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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 "ble_cscs.h"
- #include <string.h>
- #include "nordic_common.h"
- #include "ble.h"
- #include "ble_err.h"
- #include "ble_srv_common.h"
- #include "app_util.h"
- #define OPCODE_LENGTH 1 /**< Length of opcode inside Cycling Speed and Cadence Measurement packet. */
- #define HANDLE_LENGTH 2 /**< Length of handle inside Cycling Speed and Cadence Measurement packet. */
- #define MAX_CSCM_LEN (BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Cycling Speed and Cadence Measurement. */
- // Cycling Speed and Cadence Measurement flag bits
- #define CSC_MEAS_FLAG_MASK_WHEEL_REV_DATA_PRESENT (0x01 << 0) /**< Wheel revolution data present flag bit. */
- #define CSC_MEAS_FLAG_MASK_CRANK_REV_DATA_PRESENT (0x01 << 1) /**< Crank revolution data present flag bit. */
- /**@brief Function for handling the Connect event.
- *
- * @param[in] p_cscs Cycling Speed and Cadence Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_connect(ble_cscs_t * p_cscs, ble_evt_t const * p_ble_evt)
- {
- p_cscs->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
- }
- /**@brief Function for handling the Disconnect event.
- *
- * @param[in] p_cscs Cycling Speed and Cadence Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_disconnect(ble_cscs_t * p_cscs, ble_evt_t const * p_ble_evt)
- {
- UNUSED_PARAMETER(p_ble_evt);
- p_cscs->conn_handle = BLE_CONN_HANDLE_INVALID;
- }
- /**@brief Function for handling write events to the CSCS Measurement characteristic.
- *
- * @param[in] p_cscs Cycling Speed and Cadence Service structure.
- * @param[in] p_evt_write Write event received from the BLE stack.
- */
- static void on_meas_cccd_write(ble_cscs_t * p_cscs, ble_gatts_evt_write_t const * p_evt_write)
- {
- if (p_evt_write->len == 2)
- {
- // CCCD written, update notification state
- if (p_cscs->evt_handler != NULL)
- {
- ble_cscs_evt_t evt;
- if (ble_srv_is_notification_enabled(p_evt_write->data))
- {
- evt.evt_type = BLE_CSCS_EVT_NOTIFICATION_ENABLED;
- }
- else
- {
- evt.evt_type = BLE_CSCS_EVT_NOTIFICATION_DISABLED;
- }
- p_cscs->evt_handler(p_cscs, &evt);
- }
- }
- }
- /**@brief Function for handling the Write event.
- *
- * @param[in] p_cscs Cycling Speed and Cadence Service structure.
- * @param[in] p_ble_evt Event received from the BLE stack.
- */
- static void on_write(ble_cscs_t * p_cscs, 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_cscs->meas_handles.cccd_handle)
- {
- on_meas_cccd_write(p_cscs, p_evt_write);
- }
- }
- void ble_cscs_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
- {
- ble_cscs_t * p_cscs = (ble_cscs_t *)p_context;
- if (p_cscs == NULL || p_ble_evt == NULL)
- {
- return;
- }
- ble_sc_ctrlpt_on_ble_evt(&(p_cscs->ctrl_pt), p_ble_evt);
- switch (p_ble_evt->header.evt_id)
- {
- case BLE_GAP_EVT_CONNECTED:
- on_connect(p_cscs, p_ble_evt);
- break;
- case BLE_GAP_EVT_DISCONNECTED:
- on_disconnect(p_cscs, p_ble_evt);
- break;
- case BLE_GATTS_EVT_WRITE:
- on_write(p_cscs, p_ble_evt);
- break;
- default:
- // No implementation needed.
- break;
- }
- }
- /**@brief Function for encoding a CSCS Measurement.
- *
- * @param[in] p_cscs Cycling Speed and Cadence Service structure.
- * @param[in] p_csc_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 csc_measurement_encode(ble_cscs_t * p_cscs,
- ble_cscs_meas_t * p_csc_measurement,
- uint8_t * p_encoded_buffer)
- {
- uint8_t flags = 0;
- uint8_t len = 1;
- // Cumulative Wheel Revolutions and Last Wheel Event Time Fields
- if (p_cscs->feature & BLE_CSCS_FEATURE_WHEEL_REV_BIT)
- {
- if (p_csc_measurement->is_wheel_rev_data_present)
- {
- flags |= CSC_MEAS_FLAG_MASK_WHEEL_REV_DATA_PRESENT;
- len += uint32_encode(p_csc_measurement->cumulative_wheel_revs, &p_encoded_buffer[len]);
- len += uint16_encode(p_csc_measurement->last_wheel_event_time, &p_encoded_buffer[len]);
- }
- }
- // Cumulative Crank Revolutions and Last Crank Event Time Fields
- if (p_cscs->feature & BLE_CSCS_FEATURE_CRANK_REV_BIT)
- {
- if (p_csc_measurement->is_crank_rev_data_present)
- {
- flags |= CSC_MEAS_FLAG_MASK_CRANK_REV_DATA_PRESENT;
- len += uint16_encode(p_csc_measurement->cumulative_crank_revs, &p_encoded_buffer[len]);
- len += uint16_encode(p_csc_measurement->last_crank_event_time, &p_encoded_buffer[len]);
- }
- }
- // Flags Field
- p_encoded_buffer[0] = flags;
- return len;
- }
- uint32_t ble_cscs_init(ble_cscs_t * p_cscs, ble_cscs_init_t const * p_cscs_init)
- {
- if (p_cscs == NULL || p_cscs_init == NULL)
- {
- return NRF_ERROR_NULL;
- }
- uint32_t err_code;
- uint8_t init_value_encoded[MAX_CSCM_LEN];
- ble_cscs_meas_t initial_scm = {0};
- ble_add_char_params_t add_char_params;
- ble_uuid_t ble_uuid;
- ble_cs_ctrlpt_init_t sc_ctrlpt_init;
- // Initialize service structure
- p_cscs->evt_handler = p_cscs_init->evt_handler;
- p_cscs->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_cscs->feature = p_cscs_init->feature;
- // Add service
- BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_CYCLING_SPEED_AND_CADENCE);
- err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
- &ble_uuid,
- &p_cscs->service_handle);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- // Add cycling speed and cadence measurement characteristic
- memset(&add_char_params, 0, sizeof(add_char_params));
- add_char_params.uuid = BLE_UUID_CSC_MEASUREMENT_CHAR;
- add_char_params.max_len = MAX_CSCM_LEN;
- add_char_params.is_var_len = true;
- add_char_params.init_len = csc_measurement_encode(p_cscs, &initial_scm, init_value_encoded);
- add_char_params.p_init_value = init_value_encoded;
- add_char_params.char_props.notify = 1;
- add_char_params.cccd_write_access = p_cscs_init->csc_meas_cccd_wr_sec;
- err_code = characteristic_add(p_cscs->service_handle, &add_char_params, &p_cscs->meas_handles);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- // Add cycling speed and cadence feature characteristic
- memset(&add_char_params, 0, sizeof(add_char_params));
- add_char_params.uuid = BLE_UUID_CSC_FEATURE_CHAR;
- add_char_params.max_len = sizeof(uint16_t);
- add_char_params.init_len = uint16_encode(p_cscs_init->feature, &init_value_encoded[0]);
- add_char_params.p_init_value = init_value_encoded;
- add_char_params.char_props.read = 1;
- add_char_params.read_access = p_cscs_init->csc_feature_rd_sec;
- err_code = characteristic_add(p_cscs->service_handle,
- &add_char_params,
- &p_cscs->feature_handles);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- // Add Sensor Location characteristic (optional)
- if (p_cscs_init->sensor_location != NULL)
- {
- memset(&add_char_params, 0, sizeof(add_char_params));
- add_char_params.uuid = BLE_UUID_SENSOR_LOCATION_CHAR;
- add_char_params.max_len = sizeof(uint8_t);
- add_char_params.init_len = sizeof(uint8_t);
- add_char_params.p_init_value = (uint8_t *)p_cscs_init->sensor_location;
- add_char_params.char_props.read = 1;
- add_char_params.read_access = p_cscs_init->csc_location_rd_sec;
- err_code = characteristic_add(p_cscs->service_handle, &add_char_params, &p_cscs->sensor_loc_handles);
- if (err_code != NRF_SUCCESS)
- {
- return err_code;
- }
- }
- // Add speed and cadence control point characteristic
- sc_ctrlpt_init.error_handler = p_cscs_init->error_handler;
- sc_ctrlpt_init.size_list_supported_locations = p_cscs_init->size_list_supported_locations;
- sc_ctrlpt_init.supported_functions = p_cscs_init->ctrplt_supported_functions;
- sc_ctrlpt_init.evt_handler = p_cscs_init->ctrlpt_evt_handler;
- sc_ctrlpt_init.list_supported_locations = p_cscs_init->list_supported_locations;
- sc_ctrlpt_init.sc_ctrlpt_wr_sec = p_cscs_init->sc_ctrlpt_wr_sec;
- sc_ctrlpt_init.sc_ctrlpt_cccd_wr_sec = p_cscs_init->sc_ctrlpt_cccd_wr_sec;
- sc_ctrlpt_init.sensor_location_handle = p_cscs->sensor_loc_handles.value_handle;
- sc_ctrlpt_init.service_handle = p_cscs->service_handle;
- return ble_sc_ctrlpt_init(&p_cscs->ctrl_pt, &sc_ctrlpt_init);
- }
- uint32_t ble_cscs_measurement_send(ble_cscs_t * p_cscs, ble_cscs_meas_t * p_measurement)
- {
- if (p_cscs == NULL || p_measurement == NULL)
- {
- return NRF_ERROR_NULL;
- }
- uint32_t err_code;
- // Send value if connected and notifying
- if (p_cscs->conn_handle != BLE_CONN_HANDLE_INVALID)
- {
- uint8_t encoded_csc_meas[MAX_CSCM_LEN];
- uint16_t len;
- uint16_t hvx_len;
- ble_gatts_hvx_params_t hvx_params;
- len = csc_measurement_encode(p_cscs, p_measurement, encoded_csc_meas);
- hvx_len = len;
- memset(&hvx_params, 0, sizeof(hvx_params));
- hvx_params.handle = p_cscs->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_csc_meas;
- err_code = sd_ble_gatts_hvx(p_cscs->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;
- }
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