/*
 * @brief Blinky example using timers and sysTick
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * 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 <stdio.h>

/** @defgroup EXAMPLES_PERIPH_13XX_BLINKY LPC13xx Simple blinky example
 * @ingroup EXAMPLES_PERIPH_13XX
 * <b>Example description</b><br>
 * The Blinky example is known as the "Hello, World!" of embedded programming. This
 * example is a slight variation of the blinky theme in that the sysTick
 * interrupt turns on the LED at 10Hz, while timer 1 turns off the LED at 11Hz.
 * The LED on/off state should be slightly out of sync.<br>
 *
 * <b>Special connection requirements</b><br>
 * There are no special connection requirements for this example.<br>
 *
 * <b>Build procedures:</b><br>
 * @ref LPCOPEN_13XX_BUILDPROCS_XPRESSO<br>
 * @ref LPCOPEN_13XX_BUILDPROCS_KEIL<br>
 * @ref LPCOPEN_13XX_BUILDPROCS_IAR<br>
 *
 * <b>Supported boards and board setup:</b><br>
 * @ref LPCOPEN_13XX_BOARD_XPRESSO_1347<br>
 *
 * <b>Submitting LPCOpen issues:</b><br>
 * @ref LPCOPEN_COMMUNITY
 * @{
 */

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

#define TICKRATE_HZ1 (10)	/* 10 ticks per second */
#define TICKRATE_HZ2 (11)	/* 11 ticks per second */

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

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

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

/**
 * @brief	Handle interrupt from SysTick timer
 * @return	Nothing
 */
void SysTick_Handler(void)
{
	Board_LED_Set(0, false);
}

/**
 * @brief	Handle interrupt from 32-bit timer
 * @return	Nothing
 */
void TIMER32_0_IRQHandler(void)
{
	if (Chip_TIMER_MatchPending(LPC_TIMER32_0, 1)) {
		Chip_TIMER_ClearMatch(LPC_TIMER32_0, 1);
		Board_LED_Set(0, true);
	}
}

/**
 * @brief	main routine for blinky example
 * @return	Function should not exit.
 */
int main(void)
{
	uint32_t timerFreq;

	Board_Init();

	/* Enable and setup SysTick Timer at a periodic rate */
	SysTick_Config(SystemCoreClock / TICKRATE_HZ1);

	/* Enable timer 1 clock */
	Chip_TIMER_Init(LPC_TIMER32_0);

	/* Timer rate is system clock rate */
	timerFreq = Chip_Clock_GetSystemClockRate();

	/* Timer setup for match and interrupt at TICKRATE_HZ */
	Chip_TIMER_Reset(LPC_TIMER32_0);
	Chip_TIMER_MatchEnableInt(LPC_TIMER32_0, 1);
	Chip_TIMER_SetMatch(LPC_TIMER32_0, 1, (timerFreq / TICKRATE_HZ2));
	Chip_TIMER_ResetOnMatchEnable(LPC_TIMER32_0, 1);
	Chip_TIMER_Enable(LPC_TIMER32_0);

	/* Enable timer interrupt */
	NVIC_ClearPendingIRQ(TIMER_32_0_IRQn);
	NVIC_EnableIRQ(TIMER_32_0_IRQn);

	/* LEDs toggle in interrupt handlers */
	while (1) {
		__WFI();
	}

	return 0;
}

/**
 * @}
 */
