diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_bps/ble_bps.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_bps/ble_bps.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_bps/ble_bps.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_bps/ble_bps.c new file mode 100644 index 0000000..c96bad1 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_bps/ble_bps.c @@ -0,0 +1,475 @@ +/** + * Copyright (c) 2012 - 2018, 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_BPS) +#include "ble_bps.h" +#include "ble_err.h" +#include <string.h> +#include "nordic_common.h" +#include "ble_srv_common.h" + + +#define OPCODE_LENGTH 1 /**< Length of opcode inside Blood Pressure Measurement packet. */ +#define HANDLE_LENGTH 2 /**< Length of handle inside Blood Pressure Measurement packet. */ +#define MAX_BPM_LEN (BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Blood Pressure Measurement. */ + +// Blood Pressure Measurement Flags bits +#define BPS_MEAS_BLOOD_PRESSURE_UNITS_FLAG_BIT (0x01 << 0) /**< Blood Pressure Units Flag bit. */ +#define BPS_MEAS_TIME_STAMP_FLAG_BIT (0x01 << 1) /**< Time Stamp Flag bit. */ +#define BPS_MEAS_PULSE_RATE_FLAG_BIT (0x01 << 2) /**< Pulse Rate Flag bit. */ +#define BPS_MEAS_USER_ID_FLAG_BIT (0x01 << 3) /**< User ID Flag bit. */ +#define BPS_MEAS_MEASUREMENT_STATUS_FLAG_BIT (0x01 << 4) /**< Measurement Status Flag bit. */ + + +/**@brief Function for handling the Connect event. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_ble_evt Event received from the BLE stack. + */ +static void on_connect(ble_bps_t * p_bps, ble_evt_t const * p_ble_evt) +{ + p_bps->conn_handle = p_ble_evt->evt.gatts_evt.conn_handle; +} + + +/**@brief Function for handling the Disconnect event. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_ble_evt Event received from the BLE stack. + */ +static void on_disconnect(ble_bps_t * p_bps, ble_evt_t const * p_ble_evt) +{ + UNUSED_PARAMETER(p_ble_evt); + p_bps->conn_handle = BLE_CONN_HANDLE_INVALID; +} + + +/**@brief Function for handling the write events to the Blood Pressure Measurement characteristic. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_evt_write Write event received from the BLE stack. + */ +static void on_cccd_write(ble_bps_t * p_bps, ble_gatts_evt_write_t const * p_evt_write) +{ + if (p_evt_write->len == 2) + { + // CCCD written, update indication state + if (p_bps->evt_handler != NULL) + { + ble_bps_evt_t evt; + + if (ble_srv_is_indication_enabled(p_evt_write->data)) + { + evt.evt_type = BLE_BPS_EVT_INDICATION_ENABLED; + } + else + { + evt.evt_type = BLE_BPS_EVT_INDICATION_DISABLED; + } + + p_bps->evt_handler(p_bps, &evt); + } + } +} + + +/**@brief Function for handling the Write event. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_ble_evt Event received from the BLE stack. + */ +static void on_write(ble_bps_t * p_bps, 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_bps->meas_handles.cccd_handle) + { + on_cccd_write(p_bps, p_evt_write); + } +} + + +/**@brief Function for handling the HVC event. + * + * @details Handles HVC events from the BLE stack. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_ble_evt Event received from the BLE stack. + */ +static void on_hvc(ble_bps_t * p_bps, ble_evt_t const * p_ble_evt) +{ + ble_gatts_evt_hvc_t const * p_hvc = &p_ble_evt->evt.gatts_evt.params.hvc; + + if (p_hvc->handle == p_bps->meas_handles.value_handle) + { + ble_bps_evt_t evt; + + evt.evt_type = BLE_BPS_EVT_INDICATION_CONFIRMED; + p_bps->evt_handler(p_bps, &evt); + } +} + + +void ble_bps_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context) +{ + ble_bps_t * p_bps = (ble_bps_t *)p_context; + + switch (p_ble_evt->header.evt_id) + { + case BLE_GAP_EVT_CONNECTED: + on_connect(p_bps, p_ble_evt); + break; + + case BLE_GAP_EVT_DISCONNECTED: + on_disconnect(p_bps, p_ble_evt); + break; + + case BLE_GATTS_EVT_WRITE: + on_write(p_bps, p_ble_evt); + break; + + case BLE_GATTS_EVT_HVC: + on_hvc(p_bps, p_ble_evt); + break; + + default: + // No implementation needed. + break; + } +} + + +/**@brief Function for encoding a Blood Pressure Measurement. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_bps_meas 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 bps_measurement_encode(ble_bps_t * p_bps, + ble_bps_meas_t * p_bps_meas, + uint8_t * p_encoded_buffer) +{ + uint8_t flags = 0; + uint8_t len = 1; + uint16_t encoded_sfloat; + + // Set measurement units flag + if (p_bps_meas->blood_pressure_units_in_kpa) + { + flags |= BPS_MEAS_BLOOD_PRESSURE_UNITS_FLAG_BIT; + } + + // Blood Pressure Measurement - Systolic + encoded_sfloat = ((p_bps_meas->blood_pressure_systolic.exponent << 12) & 0xF000) | + ((p_bps_meas->blood_pressure_systolic.mantissa << 0) & 0x0FFF); + len += uint16_encode(encoded_sfloat, &p_encoded_buffer[len]); + + // Blood Pressure Measurement - Diastolic + encoded_sfloat = ((p_bps_meas->blood_pressure_diastolic.exponent << 12) & 0xF000) | + ((p_bps_meas->blood_pressure_diastolic.mantissa << 0) & 0x0FFF); + len += uint16_encode(encoded_sfloat, &p_encoded_buffer[len]); + + // Blood Pressure Measurement - Mean Arterial Pressure + encoded_sfloat = ((p_bps_meas->mean_arterial_pressure.exponent << 12) & 0xF000) | + ((p_bps_meas->mean_arterial_pressure.mantissa << 0) & 0x0FFF); + len += uint16_encode(encoded_sfloat, &p_encoded_buffer[len]); + + // Time Stamp field + if (p_bps_meas->time_stamp_present) + { + flags |= BPS_MEAS_TIME_STAMP_FLAG_BIT; + len += ble_date_time_encode(&p_bps_meas->time_stamp, &p_encoded_buffer[len]); + } + + // Pulse Rate + if (p_bps_meas->pulse_rate_present) + { + flags |= BPS_MEAS_PULSE_RATE_FLAG_BIT; + + encoded_sfloat = ((p_bps_meas->pulse_rate.exponent << 12) & 0xF000) | + ((p_bps_meas->pulse_rate.mantissa << 0) & 0x0FFF); + len += uint16_encode(encoded_sfloat, &p_encoded_buffer[len]); + } + + // User ID + if (p_bps_meas->user_id_present) + { + flags |= BPS_MEAS_USER_ID_FLAG_BIT; + p_encoded_buffer[len++] = p_bps_meas->user_id; + } + + // Measurement Status + if (p_bps_meas->measurement_status_present) + { + flags |= BPS_MEAS_MEASUREMENT_STATUS_FLAG_BIT; + len += uint16_encode(p_bps_meas->measurement_status, &p_encoded_buffer[len]); + } + + // Flags field + p_encoded_buffer[0] = flags; + + return len; +} + + +/**@brief Function for adding Blood Pressure Measurement characteristics. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_bps_init Information needed to initialize the service. + * + * @return NRF_SUCCESS on success, otherwise an error code. + */ +static uint32_t bps_measurement_char_add(ble_bps_t * p_bps, ble_bps_init_t const * p_bps_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; + ble_bps_meas_t initial_bpm; + uint8_t encoded_bpm[MAX_BPM_LEN]; + + memset(&cccd_md, 0, sizeof(cccd_md)); + + BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm); + cccd_md.vloc = BLE_GATTS_VLOC_STACK; + cccd_md.write_perm = p_bps_init->bps_meas_attr_md.cccd_write_perm; + + memset(&char_md, 0, sizeof(char_md)); + + char_md.char_props.indicate = 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_BLOOD_PRESSURE_MEASUREMENT_CHAR); + + memset(&attr_md, 0, sizeof(attr_md)); + + attr_md.vloc = BLE_GATTS_VLOC_STACK; + attr_md.read_perm = p_bps_init->bps_meas_attr_md.read_perm; + attr_md.write_perm = p_bps_init->bps_meas_attr_md.write_perm; + attr_md.rd_auth = 0; + attr_md.wr_auth = 0; + attr_md.vlen = 1; + + memset(&attr_char_value, 0, sizeof(attr_char_value)); + memset(&initial_bpm, 0, sizeof(initial_bpm)); + + attr_char_value.p_uuid = &ble_uuid; + attr_char_value.p_attr_md = &attr_md; + attr_char_value.init_len = bps_measurement_encode(p_bps, &initial_bpm, encoded_bpm); + attr_char_value.init_offs = 0; + attr_char_value.max_len = MAX_BPM_LEN; + attr_char_value.p_value = encoded_bpm; + + return sd_ble_gatts_characteristic_add(p_bps->service_handle, + &char_md, + &attr_char_value, + &p_bps->meas_handles); +} + + +/**@brief Function for adding Blood Pressure Feature characteristics. + * + * @param[in] p_bps Blood Pressure Service structure. + * @param[in] p_bps_init Information needed to initialize the service. + * + * @return NRF_SUCCESS on success, otherwise an error code. + */ +static uint32_t bps_feature_char_add(ble_bps_t * p_bps, ble_bps_init_t const * p_bps_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; + uint8_t init_value_encoded[2]; + uint8_t init_value_len; + + 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_BLOOD_PRESSURE_FEATURE_CHAR); + + memset(&attr_md, 0, sizeof(attr_md)); + + attr_md.vloc = BLE_GATTS_VLOC_STACK; + attr_md.read_perm = p_bps_init->bps_feature_attr_md.read_perm; + attr_md.write_perm = p_bps_init->bps_feature_attr_md.write_perm; + attr_md.rd_auth = 0; + attr_md.wr_auth = 0; + attr_md.vlen = 0; + + memset(&attr_char_value, 0, sizeof(attr_char_value)); + + init_value_len = uint16_encode(p_bps_init->feature, init_value_encoded); + + attr_char_value.p_uuid = &ble_uuid; + attr_char_value.p_attr_md = &attr_md; + attr_char_value.init_len = init_value_len; + attr_char_value.init_offs = 0; + attr_char_value.max_len = init_value_len; + attr_char_value.p_value = init_value_encoded; + + return sd_ble_gatts_characteristic_add(p_bps->service_handle, + &char_md, + &attr_char_value, + &p_bps->feature_handles); +} + + +uint32_t ble_bps_init(ble_bps_t * p_bps, ble_bps_init_t const * p_bps_init) +{ + uint32_t err_code; + ble_uuid_t ble_uuid; + + // Initialize service structure + p_bps->evt_handler = p_bps_init->evt_handler; + p_bps->conn_handle = BLE_CONN_HANDLE_INVALID; + p_bps->feature = p_bps_init->feature; + + // Add service + BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_BLOOD_PRESSURE_SERVICE); + + err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_bps->service_handle); + if (err_code != NRF_SUCCESS) + { + return err_code; + } + + // Add measurement characteristic + err_code = bps_measurement_char_add(p_bps, p_bps_init); + if (err_code != NRF_SUCCESS) + { + return err_code; + } + + // Add feature characteristic + err_code = bps_feature_char_add(p_bps, p_bps_init); + if (err_code != NRF_SUCCESS) + { + return err_code; + } + + return NRF_SUCCESS; +} + + +uint32_t ble_bps_measurement_send(ble_bps_t * p_bps, ble_bps_meas_t * p_bps_meas) +{ + uint32_t err_code; + + // Send value if connected + if (p_bps->conn_handle != BLE_CONN_HANDLE_INVALID) + { + uint8_t encoded_bps_meas[MAX_BPM_LEN]; + uint16_t len; + uint16_t hvx_len; + ble_gatts_hvx_params_t hvx_params; + + len = bps_measurement_encode(p_bps, p_bps_meas, encoded_bps_meas); + hvx_len = len; + + memset(&hvx_params, 0, sizeof(hvx_params)); + + hvx_params.handle = p_bps->meas_handles.value_handle; + hvx_params.type = BLE_GATT_HVX_INDICATION; + hvx_params.offset = 0; + hvx_params.p_len = &hvx_len; + hvx_params.p_data = encoded_bps_meas; + + err_code = sd_ble_gatts_hvx(p_bps->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; +} + + +uint32_t ble_bps_is_indication_enabled(ble_bps_t * p_bps, bool * p_indication_enabled) +{ + uint32_t err_code; + uint8_t cccd_value_buf[BLE_CCCD_VALUE_LEN]; + ble_gatts_value_t gatts_value; + + // Initialize value struct. + memset(&gatts_value, 0, sizeof(gatts_value)); + + gatts_value.len = BLE_CCCD_VALUE_LEN; + gatts_value.offset = 0; + gatts_value.p_value = cccd_value_buf; + + err_code = sd_ble_gatts_value_get(p_bps->conn_handle, + p_bps->meas_handles.cccd_handle, + &gatts_value); + + if (err_code == NRF_SUCCESS) + { + *p_indication_enabled = ble_srv_is_indication_enabled(cccd_value_buf); + } + if (err_code == BLE_ERROR_GATTS_SYS_ATTR_MISSING) + { + *p_indication_enabled = false; + return NRF_SUCCESS; + } + return err_code; +} +#endif // NRF_MODULE_ENABLED(BLE_BPS) |