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2025-08-19 09:49:41 +08:00
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components/ble/ble_services/ble_ias/ble_ias.c Normal file
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/**
* Copyright (c) 2012 - 2020, 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 form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
*
*/
/* Attention!
* To maintain compliance with Nordic Semiconductor ASA's Bluetooth profile
* qualification listings, this section of source code must not be modified.
*/
#include "sdk_common.h"
#if NRF_MODULE_ENABLED(BLE_IAS)
#include "ble_ias.h"
#include <string.h>
#include "ble_srv_common.h"
#define NRF_LOG_MODULE_NAME ble_ias
#if BLE_IAS_CONFIG_LOG_ENABLED
#define NRF_LOG_LEVEL BLE_IAS_CONFIG_LOG_LEVEL
#define NRF_LOG_INFO_COLOR BLE_IAS_CONFIG_INFO_COLOR
#define NRF_LOG_DEBUG_COLOR BLE_IAS_CONFIG_DEBUG_COLOR
#else // BLE_IAS_CONFIG_LOG_ENABLED
#define NRF_LOG_LEVEL 0
#endif // BLE_IAS_CONFIG_LOG_ENABLED
#include "nrf_log.h"
NRF_LOG_MODULE_REGISTER();
#define INITIAL_ALERT_LEVEL BLE_CHAR_ALERT_LEVEL_NO_ALERT
/**@brief Function for handling the Connect event.
*
* @param[in] p_ias Immediate Alert Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_connect(ble_ias_t * p_ias, ble_evt_t const * p_ble_evt)
{
ret_code_t err_code;
ble_ias_client_context_t * p_client = NULL;
err_code = blcm_link_ctx_get(p_ias->p_link_ctx_storage,
p_ble_evt->evt.gap_evt.conn_handle,
(void *) &p_client);
if (err_code != NRF_SUCCESS)
{
NRF_LOG_ERROR("Link context for 0x%02X connection handle could not be fetched.",
p_ble_evt->evt.gap_evt.conn_handle);
}
else
{
p_client->alert_level = INITIAL_ALERT_LEVEL;
}
}
/**@brief Function for handling the Write event.
*
* @param[in] p_ias Immediate Alert Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_write(ble_ias_t * p_ias, ble_evt_t const * p_ble_evt)
{
ble_gatts_evt_write_t const * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
if ((p_evt_write->handle == p_ias->alert_level_handles.value_handle) && (p_evt_write->len == 1))
{
// Alert level written, call application event handler
ret_code_t err_code;
ble_ias_evt_t evt;
ble_ias_client_context_t * p_client;
err_code = blcm_link_ctx_get(p_ias->p_link_ctx_storage,
p_ble_evt->evt.gatts_evt.conn_handle,
(void *) &p_client);
if (err_code != NRF_SUCCESS)
{
NRF_LOG_ERROR("Link context for 0x%02X connection handle could not be fetched.",
p_ble_evt->evt.gatts_evt.conn_handle);
}
else
{
p_client->alert_level = p_evt_write->data[0];
}
evt.evt_type = BLE_IAS_EVT_ALERT_LEVEL_UPDATED;
evt.conn_handle = p_ble_evt->evt.gatts_evt.conn_handle;
evt.p_link_ctx = p_client;
p_ias->evt_handler(p_ias, &evt);
}
}
void ble_ias_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
{
ble_ias_t * p_ias = (ble_ias_t *)p_context;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_ias, p_ble_evt);
break;
case BLE_GATTS_EVT_WRITE:
on_write(p_ias, p_ble_evt);
break;
default:
// No implementation needed.
break;
}
}
uint32_t ble_ias_init(ble_ias_t * p_ias, const ble_ias_init_t * p_ias_init)
{
uint32_t err_code;
uint8_t initial_alert_level;
ble_uuid_t ble_uuid;
ble_add_char_params_t add_char_params;
// Initialize service structure
if (p_ias_init->evt_handler == NULL)
{
return NRF_ERROR_INVALID_PARAM;
}
p_ias->evt_handler = p_ias_init->evt_handler;
// Add service
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_IMMEDIATE_ALERT_SERVICE);
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
&ble_uuid,
&p_ias->service_handle);
VERIFY_SUCCESS(err_code);
// Add alert level characteristic
initial_alert_level = INITIAL_ALERT_LEVEL;
memset(&add_char_params, 0, sizeof(add_char_params));
add_char_params.uuid = BLE_UUID_ALERT_LEVEL_CHAR;
add_char_params.max_len = sizeof (uint8_t);
add_char_params.init_len = sizeof (uint8_t);
add_char_params.p_init_value = &initial_alert_level;
add_char_params.char_props.write_wo_resp = 1;
add_char_params.write_access = p_ias_init->alert_wr_sec;
return characteristic_add(p_ias->service_handle,
&add_char_params,
&p_ias->alert_level_handles);
}
uint32_t ble_ias_alert_level_get(ble_ias_t * p_ias, uint16_t conn_handle, uint8_t * p_alert_level)
{
ret_code_t err_code;
ble_ias_client_context_t * p_client;
err_code = blcm_link_ctx_get(p_ias->p_link_ctx_storage, conn_handle, (void *) &p_client);
VERIFY_SUCCESS(err_code);
*p_alert_level = p_client->alert_level;
return NRF_SUCCESS;
}
#endif // NRF_MODULE_ENABLED(BLE_IAS)

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/**
* Copyright (c) 2012 - 2020, 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 form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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_ias Immediate Alert Service
* @{
* @ingroup ble_sdk_srv
* @brief Immediate Alert Service module.
*
* @details This module implements the Immediate Alert Service with the Alert Level characteristic.
* During initialization it adds the Immediate Alert Service and Alert Level characteristic
* to the BLE stack database.
*
* The application must supply an event handler for receiving Immediate Alert Service
* events. Using this handler, the service will notify the application when the
* Alert Level characteristic value changes.
*
* The service also provides a function for letting the application poll the current
* value of the Alert Level characteristic.
*
* @note The application must register this module as BLE event observer using the
* NRF_SDH_BLE_OBSERVER macro. Example:
* @code
* ble_ias_t instance;
* NRF_SDH_BLE_OBSERVER(anything, BLE_IAS_BLE_OBSERVER_PRIO,
* ble_ias_on_ble_evt, &instance);
* @endcode
*
* @note Attention!
* To maintain compliance with Nordic Semiconductor ASA Bluetooth profile
* qualification listings, this section of source code must not be modified.
*/
#ifndef BLE_IAS_H__
#define BLE_IAS_H__
#include <stdint.h>
#include "ble.h"
#include "nrf_sdh_ble.h"
#include "ble_link_ctx_manager.h"
#include "ble_srv_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/**@brief Macro for defining a ble_ias instance.
*
* @param _name Name of the instance.
* @param[in] _ias_max_clients Maximum number of IAS clients connected at a time.
* @hideinitializer
*/
#define BLE_IAS_DEF(_name, _ias_max_clients) \
BLE_LINK_CTX_MANAGER_DEF(CONCAT_2(_name, _link_ctx_storage), \
(_ias_max_clients), \
sizeof(ble_ias_client_context_t)); \
static ble_ias_t _name = \
{ \
.p_link_ctx_storage = &CONCAT_2(_name, _link_ctx_storage) \
}; \
NRF_SDH_BLE_OBSERVER(_name ## _obs, \
BLE_IAS_BLE_OBSERVER_PRIO, \
ble_ias_on_ble_evt, \
&_name)
/**@brief Immediate Alert Service event type. */
typedef enum
{
BLE_IAS_EVT_ALERT_LEVEL_UPDATED /**< Alert Level Updated event. */
} ble_ias_evt_type_t;
/**@brief Immediate Alert Service client context structure.
*
* @details This structure contains state context related to hosts.
*/
typedef struct
{
uint8_t alert_level; /**< New Alert Level value. */
} ble_ias_client_context_t;
/**@brief Immediate Alert Service event. */
typedef struct
{
ble_ias_evt_type_t evt_type; /**< Type of event. */
uint16_t conn_handle; /**< Connection handle. */
ble_ias_client_context_t * p_link_ctx; /**< A pointer to the link context. */
} ble_ias_evt_t;
// Forward declaration of the ble_ias_t type.
typedef struct ble_ias_s ble_ias_t;
/**@brief Immediate Alert Service event handler type. */
typedef void (*ble_ias_evt_handler_t) (ble_ias_t * p_ias, ble_ias_evt_t * p_evt);
/**@brief Immediate Alert Service init structure. This contains all options and data needed for
* initialization of the service. */
typedef struct
{
ble_ias_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Immediate Alert Service. */
security_req_t alert_wr_sec; /**< Security requirement for writing Alert Level characteristic. */
} ble_ias_init_t;
/**@brief Immediate Alert Service structure. This contains various status information for the
* service. */
struct ble_ias_s
{
ble_ias_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Immediate Alert Service. */
uint16_t service_handle; /**< Handle of Immediate Alert Service (as provided by the BLE stack). */
ble_gatts_char_handles_t alert_level_handles; /**< Handles related to the Alert Level characteristic. */
blcm_link_ctx_storage_t * const p_link_ctx_storage; /**< Pointer to link context storage with handles of all current connections and its context. */
};
/**@brief Function for initializing the Immediate Alert Service.
*
* @param[out] p_ias Immediate Alert Service structure. This structure will have to be
* supplied by the application. It will be initialized by this function,
* and will later be used to identify this particular service instance.
* @param[in] p_ias_init Information needed to initialize the service.
*
* @return NRF_SUCCESS on successful initialization of service, otherwise an error code.
*/
uint32_t ble_ias_init(ble_ias_t * p_ias, const ble_ias_init_t * p_ias_init);
/**@brief Function for handling the Application's BLE Stack events.
*
* @details Handles all events from the BLE stack of interest to the Immediate Alert Service.
*
* @param[in] p_ble_evt Event received from the BLE stack.
* @param[in] p_context Immediate Alert Service structure.
*/
void ble_ias_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context);
/**@brief Function for getting value of the Alert Level characteristic.
*
* @param[in] p_ias Immediate Alert Service structure.
* @param[in] conn_handle Connection handle of the destination client.
* @param[out] p_alert_level Alert Level value which has been set by the specific client.
*/
uint32_t ble_ias_alert_level_get(ble_ias_t * p_ias, uint16_t conn_handle, uint8_t * p_alert_level);
#ifdef __cplusplus
}
#endif
#endif // BLE_IAS_H__
/** @} */