lpc17xx_timer.c.svn-base

uCOSII_lwip_lpc1768

/**********************************************************************
* $Id$		lpc17xx_timer.c				2011-03-10
*//**
* @file		lpc17xx_timer.c
* @brief	Contains all functions support for Timer firmware library
* 			on LPC17xx
* @version	3.1
* @date		10. March. 2011
* @author	NXP MCU SW Application Team
*
* Copyright(C) 2011, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
**********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup TIM
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_timer.h"
#include "lpc17xx_clkpwr.h"
#include "lpc17xx_pinsel.h"

/* If this source file built with example, the LPC17xx FW library configuration
 * file in each example directory ("lpc17xx_libcfg.h") must be included,
 * otherwise the default FW library configuration file must be included instead
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */

#ifdef _TIM

/* Private Functions ---------------------------------------------------------- */

static uint32_t getPClock (uint32_t timernum);
static uint32_t converUSecToVal (uint32_t timernum, uint32_t usec);
static uint32_t converPtrToTimeNum (LPC_TIM_TypeDef *TIMx);


/*********************************************************************//**
 * @brief 		Get peripheral clock of each timer controller
 * @param[in]	timernum Timer number
 * @return 		Peripheral clock of timer
 **********************************************************************/
static uint32_t getPClock (uint32_t timernum)
{
	uint32_t clkdlycnt;
	switch (timernum)
	{
	case 0:
		clkdlycnt = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_TIMER0);
		break;

	case 1:
		clkdlycnt = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_TIMER1);
		break;

	case 2:
		clkdlycnt = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_TIMER2);
		break;

	case 3:
		clkdlycnt = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_TIMER3);
		break;
	}
	return clkdlycnt;
}


/*********************************************************************//**
 * @brief 		Convert a time to a timer count value
 * @param[in]	timernum Timer number
 * @param[in]	usec Time in microseconds
 * @return 		The number of required clock ticks to give the time delay
 **********************************************************************/
uint32_t converUSecToVal (uint32_t timernum, uint32_t usec)
{
	uint64_t clkdlycnt;

	// Get Pclock of timer
	clkdlycnt = (uint64_t) getPClock(timernum);

	clkdlycnt = (clkdlycnt * usec) / 1000000;
	return (uint32_t) clkdlycnt;
}


/*********************************************************************//**
 * @brief 		Convert a timer register pointer to a timer number
 * @param[in]	TIMx Pointer to LPC_TIM_TypeDef, should be:
 * 				- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @return 		The timer number (0 to 3) or -1 if register pointer is bad
 **********************************************************************/
uint32_t converPtrToTimeNum (LPC_TIM_TypeDef *TIMx)
{
	uint32_t tnum = -1;

	if (TIMx == LPC_TIM0)
	{
		tnum = 0;
	}
	else if (TIMx == LPC_TIM1)
	{
		tnum = 1;
	}
	else if (TIMx == LPC_TIM2)
	{
		tnum = 2;
	}
	else if (TIMx == LPC_TIM3)
	{
		tnum = 3;
	}

	return tnum;
}

/* End of Private Functions ---------------------------------------------------- */


/* Public Functions ----------------------------------------------------------- */
/** @addtogroup TIM_Public_Functions
 * @{
 */

/*********************************************************************//**
 * @brief 		Get Interrupt Status
 * @param[in]	TIMx Timer selection, should be:
 *   			- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @param[in]	IntFlag: interrupt type, should be:
 * 				- TIM_MR0_INT: Interrupt for Match channel 0
 * 				- TIM_MR1_INT: Interrupt for Match channel 1
 * 				- TIM_MR2_INT: Interrupt for Match channel 2
 * 				- TIM_MR3_INT: Interrupt for Match channel 3
 * 				- TIM_CR0_INT: Interrupt for Capture channel 0
 * 				- TIM_CR1_INT: Interrupt for Capture channel 1
 * @return 		FlagStatus
 * 				- SET : interrupt
 * 				- RESET : no interrupt
 **********************************************************************/
FlagStatus TIM_GetIntStatus(LPC_TIM_TypeDef *TIMx, TIM_INT_TYPE IntFlag)
{
	uint8_t temp;
	CHECK_PARAM(PARAM_TIMx(TIMx));
	CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag));
	temp = (TIMx->IR)& TIM_IR_CLR(IntFlag);
	if (temp)
		return SET;

	return RESET;

}
/*********************************************************************//**
 * @brief 		Get Capture Interrupt Status
 * @param[in]	TIMx Timer selection, should be:
 *  	   		- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @param[in]	IntFlag: interrupt type, should be:
 * 				- TIM_MR0_INT: Interrupt for Match channel 0
 * 				- TIM_MR1_INT: Interrupt for Match channel 1
 * 				- TIM_MR2_INT: Interrupt for Match channel 2
 * 				- TIM_MR3_INT: Interrupt for Match channel 3
 * 				- TIM_CR0_INT: Interrupt for Capture channel 0
 * 				- TIM_CR1_INT: Interrupt for Capture channel 1
 * @return 		FlagStatus
 * 				- SET : interrupt
 * 				- RESET : no interrupt
 **********************************************************************/
FlagStatus TIM_GetIntCaptureStatus(LPC_TIM_TypeDef *TIMx, TIM_INT_TYPE IntFlag)
{
	uint8_t temp;
	CHECK_PARAM(PARAM_TIMx(TIMx));
	CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag));
	temp = (TIMx->IR) & (1<<(4+IntFlag));
	if(temp)
		return SET;
	return RESET;
}
/*********************************************************************//**
 * @brief 		Clear Interrupt pending
 * @param[in]	TIMx Timer selection, should be:
 *    			- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @param[in]	IntFlag: interrupt type, should be:
 * 				- TIM_MR0_INT: Interrupt for Match channel 0
 * 				- TIM_MR1_INT: Interrupt for Match channel 1
 * 				- TIM_MR2_INT: Interrupt for Match channel 2
 * 				- TIM_MR3_INT: Interrupt for Match channel 3
 * 				- TIM_CR0_INT: Interrupt for Capture channel 0
 * 				- TIM_CR1_INT: Interrupt for Capture channel 1
 * @return 		None
 **********************************************************************/
void TIM_ClearIntPending(LPC_TIM_TypeDef *TIMx, TIM_INT_TYPE IntFlag)
{
	CHECK_PARAM(PARAM_TIMx(TIMx));
	CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag));
	TIMx->IR = TIM_IR_CLR(IntFlag);
}

/*********************************************************************//**
 * @brief 		Clear Capture Interrupt pending
 * @param[in]	TIMx Timer selection, should be
 *    			- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @param[in]	IntFlag interrupt type, should be:
 *				- TIM_MR0_INT: Interrupt for Match channel 0
 * 				- TIM_MR1_INT: Interrupt for Match channel 1
 * 				- TIM_MR2_INT: Interrupt for Match channel 2
 * 				- TIM_MR3_INT: Interrupt for Match channel 3
 * 				- TIM_CR0_INT: Interrupt for Capture channel 0
 * 				- TIM_CR1_INT: Interrupt for Capture channel 1
 * @return 		None
 **********************************************************************/
void TIM_ClearIntCapturePending(LPC_TIM_TypeDef *TIMx, TIM_INT_TYPE IntFlag)
{
	CHECK_PARAM(PARAM_TIMx(TIMx));
	CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag));
	TIMx->IR = (1<<(4+IntFlag));
}

/*********************************************************************//**
 * @brief 		Configuration for Timer at initial time
 * @param[in] 	TimerCounterMode timer counter mode, should be:
 * 				- TIM_TIMER_MODE: Timer mode
 * 				- TIM_COUNTER_RISING_MODE: Counter rising mode
 * 				- TIM_COUNTER_FALLING_MODE: Counter falling mode
 * 				- TIM_COUNTER_ANY_MODE:Counter on both edges
 * @param[in] 	TIM_ConfigStruct pointer to TIM_TIMERCFG_Type or
 * 				TIM_COUNTERCFG_Type
 * @return 		None
 **********************************************************************/
void TIM_ConfigStructInit(TIM_MODE_OPT TimerCounterMode, void *TIM_ConfigStruct)
{
	if (TimerCounterMode == TIM_TIMER_MODE )
	{
		TIM_TIMERCFG_Type * pTimeCfg = (TIM_TIMERCFG_Type *)TIM_ConfigStruct;
		pTimeCfg->PrescaleOption = TIM_PRESCALE_USVAL;
		pTimeCfg->PrescaleValue = 1;
	}
	else
	{
		TIM_COUNTERCFG_Type * pCounterCfg = (TIM_COUNTERCFG_Type *)TIM_ConfigStruct;
		pCounterCfg->CountInputSelect = TIM_COUNTER_INCAP0;
	}
}

/*********************************************************************//**
 * @brief 		Initial Timer/Counter device
 * 				 	Set Clock frequency for Timer
 * 					Set initial configuration for Timer
 * @param[in]	TIMx  Timer selection, should be:
 * 				- LPC_TIM0: TIMER0 peripheral
 * 				- LPC_TIM1: TIMER1 peripheral
 * 				- LPC_TIM2: TIMER2 peripheral
 * 				- LPC_TIM3: TIMER3 peripheral
 * @param[in]	TimerCounterMode Timer counter mode, should be:
 * 				- TIM_TIMER_MODE: Timer mode
 * 				- TIM_COUNTER_RISING_MODE: Counter rising mode
 * 				- TIM_COUNTER_FALLING_MODE: Counter falling mode
 * 				- TIM_COUNTER_ANY_MODE:Counter on both edges
 * @param[in]	TIM_ConfigStruct pointer to TIM_TIMERCFG_Type
 * 				that contains the configuration information for the
 *                    specified Timer peripheral.
 * @return 		None
 **********************************************************************/
void TIM_Init(LPC_TIM_TypeDef *TIMx, TIM_MODE_OPT TimerCounterMode, void *TIM_ConfigStruct)
{
	TIM_TIMERCFG_Type *pTimeCfg;
	TIM_COUNTERCFG_Type *pCounterCfg;

	CHECK_PARAM(PARAM_TIMx(TIMx));
	CHECK_PARAM(PARAM_TIM_MODE_OPT(TimerCounterMode));

	//set power