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/***********************************************************************//**
* @file lpc17xx_rit.c
* @brief Contains all functions support for RIT firmware library on LPC17xx
* @version 2.0
* @date 21. May. 2010
* @author NXP MCU SW Application Team
**************************************************************************
* 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 RIT
* @{
*/
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_rit.h"
#include "lpc17xx_clkpwr.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 _RIT
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup RIT_Public_Functions
* @{
*/
/******************************************************************************//*
* @brief Initial for RIT
* - Turn on power and clock
* - Setup default register values
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @return None
*******************************************************************************/
void RIT_Init(LPC_RIT_TypeDef *RITx)
{
CHECK_PARAM(PARAM_RITx(RITx));
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCRIT, ENABLE);
//Set up default register values
RITx->RICOMPVAL = 0xFFFFFFFF;
RITx->RIMASK = 0x00000000;
RITx->RICTRL = 0x0C;
RITx->RICOUNTER = 0x00000000;
// Turn on power and clock
}
/******************************************************************************//*
* @brief DeInitial for RIT
* - Turn off power and clock
* - ReSetup default register values
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @return None
*******************************************************************************/
void RIT_DeInit(LPC_RIT_TypeDef *RITx)
{
CHECK_PARAM(PARAM_RITx(RITx));
// Turn off power and clock
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCRIT, DISABLE);
//ReSetup default register values
RITx->RICOMPVAL = 0xFFFFFFFF;
RITx->RIMASK = 0x00000000;
RITx->RICTRL = 0x0C;
RITx->RICOUNTER = 0x00000000;
}
/******************************************************************************//*
* @brief Set compare value, mask value and time counter value
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @param[in] time_interval: timer interval value (ms)
* @return None
*******************************************************************************/
void RIT_TimerConfig(LPC_RIT_TypeDef *RITx, uint32_t time_interval)
{
uint32_t clock_rate, cmp_value;
CHECK_PARAM(PARAM_RITx(RITx));
// Get PCLK value of RIT
clock_rate = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_RIT);
/* calculate compare value for RIT to generate interrupt at
* specified time interval
* COMPVAL = (RIT_PCLK * time_interval)/1000
* (with time_interval unit is millisecond)
*/
cmp_value = (clock_rate /1000) * time_interval;
RITx->RICOMPVAL = cmp_value;
/* Set timer enable clear bit to clear timer to 0 whenever
* counter value equals the contents of RICOMPVAL
*/
RITx->RICTRL |= (1<<1);
}
/******************************************************************************//*
* @brief Enable/Disable Timer
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @param[in] NewState New State of this function
* -ENABLE: Enable Timer
* -DISABLE: Disable Timer
* @return None
*******************************************************************************/
void RIT_Cmd(LPC_RIT_TypeDef *RITx, FunctionalState NewState)
{
CHECK_PARAM(PARAM_RITx(RITx));
CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
//Enable or Disable Timer
if(NewState==ENABLE)
{
RITx->RICTRL |= RIT_CTRL_TEN;
}
else
{
RITx->RICTRL &= ~RIT_CTRL_TEN;
}
}
/******************************************************************************//*
* @brief Timer Enable/Disable on debug
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @param[in] NewState New State of this function
* -ENABLE: The timer is halted whenever a hardware break condition occurs
* -DISABLE: Hardware break has no effect on the timer operation
* @return None
*******************************************************************************/
void RIT_TimerDebugCmd(LPC_RIT_TypeDef *RITx, FunctionalState NewState)
{
CHECK_PARAM(PARAM_RITx(RITx));
CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
//Timer Enable/Disable on break
if(NewState==ENABLE)
{
RITx->RICTRL |= RIT_CTRL_ENBR;
}
else
{
RITx->RICTRL &= ~RIT_CTRL_ENBR;
}
}
/******************************************************************************//*
* @brief Check whether interrupt flag is set or not
* @param[in] RITx is RIT peripheral selected, should be: LPC_RIT
* @return Current interrupt status, could be: SET/RESET
*******************************************************************************/
IntStatus RIT_GetIntStatus(LPC_RIT_TypeDef *RITx)
{
uint8_t result;
CHECK_PARAM(PARAM_RITx(RITx));
if((RITx->RICTRL&RIT_CTRL_INTEN)==1) result= SET;
else return RESET;
//clear interrupt flag
RITx->RICTRL |= RIT_CTRL_INTEN;
return result;
}
/**
* @}
*/
#endif /* _RIT */
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */
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