654 lines
23 KiB
C
654 lines
23 KiB
C
/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the license.txt file.
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*/
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/** @file
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* @brief UART over BLE application using the app_uart library (event driven).
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*
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* This UART example is configured with flow control enabled which is necessary when softdevice
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* is enabled, in order to prevent data loss. To connect the development kit with your PC via
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* UART, connect the configured RXD, TXD, RTS and CTS pins to the RXD, TXD, RTS and CTS pins
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* on header P15 on the motherboard. Then connect the RS232 port on the nRFgo motherboard to
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* your PC. Configuration for UART pins is defined in the uart_conf.h header file.
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*
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* This file contains source code for a sample application that uses the Nordic UART service.
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* Connect to the UART example via Master Control Panel and the PCA10000 USB dongle, or via
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* nRF UART 2.0 app for Android, or nRF UART app for IOS, available on
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* https://www.nordicsemi.com/Products/nRFready-Demo-APPS.
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*
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* This example should be operated in the same way as the UART example for the evaluation board
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* in the SDK. Follow the same guide for this example, given on:
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* https://devzone.nordicsemi.com/documentation/nrf51/6.0.0/s110/html/a00066.html#project_uart_nus_eval_test
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*
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* This example uses FIFO RX and FIFO TX buffer to operate with the UART. You can set the size
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* for the FIFO buffers by modifying the RX_BUFFER_SIZE and TX_BUFFER_SIZE constants.
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*
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* Documentation for the app_uart library is given in UART driver documentation in the SDK at:
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* https://devzone.nordicsemi.com/documentation/nrf51/6.1.0/s110/html/a00008.html
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*/
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/** @file
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*
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* @defgroup ble_sdk_uart_over_ble_main main.c
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* @{
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* @ingroup ble_sdk_app_nus_eval
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* @brief UART over BLE application main file.
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*
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* This file contains the source code for a sample application that uses the Nordic UART service.
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* This application uses the @ref srvlib_conn_params module.
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*/
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#include <stdint.h>
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#include <string.h>
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#include "nordic_common.h"
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#include "nrf.h"
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#include "nrf51_bitfields.h"
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#include "ble_hci.h"
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#include "ble_advdata.h"
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#include "ble_conn_params.h"
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#include "softdevice_handler.h"
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#include "app_timer.h"
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#include "app_button.h"
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#include "ble_nus.h"
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#include "app_uart.h"
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#include "uart_conf.h"
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#include "boards.h"
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#include "ble_error_log.h"
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#include "ble_debug_assert_handler.h"
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#include "app_util_platform.h"
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#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*/
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#define WAKEUP_BUTTON_PIN BUTTON_0 /**< Button used to wake up the application. */
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#define ADVERTISING_LED_PIN_NO LED_0 /**< LED to indicate advertising state. */
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#define CONNECTED_LED_PIN_NO LED_1 /**< LED to indicate connected state. */
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#define DEVICE_NAME "MY_UART" /**< Name of device. Will be included in the advertising data. */
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#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */
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#define APP_ADV_TIMEOUT_IN_SECONDS 180 /**< The advertising timeout (in units of seconds). */
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#define APP_TIMER_PRESCALER 0 /**< Value of the RTC1 PRESCALER register. */
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#define APP_TIMER_MAX_TIMERS 2 /**< Maximum number of simultaneously created timers. */
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#define APP_TIMER_OP_QUEUE_SIZE 4 /**< Size of timer operation queues. */
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#define MIN_CONN_INTERVAL 7.5 /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
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#define MAX_CONN_INTERVAL 60 /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
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#define SLAVE_LATENCY 0 /**< slave latency. */
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#define CONN_SUP_TIMEOUT 400 /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
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#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). */
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#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). */
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#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
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#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). */
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#define SEC_PARAM_TIMEOUT 30 /**< Timeout for Pairing Request or Security Request (in seconds). */
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#define SEC_PARAM_BOND 1 /**< Perform bonding. */
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#define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */
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#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
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#define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */
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#define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size. */
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#define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size. */
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#define START_STRING "Start...\n" /**< The string that will be sent over the UART when the application starts. */
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#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
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#define APP_GPIOTE_MAX_USERS 1
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static ble_gap_sec_params_t m_sec_params; /**< Security requirements for this application. */
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static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
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static ble_nus_t m_nus; /**< Structure to identify the Nordic UART Service. */
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static bool ble_buffer_available = true;
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static bool tx_complete = false;
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/**@brief Error handler function, which is called when an error has occurred.
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*
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* @warning This handler is an example only and does not fit a final product. You need to analyze
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* how your product is supposed to react in case of error.
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*
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* @param[in] error_code Error code supplied to the handler.
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* @param[in] line_num Line number where the handler is called.
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* @param[in] p_file_name Pointer to the file name.
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*/
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void uart_putstring(const uint8_t * str);
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void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name)
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{
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// This call can be used for debug purposes during application development.
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// @note CAUTION: Activating this code will write the stack to flash on an error.
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// This function should NOT be used in a final product.
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// It is intended STRICTLY for development/debugging purposes.
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// The flash write will happen EVEN if the radio is active, thus interrupting
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// any communication.
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// Use with care. Un-comment the line below to use.
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//ble_debug_assert_handler(error_code, line_num, p_file_name);
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// On assert, the system can only recover with a reset.
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NVIC_SystemReset();
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}
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/**@brief Assert macro callback function.
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*
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* @details This function will be called in case of an assert in the SoftDevice.
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*
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* @warning This handler is an example only and does not fit a final product. You need to
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* analyze how your product is supposed to react in case of Assert.
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* @warning On assert from the SoftDevice, the system can only recover on reset.
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*
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* @param[in] line_num Line number of the failing ASSERT call.
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* @param[in] file_name File name of the failing ASSERT call.
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*/
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void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
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{
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app_error_handler(DEAD_BEEF, line_num, p_file_name);
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}
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/**@brief Function for the LEDs initialization.
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*
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* @details Initializes all LEDs used by this application.
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*/
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static void leds_init(void)
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{
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nrf_gpio_cfg_output(ADVERTISING_LED_PIN_NO);
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nrf_gpio_cfg_output(CONNECTED_LED_PIN_NO);
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}
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/**@brief Function for Timer initialization.
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*
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* @details Initializes the timer module.
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*/
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static void timers_init(void)
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{
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// Initialize timer module
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APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
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}
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/**@brief Function for the GAP initialization.
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*
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* @details This function will setup all the necessary GAP (Generic Access Profile)
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* parameters of the device. It also sets the permissions and appearance.
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*/
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static void gap_params_init(void)
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{
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uint32_t err_code;
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ble_gap_conn_params_t gap_conn_params;
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ble_gap_conn_sec_mode_t sec_mode;
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
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err_code = sd_ble_gap_device_name_set(&sec_mode,
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(const uint8_t *) DEVICE_NAME,
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strlen(DEVICE_NAME));
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APP_ERROR_CHECK(err_code);
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memset(&gap_conn_params, 0, sizeof(gap_conn_params));
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gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
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gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
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gap_conn_params.slave_latency = SLAVE_LATENCY;
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gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
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err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for the Advertising functionality initialization.
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*
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* @details Encodes the required advertising data and passes it to the stack.
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* Also builds a structure to be passed to the stack when starting advertising.
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*/
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static void advertising_init(void)
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{
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char buf[80];
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uint32_t err_code;
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ble_advdata_t advdata;
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//ble_advdata_t scanrsp;
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uint8_t flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
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ble_uuid_t adv_uuids[] = {{BLE_UUID_NUS_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN}};
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memset(&advdata, 0, sizeof(advdata));
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advdata.name_type = BLE_ADVDATA_FULL_NAME;
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advdata.include_appearance = false;
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advdata.flags.size = sizeof(flags);
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advdata.flags.p_data = &flags;
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//memset(&scanrsp, 0, sizeof(scanrsp));
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advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
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advdata.uuids_complete.p_uuids = adv_uuids;
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//err_code = ble_advdata_set(&advdata, &scanrsp);
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err_code = ble_advdata_set(&advdata, NULL);
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//printf("err code : %s\n","prout");
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snprintf(buf, sizeof(buf), "err : %u\n", (unsigned int)err_code);
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uart_putstring((const uint8_t*)buf);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for handling the data from the Nordic UART Service.
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*
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* @details This function will process the data received from the Nordic UART BLE Service and send
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* it to the UART module.
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*/
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/**@snippet [Handling the data received over BLE] */
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void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
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{
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for (int i = 0; i < length; i++)
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{
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app_uart_put(p_data[i]);
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}
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app_uart_put('\n');
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}
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/**@snippet [Handling the data received over BLE] */
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/**@brief Function for initializing services that will be used by the application.
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*/
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static void services_init(void)
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{
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uint32_t err_code;
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ble_nus_init_t nus_init;
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memset(&nus_init, 0, sizeof(nus_init));
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nus_init.data_handler = nus_data_handler;
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err_code = ble_nus_init(&m_nus, &nus_init);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for initializing security parameters.
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*/
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static void sec_params_init(void)
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{
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m_sec_params.timeout = SEC_PARAM_TIMEOUT;
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m_sec_params.bond = SEC_PARAM_BOND;
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m_sec_params.mitm = SEC_PARAM_MITM;
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m_sec_params.io_caps = SEC_PARAM_IO_CAPABILITIES;
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m_sec_params.oob = SEC_PARAM_OOB;
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m_sec_params.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
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m_sec_params.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
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}
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/**@brief Function for handling an event from the Connection Parameters Module.
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*
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* @details This function will be called for all events in the Connection Parameters Module
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* which are passed to the application.
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*
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* @note All this function does is to disconnect. This could have been done by simply setting
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* the disconnect_on_fail config parameter, but instead we use the event handler
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* mechanism to demonstrate its use.
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*
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* @param[in] p_evt Event received from the Connection Parameters Module.
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*/
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static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
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{
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uint32_t err_code;
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if(p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
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{
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err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
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APP_ERROR_CHECK(err_code);
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}
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}
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/**@brief Function for handling errors from the Connection Parameters module.
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*
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* @param[in] nrf_error Error code containing information about what went wrong.
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*/
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static void conn_params_error_handler(uint32_t nrf_error)
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{
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APP_ERROR_HANDLER(nrf_error);
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}
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/**@brief Function for initializing the Connection Parameters module.
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*/
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static void conn_params_init(void)
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{
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uint32_t err_code;
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ble_conn_params_init_t cp_init;
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memset(&cp_init, 0, sizeof(cp_init));
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cp_init.p_conn_params = NULL;
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cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
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cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
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cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
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cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
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cp_init.disconnect_on_fail = false;
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cp_init.evt_handler = on_conn_params_evt;
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cp_init.error_handler = conn_params_error_handler;
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err_code = ble_conn_params_init(&cp_init);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for starting advertising.
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*/
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static void advertising_start(void)
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{
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uint32_t err_code;
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ble_gap_adv_params_t adv_params;
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// Start advertising
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memset(&adv_params, 0, sizeof(adv_params));
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adv_params.type = BLE_GAP_ADV_TYPE_ADV_IND;
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adv_params.p_peer_addr = NULL;
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adv_params.fp = BLE_GAP_ADV_FP_ANY;
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adv_params.interval = APP_ADV_INTERVAL;
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adv_params.timeout = APP_ADV_TIMEOUT_IN_SECONDS;
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err_code = sd_ble_gap_adv_start(&adv_params);
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APP_ERROR_CHECK(err_code);
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nrf_gpio_pin_set(ADVERTISING_LED_PIN_NO);
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}
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/**@brief Function for the Application's S110 SoftDevice event handler.
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*
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* @param[in] p_ble_evt S110 SoftDevice event.
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*/
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static void on_ble_evt(ble_evt_t * p_ble_evt)
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{
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uint32_t err_code;
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static ble_gap_evt_auth_status_t m_auth_status;
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ble_gap_enc_info_t * p_enc_info;
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uart_putstring(( const uint8_t *)"on_ble_evt\n" ) ;
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switch (p_ble_evt->header.evt_id)
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{
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case BLE_GAP_EVT_CONNECTED:
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nrf_gpio_pin_set(CONNECTED_LED_PIN_NO);
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nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
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m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
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break;
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case BLE_GAP_EVT_DISCONNECTED:
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nrf_gpio_pin_clear(CONNECTED_LED_PIN_NO);
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m_conn_handle = BLE_CONN_HANDLE_INVALID;
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advertising_start();
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break;
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case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
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err_code = sd_ble_gap_sec_params_reply(m_conn_handle,
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BLE_GAP_SEC_STATUS_SUCCESS,
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&m_sec_params);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GATTS_EVT_SYS_ATTR_MISSING:
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err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GAP_EVT_AUTH_STATUS:
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m_auth_status = p_ble_evt->evt.gap_evt.params.auth_status;
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break;
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case BLE_GAP_EVT_SEC_INFO_REQUEST:
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p_enc_info = &m_auth_status.periph_keys.enc_info;
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if (p_enc_info->div == p_ble_evt->evt.gap_evt.params.sec_info_request.div)
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{
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err_code = sd_ble_gap_sec_info_reply(m_conn_handle, p_enc_info, NULL);
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APP_ERROR_CHECK(err_code);
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}
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else
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{
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// No keys found for this device
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err_code = sd_ble_gap_sec_info_reply(m_conn_handle, NULL, NULL);
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APP_ERROR_CHECK(err_code);
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}
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break;
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case BLE_GAP_EVT_TIMEOUT:
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if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT)
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{
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nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
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// Configure buttons with sense level low as wakeup source.
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nrf_gpio_cfg_sense_input(WAKEUP_BUTTON_PIN,
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BUTTON_PULL,
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NRF_GPIO_PIN_SENSE_LOW);
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// Go to system-off mode (this function will not return; wakeup will cause a reset)
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err_code = sd_power_system_off();
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APP_ERROR_CHECK(err_code);
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|
}
|
|
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();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|