111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
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/***************************************************************************//**
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* @file
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* @brief Interrupt enable/disable unit API for EFM32.
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* @author Energy Micro AS
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* @version 2.0.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2011 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_INT_H
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#define __EFM32_INT_H
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#include "efm32.h"
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extern uint32_t INT_LockCnt;
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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 INT
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @brief
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* Disable interrupts.
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*
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* @return
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* The resulting interrupt nesting level.
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*
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* @details
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* Disable interrupts and increment lock level counter.
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*
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******************************************************************************/
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static __INLINE uint32_t INT_Disable(void)
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{
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__disable_irq();
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if (INT_LockCnt < UINT32_MAX)
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{
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INT_LockCnt++;
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}
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return INT_LockCnt;
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}
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/***************************************************************************//**
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* @brief
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* Enable interrupts.
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*
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* @return
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* The resulting interrupt nesting level.
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*
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* @details
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* Decrement interrupt lock level counter and enable interrupts if counter
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* reached zero.
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*
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******************************************************************************/
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static __INLINE uint32_t INT_Enable(void)
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{
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uint32_t retVal;
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if (INT_LockCnt > 0)
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{
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INT_LockCnt--;
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retVal = INT_LockCnt;
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if (retVal == 0)
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{
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__enable_irq();
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}
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return retVal;
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}
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else
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{
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return 0;
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}
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}
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/** @} (end addtogroup INT) */
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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_INT_H */
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