			await oled.clearDisplay(true);
		}, 4000);

		setTimeout(async () => {
			let x = 0,
				y = 0;
			await oled.drawPixel([x, y, 1], true);
			setInterval(async () => {
				await oled.drawPixel([x, y, 0], false);
				if ((x + 1) % WIDTH === 0) {
					y = (y + 1) % HEIGHT;
				}
				x = (x + 1) % WIDTH;
				await oled.drawPixel([x, y, 1], true);
			}, 10);
		}, 5000);
	} catch (err) {
		console.log(err.message);
		process.exit(1);
	}
};

initializeDisplay();