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<h1>src/module/IRRecv.js <small>File</small></h1>
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<pre class="prettyprint linenums">
+(function (global, factory) {
if (typeof exports === 'undefined') {
factory(global.webduino || {});
} else {
module.exports = factory;
}
}(this, function (scope) {
'use strict';
var Module = scope.Module,
BoardEvent = scope.BoardEvent,
proto;
var IRRecvEvent = {
/**
* Fires when receiving data.
*
* @event IRRecvEvent.MESSAGE
*/
MESSAGE: 'message',
/**
* Fires when error occured while receiving data.
*
* @event IRRecvEvent.MESSAGE_ERROR
*/
MESSAGE_ERROR: 'messageError'
};
/**
* The IRRecv Class.
*
* @namespace webduino.module
* @class IRRecv
* @constructor
* @param {webduino.Board} board The board that the IRLed is attached to.
* @param {Integer} pin The pin that the IRLed is connected to.
* @extends webduino.Module
*/
function IRRecv(board, pin) {
Module.call(this);
this._board = board;
this._pin = pin;
this._messageHandler = onMessage.bind(this);
this._recvCallback = function () {};
this._recvErrorCallback = function () {};
this._board.send([0xf0, 0x04, 0x0A, 0x01, 0xf7]);
}
function onMessage(event) {
var recvChk = [0x04, 0x10];
var msg = event.message;
var data = msg.slice(2);
var str = '';
var i, tp, len;
for (i = 0, len = recvChk.length; i < len; i++) {
if (recvChk[i] !== msg[i]) {
return false;
}
}
for (i = 0; i < data.length; i++) {
tp = String.fromCharCode(data[i]);
str += tp.toLowerCase();
}
if (str !== 'ffffffff') {
this.emit(IRRecvEvent.MESSAGE, str);
} else {
this.emit(IRRecvEvent.MESSAGE_ERROR, str, msg);
}
}
IRRecv.prototype = proto = Object.create(Module.prototype, {
constructor: {
value: IRRecv
},
/**
* The state indicating whether the IRLed is receiving.
*
* @attribute state
* @type {String} `on` or `off`
*/
state: {
get: function () {
return this._state;
},
set: function (val) {
this._state = val;
}
}
});
/**
* Start detection.
*
* @method receive
* @param {Function} [callback] Detection callback.
* @param {Function} [errorCallback] Error callback while Detection.
*/
/**
* Start detection.
*
* @method on
* @param {Function} [callback] Detection callback.
* @param {Function} [errorCallback] Error callback while Detection.
* @deprecated `on()` is deprecated, use `receive()` instead.
*/
proto.receive = proto.on = function (callback, errorCallback) {
var aryCode = [0xf0, 0x04, 0x0A, 0x00];
if (typeof callback !== 'function') {
callback = function () {};
}
if (typeof errorCallback !== 'function') {
errorCallback = function () {};
}
if (this._pin) {
aryCode.push(this._pin.number, 0xf7);
this._board.send(aryCode);
this._state = 'on';
this._recvCallback = function (value) {
callback(value);
};
this._recvErrorCallback = function (value, msg) {
errorCallback(value, msg);
};
this._board.on(BoardEvent.SYSEX_MESSAGE, this._messageHandler);
this.addListener(IRRecvEvent.MESSAGE, this._recvCallback);
this.addListener(IRRecvEvent.MESSAGE_ERROR, this._recvErrorCallback);
}
};
/**
* Stop detection.
*
* @method off
*/
proto.off = function () {
this._board.send([0xf0, 0x04, 0x0A, 0x01, 0xf7]);
this._state = 'off';
this._board.removeListener(BoardEvent.SYSEX_MESSAGE, this._messageHandler);
this.removeListener(IRRecvEvent.MESSAGE, this._recvCallback);
this.removeListener(IRRecvEvent.MESSAGE_ERROR, this._recvErrorCallback);
this._recvCallback = null;
this._recvErrorCallback = null;
};
scope.module.IRRecv = IRRecv;
}));
</pre>
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