260 lines
10 KiB
C
260 lines
10 KiB
C
/***************************************************************************//**
|
|
* @file
|
|
* @brief Low Energy Timer (LETIMER) peripheral API for EFM32.
|
|
* @author Energy Micro AS
|
|
* @version 2.0.0
|
|
*******************************************************************************
|
|
* @section License
|
|
* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
|
|
*******************************************************************************
|
|
*
|
|
* This source code is the property of Energy Micro AS. The source and compiled
|
|
* code may only be used on Energy Micro "EFM32" microcontrollers.
|
|
*
|
|
* This copyright notice may not be removed from the source code nor changed.
|
|
*
|
|
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
|
|
* obligation to support this Software. Energy Micro AS is providing the
|
|
* Software "AS IS", with no express or implied warranties of any kind,
|
|
* including, but not limited to, any implied warranties of merchantability
|
|
* or fitness for any particular purpose or warranties against infringement
|
|
* of any proprietary rights of a third party.
|
|
*
|
|
* Energy Micro AS will not be liable for any consequential, incidental, or
|
|
* special damages, or any other relief, or for any claim by any third party,
|
|
* arising from your use of this Software.
|
|
*
|
|
******************************************************************************/
|
|
#ifndef __EFM32_LETIMER_H
|
|
#define __EFM32_LETIMER_H
|
|
|
|
#include <stdbool.h>
|
|
#include "efm32.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/***************************************************************************//**
|
|
* @addtogroup EFM32_Library
|
|
* @{
|
|
******************************************************************************/
|
|
|
|
/***************************************************************************//**
|
|
* @addtogroup LETIMER
|
|
* @{
|
|
******************************************************************************/
|
|
|
|
/*******************************************************************************
|
|
******************************** ENUMS ************************************
|
|
******************************************************************************/
|
|
|
|
/** Repeat mode. */
|
|
typedef enum
|
|
{
|
|
/** Count until stopped by SW. */
|
|
letimerRepeatFree = _LETIMER_CTRL_REPMODE_FREE,
|
|
/** Count REP0 times. */
|
|
letimerRepeatOneshot = _LETIMER_CTRL_REPMODE_ONESHOT,
|
|
/**
|
|
* Count REP0 times, if REP1 has been written to, it is loaded into
|
|
* REP0 when REP0 is about to be decremented to 0.
|
|
*/
|
|
letimerRepeatBuffered = _LETIMER_CTRL_REPMODE_BUFFERED,
|
|
/**
|
|
* Run as long as both REP0 and REP1 are not 0. Both REP0 and REP1
|
|
* are decremented when counter underflows.
|
|
*/
|
|
letimerRepeatDouble = _LETIMER_CTRL_REPMODE_DOUBLE
|
|
} LETIMER_RepeatMode_TypeDef;
|
|
|
|
|
|
/** Underflow action on output. */
|
|
typedef enum
|
|
{
|
|
/** No output action. */
|
|
letimerUFOANone = _LETIMER_CTRL_UFOA0_NONE,
|
|
/** Toggle output when counter underflows. */
|
|
letimerUFOAToggle = _LETIMER_CTRL_UFOA0_TOGGLE,
|
|
/** Hold output one LETIMER clock cycle when counter underflows. */
|
|
letimerUFOAPulse = _LETIMER_CTRL_UFOA0_PULSE,
|
|
/** Set output idle when counter underflows, and active when matching COMP1. */
|
|
letimerUFOAPwm = _LETIMER_CTRL_UFOA0_PWM
|
|
} LETIMER_UFOA_TypeDef;
|
|
|
|
/*******************************************************************************
|
|
******************************* STRUCTS ***********************************
|
|
******************************************************************************/
|
|
|
|
/** LETIMER initialization structure. */
|
|
typedef struct
|
|
{
|
|
bool enable; /**< Start counting when init completed. */
|
|
bool debugRun; /**< Counter shall keep running during debug halt. */
|
|
bool rtcComp0Enable; /**< Start counting on RTC COMP0 match. */
|
|
bool rtcComp1Enable; /**< Start counting on RTC COMP1 match. */
|
|
bool comp0Top; /**< Load COMP0 register into CNT when counter underflows. */
|
|
bool bufTop; /**< Load COMP1 into COMP0 when REP0 reaches 0. */
|
|
uint8_t out0Pol; /**< Idle value for output 0. */
|
|
uint8_t out1Pol; /**< Idle value for output 1. */
|
|
LETIMER_UFOA_TypeDef ufoa0; /**< Underflow output 0 action. */
|
|
LETIMER_UFOA_TypeDef ufoa1; /**< Underflow output 1 action. */
|
|
LETIMER_RepeatMode_TypeDef repMode; /**< Repeat mode. */
|
|
} LETIMER_Init_TypeDef;
|
|
|
|
/** Default config for LETIMER init structure. */
|
|
#define LETIMER_INIT_DEFAULT \
|
|
{ true, /* Enable timer when init complete. */ \
|
|
false, /* Stop counter during debug halt. */ \
|
|
false, /* Do not start counting on RTC COMP0 match. */ \
|
|
false, /* Do not start counting on RTC COMP1 match. */ \
|
|
false, /* Do not load COMP0 into CNT on underflow. */ \
|
|
false, /* Do not load COMP1 into COMP0 when REP0 reaches 0. */ \
|
|
0, /* Idle value 0 for output 0. */ \
|
|
0, /* Idle value 0 for output 1. */ \
|
|
letimerUFOANone, /* No action on underflow on output 0. */ \
|
|
letimerUFOANone, /* No action on underflow on output 1. */ \
|
|
letimerRepeatFree /* Count until stopped by SW. */ \
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
***************************** PROTOTYPES **********************************
|
|
******************************************************************************/
|
|
|
|
uint32_t LETIMER_CompareGet(LETIMER_TypeDef *letimer, unsigned int comp);
|
|
void LETIMER_CompareSet(LETIMER_TypeDef *letimer,
|
|
unsigned int comp,
|
|
uint32_t value);
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Get LETIMER counter value.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @return
|
|
* Current LETIMER counter value.
|
|
******************************************************************************/
|
|
static __INLINE uint32_t LETIMER_CounterGet(LETIMER_TypeDef *letimer)
|
|
{
|
|
return(letimer->CNT);
|
|
}
|
|
|
|
|
|
void LETIMER_Enable(LETIMER_TypeDef *letimer, bool enable);
|
|
void LETIMER_FreezeEnable(LETIMER_TypeDef *letimer, bool enable);
|
|
void LETIMER_Init(LETIMER_TypeDef *letimer, const LETIMER_Init_TypeDef *init);
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Clear one or more pending LETIMER interrupts.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @param[in] flags
|
|
* Pending LETIMER interrupt source to clear. Use a bitwise logic OR
|
|
* combination of valid interrupt flags for the LETIMER module
|
|
* (LETIMER_IF_nnn).
|
|
******************************************************************************/
|
|
static __INLINE void LETIMER_IntClear(LETIMER_TypeDef *letimer, uint32_t flags)
|
|
{
|
|
letimer->IFC = flags;
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Disable one or more LETIMER interrupts.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @param[in] flags
|
|
* LETIMER interrupt sources to disable. Use a bitwise logic OR combination of
|
|
* valid interrupt flags for the LETIMER module (LETIMER_IF_nnn).
|
|
******************************************************************************/
|
|
static __INLINE void LETIMER_IntDisable(LETIMER_TypeDef *letimer, uint32_t flags)
|
|
{
|
|
letimer->IEN &= ~(flags);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable one or more LETIMER interrupts.
|
|
*
|
|
* @note
|
|
* Depending on the use, a pending interrupt may already be set prior to
|
|
* enabling the interrupt. Consider using LETIMER_IntClear() prior to enabling
|
|
* if such a pending interrupt should be ignored.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @param[in] flags
|
|
* LETIMER interrupt sources to enable. Use a bitwise logic OR combination of
|
|
* valid interrupt flags for the LETIMER module (LETIMER_IF_nnn).
|
|
******************************************************************************/
|
|
static __INLINE void LETIMER_IntEnable(LETIMER_TypeDef *letimer, uint32_t flags)
|
|
{
|
|
letimer->IEN |= flags;
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Get pending LETIMER interrupt flags.
|
|
*
|
|
* @note
|
|
* The event bits are not cleared by the use of this function.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @return
|
|
* LETIMER interrupt sources pending. A bitwise logic OR combination of
|
|
* valid interrupt flags for the LETIMER module (LETIMER_IF_nnn).
|
|
******************************************************************************/
|
|
static __INLINE uint32_t LETIMER_IntGet(LETIMER_TypeDef *letimer)
|
|
{
|
|
return(letimer->IF);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Set one or more pending LETIMER interrupts from SW.
|
|
*
|
|
* @param[in] letimer
|
|
* Pointer to LETIMER peripheral register block.
|
|
*
|
|
* @param[in] flags
|
|
* LETIMER interrupt sources to set to pending. Use a bitwise logic OR
|
|
* combination of valid interrupt flags for the LETIMER module (LETIMER_IF_nnn).
|
|
******************************************************************************/
|
|
static __INLINE void LETIMER_IntSet(LETIMER_TypeDef *letimer, uint32_t flags)
|
|
{
|
|
letimer->IFS = flags;
|
|
}
|
|
|
|
uint32_t LETIMER_RepeatGet(LETIMER_TypeDef *letimer, unsigned int rep);
|
|
void LETIMER_RepeatSet(LETIMER_TypeDef *letimer,
|
|
unsigned int rep,
|
|
uint32_t value);
|
|
void LETIMER_Reset(LETIMER_TypeDef *letimer);
|
|
|
|
|
|
/** @} (end addtogroup LETIMER) */
|
|
/** @} (end addtogroup EFM32_Library) */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __EFM32_LETIMER_H */
|