upm/examples/c/urm37-uart.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 "urm37.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 URM37 sensor on UART 0, with the reset pin on D2
    urm37_context sensor = urm37_init(0, 2, 0, 0, 0, false);

    if (!sensor)
    {
        printf("urm37_init() failed.\n");
        return(1);
    }

    // Every half a second, sample the URM37 and output the measured
    // distance in cm.

    while (shouldRun)
    {
        float distance, temperature;

        urm37_get_distance(sensor, &distance, 0);
        printf("Detected distance (cm): %f\n", distance);

        urm37_get_temperature(sensor, &temperature);
        printf("Temperature (C): %f\n\n", temperature);
        upm_delay_ms(500);
    }

    //! [Interesting]

    printf("Exiting\n");

    urm37_close(sensor);

    return 0;
}