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Marlin/frameworks/CMSIS/LPC1768/driver/lpc17xx_timer.c

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/**********************************************************************
* $Id$ 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.
* 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 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;
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 0xFFFF FFFF if register pointer is bad
**********************************************************************/
uint32_t converPtrToTimeNum (LPC_TIM_TypeDef *TIMx)
{
uint32_t tnum = 0xFFFFFFFF;
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 ------------------------------ */
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