123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313 |
- /**
- * 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.
- *
- */
- /**@cond To Make Doxygen skip documentation generation for this file.
- * @{
- */
- #include "sdk_common.h"
- #if NRF_MODULE_ENABLED(BLE_HRS_C)
- #include "ble_hrs_c.h"
- #include "ble_db_discovery.h"
- #include "ble_types.h"
- #include "ble_gattc.h"
- #define NRF_LOG_MODULE_NAME ble_hrs_c
- #include "nrf_log.h"
- NRF_LOG_MODULE_REGISTER();
- #define HRM_FLAG_MASK_HR_16BIT (0x01 << 0) /**< Bit mask used to extract the type of heart rate value. This is used to find if the received heart rate is a 16 bit value or an 8 bit value. */
- #define HRM_FLAG_MASK_HR_RR_INT (0x01 << 4) /**< Bit mask used to extract the presence of RR_INTERVALS. This is used to find if the received measurement includes RR_INTERVALS. */
- /**@brief Function for interception of the errors of GATTC and the BLE GATT Queue.
- *
- * @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_hrs_c_t * p_ble_hrs_c = (ble_hrs_c_t *)p_ctx;
- NRF_LOG_DEBUG("A GATT Client error has occurred on conn_handle: 0X%X", conn_handle);
- if (p_ble_hrs_c->error_handler != NULL)
- {
- p_ble_hrs_c->error_handler(nrf_error);
- }
- }
- /**@brief Function for handling Handle Value Notification received from the SoftDevice.
- *
- * @details This function uses the Handle Value Notification received from the SoftDevice
- * and checks whether it is a notification of the heart rate measurement from the peer. If
- * it is, this function decodes the heart rate measurement and sends it to the
- * application.
- *
- * @param[in] p_ble_hrs_c Pointer to the Heart Rate Client structure.
- * @param[in] p_ble_evt Pointer to the BLE event received.
- */
- static void on_hvx(ble_hrs_c_t * p_ble_hrs_c, const ble_evt_t * p_ble_evt)
- {
- // Check if the event is on the link for this instance.
- if (p_ble_hrs_c->conn_handle != p_ble_evt->evt.gattc_evt.conn_handle)
- {
- NRF_LOG_DEBUG("Received HVX on link 0x%x, not associated to this instance. Ignore.",
- p_ble_evt->evt.gattc_evt.conn_handle);
- return;
- }
- NRF_LOG_DEBUG("Received HVX on link 0x%x, hrm_handle 0x%x",
- p_ble_evt->evt.gattc_evt.params.hvx.handle,
- p_ble_hrs_c->peer_hrs_db.hrm_handle);
- // Check if this is a heart rate notification.
- if (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_hrs_c->peer_hrs_db.hrm_handle)
- {
- ble_hrs_c_evt_t ble_hrs_c_evt;
- uint32_t index = 0;
- ble_hrs_c_evt.evt_type = BLE_HRS_C_EVT_HRM_NOTIFICATION;
- ble_hrs_c_evt.conn_handle = p_ble_hrs_c->conn_handle;
- ble_hrs_c_evt.params.hrm.rr_intervals_cnt = 0;
- if (!(p_ble_evt->evt.gattc_evt.params.hvx.data[index++] & HRM_FLAG_MASK_HR_16BIT))
- {
- // 8-bit heart rate value received.
- ble_hrs_c_evt.params.hrm.hr_value = p_ble_evt->evt.gattc_evt.params.hvx.data[index++]; //lint !e415 suppress Lint Warning 415: Likely access out of bond
- }
- else
- {
- // 16-bit heart rate value received.
- ble_hrs_c_evt.params.hrm.hr_value =
- uint16_decode(&(p_ble_evt->evt.gattc_evt.params.hvx.data[index]));
- index += sizeof(uint16_t);
- }
- if ((p_ble_evt->evt.gattc_evt.params.hvx.data[0] & HRM_FLAG_MASK_HR_RR_INT))
- {
- uint32_t i;
- /*lint --e{415} --e{416} --e{662} --e{661} -save suppress Warning 415: possible access out of bond */
- for (i = 0; i < BLE_HRS_C_RR_INTERVALS_MAX_CNT; i ++)
- {
- if (index >= p_ble_evt->evt.gattc_evt.params.hvx.len)
- {
- break;
- }
- ble_hrs_c_evt.params.hrm.rr_intervals[i] =
- uint16_decode(&(p_ble_evt->evt.gattc_evt.params.hvx.data[index]));
- index += sizeof(uint16_t);
- }
- /*lint -restore*/
- ble_hrs_c_evt.params.hrm.rr_intervals_cnt = (uint8_t)i;
- }
- p_ble_hrs_c->evt_handler(p_ble_hrs_c, &ble_hrs_c_evt);
- }
- }
- /**@brief Function for handling Disconnected event received from the SoftDevice.
- *
- * @details This function checks whether the disconnect event is happening on the link
- * associated with the current instance of the module. If the event is happening, the function sets the instance's
- * conn_handle to invalid.
- *
- * @param[in] p_ble_hrs_c Pointer to the Heart Rate Client structure.
- * @param[in] p_ble_evt Pointer to the BLE event received.
- */
- static void on_disconnected(ble_hrs_c_t * p_ble_hrs_c, const ble_evt_t * p_ble_evt)
- {
- if (p_ble_hrs_c->conn_handle == p_ble_evt->evt.gap_evt.conn_handle)
- {
- p_ble_hrs_c->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle = BLE_GATT_HANDLE_INVALID;
- p_ble_hrs_c->peer_hrs_db.hrm_handle = BLE_GATT_HANDLE_INVALID;
- }
- }
- void ble_hrs_on_db_disc_evt(ble_hrs_c_t * p_ble_hrs_c, const ble_db_discovery_evt_t * p_evt)
- {
- // Check if the Heart Rate Service was discovered.
- if (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE &&
- p_evt->params.discovered_db.srv_uuid.uuid == BLE_UUID_HEART_RATE_SERVICE &&
- p_evt->params.discovered_db.srv_uuid.type == BLE_UUID_TYPE_BLE)
- {
- // Find the CCCD Handle of the Heart Rate Measurement characteristic.
- uint32_t i;
- ble_hrs_c_evt_t evt;
- evt.evt_type = BLE_HRS_C_EVT_DISCOVERY_COMPLETE;
- evt.conn_handle = p_evt->conn_handle;
- for (i = 0; i < p_evt->params.discovered_db.char_count; i++)
- {
- if (p_evt->params.discovered_db.charateristics[i].characteristic.uuid.uuid ==
- BLE_UUID_HEART_RATE_MEASUREMENT_CHAR)
- {
- // Found Heart Rate characteristic. Store CCCD handle and break.
- evt.params.peer_db.hrm_cccd_handle =
- p_evt->params.discovered_db.charateristics[i].cccd_handle;
- evt.params.peer_db.hrm_handle =
- p_evt->params.discovered_db.charateristics[i].characteristic.handle_value;
- break;
- }
- }
- NRF_LOG_DEBUG("Heart Rate Service discovered at peer.");
- //If the instance has been assigned prior to db_discovery, assign the db_handles.
- if (p_ble_hrs_c->conn_handle != BLE_CONN_HANDLE_INVALID)
- {
- if ((p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle == BLE_GATT_HANDLE_INVALID)&&
- (p_ble_hrs_c->peer_hrs_db.hrm_handle == BLE_GATT_HANDLE_INVALID))
- {
- p_ble_hrs_c->peer_hrs_db = evt.params.peer_db;
- }
- }
- p_ble_hrs_c->evt_handler(p_ble_hrs_c, &evt);
- }
- }
- uint32_t ble_hrs_c_init(ble_hrs_c_t * p_ble_hrs_c, ble_hrs_c_init_t * p_ble_hrs_c_init)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_hrs_c);
- VERIFY_PARAM_NOT_NULL(p_ble_hrs_c_init);
- ble_uuid_t hrs_uuid;
- hrs_uuid.type = BLE_UUID_TYPE_BLE;
- hrs_uuid.uuid = BLE_UUID_HEART_RATE_SERVICE;
- p_ble_hrs_c->evt_handler = p_ble_hrs_c_init->evt_handler;
- p_ble_hrs_c->error_handler = p_ble_hrs_c_init->error_handler;
- p_ble_hrs_c->p_gatt_queue = p_ble_hrs_c_init->p_gatt_queue;
- p_ble_hrs_c->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle = BLE_GATT_HANDLE_INVALID;
- p_ble_hrs_c->peer_hrs_db.hrm_handle = BLE_GATT_HANDLE_INVALID;
- return ble_db_discovery_evt_register(&hrs_uuid);
- }
- void ble_hrs_c_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
- {
- ble_hrs_c_t * p_ble_hrs_c = (ble_hrs_c_t *)p_context;
- if ((p_ble_hrs_c == NULL) || (p_ble_evt == NULL))
- {
- return;
- }
- switch (p_ble_evt->header.evt_id)
- {
- case BLE_GATTC_EVT_HVX:
- on_hvx(p_ble_hrs_c, p_ble_evt);
- break;
- case BLE_GAP_EVT_DISCONNECTED:
- on_disconnected(p_ble_hrs_c, p_ble_evt);
- break;
- default:
- break;
- }
- }
- /**@brief Function for creating a message for writing to the CCCD.
- */
- static uint32_t cccd_configure(ble_hrs_c_t * p_ble_hrs_c, bool enable)
- {
- NRF_LOG_DEBUG("Configuring CCCD. CCCD Handle = %d, Connection Handle = %d",
- p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle,
- p_ble_hrs_c->conn_handle);
- nrf_ble_gq_req_t hrs_c_req;
- uint8_t cccd[BLE_CCCD_VALUE_LEN];
- uint16_t cccd_val = enable ? BLE_GATT_HVX_NOTIFICATION : 0;
- cccd[0] = LSB_16(cccd_val);
- cccd[1] = MSB_16(cccd_val);
- memset(&hrs_c_req, 0, sizeof(hrs_c_req));
- hrs_c_req.type = NRF_BLE_GQ_REQ_GATTC_WRITE;
- hrs_c_req.error_handler.cb = gatt_error_handler;
- hrs_c_req.error_handler.p_ctx = p_ble_hrs_c;
- hrs_c_req.params.gattc_write.handle = p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle;
- hrs_c_req.params.gattc_write.len = BLE_CCCD_VALUE_LEN;
- hrs_c_req.params.gattc_write.p_value = cccd;
- hrs_c_req.params.gattc_write.write_op = BLE_GATT_OP_WRITE_REQ;
- return nrf_ble_gq_item_add(p_ble_hrs_c->p_gatt_queue, &hrs_c_req, p_ble_hrs_c->conn_handle);
- }
- uint32_t ble_hrs_c_hrm_notif_enable(ble_hrs_c_t * p_ble_hrs_c)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_hrs_c);
- return cccd_configure(p_ble_hrs_c, true);
- }
- uint32_t ble_hrs_c_handles_assign(ble_hrs_c_t * p_ble_hrs_c,
- uint16_t conn_handle,
- const hrs_db_t * p_peer_hrs_handles)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_hrs_c);
- p_ble_hrs_c->conn_handle = conn_handle;
- if (p_peer_hrs_handles != NULL)
- {
- p_ble_hrs_c->peer_hrs_db = *p_peer_hrs_handles;
- }
- return nrf_ble_gq_conn_handle_register(p_ble_hrs_c->p_gatt_queue, conn_handle);
- }
- /** @}
- * @endcond
- */
- #endif // NRF_MODULE_ENABLED(BLE_HRS_C)
|