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TARGET_NRF51_DK/TOOLCHAIN_GCC_ARM/ble_db_discovery.h
- Committer:
- AnnaBridge
- Date:
- 2019-02-20
- Revision:
- 172:65be27845400
- Parent:
- 171:3a7713b1edbc
File content as of revision 172:65be27845400:
/* * Copyright (c) 2013 Nordic Semiconductor ASA * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA * integrated circuit in a product or a software update for such product, must reproduce * the above copyright notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be * used to endorse or promote products derived from this software without specific prior * written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary or object form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /**@file * * @defgroup ble_sdk_lib_db_discovery Database Discovery * @{ * @ingroup ble_sdk_lib * @brief Database discovery module. * * @details This module contains the APIs and types exposed by the DB Discovery module. These APIs * and types can be used by the application to perform discovery of a service and its * characteristics at the peer server. This module can also be used to discover the * desired services in multiple remote devices. * * @warning The maximum number of characteristics per service that can be discovered by this module * is determined by the number of characteristics in the service structure defined in * db_disc_config.h. If the peer has more than the supported number of characteristics, then * the first found will be discovered and any further characteristics will be ignored. No * descriptors other than Client Characteristic Configuration Descriptors will be searched * for at the peer. * * @note Presently only one instance of a Primary Service can be discovered by this module. If * there are multiple instances of the service at the peer, only the first instance * of it at the peer is fetched and returned to the application. * * @note The application must propagate BLE stack events to this module by calling * ble_db_discovery_on_ble_evt(). * */ #ifndef BLE_DB_DISCOVERY_H__ #define BLE_DB_DISCOVERY_H__ #include <stdint.h> #include "nrf_ble_gattc.h" #include "nrf_ble.h" #include "nrf_error.h" #include "ble_srv_common.h" #include "ble_gatt_db.h" #define BLE_DB_DISCOVERY_MAX_SRV 6 /**< Maximum number of services supported by this module. This also indicates the maximum number of users allowed to be registered to this module. (one user per service). */ /**@brief Type of the DB Discovery event. */ typedef enum { BLE_DB_DISCOVERY_COMPLETE, /**< Event indicating that the GATT Database discovery is complete. */ BLE_DB_DISCOVERY_ERROR, /**< Event indicating that an internal error has occurred in the DB Discovery module. This could typically be because of the SoftDevice API returning an error code during the DB discover.*/ BLE_DB_DISCOVERY_SRV_NOT_FOUND, /**< Event indicating that the service was not found at the peer.*/ BLE_DB_DISCOVERY_AVAILABLE /**< Event indicating that the DB discovery module is available.*/ } ble_db_discovery_evt_type_t; /**@brief Structure for holding the information related to the GATT database at the server. * * @details This module identifies a remote database. Use one instance of this structure per * connection. * * @warning This structure must be zero-initialized. */ typedef struct { ble_gatt_db_srv_t services[BLE_DB_DISCOVERY_MAX_SRV]; /**< Information related to the current service being discovered. This is intended for internal use during service discovery.*/ uint8_t srv_count; /**< Number of services at the peers GATT database.*/ uint8_t curr_char_ind; /**< Index of the current characteristic being discovered. This is intended for internal use during service discovery.*/ uint8_t curr_srv_ind; /**< Index of the current service being discovered. This is intended for internal use during service discovery.*/ bool discovery_in_progress; /**< Variable to indicate if there is a service discovery in progress. */ uint8_t discoveries_count; /**< Number of service discoveries made, both successful and unsuccessful. */ uint16_t conn_handle; /**< Connection handle on which the discovery is started*/ } ble_db_discovery_t; /**@brief Structure containing the event from the DB discovery module to the application. */ typedef struct { ble_db_discovery_evt_type_t evt_type; /**< Type of event. */ uint16_t conn_handle; /**< Handle of the connection for which this event has occurred. */ union { ble_gatt_db_srv_t discovered_db; /**< Structure containing the information about the GATT Database at the server. This will be filled when the event type is @ref BLE_DB_DISCOVERY_COMPLETE.*/ uint32_t err_code; /**< nRF Error code indicating the type of error which occurred in the DB Discovery module. This will be filled when the event type is @ref BLE_DB_DISCOVERY_ERROR. */ } params; } ble_db_discovery_evt_t; /**@brief DB Discovery event handler type. */ typedef void (* ble_db_discovery_evt_handler_t)(ble_db_discovery_evt_t * p_evt); /**@brief Function for initializing the DB Discovery module. * * @param[in] evt_handler Event handler to be called by the DB discovery module when any event * related to discovery of the registered service occurs. * * @retval NRF_SUCCESS On successful initialization. * @retval NRF_ERROR_NULL If the handler was NULL. */ uint32_t ble_db_discovery_init(ble_db_discovery_evt_handler_t evt_handler); /**@brief Function for closing the DB Discovery module. * * @details This function will clear up any internal variables and states maintained by the * module. To re-use the module after calling this function, the function @ref * ble_db_discovery_init must be called again. * * @retval NRF_SUCCESS Operation success. */ uint32_t ble_db_discovery_close(void); /**@brief Function for registering with the DB Discovery module. * * @details The application can use this function to inform which service it is interested in * discovering at the server. * * @param[in] p_uuid Pointer to the UUID of the service to be discovered at the server. * * @note The total number of services that can be discovered by this module is @ref * BLE_DB_DISCOVERY_MAX_SRV. This effectively means that the maximum number of * registrations possible is equal to the @ref BLE_DB_DISCOVERY_MAX_SRV. * * @retval NRF_SUCCESS Operation success. * @retval NRF_ERROR_NULL When a NULL pointer is passed as input. * @retval NRF_ERROR_INVALID_STATE If this function is called without calling the * @ref ble_db_discovery_init. * @retval NRF_ERROR_NO_MEM The maximum number of registrations allowed by this module * has been reached. */ uint32_t ble_db_discovery_evt_register(const ble_uuid_t * const p_uuid); /**@brief Function for starting the discovery of the GATT database at the server. * * @warning p_db_discovery structure must be zero-initialized. * * @param[out] p_db_discovery Pointer to the DB Discovery structure. * @param[in] conn_handle The handle of the connection for which the discovery should be * started. * * @retval NRF_SUCCESS Operation success. * @retval NRF_ERROR_NULL When a NULL pointer is passed as input. * @retval NRF_ERROR_INVALID_STATE If this function is called without calling the * @ref ble_db_discovery_init, or without calling * @ref ble_db_discovery_evt_register. * @retval NRF_ERROR_BUSY If a discovery is already in progress for the current * connection. * * @return This API propagates the error code returned by the * SoftDevice API @ref sd_ble_gattc_primary_services_discover. */ uint32_t ble_db_discovery_start(ble_db_discovery_t * const p_db_discovery, uint16_t conn_handle); /**@brief Function for handling the Application's BLE Stack events. * * @param[in,out] p_db_discovery Pointer to the DB Discovery structure. * @param[in] p_ble_evt Pointer to the BLE event received. */ void ble_db_discovery_on_ble_evt(ble_db_discovery_t * const p_db_discovery, const ble_evt_t * const p_ble_evt); #endif // BLE_DB_DISCOVERY_H__ /** @} */