| /***************************************************************************//** |
| * @file em_int.c |
| * @brief Interrupt enable/disable unit API |
| * @version 5.6.0 |
| ****************************************************************************** |
| * # License |
| * <b>Copyright 2016 Silicon Laboratories, Inc. 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. |
| * 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 the CPU level. INT_Disable() disables interrupts globally and increments a lock |
| * level counter (counting semaphore). INT_Enable() decrements the lock level |
| * counter and enables 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 |
| ******************************************************************************/ |
| |
| /** An interrupt lock level counter. Set to zero initially because main is |
| * normally entered with interrupts enabled. */ |
| uint32_t INT_LockCnt = 0; |
| |
| /** @} (end addtogroup INT) */ |
| /** @} (end addtogroup emlib) */ |
