airbourne/airbourne/examples/rc_ppm/main.cpp

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/*
 * Copyright (c) 2017, James Jackson
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* Includes */
#include "led.h"
#include "printf.h"
#include "rc_ppm.h"
#include "system.h"
#include "vcp.h"

VCP* uartPtr = NULL;

static void _putc(void* p, char c)
{
  (void)p; // avoid compiler warning about unused variable
  uartPtr->put_byte(c);
}

int main()
{
  systemInit();

  VCP vcp;
  vcp.init();
  uartPtr = &vcp;
  init_printf(NULL, _putc);

  LED warn;
  warn.init(LED1_GPIO, LED1_PIN);
  LED info;
  info.init(LED2_GPIO, LED2_PIN);

  RC_PPM rc;

  rc.init(&pwm_config[10]);

  while (1)
  {
    if (rc.lost())
    {
      info.off();
      warn.on();
      printf("rc lost\n");
    }
    else
    {
      warn.off();
      info.on();
      for (int i = 0; i < 8; i++)
      {
        float val = rc.read(i);
        printf("%d.%d\t", (int32_t)((1000 * val) / 1000), ((int32_t)(1000 * val) % 1000));
      }
      printf("\n");
    }
    delay(20);
  }
}