nrf52 DK: UART problems

[H4NNE5]

Hello,

I integrated the relevant code from the "uart" example into the "ble_app_uart" example(this is all the code in the main routine):

uint8_t cr;        
uart_init();
	printf("\r\nUART Start!\r\n");

  while (true){
		        
    while (app_uart_get(&cr) != NRF_SUCCESS);
    while (app_uart_put(cr) != NRF_SUCCESS);

    if (cr == 'q' || cr == 'Q')
    {
        printf(" \r\nExit!\r\n");

        while (true)
        {
            // Do nothing.
        }
    }
}

Now have the problem that the program is stuck in this line:

while (app_uart_get(&cr) != NRF_SUCCESS);

The return value of the function is not "NRF_SUCCESS".

The echo function in the "uart" example was working fine.

The only difference between the uart_inits of both is uart_error_handle and uart_event_handle and the Flow Control. But even if I set this to enable it won't work:

UART:

BLE_APP_UART:

Also if I flash the code, I can't download the softdevice to the board. Maybe there are conflicts but I have no clue.

Thanks in advance Hannes

[H4NNE5]

The DK received the bytes from the script using the uart example but not in the ble-example.

Yes, the ble_app_uart example worked fine. Only after I got that running I started with this UART experiment.

Update: The Characters appear inside the "m_rx_fifo" struct so the RX is setup correctly and also after each received character the "err_code" is 0x00, but after leaving "app_uart_get" the program doesn't jump back into your routine but inside the routine "uart_event_handle" which is part of the "main.c" which is weird.

Btw. Thank you for your intensive help on this problem! That's highly appreciated.