1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3/*
4* Author: Zion Orent <zorent@ics.com>
5* Copyright (c) 2014 Intel Corporation.
6*
7* Permission is hereby granted, free of charge, to any person obtaining
8* a copy of this software and associated documentation files (the
9* "Software"), to deal in the Software without restriction, including
10* without limitation the rights to use, copy, modify, merge, publish,
11* distribute, sublicense, and/or sell copies of the Software, and to
12* permit persons to whom the Software is furnished to do so, subject to
13* the following conditions:
14*
15* The above copyright notice and this permission notice shall be
16* included in all copies or substantial portions of the Software.
17*
18* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25*/
26// JavaScript file for GP2Y0A family of IR Proximity Sensors
27
28// analog voltage, usually 3.3 or 5.0
29var GP2Y0A_AREF = 5.0;
30var SAMPLES_PER_QUERY = 20;
31
32var IRProximity = require('jsupm_gp2y0a');
33
34// Note, for the Grove 80cm version of this sensor, due to the way it is wired,
35// you need to plug this into the A0 port, where it will use the available
36// A1 pin for data.
37// Instantiate a GP2Y0A on analog pin A1
38var myVolts = new IRProximity.GP2Y0A(1);
39
40// The higher the voltage (closer to AREF) the closer the object is.
41// NOTE: The measured voltage will probably not exceed 3.3 volts.
42// Every second, print the averaged voltage value
43// (averaged over 20 samples).
44var myInterval = setInterval(function()
45{
46	console.log("AREF: " + GP2Y0A_AREF +
47                ", Voltage value (higher means closer): " +
48                myVolts.value(GP2Y0A_AREF, SAMPLES_PER_QUERY));
49}, 1000);
50
51// Print message when exiting
52process.on('SIGINT', function()
53{
54	clearInterval(myInterval);
55	myVolts = null;
56	IRProximity.cleanUp();
57	IRProximity = null;
58	console.log("Exiting...");
59	process.exit(0);
60});
61