200 lines
7.0 KiB
C
200 lines
7.0 KiB
C
/**********************************************************************
|
|
* $Id$ 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.
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation is hereby granted, under NXP Semiconductors'
|
|
* relevant copyright 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.
|
|
**********************************************************************/
|
|
|
|
/* 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)
|
|
{
|
|
IntStatus 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 ------------------------------ */
|