oled-rpi-i2c-bus-async/tests/update.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);

		let p = 0,
			s = 0;
		await oled.drawPageSeg(p, s, 0xff, true);
		await oled.update();

		setInterval(async () => {
			await oled.drawPageSeg(p, s, 0x00, false);
			if (s + 1 >= WIDTH) {
				p = (p + 1) % 8;
			}
			s = (s + 1) % WIDTH;
			await oled.drawPageSeg(p, s, 0xff, true);
			await oled.update();
		}, 10);
	} catch (err) {
		console.log(err.message);
		process.exit(1);
	}
};

initializeDisplay();