Home | History | Annotate | Download | only in c++ 
      1 /*
      2  * Author: Jon Trulson <jtrulson (at) 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 
     34 void sig_handler(int signo)
     35 {
     36   if (signo == SIGINT)
     37     shouldRun = false;
     38 }
     39 
     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 
     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