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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs/ble_hrs.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs/ble_hrs.c | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs/ble_hrs.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs/ble_hrs.c new file mode 100644 index 0000000..58aa657 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs/ble_hrs.c @@ -0,0 +1,479 @@ +/** + * 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_HRS) +#include "ble_hrs.h" +#include <string.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 MAX_HRM_LEN (NRF_SDH_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 const * 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 const * 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 const * 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 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_hrs->hrm_handles.cccd_handle) + { + on_hrm_cccd_write(p_hrs, p_evt_write); + } +} + + +void ble_hrs_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context) +{ + ble_hrs_t * p_hrs = (ble_hrs_t *) p_context; + + 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 = 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 const * p_gatt_evt) +{ + if ( (p_hrs->conn_handle == p_gatt_evt->conn_handle) + && (p_gatt_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) + { + p_hrs->max_hrm_len = p_gatt_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH; + } +} +#endif // NRF_MODULE_ENABLED(BLE_HRS) |