unwanted Signal on Port Pin 0.7

[ruetten]

Hello,

we have an custom made board with a module from raytec MDBT42q.

Our application based on the nus example.

On port 0.7 we have a led.

It seems, that there is maybe a debug function in the softdevice stack??

  log_init();

  nrf_delay_ms(500);

  timer_init();
 //  uart_init();
  buttons_leds_init();

#ifndef NO_BLE
  db_discovery_init();
  power_management_init();
  ble_stack_init();
  gatt_init();
  nus_c_init();
  scan_init();
  scan_start();
#endif

  SysTick_Config(SystemCoreClock / 1000);

  InitIo();

  SetPower(0);
  SetPower(1);

  LedCheck(1);

  // Enter main loop.
  for (;;) {

    // Statemachine();

    //  idle_state_handle();
  }

All parts of our code are deactivated, but the led is still blinking on a long aperiodic time.

Any Idea from wich part of the stack this came from ?

Andreas

[Jørgen Holmefjord]

Hi,

The Softdevice should not configure any GPIOs for debug pin toggling. If the pin is driven, something in your application must be driving it.

By default, the P0.07 pin is used for UART CTS pin on nRF52840 DK. Can you verify that the UART(E) PSEL.CTS register is not configured to use this pin?

If you can post your full application, we may also help to check if anything in the code will configure this pin.

Best regards,
Jørgen

[ruetten]

// LEDs definitions for PCA10040
#define LEDS_NUMBER    10

#define POWER_PIN      2
#define LED_START      17
#define LED_1          7
#define LED_2          9
#define LED_3          11
#define LED_4          30
#define LED_5          28
#define LED_6          27
#define LED_7          29
#define LED_8          31
#define LED_9          10
#define LED_10         8
#define LED_STOP       8

#define LEDS_ACTIVE_STATE 0

#define LEDS_INV_MASK  LEDS_MASK

#define LEDS_LIST { LED_1, LED_2, LED_3, LED_4, LED_5, LED_6, LED_7, LED_8, LED_9, LED_10}

#define BSP_LED_0      LED_14
#define BSP_LED_1      LED_15
#define BSP_LED_2      LED_16
#define BSP_LED_3      LED_4
#define BSP_LED_4      LED_5
#define BSP_LED_5      LED_6
#define BSP_LED_6      LED_7
#define BSP_LED_7      LED_8
#define BSP_LED_8      LED_9
#define BSP_LED_9      LED_10

#define BUTTONS_NUMBER 7

#define BUTTON_START   25
#define BUTTON_1       25
#define BUTTON_2       26
#define BUTTON_3       6
#define BUTTON_4       5
#define BUTTON_5       3
#define BUTTON_6       17
#define BUTTON_7       13
#define BUTTON_STOP    13
#define BUTTON_PULL    NRF_GPIO_PIN_PULLUP

#define BUTTONS_ACTIVE_STATE 0

#define BUTTONS_LIST { BUTTON_1, BUTTON_2, BUTTON_3, BUTTON_4, BUTTON_5, BUTTON_6, BUTTON_7 }

#define BSP_BUTTON_0   BUTTON_1
#define BSP_BUTTON_1   BUTTON_2
#define BSP_BUTTON_2   BUTTON_3
#define BSP_BUTTON_3   BUTTON_4
#define BSP_BUTTON_4   BUTTON_5
#define BSP_BUTTON_5   BUTTON_6
#define BSP_BUTTON_6   BUTTON_7

#define RX_PIN_NUMBER  19
#define TX_PIN_NUMBER  20
#define CTS_PIN_NUMBER 18
#define RTS_PIN_NUMBER 22
#define HWFC           true

[ruetten]

Hi,

as is see, in the  pca10040.h , there are no definition on p0.7

The only defined value for port 0.7 is the Led1.

Andreas

[Jørgen Holmefjord]

The board headers looks fine, but there could still be something in your application driving the pin.

If you can upload the full application, I can try to help you debug it.

[ruetten]

Hi,

the UART(E) PSEL.CTS register   are both 0xffffffff.

If i take out my programm of the main loop, nothing changes ....

The IO7 ist mostly High with  periodically  low phases with exact 400ms.

If the device is connected this behavior will disappear.

#include "app_error.h"
#include "app_timer.h"
#include "app_uart.h"
#include "app_util.h"
#include "ble.h"
#include "ble_db_discovery.h"
#include "ble_gap.h"
#include "ble_hci.h"
#include "ble_nus_c.h"
#include "bsp_btn_ble.h"
#include "nordic_common.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_scan.h"
#include "nrf_delay.h"
#include "nrf_drv_systick.h"
#include "nrf_drv_timer.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "defs.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>



#define APP_BLE_CONN_CFG_TAG 1  /**< Tag that refers to the BLE stack configuration set with @ref sd_ble_cfg_set. The default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
#define APP_BLE_OBSERVER_PRIO 3 /**< BLE observer priority of the application. There is no need to modify this value. */

#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */

#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */

#define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service (NUS) back to the sender. */

BLE_NUS_C_DEF(m_ble_nus_c);      /**< BLE Nordic UART Service (NUS) client instance. */
NRF_BLE_GATT_DEF(m_gatt);        /**< GATT module instance. */
BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instance. */
NRF_BLE_SCAN_DEF(m_scan);        /**< Scanning Module instance. */
NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
    NRF_SDH_BLE_CENTRAL_LINK_COUNT,
    NRF_BLE_GQ_QUEUE_SIZE);

static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */

// const nrf_drv_timer_t TIMER_TIMEOUT = NRF_DRV_TIMER_INSTANCE(3);
APP_TIMER_DEF(m_repeated_timer_id);

#define TIMEOUT 31000
#define TX_TIMEOUT 20

uint32_t Timeout = 0;
uint32_t TX_Timeout = 0;
unsigned int IntervalTimer;
unsigned long int ShutoffTimer;
unsigned long int xTimer;
unsigned int KeyTimer = 0;
uint32_t MsTicker = 0;

bool PakektReady;

extern unsigned char SerBufferIn[MAX_SERIAL];
extern uint16_t ID ;

void InitIo(void);
void SetPower(bool OnOff);
void LedCheck(unsigned char PwmVal);

void WaitPaket(void) {

  TX_Timeout = 0;

  return;

  while (1) {
    if (TX_Timeout > 20)
      break;
    if (PakektReady == true)
      break;
  }
}

/**@brief NUS UUID. */
static ble_uuid_t const m_nus_uuid =
    {
        .uuid = BLE_UUID_NUS_SERVICE,
        .type = NUS_SERVICE_UUID_TYPE};

/**@brief Function for handling asserts in the SoftDevice.
 *
 * @details This function is called in case of an assert in the SoftDevice.
 *
 * @warning This handler is only an example and is not meant for the final product. You need to analyze
 *          how your product is supposed to react in case of 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 Nordic UART Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nus_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function to start scanning. */
static void scan_start(void) {
  ret_code_t ret;

  ret = nrf_ble_scan_start(&m_scan);
  APP_ERROR_CHECK(ret);

  ret = bsp_indication_set(BSP_INDICATE_SCANNING);
  APP_ERROR_CHECK(ret);
}

/**@brief Function for handling Scanning Module events.
 */
static void scan_evt_handler(scan_evt_t const *p_scan_evt) {
  ret_code_t err_code;

  switch (p_scan_evt->scan_evt_id) {
  case NRF_BLE_SCAN_EVT_CONNECTING_ERROR: {
    err_code = p_scan_evt->params.connecting_err.err_code;
    APP_ERROR_CHECK(err_code);
  } break;

  case NRF_BLE_SCAN_EVT_CONNECTED: {
    ble_gap_evt_connected_t const *p_connected =
        p_scan_evt->params.connected.p_connected;
    // Scan is automatically stopped by the connection.
    NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x",
        p_connected->peer_addr.addr[0],
        p_connected->peer_addr.addr[1],
        p_connected->peer_addr.addr[2],
        p_connected->peer_addr.addr[3],
        p_connected->peer_addr.addr[4],
        p_connected->peer_addr.addr[5]);

  } break;

  case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT: {
    NRF_LOG_INFO("Scan timed out.");
    scan_start();
  } break;

  default:
    break;
  }
}

/**@brief Function for initializing the scanning and setting the filters.
 */
static void scan_init(void) {
  ret_code_t err_code;
  nrf_ble_scan_init_t init_scan;

  memset(&init_scan, 0, sizeof(init_scan));

  init_scan.connect_if_match = true;
  init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;

  err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_nus_uuid);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_UUID_FILTER, false);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling database discovery events.
 *
 * @details This function is a callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function forwards the events
 *          to their respective services.
 *
 * @param[in] p_event  Pointer to the database discovery event.
 */
static void db_disc_handler(ble_db_discovery_evt_t *p_evt) {
  ble_nus_c_on_db_disc_evt(&m_ble_nus_c, p_evt);
}

/**@brief Function for handling characters received by the Nordic UART Service (NUS).
 *
 * @details This function takes a list of characters of length data_len and prints the characters out on UART.
 *          If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
 */
static void ble_nus_chars_received_uart_print(uint8_t *p_data, uint16_t data_len) {
  ret_code_t ret_val;

  static uint16_t index = 0 ;
  uint8_t data ;


  NRF_LOG_INFO("Receiving data.");
  NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
  

 for (uint32_t i = 0; i < data_len; i++) 
 {
 
      data = p_data[i];

 if (data == ':') // Paket Start
      {
        index = 0;
      }

      if (data == 10) // LF
      {
        SerialParser(index, &SerBufferIn[0]);
        index = 0;
        FlushInBuffer();
      }
      SerBufferIn[index++] = (char)data;

      if (index >= MAX_SERIAL)
        index = 0;

}


}

/**@brief   Function for handling app_uart events.
 *
 * @details This function receives a single character from the app_uart module and appends it to
 *          a string. The string is sent over BLE when the last character received is a
 *          'new line' '\n' (hex 0x0A) or if the string reaches the maximum data length.
 */
void uart_event_handle(app_uart_evt_t *p_event) {
  static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  static uint16_t index = 0;
  uint32_t ret_val;

  switch (p_event->evt_type) {
  /**@snippet [Handling data from UART] */
  case APP_UART_DATA_READY:
    UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    index++;

    if ((data_array[index - 1] == '\n') ||
        (data_array[index - 1] == '\r') ||
        (index >= (m_ble_nus_max_data_len))) {
      NRF_LOG_DEBUG("Ready to send data over BLE NUS");
      NRF_LOG_HEXDUMP_DEBUG(data_array, index);

      do {
        ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
        if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES)) {
          APP_ERROR_CHECK(ret_val);
        }
      } while (ret_val == NRF_ERROR_RESOURCES);

      index = 0;
    }
    break;

  /**@snippet [Handling data from UART] */
  case APP_UART_COMMUNICATION_ERROR:
    NRF_LOG_ERROR("Communication error occurred while handling UART.");
    APP_ERROR_HANDLER(p_event->data.error_communication);
    break;

  case APP_UART_FIFO_ERROR:
    NRF_LOG_ERROR("Error occurred in FIFO module used by UART.");
    APP_ERROR_HANDLER(p_event->data.error_code);
    break;

  default:
    break;
  }
}

void SendRfPacket(char *data_array, unsigned int index) {

  uint32_t ret_val;

  static uint8_t Chunks;
  static uint8_t Chunk[21];
  static uint16_t i, j;

  #ifdef NO_BLE
  return ;
  #endif

  NRF_LOG_INFO("Ready to send data over BLE NUS");
  NRF_LOG_HEXDUMP_DEBUG(data_array, index);
/*
  if (data_array[index] == POWER_DOWN) {
    power_down = true;
    return;

  } else if (data_array[index] == BT_COMMAND_SET_PEER_ADDR) {
    save_peer_addr = true;
    return;

  } else if (data_array[index] == BT_COMMAND_CLEAR_PEER_ADDR) {
    clear_peer_addr = true;
    return;
  }
*/
  if (index >= m_ble_nus_max_data_len) 
  {

    Chunks = index / 20;
    for (j = 0; j < Chunks; j++) 
    {
      for (i = 0; i < 20; i++)
        Chunk[i] = data_array[i + j * 20];

      TX_Timeout = 0;
      PakektReady = false;
       NRF_LOG_INFO("Send Data Chunk");
      do
      {
        ret_val = ble_nus_c_string_send(&m_ble_nus_c, Chunk, 20);
        if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES)) 
        {
          APP_ERROR_CHECK(ret_val);
        }
        if (TX_Timeout > TX_TIMEOUT)
          break;
      } while (ret_val == NRF_ERROR_RESOURCES);
    }

    if ((index % 20) > 0) 
    {

      for (i = 0; i < (index % 20); i++)
        Chunk[i] = data_array[i + (index / 20) * 20];

      TX_Timeout = 0;
       NRF_LOG_INFO("Send Data Rest");
      do 
      {
        ret_val = ble_nus_c_string_send(&m_ble_nus_c, Chunk, (index % 20));
        if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES)) 
        {
          APP_ERROR_CHECK(ret_val);
        }
        if (TX_Timeout > TX_TIMEOUT)
          break;
      } while (ret_val == NRF_ERROR_RESOURCES);
    }
  }
   else
    {
 NRF_LOG_INFO("Send Data ");
    do {
      ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
      if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES))
      {
        APP_ERROR_CHECK(ret_val);
      }
    } while (ret_val == NRF_ERROR_RESOURCES);
  }
}

/**@brief Callback handling Nordic UART Service (NUS) client events.
 *
 * @details This function is called to notify the application of NUS client events.
 *
 * @param[in]   p_ble_nus_c   NUS client handle. This identifies the NUS client.
 * @param[in]   p_ble_nus_evt Pointer to the NUS client event.
 */

/**@snippet [Handling events from the ble_nus_c module] */
static void ble_nus_c_evt_handler(ble_nus_c_t *p_ble_nus_c, ble_nus_c_evt_t const *p_ble_nus_evt) {
  ret_code_t err_code;

  switch (p_ble_nus_evt->evt_type) {
  case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
    NRF_LOG_INFO("Discovery complete.");
    err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
    APP_ERROR_CHECK(err_code);

    err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
    APP_ERROR_CHECK(err_code);
    NRF_LOG_INFO("Connected to device with Nordic UART Service.");
    break;

  case BLE_NUS_C_EVT_NUS_TX_EVT:
    ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
    break;

  case BLE_NUS_C_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected.");
    scan_start();
    break;
  }
}
/**@snippet [Handling events from the ble_nus_c module] */

/**
 * @brief Function for handling 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_GATTS_EVT_HVN_TX_COMPLETE:

    PakektReady = true;
    break;

  case BLE_GAP_EVT_CONNECTED:
    err_code = ble_nus_c_handles_assign(&m_ble_nus_c, p_ble_evt->evt.gap_evt.conn_handle, NULL);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);

    // start discovery of services. The NUS Client waits for a discovery result
    err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:

    NRF_LOG_INFO("Disconnected. conn_handle: 0x%x, reason: 0x%x",
        p_gap_evt->conn_handle,
        p_gap_evt->params.disconnected.reason);
    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_SEC_PARAMS_REQUEST:
    // Pairing not supported.
    err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    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;

  default:
    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 a handler for BLE events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}

/**@brief Function for handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {
  if (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED) {
    NRF_LOG_INFO("ATT MTU exchange completed.");

    m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Ble NUS max data length set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  }
}

/**@brief Function for initializing the GATT library. */
void gatt_init(void) {
  ret_code_t err_code;

  err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_gatt_att_mtu_central_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
}

/**@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_ble_nus_c.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_ERROR_INVALID_STATE) {
      APP_ERROR_CHECK(err_code);
    }
    break;

  default:
    break;
  }
}

/**@brief Function for initializing the UART. */
static void uart_init(void) {
  ret_code_t err_code;

  app_uart_comm_params_t const comm_params =
      {
          .rx_pin_no = RX_PIN_NUMBER,
          .tx_pin_no = TX_PIN_NUMBER,
          .rts_pin_no = RTS_PIN_NUMBER,
          .cts_pin_no = CTS_PIN_NUMBER,
          .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
          .use_parity = false,
          .baud_rate = UART_BAUDRATE_BAUDRATE_Baud115200};

  APP_UART_FIFO_INIT(&comm_params,
      UART_RX_BUF_SIZE,
      UART_TX_BUF_SIZE,
      uart_event_handle,
      APP_IRQ_PRIORITY_LOWEST,
      err_code);

  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the Nordic UART Service (NUS) client. */
static void nus_c_init(void) {
  ret_code_t err_code;
  ble_nus_c_init_t init;

  init.evt_handler = ble_nus_c_evt_handler;
  init.error_handler = nus_error_handler;
  init.p_gatt_queue = &m_ble_gatt_queue;

  err_code = ble_nus_c_init(&m_ble_nus_c, &init);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing buttons and leds. */
static void buttons_leds_init(void) {
  ret_code_t err_code;
  bsp_event_t startup_event;

  err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);
}

/**@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 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 power management.
 */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/** @brief Function for initializing the database discovery module. */
static void db_discovery_init(void) {
  ble_db_discovery_init_t db_init;

  memset(&db_init, 0, sizeof(ble_db_discovery_init_t));

  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 Function for handling the idle state (main loop).
 *
 * @details Handles any pending log operations, then sleeps until the next event occurs.
 */
static void idle_state_handle(void) {
  if (NRF_LOG_PROCESS() == false) {
    nrf_pwr_mgmt_run();
  }
}

void SysTick_Handler(void) {

  static uint16_t msTicks = 0;

  ShutoffTimer++;
  KeyTimer++;
  IntervalTimer++;
  xTimer++;
  MsTicker++;
}

int main(void) {
  // Initialize.

 
  log_init();

  nrf_delay_ms(501);

   ID = GetSerialNumber();

  timer_init();
 
  uart_init();
  buttons_leds_init();

#ifndef NO_BLE
  db_discovery_init();
  power_management_init();
  ble_stack_init();
  gatt_init();
  nus_c_init();
  scan_init();
  scan_start();
#endif

  SysTick_Config(SystemCoreClock / 1000);

  InitIo();

  SetPower(0);
  SetPower(1);

  LedCheck(1);

  // Enter main loop.
  for (;;) {

    // Statemachine();

   
     // idle_state_handle();
  }
}