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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.
- *
- */
- #include "sdk_common.h"
- #if NRF_MODULE_ENABLED(BLE_NUS_C)
- #include <stdlib.h>
- #include "ble.h"
- #include "ble_nus_c.h"
- #include "ble_gattc.h"
- #include "ble_srv_common.h"
- #include "app_error.h"
- #define NRF_LOG_MODULE_NAME ble_nus_c
- #include "nrf_log.h"
- NRF_LOG_MODULE_REGISTER();
- /**@brief Function for intercepting 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_nus_c_t * p_ble_nus_c = (ble_nus_c_t *)p_ctx;
- NRF_LOG_DEBUG("A GATT Client error has occurred on conn_handle: 0X%X", conn_handle);
- if (p_ble_nus_c->error_handler != NULL)
- {
- p_ble_nus_c->error_handler(nrf_error);
- }
- }
- void ble_nus_c_on_db_disc_evt(ble_nus_c_t * p_ble_nus_c, ble_db_discovery_evt_t * p_evt)
- {
- ble_nus_c_evt_t nus_c_evt;
- memset(&nus_c_evt,0,sizeof(ble_nus_c_evt_t));
- ble_gatt_db_char_t * p_chars = p_evt->params.discovered_db.charateristics;
- // Check if the NUS was discovered.
- if ( (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE)
- && (p_evt->params.discovered_db.srv_uuid.uuid == BLE_UUID_NUS_SERVICE)
- && (p_evt->params.discovered_db.srv_uuid.type == p_ble_nus_c->uuid_type))
- {
- for (uint32_t i = 0; i < p_evt->params.discovered_db.char_count; i++)
- {
- switch (p_chars[i].characteristic.uuid.uuid)
- {
- case BLE_UUID_NUS_RX_CHARACTERISTIC:
- nus_c_evt.handles.nus_rx_handle = p_chars[i].characteristic.handle_value;
- break;
- case BLE_UUID_NUS_TX_CHARACTERISTIC:
- nus_c_evt.handles.nus_tx_handle = p_chars[i].characteristic.handle_value;
- nus_c_evt.handles.nus_tx_cccd_handle = p_chars[i].cccd_handle;
- break;
- default:
- break;
- }
- }
- if (p_ble_nus_c->evt_handler != NULL)
- {
- nus_c_evt.conn_handle = p_evt->conn_handle;
- nus_c_evt.evt_type = BLE_NUS_C_EVT_DISCOVERY_COMPLETE;
- p_ble_nus_c->evt_handler(p_ble_nus_c, &nus_c_evt);
- }
- }
- }
- /**@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 if it is a notification of the NUS TX characteristic from the peer.
- * If it is, this function decodes the data and sends it to the application.
- *
- * @param[in] p_ble_nus_c Pointer to the NUS Client structure.
- * @param[in] p_ble_evt Pointer to the BLE event received.
- */
- static void on_hvx(ble_nus_c_t * p_ble_nus_c, ble_evt_t const * p_ble_evt)
- {
- // HVX can only occur from client sending.
- if ( (p_ble_nus_c->handles.nus_tx_handle != BLE_GATT_HANDLE_INVALID)
- && (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_nus_c->handles.nus_tx_handle)
- && (p_ble_nus_c->evt_handler != NULL))
- {
- ble_nus_c_evt_t ble_nus_c_evt;
- ble_nus_c_evt.evt_type = BLE_NUS_C_EVT_NUS_TX_EVT;
- ble_nus_c_evt.p_data = (uint8_t *)p_ble_evt->evt.gattc_evt.params.hvx.data;
- ble_nus_c_evt.data_len = p_ble_evt->evt.gattc_evt.params.hvx.len;
- p_ble_nus_c->evt_handler(p_ble_nus_c, &ble_nus_c_evt);
- NRF_LOG_DEBUG("Client sending data.");
- }
- }
- uint32_t ble_nus_c_init(ble_nus_c_t * p_ble_nus_c, ble_nus_c_init_t * p_ble_nus_c_init)
- {
- uint32_t err_code;
- ble_uuid_t uart_uuid;
- ble_uuid128_t nus_base_uuid = NUS_BASE_UUID;
- VERIFY_PARAM_NOT_NULL(p_ble_nus_c);
- VERIFY_PARAM_NOT_NULL(p_ble_nus_c_init);
- VERIFY_PARAM_NOT_NULL(p_ble_nus_c_init->p_gatt_queue);
- err_code = sd_ble_uuid_vs_add(&nus_base_uuid, &p_ble_nus_c->uuid_type);
- VERIFY_SUCCESS(err_code);
- uart_uuid.type = p_ble_nus_c->uuid_type;
- uart_uuid.uuid = BLE_UUID_NUS_SERVICE;
- p_ble_nus_c->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_ble_nus_c->evt_handler = p_ble_nus_c_init->evt_handler;
- p_ble_nus_c->error_handler = p_ble_nus_c_init->error_handler;
- p_ble_nus_c->handles.nus_tx_handle = BLE_GATT_HANDLE_INVALID;
- p_ble_nus_c->handles.nus_rx_handle = BLE_GATT_HANDLE_INVALID;
- p_ble_nus_c->p_gatt_queue = p_ble_nus_c_init->p_gatt_queue;
- return ble_db_discovery_evt_register(&uart_uuid);
- }
- void ble_nus_c_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
- {
- ble_nus_c_t * p_ble_nus_c = (ble_nus_c_t *)p_context;
- if ((p_ble_nus_c == NULL) || (p_ble_evt == NULL))
- {
- return;
- }
- if ( (p_ble_nus_c->conn_handle == BLE_CONN_HANDLE_INVALID)
- ||(p_ble_nus_c->conn_handle != p_ble_evt->evt.gap_evt.conn_handle)
- )
- {
- return;
- }
- switch (p_ble_evt->header.evt_id)
- {
- case BLE_GATTC_EVT_HVX:
- on_hvx(p_ble_nus_c, p_ble_evt);
- break;
- case BLE_GAP_EVT_DISCONNECTED:
- if (p_ble_evt->evt.gap_evt.conn_handle == p_ble_nus_c->conn_handle
- && p_ble_nus_c->evt_handler != NULL)
- {
- ble_nus_c_evt_t nus_c_evt;
- nus_c_evt.evt_type = BLE_NUS_C_EVT_DISCONNECTED;
- p_ble_nus_c->conn_handle = BLE_CONN_HANDLE_INVALID;
- p_ble_nus_c->evt_handler(p_ble_nus_c, &nus_c_evt);
- }
- break;
- default:
- // No implementation needed.
- break;
- }
- }
- /**@brief Function for creating a message for writing to the CCCD. */
- static uint32_t cccd_configure(ble_nus_c_t * p_ble_nus_c, bool notification_enable)
- {
- nrf_ble_gq_req_t cccd_req;
- uint8_t cccd[BLE_CCCD_VALUE_LEN];
- uint16_t cccd_val = notification_enable ? BLE_GATT_HVX_NOTIFICATION : 0;
- memset(&cccd_req, 0, sizeof(nrf_ble_gq_req_t));
- cccd[0] = LSB_16(cccd_val);
- cccd[1] = MSB_16(cccd_val);
- cccd_req.type = NRF_BLE_GQ_REQ_GATTC_WRITE;
- cccd_req.error_handler.cb = gatt_error_handler;
- cccd_req.error_handler.p_ctx = p_ble_nus_c;
- cccd_req.params.gattc_write.handle = p_ble_nus_c->handles.nus_tx_cccd_handle;
- cccd_req.params.gattc_write.len = BLE_CCCD_VALUE_LEN;
- cccd_req.params.gattc_write.offset = 0;
- cccd_req.params.gattc_write.p_value = cccd;
- cccd_req.params.gattc_write.write_op = BLE_GATT_OP_WRITE_REQ;
- cccd_req.params.gattc_write.flags = BLE_GATT_EXEC_WRITE_FLAG_PREPARED_WRITE;
- return nrf_ble_gq_item_add(p_ble_nus_c->p_gatt_queue, &cccd_req, p_ble_nus_c->conn_handle);
- }
- uint32_t ble_nus_c_tx_notif_enable(ble_nus_c_t * p_ble_nus_c)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_nus_c);
- if ( (p_ble_nus_c->conn_handle == BLE_CONN_HANDLE_INVALID)
- ||(p_ble_nus_c->handles.nus_tx_cccd_handle == BLE_GATT_HANDLE_INVALID)
- )
- {
- return NRF_ERROR_INVALID_STATE;
- }
- return cccd_configure(p_ble_nus_c, true);
- }
- uint32_t ble_nus_c_string_send(ble_nus_c_t * p_ble_nus_c, uint8_t * p_string, uint16_t length)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_nus_c);
- nrf_ble_gq_req_t write_req;
- memset(&write_req, 0, sizeof(nrf_ble_gq_req_t));
- if (length > BLE_NUS_MAX_DATA_LEN)
- {
- NRF_LOG_WARNING("Content too long.");
- return NRF_ERROR_INVALID_PARAM;
- }
- if (p_ble_nus_c->conn_handle == BLE_CONN_HANDLE_INVALID)
- {
- NRF_LOG_WARNING("Connection handle invalid.");
- return NRF_ERROR_INVALID_STATE;
- }
- write_req.type = NRF_BLE_GQ_REQ_GATTC_WRITE;
- write_req.error_handler.cb = gatt_error_handler;
- write_req.error_handler.p_ctx = p_ble_nus_c;
- write_req.params.gattc_write.handle = p_ble_nus_c->handles.nus_rx_handle;
- write_req.params.gattc_write.len = length;
- write_req.params.gattc_write.offset = 0;
- write_req.params.gattc_write.p_value = p_string;
- write_req.params.gattc_write.write_op = BLE_GATT_OP_WRITE_CMD;
- write_req.params.gattc_write.flags = BLE_GATT_EXEC_WRITE_FLAG_PREPARED_WRITE;
- return nrf_ble_gq_item_add(p_ble_nus_c->p_gatt_queue, &write_req, p_ble_nus_c->conn_handle);
- }
- uint32_t ble_nus_c_handles_assign(ble_nus_c_t * p_ble_nus,
- uint16_t conn_handle,
- ble_nus_c_handles_t const * p_peer_handles)
- {
- VERIFY_PARAM_NOT_NULL(p_ble_nus);
- p_ble_nus->conn_handle = conn_handle;
- if (p_peer_handles != NULL)
- {
- p_ble_nus->handles.nus_tx_cccd_handle = p_peer_handles->nus_tx_cccd_handle;
- p_ble_nus->handles.nus_tx_handle = p_peer_handles->nus_tx_handle;
- p_ble_nus->handles.nus_rx_handle = p_peer_handles->nus_rx_handle;
- }
- return nrf_ble_gq_conn_handle_register(p_ble_nus->p_gatt_queue, conn_handle);
- }
- #endif // NRF_MODULE_ENABLED(BLE_NUS_C)
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