RTT not appearing in modified ble_app_uart example

[jake11212]

    Hello,

I have been developing software on the ble_app_uart example in Segger Embedded Studio with sdk 17.0.2.  The example has RTT enabled but I noticed when I try to use RTT in my modified version that no RTT shows up in the debugging window.  I added various libraries and changed the config file, but did not remove anything or turn off anything in the config file from the example.  I wasn't sure how to troubleshoot this and was wondering what potential problems might be interfering with RTT outputs in the debugging terminal.  Here is my main() code, I can add more if necessary.  

int main(void)
{
    bool erase_bonds;
    ret_code_t rc;

    // Initialize.
    twi_init();
    uart_init();
    log_init();
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();


    /* Register first to receive an event when initialization is complete. */
    (void) fds_register(fds_evt_handler);


    rc = fds_init();
    APP_ERROR_CHECK(rc);

    /* Wait for fds to initialize. */
    wait_for_fds_ready();

    // Start execution.
    printf("\r\nUART started.\r\n");



    //turn on LED3 while on and not in sleep mode
    nrf_gpio_cfg_output(LED2);
    nrf_gpio_pin_clear(LED2);

    NRF_LOG_INFO("Debug logging for UART over RTT started.");



    //button press waits for a button press event or times out and goes to sleep mode if no button press is received in 15 seconds
   
    
    buttonPress(); 

    nrf_delay_ms(100);

    advertising_start(); 

    //advertise for 15 seconds then try to send the data
    nrf_delay_ms(5000);

    //SendTime sends the entire memory, should add a condition to make sure that it's connected to BLE, potentially only send new entries etc.
    SendTime(); 

    //wait 5 seconds after sending the data before entering sleep mode, just here to give time to read in devtools for debugging
    nrf_delay_ms(5000);

    sleep_mode_enter_wakeup_enabled();
    
   


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

[Simonr]

Hi

Yes, the UART backend for logging is disabled by setting the NRF_LOG_BACKEND_UART_ENABLED to 0 in sdk_config.h. My mistake, this define is not used in the ble_app_uart example, as the UART backend is not used for logging, but for the application and NUS service instead.

What I did notice though, is that there are some CLI defines (amongst other things) disabled in the ble_app_uart example's config file. Have you remembered to enable these to go with the additional peripherals you're using?

The description of NRF_LOG_BACKEND_UART_ENABLED is wrong in the Infocenter it seems. I have reported this to our tech. doc. writers. Thank you for pointing that out!

Best regards,

Simon

[jake11212]

Simonr said:

What I did notice though, is that there are some CLI defines (amongst other things) disabled in the ble_app_uart example's config file. Have you remembered to enable these to go with the additional peripherals you're using?

Which defines need to be enabled and what effects would CLI have on RTT?  I don't think I understand the interaction and there are a lot of CLI defines so I'm not sure what changes I need to make or should try.