/*
 * @brief Pin Interrupt example
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2013
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#include "board.h"
#include "chip.h"
#include <stdio.h>

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

#if defined(BOARD_NXP_LPCXPRESSO_1549)
/* GPIO pin for PININT interrupt.  This is SW1-WAKE button switch input. */
#define TEST_INPUT_PIN          17	/* GPIO pin number mapped to PININT */
#define TEST_INPUT_PORT         0	/* GPIO port number mapped to PININT */
#define TEST_INPUT_PIN_PORT     0
#define TEST_INPUT_PIN_BIT      17
#define PININT_INDEX   0	/* PININT index used for GPIO mapping */
#define PININT_IRQ_HANDLER  PIN_INT0_IRQHandler	/* GPIO interrupt IRQ function name */
#define PININT_NVIC_NAME    PIN_INT0_IRQn	/* GPIO interrupt NVIC interrupt name */

#else
#error "PININT Interrupt not configured for this example"
#endif /* defined(BOARD_NXP_LPCXPRESSO_1549) */

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Private functions
 ****************************************************************************/

/*****************************************************************************
 * Public functions
 ****************************************************************************/

/**
 * @brief	Handle interrupt from GPIO pin or GPIO pin mapped to PININT
 * @return	Nothing
 */
void PININT_IRQ_HANDLER(void)
{
	Chip_PININT_ClearIntStatus(LPC_GPIO_PIN_INT, PININTCH(PININT_INDEX));
	Board_LED_Toggle(0);
}

/**
 * @brief	Main program body
 * @return	Does not return
 */
int main(void)
{
	SystemCoreClockUpdate();
	Board_Init();
	Board_LED_Set(0, false);

	/* Initialize PININT driver */
	Chip_PININT_Init(LPC_GPIO_PIN_INT);

	/* Set pin back to GPIO (on some boards may have been changed to something
	   else by Board_Init()) */
	Chip_IOCON_PinMuxSet(LPC_IOCON, TEST_INPUT_PIN_PORT, TEST_INPUT_PIN_BIT,
						 (IOCON_DIGMODE_EN | IOCON_MODE_INACT) );

	/* Configure GPIO pin as input */
	Chip_GPIO_SetPinDIRInput(LPC_GPIO, TEST_INPUT_PORT, TEST_INPUT_PIN);

	/* Enable PININT clock */
	Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PININT);

	/* Reset the PININT block */
	Chip_SYSCTL_PeriphReset(RESET_PININT);

	/* Configure interrupt channel for the GPIO pin in INMUX block */
	Chip_INMUX_PinIntSel(PININT_INDEX, TEST_INPUT_PORT, TEST_INPUT_PIN);

	/* Configure channel interrupt as edge sensitive and falling edge interrupt */
	Chip_PININT_ClearIntStatus(LPC_GPIO_PIN_INT, PININTCH(PININT_INDEX));
	Chip_PININT_SetPinModeEdge(LPC_GPIO_PIN_INT, PININTCH(PININT_INDEX));
	Chip_PININT_EnableIntLow(LPC_GPIO_PIN_INT, PININTCH(PININT_INDEX));

	/* Enable interrupt in the NVIC */
	NVIC_ClearPendingIRQ(PININT_NVIC_NAME);
	NVIC_EnableIRQ(PININT_NVIC_NAME);

	/* Spin in a loop here.  All the work is done in ISR. */
	while (1) {}

	return 0;
}