/*
 * @brief Blinky example using a timer and interrupt
 *
 * @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 <stdio.h>

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

#define TICKRATE_HZ 10

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

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

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

/**
 * @brief	Handle interrupt from 32-bit timer
 * @return	Nothing
 */
void TIMER1_IRQHandler(void)
{
	static bool On = false;

	if (Chip_TIMER_MatchPending(LPC_TIMER1, 1)) {
		Chip_TIMER_ClearMatch(LPC_TIMER1, 1);
		On = (bool) !On;
		Board_LED_Set(0, On);
	}
}

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

	SystemCoreClockUpdate();
	Board_Init();

	/* Enable timer 1 clock and reset it */
	Chip_TIMER_Init(LPC_TIMER1);
	Chip_RGU_TriggerReset(RGU_TIMER1_RST);
	while (Chip_RGU_InReset(RGU_TIMER1_RST)) {}

	/* Get timer 1 peripheral clock rate */
	timerFreq = Chip_Clock_GetRate(CLK_MX_TIMER1);

	/* Timer setup for match and interrupt at TICKRATE_HZ */
	Chip_TIMER_Reset(LPC_TIMER1);
	Chip_TIMER_MatchEnableInt(LPC_TIMER1, 1);
	Chip_TIMER_SetMatch(LPC_TIMER1, 1, (timerFreq / TICKRATE_HZ));
	Chip_TIMER_ResetOnMatchEnable(LPC_TIMER1, 1);
	Chip_TIMER_Enable(LPC_TIMER1);

	/* Enable timer interrupt */
	NVIC_EnableIRQ(TIMER1_IRQn);
	NVIC_ClearPendingIRQ(TIMER1_IRQn);

	DEBUGSTR("Blinky example using timer 1!\r\n");
	DEBUGOUT("Timer 1 clock     = %d Hz\r\n", timerFreq);
	DEBUGOUT("Timer 1 tick rate = %d Hz\r\n", TICKRATE_HZ);

	while (1) {
		__WFI();
	}
}
