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Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_timer.c
- Revision:
- 3:f151d08d335c
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- 2:1df0b61d3b5a
diff -r 1df0b61d3b5a -r f151d08d335c libs/LPC17xx/LPC17xxLib/src/lpc17xx_timer.c --- a/libs/LPC17xx/LPC17xxLib/src/lpc17xx_timer.c Fri Feb 28 18:52:52 2014 -0800 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,606 +0,0 @@ -#ifdef __LPC17XX__ - -/********************************************************************** -* $Id$ 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 = 0; - 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 = (uint32_t)-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 - - if (TIMx== LPC_TIM0) - { - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM0, ENABLE); - //PCLK_Timer0 = CCLK/4 - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER0, CLKPWR_PCLKSEL_CCLK_DIV_4); - } - else if (TIMx== LPC_TIM1) - { - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM1, ENABLE); - //PCLK_Timer1 = CCLK/4 - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER1, CLKPWR_PCLKSEL_CCLK_DIV_4); - - } - - else if (TIMx== LPC_TIM2) - { - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM2, ENABLE); - //PCLK_Timer2= CCLK/4 - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_TIMER2, CLKPWR_PCLKSEL_CCLK_DIV_4); - } - else if (TIMx== LPC_TIM3) - { - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCTIM3, ENABLE); - //PCLK_Timer3= CCLK/4 - 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; - TIMx->TCR |= (1<<1); //Reset Counter - TIMx->TCR &= ~(1<<1); //release reset - 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 = converUSecToVal (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, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @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, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @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, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @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, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @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) -{ - - CHECK_PARAM(PARAM_TIMx(TIMx)); - CHECK_PARAM(PARAM_TIM_EXTMATCH_OPT(TIM_MatchConfigStruct->ExtMatchOutputType)); - - switch(TIM_MatchConfigStruct->MatchChannel) - { - case 0: - TIMx->MR0 = TIM_MatchConfigStruct->MatchValue; - break; - case 1: - TIMx->MR1 = TIM_MatchConfigStruct->MatchValue; - break; - case 2: - TIMx->MR2 = TIM_MatchConfigStruct->MatchValue; - break; - case 3: - TIMx->MR3 = TIM_MatchConfigStruct->MatchValue; - break; - default: - //Error match value - //Error loop - while(1); - } - //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); - - // match output type - - TIMx->EMR &= ~TIM_EM_MASK(TIM_MatchConfigStruct->MatchChannel); - TIMx->EMR |= TIM_EM_SET(TIM_MatchConfigStruct->MatchChannel,TIM_MatchConfigStruct->ExtMatchOutputType); -} -/*********************************************************************//** - * @brief Update Match value - * @param[in] TIMx Pointer to timer device, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @param[in] MatchChannel Match channel, should be: 0..3 - * @param[in] MatchValue updated match value - * @return None - **********************************************************************/ -void TIM_UpdateMatchValue(LPC_TIM_TypeDef *TIMx,uint8_t MatchChannel, uint32_t MatchValue) -{ - CHECK_PARAM(PARAM_TIMx(TIMx)); - switch(MatchChannel) - { - case 0: - TIMx->MR0 = MatchValue; - break; - case 1: - TIMx->MR1 = MatchValue; - break; - case 2: - TIMx->MR2 = MatchValue; - break; - case 3: - TIMx->MR3 = MatchValue; - break; - default: - //Error Loop - while(1); - } - -} -/*********************************************************************//** - * @brief Configuration for Capture register - * @param[in] TIMx Pointer to timer device, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * - 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) -{ - - CHECK_PARAM(PARAM_TIMx(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, should be: - * - LPC_TIM0: TIMER0 peripheral - * - LPC_TIM1: TIMER1 peripheral - * - LPC_TIM2: TIMER2 peripheral - * - LPC_TIM3: TIMER3 peripheral - * @param[in] CaptureChannel: capture channel number, should be: - * - TIM_COUNTER_INCAP0: CAPn.0 input pin for TIMERn - * - TIM_COUNTER_INCAP1: CAPn.1 input pin for TIMERn - * @return Value of capture register - **********************************************************************/ -uint32_t TIM_GetCaptureValue(LPC_TIM_TypeDef *TIMx, TIM_COUNTER_INPUT_OPT 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 ------------------------------ */ -#endif /* __LPC17XX__ */