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/**
* Copyright (c) 2012 - 2021, 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 "app_error.h"
#include "ble.h"
#include "ble_gattc.h"
#include "ble_srv_common.h"
#include "zble_nus_c.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; case BLE_UUID_NUS_TX_CHARACTERISTIC_2: nus_c_evt.handles.nus_tx_handle_2 = p_chars[i].characteristic.handle_value; nus_c_evt.handles.nus_tx_cccd_handle_2 = 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."); }
if ((p_ble_nus_c->handles.nus_tx_handle_2 != BLE_GATT_HANDLE_INVALID) && (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_nus_c->handles.nus_tx_handle_2) && (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_2;
ble_nus_c_evt.evt_type = BLE_NUS_C_EVT_NUS_TX_EVT_2; 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_tx_handle_2 = 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);}
static uint32_t cccd_configure_2(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_2; 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; } if ((p_ble_nus_c->conn_handle == BLE_CONN_HANDLE_INVALID) || (p_ble_nus_c->handles.nus_tx_cccd_handle_2 == BLE_GATT_HANDLE_INVALID)) { return NRF_ERROR_INVALID_STATE; } cccd_configure(p_ble_nus_c, true); return cccd_configure_2(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_tx_cccd_handle_2 = p_peer_handles->nus_tx_cccd_handle_2; p_ble_nus->handles.nus_tx_handle_2 = p_peer_handles->nus_tx_handle_2;
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
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