/*
 * Copyright (C) 2014 Infineon Technologies AG. All rights reserved.
 *
 * Infineon Technologies AG (Infineon) is supplying this software for use with
 * Infineon's microcontrollers.
 * This file can be freely distributed within development tools that are
 * supporting such microcontrollers.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 * INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 * OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 *
 */

/**
 * @file
 * @date 19 Nov, 2015
 * @version 1.0.2
 *
 * @brief XMC4500 Relax kit ERU external interrupt
 *
 * The user can switch on/off the LED2 (P1.0) by pressing BUTTON2 (P1.15)
 *
 * History <br>
 *
 * Version 1.0.0 Initial
 * Version 1.0.2 Use recommended .input_a instead of .input in button_event_generator_config
 *
 */


#include <xmc_gpio.h>
#include <xmc_eru.h>

#define LED2 P1_0
#define BUTTON2 P1_15

XMC_ERU_ETL_CONFIG_t button_event_generator_config =
{
  .input_a = ERU1_ETL1_INPUTA_P1_15,
  .source = XMC_ERU_ETL_SOURCE_A,
  .edge_detection = XMC_ERU_ETL_EDGE_DETECTION_FALLING,
  .status_flag_mode = XMC_ERU_ETL_STATUS_FLAG_MODE_HWCTRL,
  .enable_output_trigger = true,
  .output_trigger_channel = XMC_ERU_ETL_OUTPUT_TRIGGER_CHANNEL0
};

XMC_ERU_OGU_CONFIG_t button_event_detection_config =
{
  .service_request = XMC_ERU_OGU_SERVICE_REQUEST_ON_TRIGGER
};

void ERU1_0_IRQHandler(void)
{
  XMC_GPIO_ToggleOutput(LED2);
}

int main(void)
{

  XMC_ERU_ETL_Init(ERU1_ETL1, &button_event_generator_config);
  XMC_ERU_OGU_Init(ERU1_OGU0, &button_event_detection_config);

  XMC_GPIO_SetMode(LED2, XMC_GPIO_MODE_OUTPUT_PUSH_PULL);
  XMC_GPIO_SetMode(BUTTON2, XMC_GPIO_MODE_INPUT_TRISTATE);

  NVIC_SetPriority(ERU1_0_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 63, 0));
  NVIC_EnableIRQ(ERU1_0_IRQn);

  while(1)
  {
	/* Infinite loop */
  }
}