lpc17xx_rit.c
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CLexer
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r16 | /********************************************************************** | ||
* $Id$ lpc17xx_rit.c 2010-05-21 | ||||
*//** | ||||
* @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 | ||||
* | ||||
* Copyright(C) 2010, 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 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 ------------------------------ */ | ||||