328 lines
11 KiB
C
328 lines
11 KiB
C
/**
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* Copyright (c) 2012 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* Attention!
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* To maintain compliance with Nordic Semiconductor ASA's Bluetooth profile
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* qualification listings, this section of source code must not be modified.
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(BLE_RSCS)
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#include "ble_rscs.h"
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#include <string.h>
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#include "ble.h"
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#include "ble_srv_common.h"
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#define OPCODE_LENGTH 1 /**< Length of opcode inside Running Speed and Cadence Measurement packet. */
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#define HANDLE_LENGTH 2 /**< Length of handle inside Running Speed and Cadence Measurement packet. */
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#define MAX_RSCM_LEN (BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH) /**< Maximum size of a transmitted Running Speed and Cadence Measurement. */
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// Running Speed and Cadence Measurement flag bits
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#define RSC_MEAS_FLAG_INSTANT_STRIDE_LEN_PRESENT (0x01 << 0) /**< Instantaneous Stride Length Present flag bit. */
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#define RSC_MEAS_FLAG_TOTAL_DISTANCE_PRESENT (0x01 << 1) /**< Total Distance Present flag bit. */
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#define RSC_MEAS_FLAG_WALKING_OR_RUNNING_BIT (0x01 << 2) /**< Walking or Running Status flag bit. */
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/**@brief Function for handling the Connect event.
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*
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* @param[in] p_rscs Running Speed and Cadence Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_connect(ble_rscs_t * p_rscs, ble_evt_t const * p_ble_evt)
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{
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p_rscs->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
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}
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/**@brief Function for handling the Disconnect event.
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*
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* @param[in] p_rscs Running Speed and Cadence Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_disconnect(ble_rscs_t * p_rscs, ble_evt_t const * p_ble_evt)
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{
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UNUSED_PARAMETER(p_ble_evt);
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p_rscs->conn_handle = BLE_CONN_HANDLE_INVALID;
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}
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/**@brief Function for handling the write events to the RSCS Measurement characteristic.
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*
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* @param[in] p_rscs Running Speed and Cadence Service structure.
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* @param[in] p_evt_write Write event received from the BLE stack.
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*/
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static void on_meas_cccd_write(ble_rscs_t * p_rscs, ble_gatts_evt_write_t const * p_evt_write)
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{
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if (p_evt_write->len == 2)
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{
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// CCCD written, update notification state
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if (p_rscs->evt_handler != NULL)
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{
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ble_rscs_evt_t evt;
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if (ble_srv_is_notification_enabled(p_evt_write->data))
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{
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evt.evt_type = BLE_RSCS_EVT_NOTIFICATION_ENABLED;
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}
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else
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{
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evt.evt_type = BLE_RSCS_EVT_NOTIFICATION_DISABLED;
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}
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p_rscs->evt_handler(p_rscs, &evt);
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}
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}
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}
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/**@brief Function for handling the Write event.
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*
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* @param[in] p_rscs Running Speed and Cadence Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_write(ble_rscs_t * p_rscs, ble_evt_t const * p_ble_evt)
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{
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ble_gatts_evt_write_t const * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
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if (p_evt_write->handle == p_rscs->meas_handles.cccd_handle)
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{
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on_meas_cccd_write(p_rscs, p_evt_write);
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}
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}
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void ble_rscs_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
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{
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if ((p_context == NULL) || (p_ble_evt == NULL))
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{
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return;
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}
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ble_rscs_t * p_rscs = (ble_rscs_t *)p_context;
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switch (p_ble_evt->header.evt_id)
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{
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case BLE_GAP_EVT_CONNECTED:
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on_connect(p_rscs, p_ble_evt);
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break;
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case BLE_GAP_EVT_DISCONNECTED:
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on_disconnect(p_rscs, p_ble_evt);
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break;
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case BLE_GATTS_EVT_WRITE:
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on_write(p_rscs, p_ble_evt);
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break;
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default:
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// No implementation needed.
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break;
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}
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}
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/**@brief Function for encoding a RSCS Measurement.
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*
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* @param[in] p_rscs Running Speed and Cadence Service structure.
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* @param[in] p_rsc_measurement Measurement to be encoded.
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* @param[out] p_encoded_buffer Buffer where the encoded data will be written.
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*
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* @return Size of encoded data.
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*/
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static uint8_t rsc_measurement_encode(const ble_rscs_t * p_rscs,
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const ble_rscs_meas_t * p_rsc_measurement,
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uint8_t * p_encoded_buffer)
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{
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uint8_t flags = 0;
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uint8_t len = 1;
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// Instantaneous speed field
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len += uint16_encode(p_rsc_measurement->inst_speed, &p_encoded_buffer[len]);
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// Instantaneous cadence field
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p_encoded_buffer[len++] = p_rsc_measurement->inst_cadence;
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// Instantaneous stride length field
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if (p_rscs->feature & BLE_RSCS_FEATURE_INSTANT_STRIDE_LEN_BIT)
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{
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if (p_rsc_measurement->is_inst_stride_len_present)
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{
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flags |= RSC_MEAS_FLAG_INSTANT_STRIDE_LEN_PRESENT;
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len += uint16_encode(p_rsc_measurement->inst_stride_length,
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&p_encoded_buffer[len]);
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}
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}
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// Total distance field
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if (p_rscs->feature & BLE_RSCS_FEATURE_TOTAL_DISTANCE_BIT)
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{
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if (p_rsc_measurement->is_total_distance_present)
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{
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flags |= RSC_MEAS_FLAG_TOTAL_DISTANCE_PRESENT;
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len += uint32_encode(p_rsc_measurement->total_distance, &p_encoded_buffer[len]);
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}
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}
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// Flags field
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if (p_rscs->feature & BLE_RSCS_FEATURE_WALKING_OR_RUNNING_STATUS_BIT)
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{
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if (p_rsc_measurement->is_running)
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{
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flags |= RSC_MEAS_FLAG_WALKING_OR_RUNNING_BIT;
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}
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}
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p_encoded_buffer[0] = flags;
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return len;
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}
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uint32_t ble_rscs_init(ble_rscs_t * p_rscs, const ble_rscs_init_t * p_rscs_init)
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{
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if (p_rscs == NULL || p_rscs_init == NULL)
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{
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return NRF_ERROR_NULL;
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}
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uint32_t err_code;
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uint8_t init_value_encoded[MAX(MAX_RSCM_LEN, sizeof(uint16_t))];
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ble_uuid_t ble_uuid;
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ble_add_char_params_t add_char_params;
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// Initialize service structure
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p_rscs->evt_handler = p_rscs_init->evt_handler;
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p_rscs->conn_handle = BLE_CONN_HANDLE_INVALID;
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p_rscs->feature = p_rscs_init->feature;
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// Add service
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BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_RUNNING_SPEED_AND_CADENCE);
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err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
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&ble_uuid,
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&p_rscs->service_handle);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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// Add measurement characteristic
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memset(&add_char_params, 0, sizeof(add_char_params));
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add_char_params.uuid = BLE_UUID_RSC_MEASUREMENT_CHAR;
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add_char_params.max_len = MAX_RSCM_LEN;
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add_char_params.is_var_len = true;
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add_char_params.char_props.notify = 1;
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add_char_params.cccd_write_access = p_rscs_init->rsc_meas_cccd_wr_sec;
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add_char_params.p_init_value = init_value_encoded;
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add_char_params.init_len = rsc_measurement_encode(p_rscs,
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&p_rscs_init->initial_rcm,
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init_value_encoded);
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err_code = characteristic_add(p_rscs->service_handle, &add_char_params, &p_rscs->meas_handles);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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// Add feature characteristic
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memset(&add_char_params, 0, sizeof(add_char_params));
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add_char_params.uuid = BLE_UUID_RSC_FEATURE_CHAR;
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add_char_params.max_len = sizeof(uint16_t);
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add_char_params.init_len = uint16_encode(p_rscs_init->feature, init_value_encoded);
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add_char_params.p_init_value = init_value_encoded;
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add_char_params.char_props.read = 1;
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add_char_params.read_access = p_rscs_init->rsc_feature_rd_sec;
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err_code = characteristic_add(p_rscs->service_handle,
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&add_char_params,
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&p_rscs->feature_handles);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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return NRF_SUCCESS;
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}
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uint32_t ble_rscs_measurement_send(ble_rscs_t * p_rscs, ble_rscs_meas_t * p_measurement)
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{
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if (p_rscs == NULL || p_measurement == NULL)
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{
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return NRF_ERROR_NULL;
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}
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uint32_t err_code;
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// Send value if connected and notifying
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if (p_rscs->conn_handle != BLE_CONN_HANDLE_INVALID)
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{
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uint8_t encoded_rsc_meas[MAX_RSCM_LEN];
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uint16_t len;
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uint16_t hvx_len;
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ble_gatts_hvx_params_t hvx_params;
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len = rsc_measurement_encode(p_rscs, p_measurement, encoded_rsc_meas);
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hvx_len = len;
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memset(&hvx_params, 0, sizeof(hvx_params));
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hvx_params.handle = p_rscs->meas_handles.value_handle;
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hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
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hvx_params.offset = 0;
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hvx_params.p_len = &hvx_len;
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hvx_params.p_data = encoded_rsc_meas;
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err_code = sd_ble_gatts_hvx(p_rscs->conn_handle, &hvx_params);
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if ((err_code == NRF_SUCCESS) && (hvx_len != len))
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{
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err_code = NRF_ERROR_DATA_SIZE;
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}
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}
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else
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{
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err_code = NRF_ERROR_INVALID_STATE;
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}
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return err_code;
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}
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#endif // NRF_MODULE_ENABLED(BLE_RSCS)
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