105 lines
2.6 KiB
JavaScript
105 lines
2.6 KiB
JavaScript
var events = require('events'),
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child = require('child_process'),
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util = require('util'),
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serial = require("serialport");
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var Arduino = function (debug, baudrate) {
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this.baudrate = baudrate && baudrate || 9600;
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this.debug = debug && debug || false;
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this.writeBuffer = [];
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}
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util.inherits(Arduino, events.EventEmitter);
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Arduino.prototype.HIGH = '255';
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Arduino.prototype.LOW = '000';
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Arduino.prototype.setup = function () {
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var self = this;
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child.exec('cd ../arduino && ino build && ino upload', function(err, stdout, stderr){
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if(err){
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console.log('Please install the ino utility and connect arduino!\nIf there are other open programs that communicate with the arduino, close them!');
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if(self.debug) {console.log(err.message);}
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return;
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}
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var buff = stdout.slice(stdout.indexOf('Guessing serial port ... ')+25);
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buff = buff.slice(0, buff.indexOf('\n'));
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console.log('Guessing serial port ... ' + buff);
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self.serial = new serial.SerialPort(buff, {
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baudrate: self.baudrate,
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parser: serial.parsers.readline('\n')
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}, false);
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self.serial.open(function (error) {
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if ( error ) {
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console.log('Please check arduino!');
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return;
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}
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});
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self.serial.on('open', function () { setTimeout(function () {
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self.serial.write(new Buffer('00000000'));
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self.serial.write(new Buffer('Zn000000', 'ascii'));
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if(self.debug) { self.serial.write(new Buffer('P0000000', 'ascii')); }
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self.emit('success');
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self.serial.on('data', function(data){
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if(self.debug) { console.log(data) };
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self.emit('data', data);
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});
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self.processWriteBuffer();
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}, 5000);});
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});
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}
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Arduino.prototype.write = function (message) {
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if (this.serial) {
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console.log('sending '+message);
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this.serial.write(message);
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} else {
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this.writeBuffer.push(message);
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console.log('Board isn\'t available (yet?).')
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}
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}
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Arduino.prototype.processWriteBuffer = function () {
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while (this.writeBuffer.length > 0) {
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this.write(this.writeBuffer.shift());
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}
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}
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// Helpers
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Arduino.prototype.valueToLastFour = function(val) {
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var encodedVal = "";
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for (var i = 3; i >= 0; i--) {
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encodedVal += String.fromCharCode(val/(Math.pow(2,8*i)));
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val = val % Math.pow(2,8*i);
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}
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return encodedVal;
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};
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Arduino.prototype.valueToFirstTwo = function(val) {
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var encodedVal = "";
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for (var i = 1; i >= 0; i--) {
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encodedVal += String.fromCharCode(val/(Math.pow(2,8*i)));
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val = val%Math.pow(2,8*i);
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}
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return encodedVal;
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};
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module.exports = Arduino;
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