188 lines
6.7 KiB
C
188 lines
6.7 KiB
C
/***************************************************************************//**
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* @file
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* @brief Real Time Counter (RTC) peripheral API
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* @author Energy Micro AS
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* @version 3.0.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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******************************************************************************/
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#ifndef __EM_RTC_H
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#define __EM_RTC_H
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#include <stdbool.h>
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#include "em_part.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***************************************************************************//**
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* @addtogroup EM_Library
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup RTC
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* @{
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******************************************************************************/
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/*******************************************************************************
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******************************* STRUCTS ***********************************
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******************************************************************************/
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/** RTC initialization structure. */
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typedef struct
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{
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bool enable; /**< Start counting when init completed. */
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bool debugRun; /**< Counter shall keep running during debug halt. */
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bool comp0Top; /**< Use compare register 0 as max count value. */
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} RTC_Init_TypeDef;
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/** Suggested default config for RTC init structure. */
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#define RTC_INIT_DEFAULT \
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{ true, /* Start counting when init done */ \
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false, /* Disable updating during debug halt */ \
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true /* Restart counting from 0 when reaching COMP0 */ \
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}
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/*******************************************************************************
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***************************** PROTOTYPES **********************************
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******************************************************************************/
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uint32_t RTC_CompareGet(unsigned int comp);
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void RTC_CompareSet(unsigned int comp, uint32_t value);
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/***************************************************************************//**
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* @brief
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* Get RTC counter value.
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*
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* @return
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* Current RTC counter value.
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******************************************************************************/
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__STATIC_INLINE uint32_t RTC_CounterGet(void)
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{
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return(RTC->CNT);
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}
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void RTC_CounterReset(void);
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void RTC_Enable(bool enable);
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void RTC_FreezeEnable(bool enable);
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void RTC_Init(const RTC_Init_TypeDef *init);
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/***************************************************************************//**
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* @brief
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* Clear one or more pending RTC interrupts.
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*
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* @param[in] flags
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* RTC interrupt sources to clear. Use a set of interrupt flags OR-ed
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* together to clear multiple interrupt sources for the RTC module
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* (RTC_IFS_nnn).
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******************************************************************************/
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__STATIC_INLINE void RTC_IntClear(uint32_t flags)
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{
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RTC->IFC = flags;
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}
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/***************************************************************************//**
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* @brief
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* Disable one or more RTC interrupts.
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*
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* @param[in] flags
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* RTC interrupt sources to disable. Use a set of interrupt flags OR-ed
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* together to disable multiple interrupt sources for the RTC module
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* (RTC_IFS_nnn).
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******************************************************************************/
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__STATIC_INLINE void RTC_IntDisable(uint32_t flags)
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{
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RTC->IEN &= ~(flags);
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}
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/***************************************************************************//**
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* @brief
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* Enable one or more RTC interrupts.
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*
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* @note
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* Depending on the use, a pending interrupt may already be set prior to
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* enabling the interrupt. Consider using RTC_IntClear() prior to enabling
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* if such a pending interrupt should be ignored.
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*
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* @param[in] flags
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* RTC interrupt sources to enable. Use a set of interrupt flags OR-ed
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* together to set multiple interrupt sources for the RTC module
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* (RTC_IFS_nnn).
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******************************************************************************/
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__STATIC_INLINE void RTC_IntEnable(uint32_t flags)
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{
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RTC->IEN |= flags;
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}
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/***************************************************************************//**
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* @brief
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* Get pending RTC interrupt flags.
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*
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* @note
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* The event bits are not cleared by the use of this function.
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*
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* @return
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* Pending RTC interrupt sources. Returns a set of interrupt flags OR-ed
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* together for multiple interrupt sources in the RTC module (RTC_IFS_nnn).
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******************************************************************************/
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__STATIC_INLINE uint32_t RTC_IntGet(void)
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{
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return(RTC->IF);
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}
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/***************************************************************************//**
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* @brief
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* Set one or more pending RTC interrupts from SW.
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*
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* @param[in] flags
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* RTC interrupt sources to set to pending. Use a set of interrupt flags
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* OR-ed together to set multiple interrupt sources for the RTC module
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* (RTC_IFS_nnn).
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******************************************************************************/
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__STATIC_INLINE void RTC_IntSet(uint32_t flags)
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{
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RTC->IFS = flags;
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}
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void RTC_Reset(void);
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/** @} (end addtogroup RTC) */
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/** @} (end addtogroup EM_Library) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __EM_RTC_H */
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