upm/examples/c/dfrec.c

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2016 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 "dfrec.h"
#include "upm_utilities.h"

bool shouldRun = true;

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

int main()
{
    signal(SIGINT, sig_handler);

    //! [Interesting]

    // Instantiate a DFRobot EC sensor on analog pin A0, with a ds18b20
    // temperature sensor connected to UART 0, and a device index (for
    // the ds1820b uart bus) of 0, and an analog reference voltage of
    // 5.0.
    dfrec_context sensor = dfrec_init(0, 0, 0, 5.0);

    if (!sensor)
    {
        printf("dfrec_init() failed.\n");
        return(1);
    }

    // Every 2 seconds, update and print values
    while (shouldRun)
    {
        dfrec_update(sensor);

        printf("EC = %f ms/cm\n", dfrec_get_ec(sensor));
        printf("Volts = %f, Temperature = %f C\n",
                dfrec_get_volts(sensor), dfrec_get_temperature(sensor));
        printf("\n");

        upm_delay(2);
    }

    //! [Interesting]

    printf("Exiting...\n");

    dfrec_close(sensor);

    return 0;
}