60 lines
No EOL
1.2 KiB
JavaScript
60 lines
No EOL
1.2 KiB
JavaScript
"use strict"
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var FTDI = require('ftdi')
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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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;
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function EnttecUSBDMXPRO(device_id, cb) {
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var self = this
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cb = cb || function() {}
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this.universe = new Buffer(512)
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this.universe.fill(0)
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this.dev = new FTDI.FtdiDevice(device_id)
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this.dev.open({
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'baudrate': 115200,
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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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cb(err, device_id)
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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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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 + 1) & 0xff,
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((this.universe.length + 1) >> 0) & 0xff,
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((this.universe.length + 1) >> 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,
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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.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.get = function(c) {
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return this.universe[c]
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}
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module.exports = EnttecUSBDMXPRO |