upm/examples/c/vk2828u7.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 "vk2828u7.h"

bool shouldRun = true;

const size_t bufferLength = 256;

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

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

//! [Interesting]

  // Instantiate a VK2828U7 sensor on uart 0 at 9600 baud with enable
  // pin on D3
  vk2828u7_context sensor = vk2828u7_init(0, 9600, 3);

  if (!sensor)
    {
      printf("vk2828u7_init() failed.\n");
      return 1;
    }

  char buffer[bufferLength];
  int rv = 0;

  // loop, dumping NMEA data out as fast as it comes in
  while (shouldRun && vk2828u7_data_available(sensor, 5000))
    {
      if ((rv = vk2828u7_read(sensor, buffer, bufferLength)) >= 0)
        {
          int i;
          for (i=0; i<rv; i++)
            printf("%c", buffer[i]);
        }
    }

  if (shouldRun)
    printf("Timed out\n");

//! [Interesting]

  printf("Exiting\n");

  vk2828u7_close(sensor);

  return 0;
}