1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3
4/*
5* Author: Zion Orent <zorent@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 MOSFETsensor = require("jsupm_cjq4435");
29
30var g_addnumBool = true;
31var g_cycleNum = 0.0;
32var g_cycleCount = 0;
33
34// Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
35var myMOSFETsensor = new MOSFETsensor.CJQ4435(3);
36
37myMOSFETsensor.setPeriodMS(10);
38myMOSFETsensor.enable(true);
39
40// A note on timing:
41//	In the C++ example, the system sleeps 11 times for 100 milliseconds
42//	between each duty cycle. After reaching the last point of the cycle,
43//	the system sleeps again for 1 second.
44//	The sleeps are cumulative, so the system has slept for 2.1 seconds
45//	sum total for each cycle.
46//	setInterval and setTimeout make asynchronous function calls;
47//	they aren't cumulative.
48//	In order to approximate the behavior of the C++ example, we need
49//	to call each iteration 2.1 seconds apart instead of 1 second apart.
50
51var myInterval = setInterval(function()
52{
53	setDutyCycle();
54}, (1000 + (11*100)) );
55
56
57// We start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
58// Then we take it back down,
59// starting with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
60function setDutyCycle()
61{
62	myMOSFETsensor.setDutyCycle(g_cycleNum);
63	if (g_addnumBool)
64		g_cycleNum += 0.1;
65	else
66		g_cycleNum -= 0.1;
67	g_cycleCount++;
68	if (g_cycleCount > 10)
69	{
70		g_addnumBool = !g_addnumBool;
71		g_cycleCount = 0;
72	}
73	else
74		setTimeout(setDutyCycle, 100);
75}
76
77
78// When exiting: clear interval and print exit message
79process.on('SIGINT', function()
80{
81	clearInterval(myInterval);
82	myMOSFETsensor = null;
83	MOSFETsensor.cleanUp();
84	MOSFETsensor = null;
85	console.log("Exiting...");
86	process.exit(0);
87});
88