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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs_c/ble_hrs_c.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs_c/ble_hrs_c.c | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs_c/ble_hrs_c.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs_c/ble_hrs_c.c new file mode 100644 index 0000000..6517d71 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_hrs_c/ble_hrs_c.c @@ -0,0 +1,384 @@ +/** + * 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. + * + */ +/**@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_srv_common.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. */ + +#define TX_BUFFER_MASK 0x07 /**< TX Buffer mask, must be a mask of continuous zeroes, followed by continuous sequence of ones: 000...111. */ +#define TX_BUFFER_SIZE (TX_BUFFER_MASK + 1) /**< Size of send buffer, which is 1 higher than the mask. */ + +#define WRITE_MESSAGE_LENGTH BLE_CCCD_VALUE_LEN /**< Length of the write message for CCCD. */ +#define WRITE_MESSAGE_LENGTH BLE_CCCD_VALUE_LEN /**< Length of the write message for CCCD. */ + +typedef enum +{ + READ_REQ, /**< Type identifying that this tx_message is a read request. */ + WRITE_REQ /**< Type identifying that this tx_message is a write request. */ +} tx_request_t; + +/**@brief Structure for writing a message to the peer, i.e. CCCD. + */ +typedef struct +{ + uint8_t gattc_value[WRITE_MESSAGE_LENGTH]; /**< The message to write. */ + ble_gattc_write_params_t gattc_params; /**< GATTC parameters for this message. */ +} write_params_t; + +/**@brief Structure for holding data to be transmitted to the connected central. + */ +typedef struct +{ + uint16_t conn_handle; /**< Connection handle to be used when transmitting this message. */ + tx_request_t type; /**< Type of this message, i.e. read or write message. */ + union + { + uint16_t read_handle; /**< Read request message. */ + write_params_t write_req; /**< Write request message. */ + } req; +} tx_message_t; + + +static tx_message_t m_tx_buffer[TX_BUFFER_SIZE]; /**< Transmit buffer for messages to be transmitted to the central. */ +static uint32_t m_tx_insert_index = 0; /**< Current index in the transmit buffer where the next message should be inserted. */ +static uint32_t m_tx_index = 0; /**< Current index in the transmit buffer from where the next message to be transmitted resides. */ + + +/**@brief Function for passing any pending request from the buffer to the stack. + */ +static void tx_buffer_process(void) +{ + if (m_tx_index != m_tx_insert_index) + { + uint32_t err_code; + + if (m_tx_buffer[m_tx_index].type == READ_REQ) + { + err_code = sd_ble_gattc_read(m_tx_buffer[m_tx_index].conn_handle, + m_tx_buffer[m_tx_index].req.read_handle, + 0); + } + else + { + err_code = sd_ble_gattc_write(m_tx_buffer[m_tx_index].conn_handle, + &m_tx_buffer[m_tx_index].req.write_req.gattc_params); + } + if (err_code == NRF_SUCCESS) + { + m_tx_index++; + m_tx_index &= TX_BUFFER_MASK; + } + else + { + NRF_LOG_DEBUG("SD Read/Write API returns error. This message sending will be " + "attempted again.."); + } + } +} + + +/**@brief Function for handling write response events. + * + * @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_write_rsp(ble_hrs_c_t * p_ble_hrs_c, const ble_evt_t * p_ble_evt) +{ + // Check if the event if on the link for this instance + if (p_ble_hrs_c->conn_handle != p_ble_evt->evt.gattc_evt.conn_handle) + { + return; + } + // Check if there is any message to be sent across to the peer and send it. + tx_buffer_process(); +} + + +/**@brief Function for handling Handle Value Notification received from the SoftDevice. + * + * @details This function will uses the Handle Value Notification received from the SoftDevice + * and checks if it is a notification of the heart rate measurement from the peer. If + * it is, this function will decode the heart rate measurement and send 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 check if the disconnect event is happening on the link + * associated with the current instance of the module, if so it will set its + * 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->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_GATTC_EVT_WRITE_RSP: + on_write_rsp(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(uint16_t conn_handle, uint16_t handle_cccd, bool enable) +{ + NRF_LOG_DEBUG("Configuring CCCD. CCCD Handle = %d, Connection Handle = %d", + handle_cccd,conn_handle); + + tx_message_t * p_msg; + uint16_t cccd_val = enable ? BLE_GATT_HVX_NOTIFICATION : 0; + + p_msg = &m_tx_buffer[m_tx_insert_index++]; + m_tx_insert_index &= TX_BUFFER_MASK; + + p_msg->req.write_req.gattc_params.handle = handle_cccd; + p_msg->req.write_req.gattc_params.len = WRITE_MESSAGE_LENGTH; + p_msg->req.write_req.gattc_params.p_value = p_msg->req.write_req.gattc_value; + p_msg->req.write_req.gattc_params.offset = 0; + p_msg->req.write_req.gattc_params.write_op = BLE_GATT_OP_WRITE_REQ; + p_msg->req.write_req.gattc_value[0] = LSB_16(cccd_val); + p_msg->req.write_req.gattc_value[1] = MSB_16(cccd_val); + p_msg->conn_handle = conn_handle; + p_msg->type = WRITE_REQ; + + tx_buffer_process(); + return NRF_SUCCESS; +} + + +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->conn_handle, + p_ble_hrs_c->peer_hrs_db.hrm_cccd_handle, + 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_SUCCESS; +} +/** @} + * @endcond + */ +#endif // NRF_MODULE_ENABLED(BLE_HRS_C) |