66 lines
1.3 KiB
JavaScript
66 lines
1.3 KiB
JavaScript
const SerialPort = require('serialport');
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const UNIVERSE_LEN = 512;
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function DMX4ALL(deviceId, options = {}) {
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const self = this;
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this.universe = new Buffer(UNIVERSE_LEN + 1);
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this.universe.fill(0);
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this.dev = new SerialPort(deviceId, {
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'baudRate': 38400,
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'dataBits': 8,
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'stopBits': 1,
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'parity': 'none',
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}, err => {
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if (!err) {
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self.sendUniverse();
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}
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});
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this.dev.on('data', data => {
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// process.stdout.write(data.toString('ascii'))
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});
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}
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DMX4ALL.prototype.sendUniverse = function () {
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if (!this.dev.writable) {
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return;
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}
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const msg = Buffer(UNIVERSE_LEN * 3);
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for (let i = 0; i < UNIVERSE_LEN; i++) {
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msg[i * 3 + 0] = (i < 256) ? 0xE2 : 0xE3;
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msg[i * 3 + 1] = i;
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msg[i * 3 + 2] = this.universe[i + 1];
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}
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this.dev.write(msg);
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};
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DMX4ALL.prototype.start = () => {};
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DMX4ALL.prototype.stop = () => {};
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DMX4ALL.prototype.close = function (cb) {
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this.dev.close(cb);
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};
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DMX4ALL.prototype.update = function (u) {
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for (const c in u) {
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this.universe[c] = u[c];
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}
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this.sendUniverse();
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};
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DMX4ALL.prototype.updateAll = function (v) {
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for (let i = 1; i <= 512; i++) {
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this.universe[i] = v;
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}
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this.sendUniverse();
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};
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DMX4ALL.prototype.get = function (c) {
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return this.universe[c];
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};
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module.exports = DMX4ALL;
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