1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3
4/*
5* Author: Jon Trulson <jtrulson@ics.com>
6* Copyright (c) 2015 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
28var digitalAccelerometer = require('jsupm_h3lis331dl');
29
30// Instantiate an H3LIS331DL on I2C bus 0
31var myDigitalAccelerometer = new digitalAccelerometer.H3LIS331DL(
32    digitalAccelerometer.H3LIS331DL_I2C_BUS,
33    digitalAccelerometer.H3LIS331DL_DEFAULT_I2C_ADDR);
34
35// Initialize the device with default values
36myDigitalAccelerometer.init();
37
38var x, y, z;
39x = digitalAccelerometer.new_intp();
40y = digitalAccelerometer.new_intp();
41z = digitalAccelerometer.new_intp();
42
43var ax, ay, az;
44ax = digitalAccelerometer.new_floatp();
45ay = digitalAccelerometer.new_floatp();
46az = digitalAccelerometer.new_floatp();
47
48var outputStr;
49
50var myInterval = setInterval(function()
51{
52	myDigitalAccelerometer.update();
53	myDigitalAccelerometer.getRawXYZ(x, y, z);
54	outputStr = "Raw: X = " + digitalAccelerometer.intp_value(x) +
55	" Y = " + digitalAccelerometer.intp_value(y) +
56	" Z = " + digitalAccelerometer.intp_value(z);
57	console.log(outputStr);
58
59	myDigitalAccelerometer.getAcceleration(ax, ay, az);
60	outputStr = "Acceleration: AX = "
61		+ roundNum(digitalAccelerometer.floatp_value(ax), 6)
62		+ " AY = " + roundNum(digitalAccelerometer.floatp_value(ay), 6)
63		+ " AZ = " + roundNum(digitalAccelerometer.floatp_value(az), 6);
64	console.log(outputStr);
65}, 500);
66
67// round off output to match C example, which has 6 decimal places
68function roundNum(num, decimalPlaces)
69{
70	var extraNum = (1 / (Math.pow(10, decimalPlaces) * 1000));
71	return (Math.round((num + extraNum)
72		* (Math.pow(10, decimalPlaces))) / Math.pow(10, decimalPlaces));
73}
74
75// When exiting: clear interval and print message
76process.on('SIGINT', function()
77{
78	clearInterval(myInterval);
79
80	// clean up memory
81	digitalAccelerometer.delete_intp(x);
82	digitalAccelerometer.delete_intp(y);
83	digitalAccelerometer.delete_intp(z);
84
85	digitalAccelerometer.delete_floatp(ax);
86	digitalAccelerometer.delete_floatp(ay);
87	digitalAccelerometer.delete_floatp(az);
88
89	console.log("Exiting...");
90	process.exit(0);
91});
92