105 lines
3.7 KiB
C
105 lines
3.7 KiB
C
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/***************************************************************************//**
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* @file
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* @brief Energy management unit (EMU) peripheral API for EFM32.
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* @author Energy Micro AS
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* @version 1.3.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* This source code is the property of Energy Micro AS. The source and compiled
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* code may only be used on Energy Micro "EFM32" microcontrollers.
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*
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* This copyright notice may not be removed from the source code nor changed.
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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 __EFM32_EMU_H
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#define __EFM32_EMU_H
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#include <stdbool.h>
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#include "efm32.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 EFM32_Library
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup EMU
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* @{
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******************************************************************************/
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/*******************************************************************************
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***************************** PROTOTYPES **********************************
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******************************************************************************/
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/***************************************************************************//**
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* @brief
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* Enter energy mode 1 (EM1).
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******************************************************************************/
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static __INLINE void EMU_EnterEM1(void)
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{
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/* Just enter Cortex-M3 sleep mode */
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SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
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__WFI();
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}
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void EMU_EnterEM2(bool restore);
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void EMU_EnterEM3(bool restore);
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void EMU_EnterEM4(void);
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/***************************************************************************//**
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* @brief
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* Lock the EMU in order to protect all its registers against unintended
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* modification.
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*
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* @note
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* If locking the EMU registers, they must be unlocked prior to using any
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* EMU API functions modifying EMU registers. An exception to this is the
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* energy mode entering API (EMU_EnterEMn()), which can be used when the
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* EMU registers are locked.
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******************************************************************************/
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static __INLINE void EMU_Lock(void)
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{
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EMU->LOCK = EMU_LOCK_LOCKKEY_LOCK;
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}
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void EMU_MemPwrDown(uint32_t blocks);
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/***************************************************************************//**
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* @brief
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* Unlock the EMU so that writing to locked registers again is possible.
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******************************************************************************/
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static __INLINE void EMU_Unlock(void)
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{
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EMU->LOCK = EMU_LOCK_LOCKKEY_UNLOCK;
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}
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void EMU_UpdateOscConfig(void);
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/** @} (end addtogroup EMU) */
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/** @} (end addtogroup EFM32_Library) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __EFM32_EMU_H */
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