76 lines
1.5 KiB
JavaScript
76 lines
1.5 KiB
JavaScript
"use strict"
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var SerialPort = require("serialport")
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var ENTTEC_PRO_DMX_STARTCODE = 0x00
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, ENTTEC_PRO_START_OF_MSG = 0x7e
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, ENTTEC_PRO_END_OF_MSG = 0xe7
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, ENTTEC_PRO_SEND_DMX_RQ = 0x06
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, ENTTEC_PRO_RECV_DMX_PKT = 0x05
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;
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function EnttecUSBDMXPRO(device_id, options) {
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var self = this
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options = options || {}
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this.universe = new Buffer(513)
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this.universe.fill(0)
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this.dev = new SerialPort(device_id, {
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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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}, 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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}
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EnttecUSBDMXPRO.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 hdr = Buffer([
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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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var msg = Buffer.concat([
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hdr,
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this.universe.slice(1),
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Buffer([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 = function() {}
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EnttecUSBDMXPRO.prototype.stop = function() {}
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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(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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EnttecUSBDMXPRO.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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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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