68 lines
1.2 KiB
JavaScript
68 lines
1.2 KiB
JavaScript
"use strict"
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var SerialPort = require("serialport")
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var UNIVERSE_LEN = 512
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function DMX4ALL(device_id, options) {
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var self = this
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options = options || {}
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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(device_id, {
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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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}, function(err) {
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if(!err) {
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self.send_universe()
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}
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})
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this.dev.on('data', function(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.send_universe = function() {
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if(!this.dev.writable) {
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return
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}
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var msg = Buffer(UNIVERSE_LEN * 3)
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for(var 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 = function() {}
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DMX4ALL.prototype.stop = function() {}
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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(var c in u) {
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this.universe[c] = u[c]
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}
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this.send_universe()
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}
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DMX4ALL.prototype.updateAll = function(v){
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for(var i = 1; i <= 512; i++) {
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this.universe[i] = v
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}
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this.send_universe()
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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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