227 lines
12 KiB
C
227 lines
12 KiB
C
/**
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* Copyright (c) 2012 - 2020, 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 ble_bps Blood Pressure Service
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* @{
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* @ingroup ble_sdk_srv
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* @brief Blood Pressure Service module.
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*
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* @details This module implements the Blood Pressure Service.
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*
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* If an event handler is supplied by the application, the Blood Pressure
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* Service will generate Blood Pressure Service events to the application.
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*
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* @note The application must register this module as BLE event observer using the
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* NRF_SDH_BLE_OBSERVER macro. Example:
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* @code
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* ble_bps_t instance;
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* NRF_SDH_BLE_OBSERVER(anything, BLE_BPS_BLE_OBSERVER_PRIO,
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* ble_bps_on_ble_evt, &instance);
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* @endcode
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*
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* @note Attention!
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* To maintain compliance with Nordic Semiconductor ASA Bluetooth profile
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* qualification listings, this section of source code must not be modified.
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*/
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#ifndef BLE_BPS_H__
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#define BLE_BPS_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include "ble.h"
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#include "ble_srv_common.h"
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#include "ble_date_time.h"
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#include "nrf_sdh_ble.h"
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#include "nrf_ble_gq.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**@brief Macro for defining a ble_bps instance.
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*
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* @param _name Name of the instance.
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* @hideinitializer
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*/
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#define BLE_BPS_DEF(_name) \
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static ble_bps_t _name; \
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NRF_SDH_BLE_OBSERVER(_name ## _obs, \
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BLE_BPS_BLE_OBSERVER_PRIO, \
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ble_bps_on_ble_evt, &_name)
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// Blood Pressure Feature bits
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#define BLE_BPS_FEATURE_BODY_MOVEMENT_BIT (0x01 << 0) /**< Body Movement Detection Support bit. */
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#define BLE_BPS_FEATURE_CUFF_FIT_BIT (0x01 << 1) /**< Cuff Fit Detection Support bit. */
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#define BLE_BPS_FEATURE_IRREGULAR_PULSE_BIT (0x01 << 2) /**< Irregular Pulse Detection Support bit. */
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#define BLE_BPS_FEATURE_PULSE_RATE_RANGE_BIT (0x01 << 3) /**< Pulse Rate Range Detection Support bit. */
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#define BLE_BPS_FEATURE_MEASUREMENT_POSITION_BIT (0x01 << 4) /**< Measurement Position Detection Support bit. */
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#define BLE_BPS_FEATURE_MULTIPLE_BOND_BIT (0x01 << 5) /**< Multiple Bond Support bit. */
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/**@brief Blood Pressure Service event type. */
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typedef enum
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{
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BLE_BPS_EVT_INDICATION_ENABLED, /**< Blood Pressure value indication enabled event. */
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BLE_BPS_EVT_INDICATION_DISABLED, /**< Blood Pressure value indication disabled event. */
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BLE_BPS_EVT_INDICATION_CONFIRMED /**< Confirmation of a blood pressure measurement indication has been received. */
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} ble_bps_evt_type_t;
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/**@brief Blood Pressure Service event. */
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typedef struct
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{
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ble_bps_evt_type_t evt_type; /**< Type of event. */
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} ble_bps_evt_t;
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// Forward declaration of the ble_bps_t type.
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typedef struct ble_bps_s ble_bps_t;
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/**@brief Blood Pressure Service event handler type. */
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typedef void (*ble_bps_evt_handler_t) (ble_bps_t * p_bps, ble_bps_evt_t * p_evt);
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/**@brief SFLOAT format (IEEE-11073 16-bit FLOAT, defined as a 16-bit vlue with 12-bit mantissa and
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* 4-bit exponent. */
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typedef struct
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{
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int8_t exponent; /**< Base 10 exponent, only 4 bits */
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int16_t mantissa; /**< Mantissa, only 12 bits */
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} ieee_float16_t;
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/**@brief Blood Pressure Service init structure. This contains all options and data
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* needed for initialization of the service. */
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typedef struct
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{
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ble_bps_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Blood Pressure Service. */
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ble_srv_error_handler_t error_handler; /**< Function to be called in case of an error. */
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security_req_t bp_cccd_wr_sec; /**< Security requirement for writing blood pressure measurement characteristic CCCD. */
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security_req_t bp_feature_rd_sec; /**< Security requirement for reading the blood pressure feature characteristic. */
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uint16_t feature; /**< Initial value for blood pressure feature */
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nrf_ble_gq_t * p_gatt_queue; /**< Pointer to BLE GATT Queue instance. */
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} ble_bps_init_t;
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/**@brief Blood Pressure Service structure. This contains various status information for
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* the service. */
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struct ble_bps_s
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{
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ble_bps_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the Blood Pressure Service. */
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ble_srv_error_handler_t error_handler; /**< Function to be called in case of an error. */
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uint16_t service_handle; /**< Handle of Blood Pressure Service (as provided by the BLE stack). */
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ble_gatts_char_handles_t meas_handles; /**< Handles related to the Blood Pressure Measurement characteristic. */
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ble_gatts_char_handles_t feature_handles; /**< Handles related to the Blood Pressure Feature characteristic. */
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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). */
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uint16_t feature; /**< Value of Blood Pressure feature. */
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nrf_ble_gq_t * p_gatt_queue; /**< Pointer to BLE GATT Queue instance. */
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};
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/**@brief Blood Pressure Service measurement structure. This contains a Blood Pressure
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* measurement. */
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typedef struct ble_bps_meas_s
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{
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bool blood_pressure_units_in_kpa; /**< Blood Pressure Units Flag, 0=mmHg, 1=kPa */
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bool time_stamp_present; /**< Time Stamp Flag, 0=not present, 1=present. */
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bool pulse_rate_present; /**< Pulse Rate Flag, 0=not present, 1=present. */
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bool user_id_present; /**< User ID Flag, 0=not present, 1=present. */
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bool measurement_status_present; /**< Measurement Status Flag, 0=not present, 1=present. */
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ieee_float16_t blood_pressure_systolic; /**< Blood Pressure Measurement Compound Value - Systolic. */
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ieee_float16_t blood_pressure_diastolic; /**< Blood Pressure Measurement Compound Value - Diastolic . */
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ieee_float16_t mean_arterial_pressure; /**< Blood Pressure Measurement Compound Value - Mean Arterial Pressure. */
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ble_date_time_t time_stamp; /**< Time Stamp. */
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ieee_float16_t pulse_rate; /**< Pulse Rate. */
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uint8_t user_id; /**< User ID. */
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uint16_t measurement_status; /**< Measurement Status. */
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} ble_bps_meas_t;
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/**@brief Function for initializing the Blood Pressure Service.
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*
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* @param[out] p_bps Blood Pressure Service structure. This structure will have to
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* be supplied by the application. It will be initialized by this function,
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* and will later be used to identify this particular service instance.
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* @param[in] p_bps_init Information needed to initialize the service.
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*
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* @return NRF_SUCCESS on successful initialization of service, otherwise an error code.
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*/
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uint32_t ble_bps_init(ble_bps_t * p_bps, ble_bps_init_t const * p_bps_init);
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/**@brief Function for handling the Application's BLE Stack events.
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*
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* @details Handles all events from the BLE stack of interest to the Blood Pressure Service.
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*
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* @param[in] p_ble_evt Event received from the BLE stack.
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* @param[in] p_context Blood Pressure Service structure.
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*/
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void ble_bps_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context);
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/**@brief Function for sending blood pressure measurement if indication has been enabled.
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*
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* @details The application calls this function after having performed a Blood Pressure
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* measurement. If indication has been enabled, the measurement data is encoded and
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* sent to the client.
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*
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* @param[in] p_bps Blood Pressure Service structure.
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* @param[in] p_bps_meas Pointer to new blood pressure measurement.
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*
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* @return NRF_SUCCESS on success, otherwise an error code.
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*/
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uint32_t ble_bps_measurement_send(ble_bps_t * p_bps, ble_bps_meas_t * p_bps_meas);
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/**@brief Function for checking if indication of Blood Pressure Measurement is currently enabled.
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*
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* @param[in] p_bps Blood Pressure Service structure.
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* @param[out] p_indication_enabled TRUE if indication is enabled, FALSE otherwise.
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*
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* @return NRF_SUCCESS on success, otherwise an error code.
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*/
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uint32_t ble_bps_is_indication_enabled(ble_bps_t * p_bps, bool * p_indication_enabled);
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#ifdef __cplusplus
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}
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#endif
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#endif // BLE_BPS_H__
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/** @} */
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