1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3/*global */
4/*
5* Author: Zion Orent <zorent@ics.com>
6* Copyright (c) 2014 Intel Corporation.
7*
8* Permission is hereby granted, free of charge, to any person obtaining
9* a copy of this software and associated documentation files (the
10* "Software"), to deal in the Software without restriction, including
11* without limitation the rights to use, copy, modify, merge, publish,
12* distribute, sublicense, and/or sell copies of the Software, and to
13* permit persons to whom the Software is furnished to do so, subject to
14* the following conditions:
15*
16* The above copyright notice and this permission notice shall be
17* included in all copies or substantial portions of the Software.
18*
19* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26*/
27
28// Load Compass module
29var hmc5883l = require('jsupm_hmc5883l');
30// load this on i2c
31var myCompass = new hmc5883l.Hmc5883l(0);
32// Set your declination from true north in radians
33myCompass.set_declination(0.2749);
34
35var coordsObj;
36// Print out the coordinates, heading, and direction every second
37setInterval(function()
38{
39	myCompass.update(); // Update the coordinates
40	coordsObj = myCompass.coordinates();
41	var coords = (coordsObj.getitem(0) + " ");
42	coords += (coordsObj.getitem(1) + " ");
43	coords += coordsObj.getitem(2);
44	var heading = round2Digits(myCompass.heading());
45	var direction = round2Digits(myCompass.direction());
46	var compassResults = "coords: " + coords +
47		"    heading: " + heading + " direction " + direction;
48	console.log(compassResults);
49}, 1000);
50
51function round2Digits(num)
52{
53	return Math.round((num  + 0.00001) * 100) / 100;
54}
55
56// Print message when exiting
57process.on('SIGINT', function()
58{
59	console.log("Exiting...");
60	process.exit(0);
61});
62