lpc17xx_timer.c
479 lines
| 15.2 KiB
| text/x-c
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CLexer
jeandet@pc-de-jeandet3.LAB-LPP.LOCAL
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r18 | /** | ||
* @file : lpc17xx_timer.c | ||||
* @brief : Contains all functions support for Timer firmware library on LPC17xx | ||||
* @version : 1.0 | ||||
* @date : 14. April. 2009 | ||||
* @author : HieuNguyen | ||||
************************************************************************** | ||||
* 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 ---------------------------------------------------------- */ | ||||
/** @defgroup TIM_Private_Functions | ||||
* @{ | ||||
*/ | ||||
uint32_t TIM_GetPClock (uint32_t timernum); | ||||
uint32_t TIM_ConverUSecToVal (uint32_t timernum, uint32_t usec); | ||||
uint32_t TIM_ConverPtrToTimeNum (LPC_TIM_TypeDef *TIMx); | ||||
/*********************************************************************//** | ||||
* @brief Get peripheral clock of each timer controller | ||||
* @param[in] timernum Timer number | ||||
* @return Peripheral clock of timer | ||||
**********************************************************************/ | ||||
uint32_t TIM_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 TIM_ConverUSecToVal (uint32_t timernum, uint32_t usec) | ||||
{ | ||||
uint64_t clkdlycnt; | ||||
// Get Pclock of timer | ||||
clkdlycnt = (uint64_t) TIM_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 a timer register set | ||||
* @return The timer number (0 to 3) or -1 if register pointer is bad | ||||
**********************************************************************/ | ||||
uint32_t TIM_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; | ||||
} | ||||
/** | ||||
* @} | ||||
*/ | ||||
/* Public Functions ----------------------------------------------------------- */ | ||||
/** @addtogroup TIM_Public_Functions | ||||
* @{ | ||||
*/ | ||||
/*********************************************************************//** | ||||
* @brief Get Interrupt Status | ||||
* @param[in] TIMx Timer selection, should be TIM0, TIM1, TIM2, TIM3 | ||||
* @param[in] IntFlag | ||||
* @return FlagStatus | ||||
* - SET : interrupt | ||||
* - RESET : no interrupt | ||||
**********************************************************************/ | ||||
FlagStatus TIM_GetIntStatus(LPC_TIM_TypeDef *TIMx, uint8_t IntFlag) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag)); | ||||
uint8_t 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 TIM0, TIM1, TIM2, TIM3 | ||||
* @param[in] IntFlag | ||||
* @return FlagStatus | ||||
* - SET : interrupt | ||||
* - RESET : no interrupt | ||||
**********************************************************************/ | ||||
FlagStatus TIM_GetIntCaptureStatus(LPC_TIM_TypeDef *TIMx, uint8_t IntFlag) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
CHECK_PARAM(PARAM_TIM_INT_TYPE(IntFlag)); | ||||
uint8_t temp = (TIMx->IR) & (1<<(4+IntFlag)); | ||||
if(temp) | ||||
return SET; | ||||
return RESET; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Clear Interrupt pending | ||||
* @param[in] TIMx Timer selection, should be TIM0, TIM1, TIM2, TIM3 | ||||
* @param[in] IntFlag should be in TIM_INT_TYPE enum | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ClearIntPending(LPC_TIM_TypeDef *TIMx, uint8_t 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 TIM0, TIM1, TIM2, TIM3 | ||||
* @param[in] IntFlag should be in TIM_INT_TYPE enum | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ClearIntCapturePending(LPC_TIM_TypeDef *TIMx, uint8_t 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 Should be : | ||||
* - PrescaleOption = TC_PRESCALE_USVAL, | ||||
* - PrescaleValue = 1 | ||||
* Counter mode with | ||||
* - Caption channel 0 | ||||
* @param[in] TIM_ConfigStruct pointer to TIM_TIMERCFG_Type or | ||||
* TIM_COUNTERCFG_Type | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ConfigStructInit(uint8_t 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 TIM0, TIM1, TIM2, TIM3 | ||||
* @param[in] TimerCounterMode TIM_MODE_OPT | ||||
* @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, uint8_t TimerCounterMode, void *TIM_ConfigStruct) | ||||
{ | ||||
TIM_TIMERCFG_Type *pTimeCfg; | ||||
TIM_COUNTERCFG_Type *pCounterCfg; | ||||
uint32_t timer; | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
CHECK_PARAM(PARAM_TIM_MODE_OPT(TimerCounterMode)); | ||||
timer = TIM_ConverPtrToTimeNum(TIMx) ; | ||||
//set power | ||||
if (TIMx== LPC_TIM0) | ||||
{ | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM0, ENABLE); | ||||
CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER0, CLKPWR_PCLKSEL_CCLK_DIV_4); | ||||
} | ||||
else if (TIMx== LPC_TIM1) | ||||
{ | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM1, ENABLE); | ||||
CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER1, CLKPWR_PCLKSEL_CCLK_DIV_4); | ||||
} | ||||
else if (TIMx== LPC_TIM2) | ||||
{ | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM2, ENABLE); | ||||
CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER2, CLKPWR_PCLKSEL_CCLK_DIV_4); | ||||
} | ||||
else if (TIMx== LPC_TIM3) | ||||
{ | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM3, ENABLE); | ||||
CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER3, CLKPWR_PCLKSEL_CCLK_DIV_4); | ||||
} | ||||
TIMx->CCR &= ~TIM_CTCR_MODE_MASK; | ||||
TIMx->CCR |= TIM_TIMER_MODE; | ||||
TIMx->TC =0; | ||||
TIMx->PC =0; | ||||
TIMx->PR =0; | ||||
if (TimerCounterMode == TIM_TIMER_MODE ) | ||||
{ | ||||
pTimeCfg = (TIM_TIMERCFG_Type *)TIM_ConfigStruct; | ||||
if (pTimeCfg->PrescaleOption == TIM_PRESCALE_TICKVAL) | ||||
{ | ||||
TIMx->PR = pTimeCfg->PrescaleValue -1 ; | ||||
} | ||||
else | ||||
{ | ||||
TIMx->PR = TIM_ConverUSecToVal (TIM_ConverPtrToTimeNum(TIMx),pTimeCfg->PrescaleValue)-1; | ||||
} | ||||
} | ||||
else | ||||
{ | ||||
pCounterCfg = (TIM_COUNTERCFG_Type *)TIM_ConfigStruct; | ||||
TIMx->CCR &= ~TIM_CTCR_INPUT_MASK; | ||||
if (pCounterCfg->CountInputSelect == TIM_COUNTER_INCAP1) | ||||
TIMx->CCR |= _BIT(2); | ||||
} | ||||
// Clear interrupt pending | ||||
TIMx->IR = 0xFFFFFFFF; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Close Timer/Counter device | ||||
* @param[in] TIMx Pointer to timer device | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_DeInit (LPC_TIM_TypeDef *TIMx) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
// Disable timer/counter | ||||
TIMx->TCR = 0x00; | ||||
// Disable power | ||||
if (TIMx== LPC_TIM0) | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM0, DISABLE); | ||||
else if (TIMx== LPC_TIM1) | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM1, DISABLE); | ||||
else if (TIMx== LPC_TIM2) | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM2, DISABLE); | ||||
else if (TIMx== LPC_TIM3) | ||||
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM2, DISABLE); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Start/Stop Timer/Counter device | ||||
* @param[in] TIMx Pointer to timer device | ||||
* @param[in] NewState | ||||
* - ENABLE : set timer enable | ||||
* - DISABLE : disable timer | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_Cmd(LPC_TIM_TypeDef *TIMx, FunctionalState NewState) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
if (NewState == ENABLE) | ||||
{ | ||||
TIMx->TCR |= TIM_ENABLE; | ||||
} | ||||
else | ||||
{ | ||||
TIMx->TCR &= ~TIM_ENABLE; | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Reset Timer/Counter device, | ||||
* Make TC and PC are synchronously reset on the next | ||||
* positive edge of PCLK | ||||
* @param[in] TIMx Pointer to timer device | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ResetCounter(LPC_TIM_TypeDef *TIMx) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
TIMx->TCR |= TIM_RESET; | ||||
TIMx->TCR &= ~TIM_RESET; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Configuration for Match register | ||||
* @param[in] TIMx Pointer to timer device | ||||
* @param[in] TIM_MatchConfigStruct Pointer to TIM_MATCHCFG_Type | ||||
* - MatchChannel : choose channel 0 or 1 | ||||
* - IntOnMatch : if SET, interrupt will be generated when MRxx match | ||||
* the value in TC | ||||
* - StopOnMatch : if SET, TC and PC will be stopped whenM Rxx match | ||||
* the value in TC | ||||
* - ResetOnMatch : if SET, Reset on MR0 when MRxx match | ||||
* the value in TC | ||||
* -ExtMatchOutputType: Select output for external match | ||||
* + 0: Do nothing for external output pin if match | ||||
* + 1: Force external output pin to low if match | ||||
* + 2: Force external output pin to high if match | ||||
* + 3: Toggle external output pin if match | ||||
* MatchValue: Set the value to be compared with TC value | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ConfigMatch(LPC_TIM_TypeDef *TIMx, TIM_MATCHCFG_Type *TIM_MatchConfigStruct) | ||||
{ | ||||
uint32_t timer; | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
CHECK_PARAM(PARAM_TIM_EXTMATCH_OPT(TIM_MatchConfigStruct->ExtMatchOutputType)); | ||||
timer = TIM_ConverPtrToTimeNum(TIMx) ; | ||||
switch(TIM_MatchConfigStruct->MatchChannel) | ||||
{ | ||||
case 0: | ||||
TIMx->MR0 = TIM_MatchConfigStruct->MatchValue; | ||||
break; | ||||
case 1: | ||||
TIMx->MR1 = TIM_MatchConfigStruct->MatchValue; | ||||
break; | ||||
} | ||||
//interrupt on MRn | ||||
TIMx->MCR &=~TIM_MCR_CHANNEL_MASKBIT(TIM_MatchConfigStruct->MatchChannel); | ||||
if (TIM_MatchConfigStruct->IntOnMatch) | ||||
TIMx->MCR |= TIM_INT_ON_MATCH(TIM_MatchConfigStruct->MatchChannel); | ||||
//reset on MRn | ||||
if (TIM_MatchConfigStruct->ResetOnMatch) | ||||
TIMx->MCR |= TIM_RESET_ON_MATCH(TIM_MatchConfigStruct->MatchChannel); | ||||
//stop on MRn | ||||
if (TIM_MatchConfigStruct->StopOnMatch) | ||||
TIMx->MCR |= TIM_STOP_ON_MATCH(TIM_MatchConfigStruct->MatchChannel); | ||||
// TIMx->MCR = 0x02; | ||||
// match output type | ||||
TIMx->EMR &= ~TIM_EM_MASK(TIM_MatchConfigStruct->MatchChannel); | ||||
TIMx->EMR = TIM_EM_SET(TIM_MatchConfigStruct->MatchChannel,TIM_MatchConfigStruct->ExtMatchOutputType); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Configuration for Capture register | ||||
* @param[in] TIMx Pointer to timer device | ||||
* - CaptureChannel: set the channel to capture data | ||||
* - RisingEdge : if SET, Capture at rising edge | ||||
* - FallingEdge : if SET, Capture at falling edge | ||||
* - IntOnCaption : if SET, Capture generate interrupt | ||||
* @param[in] TIM_CaptureConfigStruct Pointer to TIM_CAPTURECFG_Type | ||||
* @return None | ||||
**********************************************************************/ | ||||
void TIM_ConfigCapture(LPC_TIM_TypeDef *TIMx, TIM_CAPTURECFG_Type *TIM_CaptureConfigStruct) | ||||
{ | ||||
uint32_t timer; | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
timer = TIM_ConverPtrToTimeNum(TIMx) ; | ||||
TIMx->CCR &= ~TIM_CCR_CHANNEL_MASKBIT(TIM_CaptureConfigStruct->CaptureChannel); | ||||
if (TIM_CaptureConfigStruct->RisingEdge) | ||||
TIMx->CCR |= TIM_CAP_RISING(TIM_CaptureConfigStruct->CaptureChannel); | ||||
if (TIM_CaptureConfigStruct->FallingEdge) | ||||
TIMx->CCR |= TIM_CAP_FALLING(TIM_CaptureConfigStruct->CaptureChannel); | ||||
if (TIM_CaptureConfigStruct->IntOnCaption) | ||||
TIMx->CCR |= TIM_INT_ON_CAP(TIM_CaptureConfigStruct->CaptureChannel); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Read value of capture register in timer/counter device | ||||
* @param[in] TIMx Pointer to timer/counter device | ||||
* @param[in] CaptureChannel: capture channel number | ||||
* @return Value of capture register | ||||
**********************************************************************/ | ||||
uint32_t TIM_GetCaptureValue(LPC_TIM_TypeDef *TIMx, uint8_t CaptureChannel) | ||||
{ | ||||
CHECK_PARAM(PARAM_TIMx(TIMx)); | ||||
CHECK_PARAM(PARAM_TIM_COUNTER_INPUT_OPT(CaptureChannel)); | ||||
if(CaptureChannel==0) | ||||
return TIMx->CR0; | ||||
else | ||||
return TIMx->CR1; | ||||
} | ||||
/** | ||||
* @} | ||||
*/ | ||||
#endif /* _TIMER */ | ||||
/** | ||||
* @} | ||||
*/ | ||||
/* --------------------------------- End Of File ------------------------------ */ | ||||