/** * 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_HTS) #include "ble_err.h" #include "ble_hts.h" #include #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 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) { p_hts->conn_handle = p_ble_evt->evt.gatts_evt.conn_handle; } /**@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; } /**@brief Function for adding Health Thermometer Measurement characteristics. * * @param[in] p_hts Health Thermometer Service structure. * @param[in] p_hts_init Information needed to initialize the service. * * @return NRF_SUCCESS on success, otherwise an error code. */ static uint32_t hts_measurement_char_add(ble_hts_t * p_hts, ble_hts_init_t const * p_hts_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_hts_meas_t initial_htm; uint8_t encoded_htm[MAX_HTM_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_hts_init->hts_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_TEMPERATURE_MEASUREMENT_CHAR); memset(&attr_md, 0, sizeof(attr_md)); attr_md.vloc = BLE_GATTS_VLOC_STACK; attr_md.read_perm = p_hts_init->hts_meas_attr_md.read_perm; attr_md.write_perm = p_hts_init->hts_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_htm, 0, sizeof(initial_htm)); attr_char_value.p_uuid = &ble_uuid; attr_char_value.p_attr_md = &attr_md; attr_char_value.init_len = hts_measurement_encode(p_hts, &initial_htm, encoded_htm); attr_char_value.init_offs = 0; attr_char_value.max_len = MAX_HTM_LEN; attr_char_value.p_value = encoded_htm; return sd_ble_gatts_characteristic_add(p_hts->service_handle, &char_md, &attr_char_value, &p_hts->meas_handles); } /**@brief Function for adding Temperature Type characteristics. * * @param[in] p_hts Health Thermometer Service structure. * @param[in] p_hts_init Information needed to initialize the service. * * @return NRF_SUCCESS on success, otherwise an error code. */ static uint32_t hts_temp_type_char_add(ble_hts_t * p_hts, ble_hts_init_t const * p_hts_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_temp_type; uint8_t init_value_encoded[1]; 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_TEMPERATURE_TYPE_CHAR); memset(&attr_md, 0, sizeof(attr_md)); attr_md.vloc = BLE_GATTS_VLOC_STACK; attr_md.read_perm = p_hts_init->hts_temp_type_attr_md.read_perm; attr_md.write_perm = p_hts_init->hts_temp_type_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_temp_type = p_hts_init->temp_type; init_value_encoded[0] = init_value_temp_type; 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 = init_value_encoded; return sd_ble_gatts_characteristic_add(p_hts->service_handle, &char_md, &attr_char_value, &p_hts->temp_type_handles); } uint32_t ble_hts_init(ble_hts_t * p_hts, ble_hts_init_t const * p_hts_init) { uint32_t err_code; ble_uuid_t ble_uuid; // Initialize service structure p_hts->evt_handler = p_hts_init->evt_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 err_code = hts_measurement_char_add(p_hts, p_hts_init); if (err_code != NRF_SUCCESS) { return err_code; } // Add temperature type characteristic if (p_hts_init->temp_type_as_characteristic) { err_code = hts_temp_type_char_add(p_hts, p_hts_init); 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; uint16_t hvx_len; ble_gatts_hvx_params_t hvx_params; len = hts_measurement_encode(p_hts, p_hts_meas, encoded_hts_meas); hvx_len = len; memset(&hvx_params, 0, sizeof(hvx_params)); hvx_params.handle = p_hts->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_hts_meas; err_code = sd_ble_gatts_hvx(p_hts->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_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)