peripheral/libupm/examples/c++/adc121c021.cxx

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2014 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <unistd.h>
#include <signal.h>
#include <iostream>
#include "adc121c021.h"

using namespace std;

int shouldRun = true;

void sig_handler(int signo)
{
  if (signo == SIGINT)
    shouldRun = false;
}

int main(int argc, char **argv)
{
  signal(SIGINT, sig_handler);

//! [Interesting]
  // Instantiate an ADC121C021 on I2C bus 0

  upm::ADC121C021 *adc = new upm::ADC121C021(ADC121C021_I2C_BUS, 
                                             ADC121C021_DEFAULT_I2C_ADDR);

  // An analog sensor, such as a Grove light sensor,
  // must be attached to the adc 
  // Prints the value and corresponding voltage every 50 milliseconds
  while (shouldRun)
    {
      uint16_t val = adc->value();
      cout << "ADC value: " << val << " Volts = " 
           << adc->valueToVolts(val) << endl;
      usleep(50000);
    }
//! [Interesting]

  cout << "Exiting..." << endl;

  delete adc;
  return 0;
}