1 /*
2 * Author: Brendan Le Foll
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
27 #include "mraa.hpp"
28
29 static volatile int counter = 0;
30 static volatile int oldcounter = 0;
31
32 void
interrupt(void * args)33 interrupt(void* args)
34 {
35 ++counter;
36 }
37
38 int
main()39 main()
40 {
41 mraa::Gpio* x = new mraa::Gpio(6);
42
43 x->dir(mraa::DIR_IN);
44
45 x->isr(mraa::EDGE_BOTH, &interrupt, NULL);
46
47 for (;;) {
48 if (counter != oldcounter) {
49 fprintf(stdout, "timeout counter == %d\n", counter);
50 oldcounter = counter;
51 }
52 // got to relieve our poor CPU!
53 sleep(1);
54 }
55
56 return EXIT_SUCCESS;
57 }
58