Receiving UART Debugging Messages in Realtime in NRF SDK 17.0.2 on 52833

[jake11212]

    Hello,

I am currently using the Segger cp210x to receive UART messages from a custom board with the 52833.  I am using nrf_log_info with log level 3 and am able to receive the messages in putty, but they are only appearing if the app crashes/loses power.  I am using all the Nordic suggested putty settings (115200 baud rate, 8bit data, parity none, 1 bit stop bit, flow control none) but  It seems that there is a cache somewhere that is not clearing correctly, as I assume these messages should be received as they occur, but I am not sure what is causing this behavior.  What can I do to receive these messages as the program is running?

Thanks,

Jake

[jake11212]

Found the issue.  In sdk_config.h under the UART module there is the setting

#ifndef NRF_LOG_DEFERRED
#define NRF_LOG_DEFERRED 1
#endif

1 seems to be default behavior and will defer messages until processor enters sleep mode which explains the behavior I saw.  0 Changes the behavior to send messages immediately at the cost of clock cycles.