67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
/**************************************************************************//**
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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 2.3.2
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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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#include <stdint.h>
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#include "efm32_int.h"
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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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* @brief Safe nesting interrupt disable/enable API for EFM32.
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* @details
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* This module contains functions to safely disable and enable interrupts
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* at cpu level. INT_Disable() disables interrupts and increments a lock
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* level counter. INT_Enable() decrements the lock level counter and enable
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* interrupts if the counter was decremented to zero.
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*
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* These functions would normally be used to secure critical regions.
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*
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* These functions should also be used inside interrupt handlers:
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* @verbatim
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* void SysTick_Handler(void)
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* {
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* INT_Disable();
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* .
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* .
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* .
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* INT_Enable();
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* }
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* @endverbatim
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******************************************************************************/
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/** Interrupt lock level counter. Set to zero initially as we normally enter
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* main with interrupts enabled */
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uint32_t INT_LockCnt = 0;
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/** @} (end addtogroup INT) */
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/** @} (end addtogroup EFM32_Library) */
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