/** * Copyright (c) 2014 - 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. * */ /** * @brief BLE LED Button Service central and client application main file. * * This example can be a central for up to 8 peripherals. * The peripheral is called ble_app_blinky and can be found in the ble_peripheral * folder. */ #include #include #include #include "nordic_common.h" #include "nrf_sdh.h" #include "nrf_sdh_ble.h" #include "app_timer.h" #include "bsp_btn_ble.h" #include "ble.h" #include "ble_hci.h" #include "ble_advertising.h" #include "ble_conn_params.h" #include "ble_db_discovery.h" //#include "ble_lbs_c.h" #include "ble_nus_c_cust.h" #include "ble_conn_state.h" #include "nrf_ble_gatt.h" #include "nrf_pwr_mgmt.h" #include "nrf_ble_scan.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" #define APP_BLE_CONN_CFG_TAG 1 /**< Tag that refers to the BLE stack configuration that is set with @ref sd_ble_cfg_set. The default tag is @ref APP_BLE_CONN_CFG_TAG. */ #define APP_BLE_OBSERVER_PRIO 3 /**< BLE observer priority of the application. There is no need to modify this value. */ #define CENTRAL_SCANNING_LED BSP_BOARD_LED_0 #define CENTRAL_CONNECTED_LED BSP_BOARD_LED_1 #define LEDBUTTON_LED BSP_BOARD_LED_2 /**< LED to indicate a change of state of the Button characteristic on the peer. */ #define LEDBUTTON_BUTTON BSP_BUTTON_0 /**< Button that writes to the LED characteristic of the peer. */ #define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */ //BLE_LBS_C_ARRAY_DEF(m_lbs_c, NRF_SDH_BLE_CENTRAL_LINK_COUNT); /**< LED button client instances. */ BLE_NUS_C_ARRAY_DEF(m_nus_c, NRF_SDH_BLE_CENTRAL_LINK_COUNT); /**< LED button client instances. */ BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, NRF_SDH_BLE_CENTRAL_LINK_COUNT); /**< Database discovery module instances. */ NRF_BLE_SCAN_DEF(m_scan); /**< Scanning Module instance. */ //static char const m_target_periph_name[] = "Nordic_Blinky"; /**< Name of the device to try to connect to. This name is searched for in the scanning report data. */ static char const m_target_periph_name[] = "Nordic_UART"; /**< Name of the device to try to connect to. This name is searched for in the scanning report data. */ /**@brief Function for handling asserts in the SoftDevice. * * @details This function is called in case of an assert in the SoftDevice. * * @warning This handler is only an example and is not meant for the final product. You need to analyze * how your product is supposed to react in case of an assert. * @warning On assert from the SoftDevice, the system can only recover on reset. * * @param[in] line_num Line number of the failing assert call. * @param[in] p_file_name File name of the failing assert call. */ void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name) { app_error_handler(0xDEADBEEF, line_num, p_file_name); } /**@brief Function for initializing the LEDs. * * @details Initializes all LEDs used by the application. */ static void leds_init(void) { bsp_board_init(BSP_INIT_LEDS); } static void scan_evt_handler(scan_evt_t const * p_scan_evt) { ret_code_t err_code; switch(p_scan_evt->scan_evt_id) { case NRF_BLE_SCAN_EVT_CONNECTING_ERROR: { err_code = p_scan_evt->params.connecting_err.err_code; APP_ERROR_CHECK(err_code); } break; default: break; } } /**@brief Function for initializing the scanning and setting the filters. */ static void scan_init(void) { ret_code_t err_code; nrf_ble_scan_init_t init_scan; memset(&init_scan, 0, sizeof(init_scan)); init_scan.connect_if_match = true; init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG; err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler); APP_ERROR_CHECK(err_code); err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name); APP_ERROR_CHECK(err_code); err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_NAME_FILTER, false); APP_ERROR_CHECK(err_code); } /**@brief Function for starting scanning. */ static void scan_start(void) { ret_code_t ret; NRF_LOG_INFO("Start scanning for device name %s.", (uint32_t)m_target_periph_name); ret = nrf_ble_scan_start(&m_scan); APP_ERROR_CHECK(ret); // Turn on the LED to signal scanning. bsp_board_led_on(CENTRAL_SCANNING_LED); } /**@brief Handles events coming from the LED Button central module. * * @param[in] p_lbs_c The instance of LBS_C that triggered the event. * @param[in] p_lbs_c_evt The LBS_C event. */ //static void nus_c_evt_handler(ble_nus_c_t * p_nus_c, ble_nus_c_evt_t * p_nus_c_evt) static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, ble_nus_c_evt_t const * p_ble_nus_evt) { switch (p_ble_nus_evt->evt_type) { case BLE_NUS_C_EVT_DISCOVERY_COMPLETE: { ret_code_t err_code; NRF_LOG_INFO("Nordic UART Service discovered on conn_handle 0x%x", p_ble_nus_evt->conn_handle); err_code = app_button_enable(); APP_ERROR_CHECK(err_code); err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles); APP_ERROR_CHECK(err_code); // LED Button Service discovered. Enable notification of Button. err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c); APP_ERROR_CHECK(err_code); } break; // BLE_LBS_C_EVT_DISCOVERY_COMPLETE case BLE_NUS_C_EVT_NUS_TX_EVT: { // NRF_LOG_INFO("Link 0x%x, Button state changed on peer to 0x%x", // p_nus_c_evt->conn_handle, // p_nus_c_evt->params.button.button_state); NRF_LOG_INFO("notification from conn handle 0x%04x", p_ble_nus_evt->conn_handle); NRF_LOG_RAW_INFO("data: "); for (int i=0; idata_len; i++) { NRF_LOG_RAW_INFO("%c", p_ble_nus_evt->p_data[i]); } NRF_LOG_RAW_INFO("\r\n"); // if (p_nus_c_evt->params.button.button_state) // { // bsp_board_led_on(LEDBUTTON_LED); // } // else // { // bsp_board_led_off(LEDBUTTON_LED); // } } break; // BLE_LBS_C_EVT_BUTTON_NOTIFICATION default: // No implementation needed. break; } } /**@brief Function for handling BLE events. * * @param[in] p_ble_evt Bluetooth stack event. * @param[in] p_context Unused. */ static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context) { ret_code_t err_code; // For readability. ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt; switch (p_ble_evt->header.evt_id) { // Upon connection, check which peripheral is connected, initiate DB // discovery, update LEDs status, and resume scanning, if necessary. case BLE_GAP_EVT_CONNECTED: { NRF_LOG_INFO("Connection 0x%x established, starting DB discovery.", p_gap_evt->conn_handle); APP_ERROR_CHECK_BOOL(p_gap_evt->conn_handle < NRF_SDH_BLE_CENTRAL_LINK_COUNT); err_code = ble_nus_c_handles_assign(&m_nus_c[p_gap_evt->conn_handle], p_gap_evt->conn_handle, NULL); APP_ERROR_CHECK(err_code); err_code = ble_db_discovery_start(&m_db_disc[p_gap_evt->conn_handle], p_gap_evt->conn_handle); if (err_code != NRF_ERROR_BUSY) { APP_ERROR_CHECK(err_code); } // Update LEDs status and check whether it is needed to look for more // peripherals to connect to. bsp_board_led_on(CENTRAL_CONNECTED_LED); if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) { bsp_board_led_off(CENTRAL_SCANNING_LED); } else { // Resume scanning. bsp_board_led_on(CENTRAL_SCANNING_LED); scan_start(); } } break; // BLE_GAP_EVT_CONNECTED // Upon disconnection, reset the connection handle of the peer that disconnected, update // the LEDs status and start scanning again. case BLE_GAP_EVT_DISCONNECTED: { NRF_LOG_INFO("LBS central link 0x%x disconnected (reason: 0x%x)", p_gap_evt->conn_handle, p_gap_evt->params.disconnected.reason); if (ble_conn_state_central_conn_count() == 0) { err_code = app_button_disable(); APP_ERROR_CHECK(err_code); // Turn off the LED that indicates the connection. bsp_board_led_off(CENTRAL_CONNECTED_LED); } // Start scanning. scan_start(); // Turn on the LED for indicating scanning. bsp_board_led_on(CENTRAL_SCANNING_LED); } break; case BLE_GAP_EVT_TIMEOUT: { // Timeout for scanning is not specified, so only the connection requests can time out. if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) { NRF_LOG_DEBUG("Connection request timed out."); } } break; case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: { NRF_LOG_DEBUG("BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST."); // Accept parameters requested by peer. err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle, &p_gap_evt->params.conn_param_update_request.conn_params); APP_ERROR_CHECK(err_code); } break; case BLE_GAP_EVT_PHY_UPDATE_REQUEST: { NRF_LOG_DEBUG("PHY update request."); ble_gap_phys_t const phys = { .rx_phys = BLE_GAP_PHY_AUTO, .tx_phys = BLE_GAP_PHY_AUTO, }; err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys); APP_ERROR_CHECK(err_code); } break; case BLE_GATTC_EVT_TIMEOUT: { // Disconnect on GATT client timeout event. NRF_LOG_DEBUG("GATT client timeout."); err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); APP_ERROR_CHECK(err_code); } break; case BLE_GATTS_EVT_TIMEOUT: { // Disconnect on GATT server timeout event. NRF_LOG_DEBUG("GATT server timeout."); err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); APP_ERROR_CHECK(err_code); } break; default: // No implementation needed. break; } } /**@brief LED Button collector initialization. */ static void nus_c_init(void) { ret_code_t err_code; ble_nus_c_init_t nus_c_init_obj; nus_c_init_obj.evt_handler = ble_nus_c_evt_handler; for (uint32_t i = 0; i < NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { err_code = ble_nus_c_init(&m_nus_c[i], &nus_c_init_obj); APP_ERROR_CHECK(err_code); } } /**@brief Function for initializing the BLE stack. * * @details Initializes the SoftDevice and the BLE event interrupts. */ static void ble_stack_init(void) { ret_code_t err_code; err_code = nrf_sdh_enable_request(); APP_ERROR_CHECK(err_code); // Configure the BLE stack using the default settings. // Fetch the start address of the application RAM. uint32_t ram_start = 0; err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start); APP_ERROR_CHECK(err_code); // Enable BLE stack. err_code = nrf_sdh_ble_enable(&ram_start); APP_ERROR_CHECK(err_code); // Register a handler for BLE events. NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL); } /**@brief Function for writing to the LED characteristic of all connected clients. * * @details Based on whether the button is pressed or released, this function writes a high or low * LED status to the server. * * @param[in] button_action The button action (press or release). * Determines whether the LEDs of the servers are ON or OFF. * * @return If successful, NRF_SUCCESS is returned. Otherwise, returns the error code from @ref ble_lbs_led_status_send. */ static ret_code_t led_status_send_to_all(uint8_t button_action) { ret_code_t err_code; for (uint32_t i = 0; i< NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { //err_code = ble_nus_c_string_send(&m_nus_c[i], button_action); err_code = NRF_SUCCESS; NRF_LOG_INFO("not actually sending anything"); if (err_code != NRF_SUCCESS && err_code != BLE_ERROR_INVALID_CONN_HANDLE && err_code != NRF_ERROR_INVALID_STATE) { return err_code; } } return NRF_SUCCESS; } /**@brief Function for handling events from the button handler module. * * @param[in] pin_no The pin that the event applies to. * @param[in] button_action The button action (press or release). */ static void button_event_handler(uint8_t pin_no, uint8_t button_action) { ret_code_t err_code; switch (pin_no) { case LEDBUTTON_BUTTON: err_code = led_status_send_to_all(button_action); if (err_code == NRF_SUCCESS) { NRF_LOG_INFO("LBS write LED state %d", button_action); } break; default: APP_ERROR_HANDLER(pin_no); break; } } /**@brief Function for initializing the button handler module. */ static void buttons_init(void) { ret_code_t err_code; // The array must be static because a pointer to it is saved in the button handler module. static app_button_cfg_t buttons[] = { {LEDBUTTON_BUTTON, false, BUTTON_PULL, button_event_handler} }; err_code = app_button_init(buttons, ARRAY_SIZE(buttons), BUTTON_DETECTION_DELAY); APP_ERROR_CHECK(err_code); } /**@brief Function for handling database discovery events. * * @details This function is a callback function to handle events from the database discovery module. * Depending on the UUIDs that are discovered, this function forwards the events * to their respective services. * * @param[in] p_event Pointer to the database discovery event. */ static void db_disc_handler(ble_db_discovery_evt_t * p_evt) { NRF_LOG_DEBUG("call to ble_nus_on_db_disc_evt for instance %d and link 0x%x!", p_evt->conn_handle, p_evt->conn_handle); ble_nus_c_on_db_disc_evt(&m_nus_c[p_evt->conn_handle], p_evt); } /** @brief Database discovery initialization. */ static void db_discovery_init(void) { ret_code_t err_code = ble_db_discovery_init(db_disc_handler); APP_ERROR_CHECK(err_code); } /**@brief Function for initializing power management. */ static void power_management_init(void) { ret_code_t err_code; err_code = nrf_pwr_mgmt_init(); APP_ERROR_CHECK(err_code); } /**@brief Function for handling the idle state (main loop). * * @details This function handles any pending log operations, then sleeps until the next event occurs. */ static void idle_state_handle(void) { if (NRF_LOG_PROCESS() == false) { nrf_pwr_mgmt_run(); } } /** @brief Function for initializing the log module. */ static void log_init(void) { ret_code_t err_code = NRF_LOG_INIT(NULL); APP_ERROR_CHECK(err_code); NRF_LOG_DEFAULT_BACKENDS_INIT(); } /** @brief Function for initializing the timer. */ static void timer_init(void) { ret_code_t err_code = app_timer_init(); APP_ERROR_CHECK(err_code); } /**@brief Function for initializing the GATT module. */ static void gatt_init(void) { ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL); APP_ERROR_CHECK(err_code); } int main(void) { // Initialize. log_init(); timer_init(); leds_init(); buttons_init(); power_management_init(); ble_stack_init(); gatt_init(); db_discovery_init(); nus_c_init(); ble_conn_state_init(); scan_init(); // Start execution. NRF_LOG_INFO("Multilink example started."); scan_start(); for (;;) { idle_state_handle(); } }