1 /*
2 * Author: Jon Trulson <jtrulson@ics.com>
3 * Copyright (c) 2014 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 <signal.h>
27 #include <iostream>
28 #include "mpr121.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
printButtons(upm::MPR121 * touch)40 void printButtons(upm::MPR121 *touch)
41 {
42 bool buttonPressed = false;
43
44 cout << "Buttons Pressed: ";
45 for (int i=0; i<12; i++)
46 {
47 if (touch->m_buttonStates & (1 << i))
48 {
49 cout << i << " ";
50 buttonPressed = true;
51 }
52 }
53
54 if (!buttonPressed)
55 cout << "None";
56
57 if (touch->m_overCurrentFault)
58 cout << "Over Current Fault detected!" << endl;
59
60 cout << endl;
61 }
62
main(int argc,char ** argv)63 int main(int argc, char **argv)
64 {
65 signal(SIGINT, sig_handler);
66
67 //! [Interesting]
68 // Instantiate an MPR121 on I2C bus 0
69
70 upm::MPR121 *touch = new upm::MPR121(MPR121_I2C_BUS, MPR121_DEFAULT_I2C_ADDR);
71
72 // init according to AN3944 defaults
73 touch->configAN3944();
74
75 while (shouldRun)
76 {
77 touch->readButtons();
78 printButtons(touch);
79 sleep(1);
80 }
81
82 //! [Interesting]
83
84 cout << "Exiting..." << endl;
85
86 delete touch;
87 return 0;
88 }
89