* Author: Jessica Gomez <[email protected]>
 * Copyright (c) 2015 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, dfrobot 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.
 */

/**
 * @file
 * @ingroup basic
 * @brief On board LED blink C++
 *
 * Blink the on board LED by writing a digital value to an output pin
 * using the IO mraa library.
 *
 * @date 29/09/2015
 */

#include "mraa.hpp"

#include <iostream>
#include <unistd.h>

/*
 * On board LED blink C++ example
 *
 * Demonstrate how to blink the on board LED, writing a digital value to an
 * output pin using the MRAA library.
 * No external hardware is needed.
 *
 * - digital out: on board LED
 *
 * Additional linker flags: none
 */

int main()
{
   // select onboard LED pin based on the platform type
   // create a GPIO object from MRAA using it
   mraa::Platform platform = mraa::getPlatformType();
   mraa::Gpio* d_pin = NULL;
   switch (platform) {
      case mraa::INTEL_GALILEO_GEN1:
         d_pin = new mraa::Gpio(3, true, true);
         break;
      case mraa::INTEL_GALILEO_GEN2:
         d_pin = new mraa::Gpio(13, true, false);
         break;
      case mraa::INTEL_EDISON_FAB_C:
         d_pin = new mraa::Gpio(13, true, false);
         break;
      default:
         std::cerr << "Unsupported platform, exiting" << std::endl;
         return mraa::ERROR_INVALID_PLATFORM;
   }
   if (d_pin == NULL) {
      std::cerr << "Can't create mraa::Gpio object, exiting" << std::endl;
      return mraa::ERROR_UNSPECIFIED;
   }

   // set the pin as output
   if (d_pin->dir(mraa::DIR_OUT) != mraa::SUCCESS) {
      std::cerr << "Can't set digital pin as output, exiting" << std::endl;
      return MRAA_ERROR_UNSPECIFIED;
   }

   // loop forever toggling the on board LED every second
   for (;;) {
      d_pin->write(1);
      sleep(1);
      d_pin->write(0);
      sleep(1);
   }

   return mraa::SUCCESS;
}