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- /**
- * Copyright (c) 2012 - 2020, 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_HTS)
- #include "ble_err.h"
- #include "ble_hts.h"
- #include <string.h>
- #include "ble_srv_common.h"
- #define OPCODE_LENGTH 1 /**< Length of opcode inside Health Thermometer Measurement packet. */
- #define HANDLE_LENGTH 2 /**< Length of handle inside Health Thermometer Measurement packet. */
- #define MAX_HTM_LEN (BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Health Thermometer Measurement. */
- // Health Thermometer Measurement flag bits
- #define HTS_MEAS_FLAG_TEMP_UNITS_BIT (0x01 << 0) /**< Temperature Units flag. */
- #define HTS_MEAS_FLAG_TIME_STAMP_BIT (0x01 << 1) /**< Time Stamp flag. */
- #define HTS_MEAS_FLAG_TEMP_TYPE_BIT (0x01 << 2) /**< Temperature Type flag. */
- /**@brief Function for interception of GATT errors and @ref nrf_ble_gq errors.
- *
- * @param[in] nrf_error Error code.
- * @param[in] p_ctx Parameter from the event handler.
- * @param[in] conn_handle Connection handle.
- */
- static void gatt_error_handler(uint32_t nrf_error,
- void * p_ctx,
- uint16_t conn_handle)
- {
- ble_hts_t * p_hts = (ble_hts_t *)p_ctx;
- if (p_hts->error_handler != NULL)
- {
- p_hts->error_handler(nrf_error);
- }
- }
- /**@brief Function for handling the Connect event.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_connect(ble_hts_t * p_hts, ble_evt_t const * p_ble_evt)
- {
- ret_code_t err_code;
- p_hts->conn_handle = p_ble_evt->evt.gatts_evt.conn_handle;
- err_code = nrf_ble_gq_conn_handle_register(p_hts->p_gatt_queue, p_hts->conn_handle);
- if ((p_hts->error_handler != NULL) &&
- (err_code != NRF_SUCCESS))
- {
- p_hts->error_handler(err_code);
- }
- }
- /**@brief Function for handling the Disconnect event.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_disconnect(ble_hts_t * p_hts, ble_evt_t const * p_ble_evt)
- {
- UNUSED_PARAMETER(p_ble_evt);
- p_hts->conn_handle = BLE_CONN_HANDLE_INVALID;
- }
- /**@brief Function for handling write events to the Blood Pressure Measurement characteristic.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_evt_write Write event received from the BLE stack.
- */
- static void on_cccd_write(ble_hts_t * p_hts, ble_gatts_evt_write_t const * p_evt_write)
- {
- if (p_evt_write->len == 2)
- {
- // CCCD written, update indication state
- if (p_hts->evt_handler != NULL)
- {
- ble_hts_evt_t evt;
- if (ble_srv_is_indication_enabled(p_evt_write->data))
- {
- evt.evt_type = BLE_HTS_EVT_INDICATION_ENABLED;
- }
- else
- {
- evt.evt_type = BLE_HTS_EVT_INDICATION_DISABLED;
- }
- p_hts->evt_handler(p_hts, &evt);
- }
- }
- }
- /**@brief Function for handling the Write event.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_write(ble_hts_t * p_hts, 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_hts->meas_handles.cccd_handle)
- {
- on_cccd_write(p_hts, p_evt_write);
- }
- }
- /**@brief Function for handling the HVC event.
- *
- * @details Handles HVC events from the BLE stack.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_hvc(ble_hts_t * p_hts, 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_hts->meas_handles.value_handle)
- {
- ble_hts_evt_t evt;
- evt.evt_type = BLE_HTS_EVT_INDICATION_CONFIRMED;
- p_hts->evt_handler(p_hts, &evt);
- }
- }
- void ble_hts_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
- {
- ble_hts_t * p_hts = (ble_hts_t *)p_context;
- switch (p_ble_evt->header.evt_id)
- {
- case BLE_GAP_EVT_CONNECTED:
- on_connect(p_hts, p_ble_evt);
- break;
- case BLE_GAP_EVT_DISCONNECTED:
- on_disconnect(p_hts, p_ble_evt);
- break;
- case BLE_GATTS_EVT_WRITE:
- on_write(p_hts, p_ble_evt);
- break;
- case BLE_GATTS_EVT_HVC:
- on_hvc(p_hts, p_ble_evt);
- break;
- default:
- // No implementation needed.
- break;
- }
- }
- /**@brief Function for encoding a Health Thermometer Measurement.
- *
- * @param[in] p_hts Health Thermometer Service structure.
- * @param[in] p_hts_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 hts_measurement_encode(ble_hts_t * p_hts,
- ble_hts_meas_t * p_hts_meas,
- uint8_t * p_encoded_buffer)
- {
- uint8_t flags = 0;
- uint8_t len = 1;
- uint32_t encoded_temp;
- // Flags field
- if (p_hts_meas->temp_in_fahr_units)
- {
- flags |= HTS_MEAS_FLAG_TEMP_UNITS_BIT;
- }
- if (p_hts_meas->time_stamp_present)
- {
- flags |= HTS_MEAS_FLAG_TIME_STAMP_BIT;
- }
- // Temperature Measurement Value field
- if (p_hts_meas->temp_in_fahr_units)
- {
- flags |= HTS_MEAS_FLAG_TEMP_UNITS_BIT;
- encoded_temp = ((p_hts_meas->temp_in_fahr.exponent << 24) & 0xFF000000) |
- ((p_hts_meas->temp_in_fahr.mantissa << 0) & 0x00FFFFFF);
- }
- else
- {
- encoded_temp = ((p_hts_meas->temp_in_celcius.exponent << 24) & 0xFF000000) |
- ((p_hts_meas->temp_in_celcius.mantissa << 0) & 0x00FFFFFF);
- }
- len += uint32_encode(encoded_temp, &p_encoded_buffer[len]);
- // Time Stamp field
- if (p_hts_meas->time_stamp_present)
- {
- flags |= HTS_MEAS_FLAG_TIME_STAMP_BIT;
- len += ble_date_time_encode(&p_hts_meas->time_stamp, &p_encoded_buffer[len]);
- }
- // Temperature Type field
- if (p_hts_meas->temp_type_present)
- {
- flags |= HTS_MEAS_FLAG_TEMP_TYPE_BIT;
- p_encoded_buffer[len++] = p_hts_meas->temp_type;
- }
- // Flags field
- p_encoded_buffer[0] = flags;
- return len;
- }
- uint32_t ble_hts_init(ble_hts_t * p_hts, ble_hts_init_t const * p_hts_init)
- {
- VERIFY_PARAM_NOT_NULL(p_hts);
- VERIFY_PARAM_NOT_NULL(p_hts_init);
- VERIFY_PARAM_NOT_NULL(p_hts_init->p_gatt_queue);
- uint32_t err_code;
- uint8_t init_value[MAX_HTM_LEN];
- ble_hts_meas_t initial_htm;
- ble_uuid_t ble_uuid;
- ble_add_char_params_t add_char_params;
- // Initialize service structure
- p_hts->evt_handler = p_hts_init->evt_handler;
- p_hts->p_gatt_queue = p_hts_init->p_gatt_queue;
- p_hts->error_handler = p_hts_init->error_handler;
- p_hts->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_hts->temp_type = p_hts_init->temp_type;
- // Add service
- BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_HEALTH_THERMOMETER_SERVICE);
- err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_hts->service_handle);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- // Add measurement characteristic
- memset(&add_char_params, 0, sizeof(add_char_params));
- memset(&initial_htm, 0, sizeof(initial_htm));
- add_char_params.uuid = BLE_UUID_TEMPERATURE_MEASUREMENT_CHAR;
- add_char_params.init_len = hts_measurement_encode(p_hts, &initial_htm, init_value);
- add_char_params.max_len = MAX_HTM_LEN;
- add_char_params.p_init_value = init_value;
- add_char_params.is_var_len = true;
- add_char_params.char_props.indicate = 1;
- add_char_params.cccd_write_access = p_hts_init->ht_meas_cccd_wr_sec;
- err_code = characteristic_add(p_hts->service_handle, &add_char_params, &p_hts->meas_handles);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- // Add temperature type characteristic
- if (p_hts_init->temp_type_as_characteristic)
- {
- memset(&add_char_params, 0, sizeof(add_char_params));
- add_char_params.uuid = BLE_UUID_TEMPERATURE_TYPE_CHAR;
- add_char_params.max_len = sizeof(uint8_t);
- add_char_params.char_props.read = 1;
- add_char_params.read_access = p_hts_init->ht_type_rd_sec;
- add_char_params.init_len = sizeof(uint8_t);
- add_char_params.p_init_value = (uint8_t *) &(p_hts_init->temp_type);
- err_code = characteristic_add(p_hts->service_handle,
- &add_char_params,
- &p_hts->temp_type_handles);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- }
- return NRF_SUCCESS;
- }
- uint32_t ble_hts_measurement_send(ble_hts_t * p_hts, ble_hts_meas_t * p_hts_meas)
- {
- uint32_t err_code;
- // Send value if connected
- if (p_hts->conn_handle != BLE_CONN_HANDLE_INVALID)
- {
- uint8_t encoded_hts_meas[MAX_HTM_LEN];
- uint16_t len;
- nrf_ble_gq_req_t hts_req;
- len = hts_measurement_encode(p_hts, p_hts_meas, encoded_hts_meas);
- memset(&hts_req, 0, sizeof(nrf_ble_gq_req_t));
- hts_req.type = NRF_BLE_GQ_REQ_GATTS_HVX;
- hts_req.error_handler.cb = gatt_error_handler;
- hts_req.error_handler.p_ctx = p_hts;
- hts_req.params.gatts_hvx.handle = p_hts->meas_handles.value_handle;
- hts_req.params.gatts_hvx.offset = 0;
- hts_req.params.gatts_hvx.p_data = encoded_hts_meas;
- hts_req.params.gatts_hvx.p_len = &len;
- hts_req.params.gatts_hvx.type = BLE_GATT_HVX_INDICATION;
- err_code = nrf_ble_gq_item_add(p_hts->p_gatt_queue, &hts_req, p_hts->conn_handle);
- }
- else
- {
- err_code = NRF_ERROR_INVALID_STATE;
- }
- return err_code;
- }
- uint32_t ble_hts_is_indication_enabled(ble_hts_t * p_hts, 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_hts->conn_handle,
- p_hts->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_HTS)
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