306 lines
13 KiB
C
306 lines
13 KiB
C
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/**
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* Copyright (c) 2017 - 2018, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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*
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* @defgroup nrf_sdh SoftDevice Handler
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* @{
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* @ingroup app_common
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* @brief API for initializing and disabling the SoftDevice.
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*/
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#ifndef NRF_SDH_H__
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#define NRF_SDH_H__
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#include <stdbool.h>
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#include "sdk_config.h"
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#include "sdk_errors.h"
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#include "nrf_section_iter.h"
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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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* @name Softdevice Handler dispatch models
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* @{
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* @ingroup nrf_sdh */
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/**@brief SoftDevice events are passed to the application from the interrupt context. */
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#define NRF_SDH_DISPATCH_MODEL_INTERRUPT 0
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/**@brief SoftDevice events are passed to the application using @ref app_scheduler.
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*
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* @note @ref app_scheduler must be initialized before enabling the SoftDevice handler.
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*/
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#define NRF_SDH_DISPATCH_MODEL_APPSH 1
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/**@brief SoftDevice events are polled manually using @ref nrf_sdh_evts_poll().
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*
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* @note In this mode, a user application can also implement SD_EVT_IRQHandler() to receive a
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* notification about incoming events.
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*/
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#define NRF_SDH_DISPATCH_MODEL_POLLING 2
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/** @} */
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/**
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* @name SoftDevice Handler state change requests
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* @{
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* @ingroup nrf_sdh */
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/**@brief SoftDevice Handler state requests. */
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typedef enum
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{
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NRF_SDH_EVT_ENABLE_REQUEST, //!< Request to enable the SoftDevice.
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NRF_SDH_EVT_DISABLE_REQUEST, //!< Request to disable the SoftDevice.
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} nrf_sdh_req_evt_t;
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/**@brief SoftDevice Handler state request handler.
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*
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* @retval true If ready for the SoftDevice to change state.
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* @retval false If not ready for the SoftDevice to change state.
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* If false is returned, the state change is aborted.
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*/
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typedef bool (*nrf_sdh_req_evt_handler_t)(nrf_sdh_req_evt_t request, void * p_context);
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/**@brief SoftDevice Handler state request observer. */
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typedef struct
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{
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nrf_sdh_req_evt_handler_t handler; //!< Request handler.
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void * p_context; //!< A parameter to the handler function.
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} const nrf_sdh_req_observer_t;
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/**@brief Macro for registering a SoftDevice state change request observer.
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*
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* An observer of SoftDevice state change requests receives requests to change the state of the
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* SoftDevice from enabled to disabled and vice versa. These requests may or may not be acknowledged
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* by the observer, depending on the value returned by its request handler function. Thus, a
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* request observer has the capability to defer the change of state of the SoftDevice. If it does
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* so, it has the responsibility to call @ref nrf_sdh_request_continue when it is ready to let the
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* SoftDevice change its state. If such capability is not necessary and you only need to be informed
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* about changes of the SoftDevice state, use the @ref NRF_SDH_STATE_OBSERVER macro instead.
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*
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* @note This macro places the observer in a section named "sdh_req_observers".
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*
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* @param[in] _observer Name of the observer.
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* @param[in] _prio Priority of the observer's event handler.
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* The smaller the number, the higher the priority.
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* @hideinitializer
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*/
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#define NRF_SDH_REQUEST_OBSERVER(_observer, _prio) \
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STATIC_ASSERT(NRF_SDH_ENABLED, "NRF_SDH_ENABLED not set!"); \
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STATIC_ASSERT(_prio < NRF_SDH_REQ_OBSERVER_PRIO_LEVELS, "Priority level unavailable."); \
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/*lint -esym(528,*_observer) -esym(529,*_observer) : Symbol not referenced. */ \
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NRF_SECTION_SET_ITEM_REGISTER(sdh_req_observers, _prio, nrf_sdh_req_observer_t const _observer)
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/** @} */
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/**
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* @name SoftDevice Handler state events
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* @{
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* @ingroup nrf_sdh */
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/**@brief SoftDevice Handler state events. */
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typedef enum
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{
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NRF_SDH_EVT_STATE_ENABLE_PREPARE, //!< SoftDevice is going to be enabled.
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NRF_SDH_EVT_STATE_ENABLED, //!< SoftDevice is enabled.
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NRF_SDH_EVT_STATE_DISABLE_PREPARE, //!< SoftDevice is going to be disabled.
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NRF_SDH_EVT_STATE_DISABLED, //!< SoftDevice is disabled.
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} nrf_sdh_state_evt_t;
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/**@brief SoftDevice Handler state event handler. */
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typedef void (*nrf_sdh_state_evt_handler_t)(nrf_sdh_state_evt_t state, void * p_context);
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/**@brief SoftDevice Handler state observer. */
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typedef struct
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{
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nrf_sdh_state_evt_handler_t handler; //!< State event handler.
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void * p_context; //!< A parameter to the event handler.
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} const nrf_sdh_state_observer_t;
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/**@brief Macro for registering a SoftDevice state observer.
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*
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* A SoftDevice state observer receives events when the SoftDevice state has changed or is
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* about to change. These events are only meant to inform the state observer, which, contrary
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* to a state change request observer, does not have the capability to defer the change of state.
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* If such capability is required, use the @ref NRF_SDH_REQUEST_OBSERVER macro instead.
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*
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* This macro places the observer in a section named "sdh_state_observers".
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*
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* @param[in] _observer Name of the observer.
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* @param[in] _prio Priority of the observer's event handler.
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* The smaller the number, the higher the priority.
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* @hideinitializer
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*/
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#define NRF_SDH_STATE_OBSERVER(_observer, _prio) \
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STATIC_ASSERT(NRF_SDH_ENABLED, "NRF_SDH_ENABLED not set!"); \
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STATIC_ASSERT(_prio < NRF_SDH_STATE_OBSERVER_PRIO_LEVELS, "Priority level unavailable."); \
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/*lint -esym(528,*_observer) -esym(529,*_observer) : Symbol not referenced. */ \
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NRF_SECTION_SET_ITEM_REGISTER(sdh_state_observers, _prio, static nrf_sdh_state_observer_t const _observer)
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/** @} */
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/**
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* @name SoftDevice stack events
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* @{
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* @ingroup nrf_sdh */
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/**@brief SoftDevice stack event handler. */
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typedef void (*nrf_sdh_stack_evt_handler_t)(void * p_evt);
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/**@brief SoftDevice stack event observer. */
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typedef struct
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{
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nrf_sdh_stack_evt_handler_t handler; //!< SoftDevice event handler.
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void * p_context; //!< A parameter to the event handler.
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} const nrf_sdh_stack_observer_t;
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/**@brief Macro for registering a SoftDevice stack events observer.
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*
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* A SoftDevice stack event observer receives all events from the SoftDevice. These events can be
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* either BLE, ANT, or SoC events. If you need to receive BLE, ANT, or SoC events separately, use the
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* @ref NRF_SDH_BLE_OBSERVER, @ref NRF_SDH_ANT_OBSERVER, or @ref NRF_SDH_SOC_OBSERVER macros
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* respectively.
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*
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* @note This macro places the observer in a section named "sdh_stack_observers".
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*
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* @param[in] _observer Name of the observer.
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* @param[in] _prio Priority of the observer's event handler.
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* The smaller the number, the higher the priority.
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** @hideinitializer
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*/
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#define NRF_SDH_STACK_OBSERVER(_observer, _prio) \
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STATIC_ASSERT(NRF_SDH_ENABLED, "NRF_SDH_ENABLED not set!"); \
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STATIC_ASSERT(_prio < NRF_SDH_STACK_OBSERVER_PRIO_LEVELS, "Priority level unavailable."); \
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/*lint -esym(528,*_observer) -esym(529,*_observer) : Symbol not referenced. */ \
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NRF_SECTION_SET_ITEM_REGISTER(sdh_stack_observers, _prio, static nrf_sdh_stack_observer_t const _observer)
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/** @} */
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/**@brief Function for requesting to enable the SoftDevice.
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*
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* This function issues a @ref NRF_SDH_EVT_ENABLE_REQUEST request to all observers that
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* were registered using the @ref NRF_SDH_REQUEST_OBSERVER macro. The observers may or
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* may not acknowledge the request. If all observers acknowledge the request, the
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* SoftDevice will be enabled. Otherwise, the process will be stopped and the observers
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* that did not acknowledge have the responsibility to restart it by calling
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* @ref nrf_sdh_request_continue when they are ready for the SoftDevice to change state.
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*
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* @retval NRF_SUCCESS The process is started.
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* @retval NRF_ERROR_INVALID_STATE The SoftDevice is already enabled.
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*/
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ret_code_t nrf_sdh_enable_request(void);
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/**@brief Function for requesting to disable the SoftDevice.
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*
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* This function issues a @ref NRF_SDH_EVT_DISABLE_REQUEST request to all observers that
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* were registered using the @ref NRF_SDH_REQUEST_OBSERVER macro. The observers may or
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* may not acknowledge the request. If all observers acknowledge the request, the
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* SoftDevice will be disabled. Otherwise, the process will be stopped and the observers
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* that did not acknowledge have the responsibility to restart it by calling
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* @ref nrf_sdh_request_continue when they are ready for the SoftDevice to change state.
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*
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* @retval NRF_SUCCESS The process is started.
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* @retval NRF_ERROR_INVALID_STATE The SoftDevice is already disabled.
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*/
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ret_code_t nrf_sdh_disable_request(void);
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/**@brief Function for restarting the SoftDevice Enable/Disable process.
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*
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* Modules which did not acknowledge a @ref NRF_SDH_EVT_ENABLE_REQUEST or
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* @ref NRF_SDH_EVT_DISABLE_REQUEST request must call this function to restart the
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* SoftDevice state change process.
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*
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* @retval NRF_SUCCESS The process is restarted.
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* @retval NRF_ERROR_INVALID_STATE No state change request was pending.
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*/
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ret_code_t nrf_sdh_request_continue(void);
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/**@brief Function for retrieving the SoftDevice state.
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*
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* @retval true If the SoftDevice is enabled.
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* @retval false If the SoftDevice is disabled.
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*/
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bool nrf_sdh_is_enabled(void);
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/**@brief Function for stopping the incoming stack events.
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*
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* This function disables the SoftDevice interrupt. To resume polling for events,
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* call @ref nrf_sdh_resume.
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*/
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void nrf_sdh_suspend(void);
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/**@brief Function for resuming polling incoming events from the SoftDevice. */
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void nrf_sdh_resume(void);
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/**@brief Function for retrieving the information about the module state.
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*
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* @retval true The SoftDevice handler is paused, and it will not fetch events from the stack.
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* @retval false The SoftDevice handler is running, and it will fetch and dispatch events from
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* the stack to the registered stack observers.
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*/
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bool nrf_sdh_is_suspended(void);
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/**@brief Function for polling stack events from the SoftDevice.
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*
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* The events are passed to the application using the registered event handlers.
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*
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* @note @ref NRF_SDH_DISPATCH_MODEL_POLLING must be selected to use this function.
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*/
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void nrf_sdh_evts_poll(void);
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#ifdef __cplusplus
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}
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#endif
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#endif // NRF_SDH_H__
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/** @} */
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