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Shuanglei Tao
2025-03-03 09:06:26 +08:00
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SDK/12.3.0_d7731ad/components/ble/ble_services/ble_hrs/ble_hrs.c Normal file
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/**
* Copyright (c) 2012 - 2017, 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<53>s Bluetooth profile
* qualification listings, this section of source code must not be modified.
*/
#include "sdk_common.h"
#if NRF_MODULE_ENABLED(BLE_HRS)
#include "ble_hrs.h"
#include <string.h>
#include "ble_l2cap.h"
#include "ble_srv_common.h"
#define OPCODE_LENGTH 1 /**< Length of opcode inside Heart Rate Measurement packet. */
#define HANDLE_LENGTH 2 /**< Length of handle inside Heart Rate Measurement packet. */
#define INIT_MAX_HRM_LEN (GATT_MTU_SIZE_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Heart Rate Measurement. */
#define MAX_HRM_LEN (NRF_BLE_GATT_MAX_MTU_SIZE - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Heart Rate Measurement. */
#define INITIAL_VALUE_HRM 0 /**< Initial Heart Rate Measurement value. */
// Heart Rate Measurement flag bits
#define HRM_FLAG_MASK_HR_VALUE_16BIT (0x01 << 0) /**< Heart Rate Value Format bit. */
#define HRM_FLAG_MASK_SENSOR_CONTACT_DETECTED (0x01 << 1) /**< Sensor Contact Detected bit. */
#define HRM_FLAG_MASK_SENSOR_CONTACT_SUPPORTED (0x01 << 2) /**< Sensor Contact Supported bit. */
#define HRM_FLAG_MASK_EXPENDED_ENERGY_INCLUDED (0x01 << 3) /**< Energy Expended Status bit. Feature Not Supported */
#define HRM_FLAG_MASK_RR_INTERVAL_INCLUDED (0x01 << 4) /**< RR-Interval bit. */
/**@brief Function for handling the Connect event.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_connect(ble_hrs_t * p_hrs, ble_evt_t * p_ble_evt)
{
p_hrs->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
}
/**@brief Function for handling the Disconnect event.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_disconnect(ble_hrs_t * p_hrs, ble_evt_t * p_ble_evt)
{
UNUSED_PARAMETER(p_ble_evt);
p_hrs->conn_handle = BLE_CONN_HANDLE_INVALID;
}
/**@brief Function for handling write events to the Heart Rate Measurement characteristic.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_evt_write Write event received from the BLE stack.
*/
static void on_hrm_cccd_write(ble_hrs_t * p_hrs, ble_gatts_evt_write_t * p_evt_write)
{
if (p_evt_write->len == 2)
{
// CCCD written, update notification state
if (p_hrs->evt_handler != NULL)
{
ble_hrs_evt_t evt;
if (ble_srv_is_notification_enabled(p_evt_write->data))
{
evt.evt_type = BLE_HRS_EVT_NOTIFICATION_ENABLED;
}
else
{
evt.evt_type = BLE_HRS_EVT_NOTIFICATION_DISABLED;
}
p_hrs->evt_handler(p_hrs, &evt);
}
}
}
/**@brief Function for handling the Write event.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_write(ble_hrs_t * p_hrs, ble_evt_t * p_ble_evt)
{
ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
if (p_evt_write->handle == p_hrs->hrm_handles.cccd_handle)
{
on_hrm_cccd_write(p_hrs, p_evt_write);
}
}
void ble_hrs_on_ble_evt(ble_hrs_t * p_hrs, ble_evt_t * p_ble_evt)
{
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_hrs, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnect(p_hrs, p_ble_evt);
break;
case BLE_GATTS_EVT_WRITE:
on_write(p_hrs, p_ble_evt);
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for encoding a Heart Rate Measurement.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] heart_rate Measurement to be encoded.
* @param[out] p_encoded_buffer Buffer where the encoded data will be written.
*
* @return Size of encoded data.
*/
static uint8_t hrm_encode(ble_hrs_t * p_hrs, uint16_t heart_rate, uint8_t * p_encoded_buffer)
{
uint8_t flags = 0;
uint8_t len = 1;
int i;
// Set sensor contact related flags
if (p_hrs->is_sensor_contact_supported)
{
flags |= HRM_FLAG_MASK_SENSOR_CONTACT_SUPPORTED;
}
if (p_hrs->is_sensor_contact_detected)
{
flags |= HRM_FLAG_MASK_SENSOR_CONTACT_DETECTED;
}
// Encode heart rate measurement
if (heart_rate > 0xff)
{
flags |= HRM_FLAG_MASK_HR_VALUE_16BIT;
len += uint16_encode(heart_rate, &p_encoded_buffer[len]);
}
else
{
p_encoded_buffer[len++] = (uint8_t)heart_rate;
}
// Encode rr_interval values
if (p_hrs->rr_interval_count > 0)
{
flags |= HRM_FLAG_MASK_RR_INTERVAL_INCLUDED;
}
for (i = 0; i < p_hrs->rr_interval_count; i++)
{
if (len + sizeof(uint16_t) > p_hrs->max_hrm_len)
{
// Not all stored rr_interval values can fit into the encoded hrm,
// move the remaining values to the start of the buffer.
memmove(&p_hrs->rr_interval[0],
&p_hrs->rr_interval[i],
(p_hrs->rr_interval_count - i) * sizeof(uint16_t));
break;
}
len += uint16_encode(p_hrs->rr_interval[i], &p_encoded_buffer[len]);
}
p_hrs->rr_interval_count -= i;
// Add flags
p_encoded_buffer[0] = flags;
return len;
}
/**@brief Function for adding the Heart Rate Measurement characteristic.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_hrs_init Information needed to initialize the service.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
static uint32_t heart_rate_measurement_char_add(ble_hrs_t * p_hrs,
const ble_hrs_init_t * p_hrs_init)
{
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t attr_md;
uint8_t encoded_initial_hrm[MAX_HRM_LEN];
memset(&cccd_md, 0, sizeof(cccd_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
cccd_md.write_perm = p_hrs_init->hrs_hrm_attr_md.cccd_write_perm;
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.notify = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = &cccd_md;
char_md.p_sccd_md = NULL;
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_HEART_RATE_MEASUREMENT_CHAR);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_hrs_init->hrs_hrm_attr_md.read_perm;
attr_md.write_perm = p_hrs_init->hrs_hrm_attr_md.write_perm;
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 1;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = hrm_encode(p_hrs, INITIAL_VALUE_HRM, encoded_initial_hrm);
attr_char_value.init_offs = 0;
attr_char_value.max_len = MAX_HRM_LEN;
attr_char_value.p_value = encoded_initial_hrm;
return sd_ble_gatts_characteristic_add(p_hrs->service_handle,
&char_md,
&attr_char_value,
&p_hrs->hrm_handles);
}
/**@brief Function for adding the Body Sensor Location characteristic.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_hrs_init Information needed to initialize the service.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
static uint32_t body_sensor_location_char_add(ble_hrs_t * p_hrs, const ble_hrs_init_t * p_hrs_init)
{
ble_gatts_char_md_t char_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t attr_md;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = NULL;
char_md.p_sccd_md = NULL;
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_BODY_SENSOR_LOCATION_CHAR);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_hrs_init->hrs_bsl_attr_md.read_perm;
attr_md.write_perm = p_hrs_init->hrs_bsl_attr_md.write_perm;
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = sizeof (uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len = sizeof (uint8_t);
attr_char_value.p_value = p_hrs_init->p_body_sensor_location;
return sd_ble_gatts_characteristic_add(p_hrs->service_handle,
&char_md,
&attr_char_value,
&p_hrs->bsl_handles);
}
uint32_t ble_hrs_init(ble_hrs_t * p_hrs, const ble_hrs_init_t * p_hrs_init)
{
uint32_t err_code;
ble_uuid_t ble_uuid;
// Initialize service structure
p_hrs->evt_handler = p_hrs_init->evt_handler;
p_hrs->is_sensor_contact_supported = p_hrs_init->is_sensor_contact_supported;
p_hrs->conn_handle = BLE_CONN_HANDLE_INVALID;
p_hrs->is_sensor_contact_detected = false;
p_hrs->rr_interval_count = 0;
p_hrs->max_hrm_len = INIT_MAX_HRM_LEN;
// Add service
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_HEART_RATE_SERVICE);
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
&ble_uuid,
&p_hrs->service_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Add heart rate measurement characteristic
err_code = heart_rate_measurement_char_add(p_hrs, p_hrs_init);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
if (p_hrs_init->p_body_sensor_location != NULL)
{
// Add body sensor location characteristic
err_code = body_sensor_location_char_add(p_hrs, p_hrs_init);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
}
return NRF_SUCCESS;
}
uint32_t ble_hrs_heart_rate_measurement_send(ble_hrs_t * p_hrs, uint16_t heart_rate)
{
uint32_t err_code;
// Send value if connected and notifying
if (p_hrs->conn_handle != BLE_CONN_HANDLE_INVALID)
{
uint8_t encoded_hrm[MAX_HRM_LEN];
uint16_t len;
uint16_t hvx_len;
ble_gatts_hvx_params_t hvx_params;
len = hrm_encode(p_hrs, heart_rate, encoded_hrm);
hvx_len = len;
memset(&hvx_params, 0, sizeof(hvx_params));
hvx_params.handle = p_hrs->hrm_handles.value_handle;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.offset = 0;
hvx_params.p_len = &hvx_len;
hvx_params.p_data = encoded_hrm;
err_code = sd_ble_gatts_hvx(p_hrs->conn_handle, &hvx_params);
if ((err_code == NRF_SUCCESS) && (hvx_len != len))
{
err_code = NRF_ERROR_DATA_SIZE;
}
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
}
return err_code;
}
void ble_hrs_rr_interval_add(ble_hrs_t * p_hrs, uint16_t rr_interval)
{
if (p_hrs->rr_interval_count == BLE_HRS_MAX_BUFFERED_RR_INTERVALS)
{
// The rr_interval buffer is full, delete the oldest value
memmove(&p_hrs->rr_interval[0],
&p_hrs->rr_interval[1],
(BLE_HRS_MAX_BUFFERED_RR_INTERVALS - 1) * sizeof(uint16_t));
p_hrs->rr_interval_count--;
}
// Add new value
p_hrs->rr_interval[p_hrs->rr_interval_count++] = rr_interval;
}
bool ble_hrs_rr_interval_buffer_is_full(ble_hrs_t * p_hrs)
{
return (p_hrs->rr_interval_count == BLE_HRS_MAX_BUFFERED_RR_INTERVALS);
}
uint32_t ble_hrs_sensor_contact_supported_set(ble_hrs_t * p_hrs, bool is_sensor_contact_supported)
{
// Check if we are connected to peer
if (p_hrs->conn_handle == BLE_CONN_HANDLE_INVALID)
{
p_hrs->is_sensor_contact_supported = is_sensor_contact_supported;
return NRF_SUCCESS;
}
else
{
return NRF_ERROR_INVALID_STATE;
}
}
void ble_hrs_sensor_contact_detected_update(ble_hrs_t * p_hrs, bool is_sensor_contact_detected)
{
p_hrs->is_sensor_contact_detected = is_sensor_contact_detected;
}
uint32_t ble_hrs_body_sensor_location_set(ble_hrs_t * p_hrs, uint8_t body_sensor_location)
{
ble_gatts_value_t gatts_value;
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = sizeof(uint8_t);
gatts_value.offset = 0;
gatts_value.p_value = &body_sensor_location;
return sd_ble_gatts_value_set(p_hrs->conn_handle, p_hrs->bsl_handles.value_handle, &gatts_value);
}
void ble_hrs_on_gatt_evt(ble_hrs_t * p_hrs, nrf_ble_gatt_evt_t * p_gatt_evt)
{
if (p_hrs->conn_handle == p_gatt_evt->conn_handle)
{
p_hrs->max_hrm_len = p_gatt_evt->att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
}
}
#endif // NRF_MODULE_ENABLED(BLE_HRS)

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/**
* Copyright (c) 2012 - 2017, 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_hrs Heart Rate Service
* @{
* @ingroup ble_sdk_srv
* @brief Heart Rate Service module.
*
* @details This module implements the Heart Rate Service with the Heart Rate Measurement,
* Body Sensor Location and Heart Rate Control Point characteristics.
* During initialization it adds the Heart Rate Service and Heart Rate Measurement
* characteristic to the BLE stack database. Optionally it also adds the
* Body Sensor Location and Heart Rate Control Point characteristics.
*
* If enabled, notification of the Heart Rate Measurement characteristic is performed
* when the application calls ble_hrs_heart_rate_measurement_send().
*
* The Heart Rate Service also provides a set of functions for manipulating the
* various fields in the Heart Rate Measurement characteristic, as well as setting
* the Body Sensor Location characteristic value.
*
* If an event handler is supplied by the application, the Heart Rate Service will
* generate Heart Rate Service events to the application.
*
* @note The application must propagate BLE stack events to the Heart Rate Service module by calling
* ble_hrs_on_ble_evt() from the @ref softdevice_handler callback.
*
* @note Attention!
* To maintain compliance with Nordic Semiconductor ASA Bluetooth profile
* qualification listings, this section of source code must not be modified.
*/
#ifndef BLE_HRS_H__
#define BLE_HRS_H__
#include <stdint.h>
#include <stdbool.h>
#include "ble.h"
#include "ble_srv_common.h"
#include "nrf_ble_gatt.h"
#ifdef __cplusplus
extern "C" {
#endif
// Body Sensor Location values
#define BLE_HRS_BODY_SENSOR_LOCATION_OTHER 0
#define BLE_HRS_BODY_SENSOR_LOCATION_CHEST 1
#define BLE_HRS_BODY_SENSOR_LOCATION_WRIST 2
#define BLE_HRS_BODY_SENSOR_LOCATION_FINGER 3
#define BLE_HRS_BODY_SENSOR_LOCATION_HAND 4
#define BLE_HRS_BODY_SENSOR_LOCATION_EAR_LOBE 5
#define BLE_HRS_BODY_SENSOR_LOCATION_FOOT 6
#define BLE_HRS_MAX_BUFFERED_RR_INTERVALS 20 /**< Size of RR Interval buffer inside service. */
/**@brief Heart Rate Service event type. */
typedef enum
{
BLE_HRS_EVT_NOTIFICATION_ENABLED, /**< Heart Rate value notification enabled event. */
BLE_HRS_EVT_NOTIFICATION_DISABLED /**< Heart Rate value notification disabled event. */
} ble_hrs_evt_type_t;
/**@brief Heart Rate Service event. */
typedef struct
{
ble_hrs_evt_type_t evt_type; /**< Type of event. */
} ble_hrs_evt_t;
// Forward declaration of the ble_hrs_t type.
typedef struct ble_hrs_s ble_hrs_t;
/**@brief Heart Rate Service event handler type. */
typedef void (*ble_hrs_evt_handler_t) (ble_hrs_t * p_hrs, ble_hrs_evt_t * p_evt);
/**@brief Heart Rate Service init structure. This contains all options and data needed for
* initialization of the service. */
typedef struct
{
ble_hrs_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Heart Rate Service. */
bool is_sensor_contact_supported; /**< Determines if sensor contact detection is to be supported. */
uint8_t * p_body_sensor_location; /**< If not NULL, initial value of the Body Sensor Location characteristic. */
ble_srv_cccd_security_mode_t hrs_hrm_attr_md; /**< Initial security level for heart rate service measurement attribute */
ble_srv_security_mode_t hrs_bsl_attr_md; /**< Initial security level for body sensor location attribute */
} ble_hrs_init_t;
/**@brief Heart Rate Service structure. This contains various status information for the service. */
struct ble_hrs_s
{
ble_hrs_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Heart Rate Service. */
bool is_expended_energy_supported; /**< TRUE if Expended Energy measurement is supported. */
bool is_sensor_contact_supported; /**< TRUE if sensor contact detection is supported. */
uint16_t service_handle; /**< Handle of Heart Rate Service (as provided by the BLE stack). */
ble_gatts_char_handles_t hrm_handles; /**< Handles related to the Heart Rate Measurement characteristic. */
ble_gatts_char_handles_t bsl_handles; /**< Handles related to the Body Sensor Location characteristic. */
ble_gatts_char_handles_t hrcp_handles; /**< Handles related to the Heart Rate Control Point characteristic. */
uint16_t conn_handle; /**< Handle of the current connection (as provided by the BLE stack, is BLE_CONN_HANDLE_INVALID if not in a connection). */
bool is_sensor_contact_detected; /**< TRUE if sensor contact has been detected. */
uint16_t rr_interval[BLE_HRS_MAX_BUFFERED_RR_INTERVALS]; /**< Set of RR Interval measurements since the last Heart Rate Measurement transmission. */
uint16_t rr_interval_count; /**< Number of RR Interval measurements since the last Heart Rate Measurement transmission. */
uint8_t max_hrm_len; /**< Current maximum HR measurement length, adjusted according to the current ATT MTU. */
};
/**@brief Function for initializing the Heart Rate Service.
*
* @param[out] p_hrs Heart Rate 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_hrs_init Information needed to initialize the service.
*
* @return NRF_SUCCESS on successful initialization of service, otherwise an error code.
*/
uint32_t ble_hrs_init(ble_hrs_t * p_hrs, const ble_hrs_init_t * p_hrs_init);
/**@brief Function for handling the GATT module's events.
*
* @details Handles all events from the GATT module of interest to the Heart Rate Service.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_gatt_evt Event received from the GATT module.
*/
void ble_hrs_on_gatt_evt(ble_hrs_t * p_hrs, nrf_ble_gatt_evt_t * p_gatt_evt);
/**@brief Function for handling the Application's BLE Stack events.
*
* @details Handles all events from the BLE stack of interest to the Heart Rate Service.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
void ble_hrs_on_ble_evt(ble_hrs_t * p_hrs, ble_evt_t * p_ble_evt);
/**@brief Function for sending heart rate measurement if notification has been enabled.
*
* @details The application calls this function after having performed a heart rate measurement.
* If notification has been enabled, the heart rate measurement data is encoded and sent to
* the client.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] heart_rate New heart rate measurement.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
uint32_t ble_hrs_heart_rate_measurement_send(ble_hrs_t * p_hrs, uint16_t heart_rate);
/**@brief Function for adding a RR Interval measurement to the RR Interval buffer.
*
* @details All buffered RR Interval measurements will be included in the next heart rate
* measurement message, up to the maximum number of measurements that will fit into the
* message. If the buffer is full, the oldest measurement in the buffer will be deleted.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] rr_interval New RR Interval measurement (will be buffered until the next
* transmission of Heart Rate Measurement).
*/
void ble_hrs_rr_interval_add(ble_hrs_t * p_hrs, uint16_t rr_interval);
/**@brief Function for checking if RR Interval buffer is full.
*
* @param[in] p_hrs Heart Rate Service structure.
*
* @return true if RR Interval buffer is full, false otherwise.
*/
bool ble_hrs_rr_interval_buffer_is_full(ble_hrs_t * p_hrs);
/**@brief Function for setting the state of the Sensor Contact Supported bit.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] is_sensor_contact_supported New state of the Sensor Contact Supported bit.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
uint32_t ble_hrs_sensor_contact_supported_set(ble_hrs_t * p_hrs, bool is_sensor_contact_supported);
/**@brief Function for setting the state of the Sensor Contact Detected bit.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] is_sensor_contact_detected TRUE if sensor contact is detected, FALSE otherwise.
*/
void ble_hrs_sensor_contact_detected_update(ble_hrs_t * p_hrs, bool is_sensor_contact_detected);
/**@brief Function for setting the Body Sensor Location.
*
* @details Sets a new value of the Body Sensor Location characteristic. The new value will be sent
* to the client the next time the client reads the Body Sensor Location characteristic.
*
* @param[in] p_hrs Heart Rate Service structure.
* @param[in] body_sensor_location New Body Sensor Location.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
uint32_t ble_hrs_body_sensor_location_set(ble_hrs_t * p_hrs, uint8_t body_sensor_location);
#ifdef __cplusplus
}
#endif
#endif // BLE_HRS_H__
/** @} */