1 /*
2  * Author: Jon Trulson <jtrulson@ics.com>
3  * Copyright (c) 2015 Intel Corporation.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be
14  * included in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 
25 #include <unistd.h>
26 #include <iostream>
27 #include <signal.h>
28 #include "cjq4435.h"
29 
30 using namespace std;
31 
32 int shouldRun = true;
33 
sig_handler(int signo)34 void sig_handler(int signo)
35 {
36   if (signo == SIGINT)
37     shouldRun = false;
38 }
39 
40 
main()41 int main ()
42 {
43   signal(SIGINT, sig_handler);
44 
45 //! [Interesting]
46   // Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
47   upm::CJQ4435* mosfet = new upm::CJQ4435(3);
48 
49   mosfet->setPeriodMS(10);
50   mosfet->enable(true);
51 
52   while (shouldRun)
53     {
54       // start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
55       for (float i=0.0; i <= 1.0; i+=0.1)
56         {
57           mosfet->setDutyCycle(i);
58           usleep(100000);
59         }
60       sleep(1);
61       // Now take it back down
62       // start with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
63       for (float i=1.0; i >= 0.0; i-=0.1)
64         {
65           mosfet->setDutyCycle(i);
66           usleep(100000);
67         }
68       sleep(1);
69     }
70 
71 //! [Interesting]
72 
73   cout << "Exiting..." << endl;
74 
75   delete mosfet;
76   return 0;
77 }
78