/** * Copyright (c) 2014 - 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. * */ /** * @brief BLE Heart Rate Collector application main file. * * This file contains the source code for a sample heart rate collector. */ #include #include #include #include "nordic_common.h" #include "nrf_sdm.h" #include "ble.h" #include "ble_hci.h" #include "ble_db_discovery.h" #include "ble_srv_common.h" #include "nrf_sdh.h" #include "nrf_sdh_ble.h" #include "nrf_sdh_soc.h" #include "nrf_pwr_mgmt.h" #include "app_util.h" #include "app_error.h" #include "peer_manager.h" #include "peer_manager_handler.h" #include "ble_hrs_c.h" #include "app_util.h" #include "app_timer.h" #include "bsp_btn_ble.h" #include "fds.h" #include "nrf_fstorage.h" #include "ble_conn_state.h" #include "nrf_ble_gatt.h" #include "nrf_ble_lesc.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" #include "nrf_ble_scan.h" #include "nrf_drv_clock.h" #define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */ #define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */ #define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */ #define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */ #define SEC_PARAM_BOND 1 /**< Perform bonding. */ #define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */ #define SEC_PARAM_LESC 1 /**< LE Secure Connections enabled. */ #define SEC_PARAM_KEYPRESS 0 /**< Keypress notifications not enabled. */ #define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */ #define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */ #define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size in octets. */ #define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size in octets. */ #define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */ #define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE /**< Target device uuid that application is looking for. */ /**@brief Macro to unpack 16bit unsigned UUID from octet stream. */ #define UUID16_EXTRACT(DST, SRC) \ do \ { \ (*(DST)) = (SRC)[1]; \ (*(DST)) <<= 8; \ (*(DST)) |= (SRC)[0]; \ } while (0) NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */ NRF_SDH_BLE_CENTRAL_LINK_COUNT, NRF_BLE_GQ_QUEUE_SIZE); BLE_HRS_C_DEF(m_hrs_c); /**< Structure used to identify the heart rate client module. */ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */ BLE_DB_DISCOVERY_DEF(m_db_disc); /**< DB discovery module instance. */ NRF_BLE_SCAN_DEF(m_scan); /**< Scanning module instance. */ APP_TIMER_DEF(m_repeated_timer_id); /**< Handler for repeated timer used to blink LED 1. */ static uint16_t m_conn_handle; /**< Current connection handle. */ static bool m_whitelist_disabled; /**< True if whitelist has been temporarily disabled. */ static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */ /**< Scan parameters requested for scanning and connection. */ static ble_gap_scan_params_t const m_scan_param = { .active = 0x01, #if (NRF_SD_BLE_API_VERSION > 7) .interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS, .window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS, #else .interval = NRF_BLE_SCAN_SCAN_INTERVAL, .window = NRF_BLE_SCAN_SCAN_WINDOW, #endif // (NRF_SD_BLE_API_VERSION > 7) .filter_policy = BLE_GAP_SCAN_FP_WHITELIST, .timeout = SCAN_DURATION_WITELIST, .scan_phys = BLE_GAP_PHY_1MBPS, }; /**@brief Names which the central applications will scan for, and which will be advertised by the peripherals. * if these are set to empty strings, the UUIDs defined below will be used */ static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */ static bool is_connect_per_addr = false; /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */ static ble_gap_addr_t const m_target_periph_addr = { /* Possible values for addr_type: BLE_GAP_ADDR_TYPE_PUBLIC, BLE_GAP_ADDR_TYPE_RANDOM_STATIC, BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE, BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */ .addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC, .addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9} }; static void scan_start(void); /**@brief Function for asserts in the SoftDevice. * * @details This function will be called in case of an assert in the SoftDevice. * * @warning This handler is an example only and does not fit a final product. You need to analyze * how your product is supposed to react in case of 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 handling the Heart Rate Service Client and Battery Service Client errors. * * @param[in] nrf_error Error code containing information about what went wrong. */ static void service_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } /**@brief Function for handling database discovery events. * * @details This function is callback function to handle events from the database discovery module. * Depending on the UUIDs that are discovered, this function should forward 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) { ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt); } /**@brief Function for handling Peer Manager events. * * @param[in] p_evt Peer Manager event. */ static void pm_evt_handler(pm_evt_t const * p_evt) { pm_handler_on_pm_evt(p_evt); pm_handler_flash_clean(p_evt); switch (p_evt->evt_id) { case PM_EVT_PEERS_DELETE_SUCCEEDED: // Bonds are deleted. Start scanning. scan_start(); break; default: break; } } /** * @brief Function for shutdown events. * * @param[in] event Shutdown type. */ static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) { ret_code_t err_code; err_code = bsp_indication_set(BSP_INDICATE_IDLE); APP_ERROR_CHECK(err_code); switch (event) { case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP: // Prepare wakeup buttons. err_code = bsp_btn_ble_sleep_mode_prepare(); APP_ERROR_CHECK(err_code); break; default: break; } return true; } NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY); /**@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; ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt; switch (p_ble_evt->header.evt_id) { case BLE_GAP_EVT_CONNECTED: { NRF_LOG_INFO("Connected."); // Discover peer's services. err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle); APP_ERROR_CHECK(err_code); //err_code = app_timer_start(m_repeated_timer_id, APP_TIMER_TICKS(1000), NULL); //vipul err_code = bsp_indication_set(BSP_INDICATE_CONNECTED); APP_ERROR_CHECK(err_code); if (ble_conn_state_central_conn_count() < NRF_SDH_BLE_CENTRAL_LINK_COUNT) { scan_start(); } } break; case BLE_GAP_EVT_DISCONNECTED: { NRF_LOG_INFO("Disconnected, reason 0x%x.", p_gap_evt->params.disconnected.reason); err_code = app_timer_stop(m_repeated_timer_id); err_code = bsp_indication_set(BSP_INDICATE_IDLE); APP_ERROR_CHECK(err_code); if (ble_conn_state_central_conn_count() < NRF_SDH_BLE_CENTRAL_LINK_COUNT) { scan_start(); } } break; case BLE_GAP_EVT_TIMEOUT: { if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) { NRF_LOG_INFO("Connection Request timed out."); } } break; case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: // Accepting 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; case BLE_GAP_EVT_SEC_PARAMS_REQUEST: NRF_LOG_DEBUG("BLE_GAP_EVT_SEC_PARAMS_REQUEST"); break; case BLE_GAP_EVT_AUTH_KEY_REQUEST: NRF_LOG_INFO("BLE_GAP_EVT_AUTH_KEY_REQUEST"); break; case BLE_GAP_EVT_LESC_DHKEY_REQUEST: NRF_LOG_INFO("BLE_GAP_EVT_LESC_DHKEY_REQUEST"); break; case BLE_GAP_EVT_AUTH_STATUS: NRF_LOG_INFO("BLE_GAP_EVT_AUTH_STATUS: status=0x%x bond=0x%x lv4: %d kdist_own:0x%x kdist_peer:0x%x", p_ble_evt->evt.gap_evt.params.auth_status.auth_status, p_ble_evt->evt.gap_evt.params.auth_status.bonded, p_ble_evt->evt.gap_evt.params.auth_status.sm1_levels.lv4, *((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_own), *((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_peer)); break; default: break; } } /**@brief SoftDevice SoC event handler. * * @param[in] evt_id SoC event. * @param[in] p_context Context. */ static void soc_evt_handler(uint32_t evt_id, void * p_context) { switch (evt_id) { case NRF_EVT_FLASH_OPERATION_SUCCESS: /* fall through */ case NRF_EVT_FLASH_OPERATION_ERROR: if (m_memory_access_in_progress) { m_memory_access_in_progress = false; scan_start(); } break; default: // No implementation needed. break; } } /**@brief Function for initializing the BLE stack. * * @details Initializes the SoftDevice and the BLE event interrupt. */ 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 handlers for BLE and SoC events. NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL); NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL); } /**@brief Function for the Peer Manager initialization. */ static void peer_manager_init(void) { ble_gap_sec_params_t sec_param; ret_code_t err_code; err_code = pm_init(); APP_ERROR_CHECK(err_code); memset(&sec_param, 0, sizeof(ble_gap_sec_params_t)); // Security parameters to be used for all security procedures. sec_param.bond = SEC_PARAM_BOND; sec_param.mitm = SEC_PARAM_MITM; sec_param.lesc = SEC_PARAM_LESC; sec_param.keypress = SEC_PARAM_KEYPRESS; sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES; sec_param.oob = SEC_PARAM_OOB; sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE; sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE; sec_param.kdist_own.enc = 1; sec_param.kdist_own.id = 1; sec_param.kdist_peer.enc = 1; sec_param.kdist_peer.id = 1; err_code = pm_sec_params_set(&sec_param); APP_ERROR_CHECK(err_code); err_code = pm_register(pm_evt_handler); APP_ERROR_CHECK(err_code); } /** @brief Clear bonding information from persistent storage */ static void delete_bonds(void) { ret_code_t err_code; NRF_LOG_INFO("Erase bonds!"); err_code = pm_peers_delete(); APP_ERROR_CHECK(err_code); } /**@brief Function for disabling the use of whitelist for scanning. */ static void whitelist_disable(void) { if (!m_whitelist_disabled) { NRF_LOG_INFO("Whitelist temporarily disabled."); m_whitelist_disabled = true; nrf_ble_scan_stop(); scan_start(); } } /**@brief Function for handling events from the BSP module. * * @param[in] event Event generated by button press. */ void bsp_event_handler(bsp_event_t event) { ret_code_t err_code; switch (event) { case BSP_EVENT_SLEEP: nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF); break; case BSP_EVENT_DISCONNECT: err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } break; case BSP_EVENT_WHITELIST_OFF: whitelist_disable(); break; default: break; } } /**@brief Heart Rate Collector Handler. */ static void hrs_c_evt_handler(ble_hrs_c_t * p_hrs_c, ble_hrs_c_evt_t * p_hrs_c_evt) { ret_code_t err_code; switch (p_hrs_c_evt->evt_type) { case BLE_HRS_C_EVT_DISCOVERY_COMPLETE: { NRF_LOG_DEBUG("Heart rate service discovered."); err_code = ble_hrs_c_handles_assign(p_hrs_c, p_hrs_c_evt->conn_handle, &p_hrs_c_evt->params.peer_db); APP_ERROR_CHECK(err_code); // Initiate bonding. err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false); if (err_code != NRF_ERROR_BUSY) { APP_ERROR_CHECK(err_code); } // Heart rate service discovered. Enable notification of Heart Rate Measurement. err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c); APP_ERROR_CHECK(err_code); } break; case BLE_HRS_C_EVT_HRM_NOTIFICATION: { NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value); if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0) { uint32_t rr_avg = 0; for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++) { rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i]; } rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt; NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg); } } break; default: break; } } /**@brief Timeout handler for the repeated timer. */ static void repeated_timer_handler(void * p_context) { // hrs_c_init(); ble_hrs_c_init_t hrs_c_init_obj; hrs_c_init_obj.evt_handler = hrs_c_evt_handler; hrs_c_init_obj.error_handler = service_error_handler; hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue; ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj); APP_ERROR_CHECK(err_code); } /**@brief Create timers. */ static void create_timers() { ret_code_t err_code; // Create timers err_code = app_timer_create(&m_repeated_timer_id, APP_TIMER_MODE_REPEATED, repeated_timer_handler); APP_ERROR_CHECK(err_code); } /** * @brief Battery level collector initialization. */ /** * @brief Database discovery collector initialization. */ static void db_discovery_init(void) { ble_db_discovery_init_t db_init; memset(&db_init, 0, sizeof(db_init)); db_init.evt_handler = db_disc_handler; db_init.p_gatt_queue = &m_ble_gatt_queue; ret_code_t err_code = ble_db_discovery_init(&db_init); APP_ERROR_CHECK(err_code); } /**@brief Retrieve a list of peer manager peer IDs. * * @param[inout] p_peers The buffer where to store the list of peer IDs. * @param[inout] p_size In: The size of the @p p_peers buffer. * Out: The number of peers copied in the buffer. */ static void peer_list_get(pm_peer_id_t * p_peers, uint32_t * p_size) { pm_peer_id_t peer_id; uint32_t peers_to_copy; peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ? *p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT; peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID); *p_size = 0; while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--)) { p_peers[(*p_size)++] = peer_id; peer_id = pm_next_peer_id_get(peer_id); } } static void whitelist_load() { ret_code_t ret; pm_peer_id_t peers[8]; uint32_t peer_cnt; memset(peers, PM_PEER_ID_INVALID, sizeof(peers)); peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t)); // Load all peers from flash and whitelist them. peer_list_get(peers, &peer_cnt); ret = pm_whitelist_set(peers, peer_cnt); APP_ERROR_CHECK(ret); // Setup the device identies list. // Some SoftDevices do not support this feature. ret = pm_device_identities_list_set(peers, peer_cnt); if (ret != NRF_ERROR_NOT_SUPPORTED) { APP_ERROR_CHECK(ret); } } static void on_whitelist_req(void) { ret_code_t err_code; // Whitelist buffers. ble_gap_addr_t whitelist_addrs[8]; ble_gap_irk_t whitelist_irks[8]; memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs)); memset(whitelist_irks, 0x00, sizeof(whitelist_irks)); uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t)); uint32_t irk_cnt = (sizeof(whitelist_irks) / sizeof(ble_gap_irk_t)); // Reload the whitelist and whitelist all peers. whitelist_load(); // Get the whitelist previously set using pm_whitelist_set(). err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt, whitelist_irks, &irk_cnt); if (((addr_cnt == 0) && (irk_cnt == 0)) || (m_whitelist_disabled)) { // Don't use whitelist. err_code = nrf_ble_scan_params_set(&m_scan, NULL); APP_ERROR_CHECK(err_code); } } /**@brief Function to start scanning. */ static void scan_start(void) { ret_code_t err_code; if (nrf_fstorage_is_busy(NULL)) { m_memory_access_in_progress = true; return; } NRF_LOG_INFO("Starting scan."); err_code = nrf_ble_scan_start(&m_scan); APP_ERROR_CHECK(err_code); err_code = bsp_indication_set(BSP_INDICATE_SCANNING); APP_ERROR_CHECK(err_code); } /**@brief Function for initializing buttons and leds. * * @param[out] p_erase_bonds Will be true if the clear bonding button was pressed to wake the application up. */ static void buttons_leds_init(bool * p_erase_bonds) { ret_code_t err_code; bsp_event_t startup_event; err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler); APP_ERROR_CHECK(err_code); err_code = bsp_btn_ble_init(NULL, &startup_event); APP_ERROR_CHECK(err_code); *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA); } /**@brief Function for initializing the nrf 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 power management module. */ static void power_management_init(void) { ret_code_t err_code; err_code = nrf_pwr_mgmt_init(); APP_ERROR_CHECK(err_code); } /**@brief GATT module event handler. */ static void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt) { switch (p_evt->evt_id) { case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED: { NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.", p_evt->conn_handle, p_evt->params.att_mtu_effective); } break; case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED: { NRF_LOG_INFO("Data length for connection 0x%x updated to %d.", p_evt->conn_handle, p_evt->params.data_length); } break; default: break; } } 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_WHITELIST_REQUEST: { on_whitelist_req(); m_whitelist_disabled = false; } break; case NRF_BLE_SCAN_EVT_CONNECTING_ERROR: { err_code = p_scan_evt->params.connecting_err.err_code; APP_ERROR_CHECK(err_code); } break; case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT: { NRF_LOG_INFO("Scan timed out."); scan_start(); } break; case NRF_BLE_SCAN_EVT_FILTER_MATCH: break; case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT: break; default: break; } } /**@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, gatt_evt_handler); APP_ERROR_CHECK(err_code); } /**@brief Function for initialization scanning and setting 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.p_scan_param = &m_scan_param; 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); ble_uuid_t uuid = { .uuid = TARGET_UUID, .type = BLE_UUID_TYPE_BLE, }; err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &uuid); APP_ERROR_CHECK(err_code); if (strlen(m_target_periph_name) != 0) { err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name); APP_ERROR_CHECK(err_code); } if (is_connect_per_addr) { err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_ADDR_FILTER, m_target_periph_addr.addr); APP_ERROR_CHECK(err_code); } err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_ALL_FILTER, false); APP_ERROR_CHECK(err_code); } /**@brief Function for handling the idle state (main loop). * * @details Handle any pending log operation(s), then sleep until the next event occurs. */ static void idle_state_handle(void) { ret_code_t err_code; err_code = nrf_ble_lesc_request_handler(); APP_ERROR_CHECK(err_code); NRF_LOG_FLUSH(); nrf_pwr_mgmt_run(); } /**@brief Function for starting a scan, or instead trigger it from peer manager (after * deleting bonds). * * @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning. */ void scanning_start(bool * p_erase_bonds) { // Start scanning for peripherals and initiate connection // with devices that advertise GATT Service UUID. if (*p_erase_bonds == true) { // Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event. delete_bonds(); } else { scan_start(); } } /**@brief Function starting the internal LFCLK oscillator. * * @details This is needed by RTC1 which is used by the Application Timer * (When SoftDevice is enabled the LFCLK is always running and this is not needed). */ static void lfclk_request(void) { ret_code_t err_code = nrf_drv_clock_init(); APP_ERROR_CHECK(err_code); nrf_drv_clock_lfclk_request(NULL); } int main(void) { bool erase_bonds; // Initialize. log_init(); timer_init(); lfclk_request(); power_management_init(); buttons_leds_init(&erase_bonds); ble_stack_init(); gatt_init(); peer_manager_init(); db_discovery_init(); // bas_c_init(); create_timers(); scan_init(); // Start execution. NRF_LOG_INFO("Heart Rate collector example started."); scanning_start(&erase_bonds); // Enter main loop. for (;;) { idle_state_handle(); } }