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130 lines
5.3 KiB
C
130 lines
5.3 KiB
C
/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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/**@file
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*
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* @defgroup app_util_platform Utility Functions and Definitions (Platform)
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* @{
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* @ingroup app_common
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*
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* @brief Various types and definitions available to all applications when using SoftDevice.
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*/
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#ifndef APP_UTIL_PLATFORM_H__
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#define APP_UTIL_PLATFORM_H__
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#include <stdint.h>
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#include "compiler_abstraction.h"
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#include "nrf.h"
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#ifdef SOFTDEVICE_PRESENT
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#include "nrf_soc.h"
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#include "app_error.h"
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#endif
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/**@brief The interrupt priorities available to the application while the SoftDevice is active. */
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typedef enum
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{
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#ifndef SOFTDEVICE_PRESENT
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APP_IRQ_PRIORITY_HIGHEST = 0,
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#endif
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APP_IRQ_PRIORITY_HIGH = 1,
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#ifndef SOFTDEVICE_PRESENT
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APP_IRQ_PRIORITY_MID = 2,
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#endif
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APP_IRQ_PRIORITY_LOW = 3
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} app_irq_priority_t;
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#define NRF_APP_PRIORITY_THREAD 4 /**< "Interrupt level" when running in Thread Mode. */
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/**@cond NO_DOXYGEN */
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#define EXTERNAL_INT_VECTOR_OFFSET 16
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/**@endcond */
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#define PACKED(TYPE) __packed TYPE
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void critical_region_enter (void);
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void critical_region_exit (void);
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/**@brief Macro for entering a critical region.
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*
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* @note Due to implementation details, there must exist one and only one call to
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* CRITICAL_REGION_EXIT() for each call to CRITICAL_REGION_ENTER(), and they must be located
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* in the same scope.
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*/
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#ifdef SOFTDEVICE_PRESENT
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#define CRITICAL_REGION_ENTER() \
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{ \
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uint8_t IS_NESTED_CRITICAL_REGION = 0; \
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uint32_t CURRENT_INT_PRI = current_int_priority_get(); \
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if (CURRENT_INT_PRI != APP_IRQ_PRIORITY_HIGH) \
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{ \
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uint32_t ERR_CODE = sd_nvic_critical_region_enter(&IS_NESTED_CRITICAL_REGION); \
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if (ERR_CODE == NRF_ERROR_SOFTDEVICE_NOT_ENABLED) \
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{ \
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__disable_irq(); \
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} \
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else \
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{ \
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APP_ERROR_CHECK(ERR_CODE); \
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} \
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}
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#else
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#define CRITICAL_REGION_ENTER() critical_region_enter()
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#endif
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/**@brief Macro for leaving a critical region.
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*
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* @note Due to implementation details, there must exist one and only one call to
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* CRITICAL_REGION_EXIT() for each call to CRITICAL_REGION_ENTER(), and they must be located
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* in the same scope.
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*/
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#ifdef SOFTDEVICE_PRESENT
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#define CRITICAL_REGION_EXIT() \
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if (CURRENT_INT_PRI != APP_IRQ_PRIORITY_HIGH) \
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{ \
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uint32_t ERR_CODE; \
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__enable_irq(); \
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ERR_CODE = sd_nvic_critical_region_exit(IS_NESTED_CRITICAL_REGION); \
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if (ERR_CODE != NRF_ERROR_SOFTDEVICE_NOT_ENABLED) \
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{ \
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APP_ERROR_CHECK(ERR_CODE); \
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} \
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} \
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}
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#else
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#define CRITICAL_REGION_EXIT() critical_region_exit()
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#endif
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/**@brief Function for finding the current interrupt level.
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*
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* @return Current interrupt level.
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* @retval APP_IRQ_PRIORITY_HIGH We are running in Application High interrupt level.
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* @retval APP_IRQ_PRIORITY_LOW We are running in Application Low interrupt level.
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* @retval APP_IRQ_PRIORITY_THREAD We are running in Thread Mode.
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*/
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static __INLINE uint8_t current_int_priority_get(void)
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{
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uint32_t isr_vector_num = (SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk);
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if (isr_vector_num > 0)
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{
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int32_t irq_type = ((int32_t)isr_vector_num - EXTERNAL_INT_VECTOR_OFFSET);
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return (NVIC_GetPriority((IRQn_Type)irq_type) & 0xFF);
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}
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else
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{
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return NRF_APP_PRIORITY_THREAD;
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}
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}
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#endif // APP_UTIL_PLATFORM_H__
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/** @} */
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