/** * 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_LBS_C) #include "ble_lbs_c.h" #include "ble_db_discovery.h" #include "ble_types.h" #include "ble_gattc.h" #define NRF_LOG_MODULE_NAME ble_lbs_c #include "nrf_log.h" NRF_LOG_MODULE_REGISTER(); #define WRITE_MESSAGE_LENGTH BLE_CCCD_VALUE_LEN /**< Length of the write message for CCCD. */ /**@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_lbs_c_t * p_ble_lbs_c = (ble_lbs_c_t *)p_ctx; NRF_LOG_DEBUG("A GATT Client error has occurred on conn_handle: 0X%X", conn_handle); if (p_ble_lbs_c->error_handler != NULL) { p_ble_lbs_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 Button state from the peer. If * it is, this function decodes the state of the button and sends it to the * application. * * @param[in] p_ble_lbs_c Pointer to the Led Button Client structure. * @param[in] p_ble_evt Pointer to the BLE event received. */ static void on_hvx(ble_lbs_c_t * p_ble_lbs_c, ble_evt_t const * p_ble_evt) { // Check if the event is on the link for this instance. if (p_ble_lbs_c->conn_handle != p_ble_evt->evt.gattc_evt.conn_handle) { return; } // Check if this is a Button notification. if (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_lbs_c->peer_lbs_db.button_handle) { if (p_ble_evt->evt.gattc_evt.params.hvx.len == 1) { ble_lbs_c_evt_t ble_lbs_c_evt; ble_lbs_c_evt.evt_type = BLE_LBS_C_EVT_BUTTON_NOTIFICATION; ble_lbs_c_evt.conn_handle = p_ble_lbs_c->conn_handle; ble_lbs_c_evt.params.button.button_state = p_ble_evt->evt.gattc_evt.params.hvx.data[0]; p_ble_lbs_c->evt_handler(p_ble_lbs_c, &ble_lbs_c_evt); } } } /**@brief Function for handling the 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_lbs_c Pointer to the Led Button Client structure. * @param[in] p_ble_evt Pointer to the BLE event received. */ static void on_disconnected(ble_lbs_c_t * p_ble_lbs_c, ble_evt_t const * p_ble_evt) { if (p_ble_lbs_c->conn_handle == p_ble_evt->evt.gap_evt.conn_handle) { p_ble_lbs_c->conn_handle = BLE_CONN_HANDLE_INVALID; p_ble_lbs_c->peer_lbs_db.button_cccd_handle = BLE_GATT_HANDLE_INVALID; p_ble_lbs_c->peer_lbs_db.button_handle = BLE_GATT_HANDLE_INVALID; p_ble_lbs_c->peer_lbs_db.led_handle = BLE_GATT_HANDLE_INVALID; } } void ble_lbs_on_db_disc_evt(ble_lbs_c_t * p_ble_lbs_c, ble_db_discovery_evt_t const * p_evt) { // Check if the LED Button Service was discovered. if (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE && p_evt->params.discovered_db.srv_uuid.uuid == LBS_UUID_SERVICE && p_evt->params.discovered_db.srv_uuid.type == p_ble_lbs_c->uuid_type) { ble_lbs_c_evt_t evt; evt.evt_type = BLE_LBS_C_EVT_DISCOVERY_COMPLETE; evt.conn_handle = p_evt->conn_handle; for (uint32_t i = 0; i < p_evt->params.discovered_db.char_count; i++) { const ble_gatt_db_char_t * p_char = &(p_evt->params.discovered_db.charateristics[i]); switch (p_char->characteristic.uuid.uuid) { case LBS_UUID_LED_CHAR: evt.params.peer_db.led_handle = p_char->characteristic.handle_value; break; case LBS_UUID_BUTTON_CHAR: evt.params.peer_db.button_handle = p_char->characteristic.handle_value; evt.params.peer_db.button_cccd_handle = p_char->cccd_handle; break; default: break; } } NRF_LOG_DEBUG("LED Button Service discovered at peer."); //If the instance was assigned prior to db_discovery, assign the db_handles if (p_ble_lbs_c->conn_handle != BLE_CONN_HANDLE_INVALID) { if ((p_ble_lbs_c->peer_lbs_db.led_handle == BLE_GATT_HANDLE_INVALID)&& (p_ble_lbs_c->peer_lbs_db.button_handle == BLE_GATT_HANDLE_INVALID)&& (p_ble_lbs_c->peer_lbs_db.button_cccd_handle == BLE_GATT_HANDLE_INVALID)) { p_ble_lbs_c->peer_lbs_db = evt.params.peer_db; } } p_ble_lbs_c->evt_handler(p_ble_lbs_c, &evt); } } uint32_t ble_lbs_c_init(ble_lbs_c_t * p_ble_lbs_c, ble_lbs_c_init_t * p_ble_lbs_c_init) { uint32_t err_code; ble_uuid_t lbs_uuid; ble_uuid128_t lbs_base_uuid = {LBS_UUID_BASE}; VERIFY_PARAM_NOT_NULL(p_ble_lbs_c); VERIFY_PARAM_NOT_NULL(p_ble_lbs_c_init); VERIFY_PARAM_NOT_NULL(p_ble_lbs_c_init->evt_handler); VERIFY_PARAM_NOT_NULL(p_ble_lbs_c_init->p_gatt_queue); p_ble_lbs_c->peer_lbs_db.button_cccd_handle = BLE_GATT_HANDLE_INVALID; p_ble_lbs_c->peer_lbs_db.button_handle = BLE_GATT_HANDLE_INVALID; p_ble_lbs_c->peer_lbs_db.led_handle = BLE_GATT_HANDLE_INVALID; p_ble_lbs_c->conn_handle = BLE_CONN_HANDLE_INVALID; p_ble_lbs_c->evt_handler = p_ble_lbs_c_init->evt_handler; p_ble_lbs_c->p_gatt_queue = p_ble_lbs_c_init->p_gatt_queue; p_ble_lbs_c->error_handler = p_ble_lbs_c_init->error_handler; err_code = sd_ble_uuid_vs_add(&lbs_base_uuid, &p_ble_lbs_c->uuid_type); if (err_code != NRF_SUCCESS) { return err_code; } VERIFY_SUCCESS(err_code); lbs_uuid.type = p_ble_lbs_c->uuid_type; lbs_uuid.uuid = LBS_UUID_SERVICE; return ble_db_discovery_evt_register(&lbs_uuid); } void ble_lbs_c_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context) { if ((p_context == NULL) || (p_ble_evt == NULL)) { return; } ble_lbs_c_t * p_ble_lbs_c = (ble_lbs_c_t *)p_context; switch (p_ble_evt->header.evt_id) { case BLE_GATTC_EVT_HVX: on_hvx(p_ble_lbs_c, p_ble_evt); break; case BLE_GAP_EVT_DISCONNECTED: on_disconnected(p_ble_lbs_c, p_ble_evt); break; default: break; } } /**@brief Function for configuring the CCCD. * * @param[in] p_ble_lbs_c Pointer to the LED Button Client structure. * @param[in] enable Whether to enable or disable the CCCD. * * @return NRF_SUCCESS if the CCCD configure was successfully sent to the peer. */ static uint32_t cccd_configure(ble_lbs_c_t * p_ble_lbs_c, bool enable) { NRF_LOG_DEBUG("Configuring CCCD. CCCD Handle = %d, Connection Handle = %d", p_ble_lbs_c->peer_lbs_db.button_cccd_handle, p_ble_lbs_c->conn_handle); nrf_ble_gq_req_t cccd_req; uint16_t cccd_val = enable ? BLE_GATT_HVX_NOTIFICATION : 0; uint8_t cccd[WRITE_MESSAGE_LENGTH]; 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_lbs_c; cccd_req.params.gattc_write.handle = p_ble_lbs_c->peer_lbs_db.button_cccd_handle; cccd_req.params.gattc_write.len = WRITE_MESSAGE_LENGTH; 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; return nrf_ble_gq_item_add(p_ble_lbs_c->p_gatt_queue, &cccd_req, p_ble_lbs_c->conn_handle); } uint32_t ble_lbs_c_button_notif_enable(ble_lbs_c_t * p_ble_lbs_c) { VERIFY_PARAM_NOT_NULL(p_ble_lbs_c); if (p_ble_lbs_c->conn_handle == BLE_CONN_HANDLE_INVALID) { return NRF_ERROR_INVALID_STATE; } return cccd_configure(p_ble_lbs_c, true); } uint32_t ble_lbs_led_status_send(ble_lbs_c_t * p_ble_lbs_c, uint8_t status) { VERIFY_PARAM_NOT_NULL(p_ble_lbs_c); if (p_ble_lbs_c->conn_handle == BLE_CONN_HANDLE_INVALID) { return NRF_ERROR_INVALID_STATE; } NRF_LOG_DEBUG("Writing LED status 0x%x", status); nrf_ble_gq_req_t write_req; memset(&write_req, 0, sizeof(nrf_ble_gq_req_t)); 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_lbs_c; write_req.params.gattc_write.handle = p_ble_lbs_c->peer_lbs_db.led_handle; write_req.params.gattc_write.len = sizeof(status); write_req.params.gattc_write.p_value = &status; write_req.params.gattc_write.offset = 0; write_req.params.gattc_write.write_op = BLE_GATT_OP_WRITE_CMD; return nrf_ble_gq_item_add(p_ble_lbs_c->p_gatt_queue, &write_req, p_ble_lbs_c->conn_handle); } uint32_t ble_lbs_c_handles_assign(ble_lbs_c_t * p_ble_lbs_c, uint16_t conn_handle, const lbs_db_t * p_peer_handles) { VERIFY_PARAM_NOT_NULL(p_ble_lbs_c); p_ble_lbs_c->conn_handle = conn_handle; if (p_peer_handles != NULL) { p_ble_lbs_c->peer_lbs_db = *p_peer_handles; } return nrf_ble_gq_conn_handle_register(p_ble_lbs_c->p_gatt_queue, conn_handle); } #endif // NRF_MODULE_ENABLED(BLE_LBS_C)