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162 lines
8.6 KiB
C
162 lines
8.6 KiB
C
/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*/
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/** @file
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*
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* @defgroup ble_sdk_srv_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 propagate BLE stack events to the Blood Pressure Service
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* module by calling ble_bps_on_ble_evt() from the @ref softdevice_handler function.
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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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// 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_cccd_security_mode_t bps_meas_attr_md; /**< Initial security level for blood pressure measurement attribute */
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ble_srv_security_mode_t bps_feature_attr_md; /**< Initial security level for blood pressure feature attribute */
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uint16_t feature; /**< Initial value for blood pressure feature */
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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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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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};
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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, const ble_bps_init_t * 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_bps Blood Pressure Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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void ble_bps_on_ble_evt(ble_bps_t * p_bps, ble_evt_t * p_ble_evt);
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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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#endif // BLE_BPS_H__
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/** @} */
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