/**************************************************************************//** | |
* @file em_int.c | |
* @brief Interrupt enable/disable unit API | |
* @version 5.1.2 | |
****************************************************************************** | |
* @section License | |
* <b>Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com</b> | |
******************************************************************************* | |
* | |
* Permission is granted to anyone to use this software for any purpose, | |
* including commercial applications, and to alter it and redistribute it | |
* freely, subject to the following restrictions: | |
* | |
* 1. The origin of this software must not be misrepresented; you must not | |
* claim that you wrote the original software. | |
* 2. Altered source versions must be plainly marked as such, and must not be | |
* misrepresented as being the original software. | |
* 3. This notice may not be removed or altered from any source distribution. | |
* | |
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no | |
* obligation to support this Software. Silicon Labs 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. | |
* | |
* Silicon Labs 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. | |
* | |
******************************************************************************/ | |
#include <stdint.h> | |
#include "em_int.h" | |
/***************************************************************************//** | |
* @addtogroup emlib | |
* @{ | |
******************************************************************************/ | |
/***************************************************************************//** | |
* @addtogroup INT | |
* @brief Safe nesting of interrupt disable/enable API | |
* @{ | |
* @deprecated | |
* These functions are deprecated and marked for removal in a later release. | |
* Please use the @ref CORE module instead. See @ref core_porting for | |
* information on how to convert existing code bases to use @ref CORE. | |
* | |
* @details | |
* This module contains functions to safely disable and enable interrupts | |
* at CPU level. INT_Disable() disables interrupts globally and increments a lock | |
* level counter (counting semaphore). INT_Enable() decrements the lock level | |
* counter and enable interrupts if the counter reaches zero. | |
* | |
* These functions would normally be used to secure critical regions, and | |
* to make sure that a critical section that calls into another critical | |
* section does not unintentionally terminate the callee critical section. | |
* | |
* These functions should also be used inside interrupt handlers: | |
* @verbatim | |
* void SysTick_Handler(void) | |
* { | |
* INT_Disable(); | |
* . | |
* . | |
* . | |
* INT_Enable(); | |
* } | |
* @endverbatim | |
******************************************************************************/ | |
/** Interrupt lock level counter. Set to zero initially as we normally enter | |
* main with interrupts enabled */ | |
uint32_t INT_LockCnt = 0; | |
/** @} (end addtogroup INT) */ | |
/** @} (end addtogroup emlib) */ |