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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_RSCS) #include "ble_rscs.h" #include #include "ble.h" #include "ble_srv_common.h" #define OPCODE_LENGTH 1 /**< Length of opcode inside Running Speed and Cadence Measurement packet. */ #define HANDLE_LENGTH 2 /**< Length of handle inside Running Speed and Cadence Measurement packet. */ #define MAX_RSCM_LEN (BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Running Speed and Cadence Measurement. */ // Running Speed and Cadence Measurement flag bits #define RSC_MEAS_FLAG_INSTANT_STRIDE_LEN_PRESENT (0x01 << 0) /**< Instantaneous Stride Length Present flag bit. */ #define RSC_MEAS_FLAG_TOTAL_DISTANCE_PRESENT (0x01 << 1) /**< Total Distance Present flag bit. */ #define RSC_MEAS_FLAG_WALKING_OR_RUNNING_BIT (0x01 << 2) /**< Walking or Running Status flag bit. */ /**@brief Function for handling the Connect event. * * @param[in] p_rscs Running Speed and Cadence Service structure. * @param[in] p_ble_evt Event received from the BLE stack. */ static void on_connect(ble_rscs_t * p_rscs, ble_evt_t const * p_ble_evt) { p_rscs->conn_handle = p_ble_evt->evt.gap_evt.conn_handle; } /**@brief Function for handling the Disconnect event. * * @param[in] p_rscs Running Speed and Cadence Service structure. * @param[in] p_ble_evt Event received from the BLE stack. */ static void on_disconnect(ble_rscs_t * p_rscs, ble_evt_t const * p_ble_evt) { UNUSED_PARAMETER(p_ble_evt); p_rscs->conn_handle = BLE_CONN_HANDLE_INVALID; } /**@brief Function for handling the write events to the RSCS Measurement characteristic. * * @param[in] p_rscs Running Speed and Cadence Service structure. * @param[in] p_evt_write Write event received from the BLE stack. */ static void on_meas_cccd_write(ble_rscs_t * p_rscs, ble_gatts_evt_write_t const * p_evt_write) { if (p_evt_write->len == 2) { // CCCD written, update notification state if (p_rscs->evt_handler != NULL) { ble_rscs_evt_t evt; if (ble_srv_is_notification_enabled(p_evt_write->data)) { evt.evt_type = BLE_RSCS_EVT_NOTIFICATION_ENABLED; } else { evt.evt_type = BLE_RSCS_EVT_NOTIFICATION_DISABLED; } p_rscs->evt_handler(p_rscs, &evt); } } } /**@brief Function for handling the Write event. * * @param[in] p_rscs Running Speed and Cadence Service structure. * @param[in] p_ble_evt Event received from the BLE stack. */ static void on_write(ble_rscs_t * p_rscs, 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_rscs->meas_handles.cccd_handle) { on_meas_cccd_write(p_rscs, p_evt_write); } } void ble_rscs_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context) { if ((p_context == NULL) || (p_ble_evt == NULL)) { return; } ble_rscs_t * p_rscs = (ble_rscs_t *)p_context; switch (p_ble_evt->header.evt_id) { case BLE_GAP_EVT_CONNECTED: on_connect(p_rscs, p_ble_evt); break; case BLE_GAP_EVT_DISCONNECTED: on_disconnect(p_rscs, p_ble_evt); break; case BLE_GATTS_EVT_WRITE: on_write(p_rscs, p_ble_evt); break; default: // No implementation needed. break; } } /**@brief Function for encoding a RSCS Measurement. * * @param[in] p_rscs Running Speed and Cadence Service structure. * @param[in] p_rsc_measurement 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 rsc_measurement_encode(const ble_rscs_t * p_rscs, const ble_rscs_meas_t * p_rsc_measurement, uint8_t * p_encoded_buffer) { uint8_t flags = 0; uint8_t len = 1; // Instantaneous speed field len += uint16_encode(p_rsc_measurement->inst_speed, &p_encoded_buffer[len]); // Instantaneous cadence field p_encoded_buffer[len++] = p_rsc_measurement->inst_cadence; // Instantaneous stride length field if (p_rscs->feature & BLE_RSCS_FEATURE_INSTANT_STRIDE_LEN_BIT) { if (p_rsc_measurement->is_inst_stride_len_present) { flags |= RSC_MEAS_FLAG_INSTANT_STRIDE_LEN_PRESENT; len += uint16_encode(p_rsc_measurement->inst_stride_length, &p_encoded_buffer[len]); } } // Total distance field if (p_rscs->feature & BLE_RSCS_FEATURE_TOTAL_DISTANCE_BIT) { if (p_rsc_measurement->is_total_distance_present) { flags |= RSC_MEAS_FLAG_TOTAL_DISTANCE_PRESENT; len += uint32_encode(p_rsc_measurement->total_distance, &p_encoded_buffer[len]); } } // Flags field if (p_rscs->feature & BLE_RSCS_FEATURE_WALKING_OR_RUNNING_STATUS_BIT) { if (p_rsc_measurement->is_running) { flags |= RSC_MEAS_FLAG_WALKING_OR_RUNNING_BIT; } } p_encoded_buffer[0] = flags; return len; } uint32_t ble_rscs_init(ble_rscs_t * p_rscs, const ble_rscs_init_t * p_rscs_init) { if (p_rscs == NULL || p_rscs_init == NULL) { return NRF_ERROR_NULL; } uint32_t err_code; uint8_t init_value_encoded[MAX(MAX_RSCM_LEN, sizeof(uint16_t))]; ble_uuid_t ble_uuid; ble_add_char_params_t add_char_params; // Initialize service structure p_rscs->evt_handler = p_rscs_init->evt_handler; p_rscs->conn_handle = BLE_CONN_HANDLE_INVALID; p_rscs->feature = p_rscs_init->feature; // Add service BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_RUNNING_SPEED_AND_CADENCE); err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_rscs->service_handle); if (err_code != NRF_SUCCESS) { return err_code; } // Add measurement characteristic memset(&add_char_params, 0, sizeof(add_char_params)); add_char_params.uuid = BLE_UUID_RSC_MEASUREMENT_CHAR; add_char_params.max_len = MAX_RSCM_LEN; add_char_params.is_var_len = true; add_char_params.char_props.notify = 1; add_char_params.cccd_write_access = p_rscs_init->rsc_meas_cccd_wr_sec; add_char_params.p_init_value = init_value_encoded; add_char_params.init_len = rsc_measurement_encode(p_rscs, &p_rscs_init->initial_rcm, init_value_encoded); err_code = characteristic_add(p_rscs->service_handle, &add_char_params, &p_rscs->meas_handles); if (err_code != NRF_SUCCESS) { return err_code; } // Add feature characteristic memset(&add_char_params, 0, sizeof(add_char_params)); add_char_params.uuid = BLE_UUID_RSC_FEATURE_CHAR; add_char_params.max_len = sizeof(uint16_t); add_char_params.init_len = uint16_encode(p_rscs_init->feature, init_value_encoded); add_char_params.p_init_value = init_value_encoded; add_char_params.char_props.read = 1; add_char_params.read_access = p_rscs_init->rsc_feature_rd_sec; err_code = characteristic_add(p_rscs->service_handle, &add_char_params, &p_rscs->feature_handles); if (err_code != NRF_SUCCESS) { return err_code; } return NRF_SUCCESS; } uint32_t ble_rscs_measurement_send(ble_rscs_t * p_rscs, ble_rscs_meas_t * p_measurement) { if (p_rscs == NULL || p_measurement == NULL) { return NRF_ERROR_NULL; } uint32_t err_code; // Send value if connected and notifying if (p_rscs->conn_handle != BLE_CONN_HANDLE_INVALID) { uint8_t encoded_rsc_meas[MAX_RSCM_LEN]; uint16_t len; uint16_t hvx_len; ble_gatts_hvx_params_t hvx_params; len = rsc_measurement_encode(p_rscs, p_measurement, encoded_rsc_meas); hvx_len = len; memset(&hvx_params, 0, sizeof(hvx_params)); hvx_params.handle = p_rscs->meas_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_rsc_meas; err_code = sd_ble_gatts_hvx(p_rscs->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; } #endif // NRF_MODULE_ENABLED(BLE_RSCS)