/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved. * * Use of this source code is governed by a BSD-style license that can be * found in the license.txt file. */ /** @file * @brief UART over BLE application using the app_uart library (event driven). * * This UART example is configured with flow control enabled which is necessary when softdevice * is enabled, in order to prevent data loss. To connect the development kit with your PC via * UART, connect the configured RXD, TXD, RTS and CTS pins to the RXD, TXD, RTS and CTS pins * on header P15 on the motherboard. Then connect the RS232 port on the nRFgo motherboard to * your PC. Configuration for UART pins is defined in the uart_conf.h header file. * * This file contains source code for a sample application that uses the Nordic UART service. * Connect to the UART example via Master Control Panel and the PCA10000 USB dongle, or via * nRF UART 2.0 app for Android, or nRF UART app for IOS, available on * https://www.nordicsemi.com/Products/nRFready-Demo-APPS. * * This example should be operated in the same way as the UART example for the evaluation board * in the SDK. Follow the same guide for this example, given on: * https://devzone.nordicsemi.com/documentation/nrf51/6.0.0/s110/html/a00066.html#project_uart_nus_eval_test * * This example uses FIFO RX and FIFO TX buffer to operate with the UART. You can set the size * for the FIFO buffers by modifying the RX_BUFFER_SIZE and TX_BUFFER_SIZE constants. * * Documentation for the app_uart library is given in UART driver documentation in the SDK at: * https://devzone.nordicsemi.com/documentation/nrf51/6.1.0/s110/html/a00008.html */ /** @file * * @defgroup ble_sdk_uart_over_ble_main main.c * @{ * @ingroup ble_sdk_app_nus_eval * @brief UART over BLE application main file. * * This file contains the source code for a sample application that uses the Nordic UART service. * This application uses the @ref srvlib_conn_params module. */ #include #include #include "nordic_common.h" #include "nrf.h" #include "nrf51_bitfields.h" #include "ble_hci.h" #include "ble_advdata.h" #include "ble_conn_params.h" #include "softdevice_handler.h" #include "app_timer.h" #include "app_button.h" #include "ble_nus.h" #include "app_uart.h" #include "uart_conf.h" #include "boards.h" #include "ble_error_log.h" #include "ble_debug_assert_handler.h" #include "app_util_platform.h" #define IS_SRVC_CHANGED_CHARACT_PRESENT 0 /**< Include or not the service_changed characteristic. if not enabled, the server's database cannot be changed for the lifetime of the device*/ #define WAKEUP_BUTTON_PIN BUTTON_0 /**< Button used to wake up the application. */ #define ADVERTISING_LED_PIN_NO LED_0 /**< LED to indicate advertising state. */ #define CONNECTED_LED_PIN_NO LED_1 /**< LED to indicate connected state. */ #define DEVICE_NAME "MY_UART" /**< Name of device. Will be included in the advertising data. */ #define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */ #define APP_ADV_TIMEOUT_IN_SECONDS 180 /**< The advertising timeout (in units of seconds). */ #define APP_TIMER_PRESCALER 0 /**< Value of the RTC1 PRESCALER register. */ #define APP_TIMER_MAX_TIMERS 2 /**< Maximum number of simultaneously created timers. */ #define APP_TIMER_OP_QUEUE_SIZE 4 /**< Size of timer operation queues. */ #define MIN_CONN_INTERVAL 7.5 /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL 60 /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< slave latency. */ #define CONN_SUP_TIMEOUT 400 /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000, APP_TIMER_PRESCALER) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */ #define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50, APP_TIMER_PRESCALER) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */ #define SEC_PARAM_TIMEOUT 30 /**< Timeout for Pairing Request or Security Request (in seconds). */ #define SEC_PARAM_BOND 1 /**< Perform bonding. */ #define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */ #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. */ #define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size. */ #define START_STRING "Start...\n" /**< The string that will be sent over the UART when the application starts. */ #define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */ #define APP_GPIOTE_MAX_USERS 1 static ble_gap_sec_params_t m_sec_params; /**< Security requirements for this application. */ static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */ static ble_nus_t m_nus; /**< Structure to identify the Nordic UART Service. */ static bool ble_buffer_available = true; static bool tx_complete = false; /**@brief Error handler function, which is called when an error has occurred. * * @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 error. * * @param[in] error_code Error code supplied to the handler. * @param[in] line_num Line number where the handler is called. * @param[in] p_file_name Pointer to the file name. */ void uart_putstring(const uint8_t * str); void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name) { // This call can be used for debug purposes during application development. // @note CAUTION: Activating this code will write the stack to flash on an error. // This function should NOT be used in a final product. // It is intended STRICTLY for development/debugging purposes. // The flash write will happen EVEN if the radio is active, thus interrupting // any communication. // Use with care. Un-comment the line below to use. //ble_debug_assert_handler(error_code, line_num, p_file_name); // On assert, the system can only recover with a reset. NVIC_SystemReset(); } /**@brief Assert macro callback function. * * @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] 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(DEAD_BEEF, line_num, p_file_name); } /**@brief Function for the LEDs initialization. * * @details Initializes all LEDs used by this application. */ static void leds_init(void) { nrf_gpio_cfg_output(ADVERTISING_LED_PIN_NO); nrf_gpio_cfg_output(CONNECTED_LED_PIN_NO); } /**@brief Function for Timer initialization. * * @details Initializes the timer module. */ static void timers_init(void) { // Initialize timer module APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false); } /**@brief Function for the GAP initialization. * * @details This function will setup all the necessary GAP (Generic Access Profile) * parameters of the device. It also sets the permissions and appearance. */ static void gap_params_init(void) { uint32_t err_code; ble_gap_conn_params_t gap_conn_params; ble_gap_conn_sec_mode_t sec_mode; BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode); err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *) DEVICE_NAME, strlen(DEVICE_NAME)); APP_ERROR_CHECK(err_code); memset(&gap_conn_params, 0, sizeof(gap_conn_params)); gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL; gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL; gap_conn_params.slave_latency = SLAVE_LATENCY; gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT; err_code = sd_ble_gap_ppcp_set(&gap_conn_params); APP_ERROR_CHECK(err_code); } /**@brief Function for the Advertising functionality initialization. * * @details Encodes the required advertising data and passes it to the stack. * Also builds a structure to be passed to the stack when starting advertising. */ static void advertising_init(void) { char buf[80]; uint32_t err_code; ble_advdata_t advdata; //ble_advdata_t scanrsp; uint8_t flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE; ble_uuid_t adv_uuids[] = {{BLE_UUID_NUS_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN}}; memset(&advdata, 0, sizeof(advdata)); advdata.name_type = BLE_ADVDATA_FULL_NAME; advdata.include_appearance = false; advdata.flags.size = sizeof(flags); advdata.flags.p_data = &flags; //memset(&scanrsp, 0, sizeof(scanrsp)); advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]); advdata.uuids_complete.p_uuids = adv_uuids; //err_code = ble_advdata_set(&advdata, &scanrsp); err_code = ble_advdata_set(&advdata, NULL); //printf("err code : %s\n","prout"); snprintf(buf, sizeof(buf), "err : %u\n", (unsigned int)err_code); uart_putstring((const uint8_t*)buf); APP_ERROR_CHECK(err_code); } /**@brief Function for handling the data from the Nordic UART Service. * * @details This function will process the data received from the Nordic UART BLE Service and send * it to the UART module. */ /**@snippet [Handling the data received over BLE] */ void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length) { for (int i = 0; i < length; i++) { app_uart_put(p_data[i]); } app_uart_put('\n'); } /**@snippet [Handling the data received over BLE] */ /**@brief Function for initializing services that will be used by the application. */ static void services_init(void) { uint32_t err_code; ble_nus_init_t nus_init; memset(&nus_init, 0, sizeof(nus_init)); nus_init.data_handler = nus_data_handler; err_code = ble_nus_init(&m_nus, &nus_init); APP_ERROR_CHECK(err_code); } /**@brief Function for initializing security parameters. */ static void sec_params_init(void) { m_sec_params.timeout = SEC_PARAM_TIMEOUT; m_sec_params.bond = SEC_PARAM_BOND; m_sec_params.mitm = SEC_PARAM_MITM; m_sec_params.io_caps = SEC_PARAM_IO_CAPABILITIES; m_sec_params.oob = SEC_PARAM_OOB; m_sec_params.min_key_size = SEC_PARAM_MIN_KEY_SIZE; m_sec_params.max_key_size = SEC_PARAM_MAX_KEY_SIZE; } /**@brief Function for handling an event from the Connection Parameters Module. * * @details This function will be called for all events in the Connection Parameters Module * which are passed to the application. * * @note All this function does is to disconnect. This could have been done by simply setting * the disconnect_on_fail config parameter, but instead we use the event handler * mechanism to demonstrate its use. * * @param[in] p_evt Event received from the Connection Parameters Module. */ static void on_conn_params_evt(ble_conn_params_evt_t * p_evt) { uint32_t err_code; if(p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) { err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE); APP_ERROR_CHECK(err_code); } } /**@brief Function for handling errors from the Connection Parameters module. * * @param[in] nrf_error Error code containing information about what went wrong. */ static void conn_params_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } /**@brief Function for initializing the Connection Parameters module. */ static void conn_params_init(void) { uint32_t err_code; ble_conn_params_init_t cp_init; memset(&cp_init, 0, sizeof(cp_init)); cp_init.p_conn_params = NULL; cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY; cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY; cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT; cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID; cp_init.disconnect_on_fail = false; cp_init.evt_handler = on_conn_params_evt; cp_init.error_handler = conn_params_error_handler; err_code = ble_conn_params_init(&cp_init); APP_ERROR_CHECK(err_code); } /**@brief Function for starting advertising. */ static void advertising_start(void) { uint32_t err_code; ble_gap_adv_params_t adv_params; // Start advertising memset(&adv_params, 0, sizeof(adv_params)); adv_params.type = BLE_GAP_ADV_TYPE_ADV_IND; adv_params.p_peer_addr = NULL; adv_params.fp = BLE_GAP_ADV_FP_ANY; adv_params.interval = APP_ADV_INTERVAL; adv_params.timeout = APP_ADV_TIMEOUT_IN_SECONDS; err_code = sd_ble_gap_adv_start(&adv_params); APP_ERROR_CHECK(err_code); nrf_gpio_pin_set(ADVERTISING_LED_PIN_NO); } /**@brief Function for the Application's S110 SoftDevice event handler. * * @param[in] p_ble_evt S110 SoftDevice event. */ static void on_ble_evt(ble_evt_t * p_ble_evt) { uint32_t err_code; static ble_gap_evt_auth_status_t m_auth_status; ble_gap_enc_info_t * p_enc_info; uart_putstring(( const uint8_t *)"on_ble_evt\n" ) ; switch (p_ble_evt->header.evt_id) { case BLE_GAP_EVT_CONNECTED: nrf_gpio_pin_set(CONNECTED_LED_PIN_NO); nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO); m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle; break; case BLE_GAP_EVT_DISCONNECTED: nrf_gpio_pin_clear(CONNECTED_LED_PIN_NO); m_conn_handle = BLE_CONN_HANDLE_INVALID; advertising_start(); break; case BLE_GAP_EVT_SEC_PARAMS_REQUEST: err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_SUCCESS, &m_sec_params); APP_ERROR_CHECK(err_code); break; case BLE_GATTS_EVT_SYS_ATTR_MISSING: err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0); APP_ERROR_CHECK(err_code); break; case BLE_GAP_EVT_AUTH_STATUS: m_auth_status = p_ble_evt->evt.gap_evt.params.auth_status; break; case BLE_GAP_EVT_SEC_INFO_REQUEST: p_enc_info = &m_auth_status.periph_keys.enc_info; if (p_enc_info->div == p_ble_evt->evt.gap_evt.params.sec_info_request.div) { err_code = sd_ble_gap_sec_info_reply(m_conn_handle, p_enc_info, NULL); APP_ERROR_CHECK(err_code); } else { // No keys found for this device err_code = sd_ble_gap_sec_info_reply(m_conn_handle, NULL, NULL); APP_ERROR_CHECK(err_code); } break; case BLE_GAP_EVT_TIMEOUT: if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT) { nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO); // Configure buttons with sense level low as wakeup source. nrf_gpio_cfg_sense_input(WAKEUP_BUTTON_PIN, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW); // Go to system-off mode (this function will not return; wakeup will cause a reset) err_code = sd_power_system_off(); APP_ERROR_CHECK(err_code); } break; case BLE_EVT_TX_COMPLETE: if(!ble_buffer_available) tx_complete = true; break; default: // No implementation needed. break; } } /**@brief Function for dispatching a S110 SoftDevice event to all modules with a S110 * SoftDevice event handler. * * @details This function is called from the S110 SoftDevice event interrupt handler after a * S110 SoftDevice event has been received. * * @param[in] p_ble_evt S110 SoftDevice event. */ static void ble_evt_dispatch(ble_evt_t * p_ble_evt) { ble_conn_params_on_ble_evt(p_ble_evt); ble_nus_on_ble_evt(&m_nus, p_ble_evt); on_ble_evt(p_ble_evt); } /**@brief Function for the S110 SoftDevice initialization. * * @details This function initializes the S110 SoftDevice and the BLE event interrupt. */ static void ble_stack_init(void) { uint32_t err_code; // Initialize SoftDevice. SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false); // Enable BLE stack ble_enable_params_t ble_enable_params; memset(&ble_enable_params, 0, sizeof(ble_enable_params)); ble_enable_params.gatts_enable_params.service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT; err_code = sd_ble_enable(&ble_enable_params); APP_ERROR_CHECK(err_code); // Subscribe for BLE events. err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch); APP_ERROR_CHECK(err_code); } /**@brief Function for configuring the buttons. */ static void buttons_init(void) { nrf_gpio_cfg_sense_input(WAKEUP_BUTTON_PIN, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW); } /**@brief Function for placing the application in low power state while waiting for events. */ static void power_manage(void) { uint32_t err_code = sd_app_evt_wait(); APP_ERROR_CHECK(err_code); } void uart_putstring(const uint8_t * str) { uint32_t err_code; uint8_t len = strlen((char *) str); for (uint8_t i = 0; i < len; i++) { err_code = app_uart_put(str[i]); APP_ERROR_CHECK(err_code); } } /**@brief Function for handling UART interrupts. * * @details This function will receive a single character from the UART and append it to a string. * The string will be be sent over BLE when the last character received was a 'new line' * i.e '\n' (hex 0x0D) or if the string has reached a length of @ref NUS_MAX_DATA_LENGTH. */ void uart_evt_callback(app_uart_evt_t * uart_evt) { //uint32_t err_code; switch (uart_evt->evt_type) { case APP_UART_DATA: //Data is ready on the UART break; case APP_UART_DATA_READY: //Data is ready on the UART FIFO break; case APP_UART_TX_EMPTY: //Data has been successfully transmitted on the UART break; default: break; } } /**@brief Function for initializing the UART module. */ static void uart_init(void) { uint32_t err_code; APP_UART_FIFO_INIT(&comm_params, RX_BUF_SIZE, TX_BUF_SIZE, uart_evt_callback, UART_IRQ_PRIORITY, err_code); APP_ERROR_CHECK(err_code); } bool ble_attempt_to_send(uint8_t * data, uint8_t length) { uint32_t err_code; err_code = ble_nus_send_string(&m_nus, data,length); if(err_code == BLE_ERROR_NO_TX_BUFFERS) { /* ble tx buffer full*/ return false; } else if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } return true; } /**@brief Application main function. */ int main(void) { static uint8_t data_array[BLE_NUS_MAX_DATA_LEN]; static uint8_t index = 0; uint8_t newbyte; // Initialize leds_init(); timers_init(); buttons_init(); uart_init(); uart_putstring((const uint8_t *)"Hello\n"); ble_stack_init(); gap_params_init(); services_init(); advertising_init(); conn_params_init(); sec_params_init(); uart_putstring((const uint8_t *)START_STRING); advertising_start(); uart_putstring((const uint8_t*)"Start Loop\n"); // Enter main loop for (;;) { /*Stop reading new data if there are no ble buffers available */ if(ble_buffer_available) { if(app_uart_get(&newbyte) == NRF_SUCCESS) { data_array[index++] = newbyte; if (index >= (BLE_NUS_MAX_DATA_LEN)) { ble_buffer_available=ble_attempt_to_send(&data_array[0],index); if(ble_buffer_available) index=0; } } } /* Re-transmission if ble_buffer_available was set to false*/ if(tx_complete) { tx_complete=false; ble_buffer_available=ble_attempt_to_send(&data_array[0],index); if(ble_buffer_available) index =0; } power_manage(); } } /** * @} */