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/* 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 <stdint.h>
#include <string.h>
#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();
}
}
/**
* @}
*/
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