72 lines
1.5 KiB
JavaScript
72 lines
1.5 KiB
JavaScript
const SerialPort = require('serialport');
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const ENTTEC_PRO_DMX_STARTCODE = 0x00;
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const ENTTEC_PRO_START_OF_MSG = 0x7e;
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const ENTTEC_PRO_END_OF_MSG = 0xe7;
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const ENTTEC_PRO_SEND_DMX_RQ = 0x06;
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// var ENTTEC_PRO_RECV_DMX_PKT = 0x05;
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function EnttecUSBDMXPRO(deviceId, options = {}) {
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const self = this;
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this.universe = Buffer.alloc(513, 0);
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this.dev = new SerialPort(deviceId, {
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'baudRate': 250000,
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'dataBits': 8,
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'stopBits': 2,
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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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}
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EnttecUSBDMXPRO.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 hdr = Buffer.from([
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ENTTEC_PRO_START_OF_MSG,
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ENTTEC_PRO_SEND_DMX_RQ,
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(this.universe.length) & 0xff,
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((this.universe.length) >> 8) & 0xff,
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ENTTEC_PRO_DMX_STARTCODE,
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]);
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const msg = Buffer.concat([
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hdr,
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this.universe.slice(1),
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Buffer.from([ENTTEC_PRO_END_OF_MSG]),
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]);
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this.dev.write(msg);
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};
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EnttecUSBDMXPRO.prototype.start = () => { };
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EnttecUSBDMXPRO.prototype.stop = () => { };
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EnttecUSBDMXPRO.prototype.close = function (cb) {
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this.dev.close(cb);
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};
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EnttecUSBDMXPRO.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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EnttecUSBDMXPRO.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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EnttecUSBDMXPRO.prototype.get = function (c) {
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return this.universe[c];
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};
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module.exports = EnttecUSBDMXPRO;
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