RTT loging

[sefel08]

Hi, I got my nrf54L15 DK, but i can't start RTT logging. I set this configs:

CONFIG_PRINTK=y

CONFIG_CONSOLE=y

CONFIG_RTT_CONSOLE=y

CONFIG_UART_CONSOLE=n

CONFIG_USE_SEGGER_RTT=y

CONFIG_LOG=y

CONFIG_LOG_DEFAULT_LEVEL=3

CONFIG_LOG_BACKEND_RTT=y

And this is my main:

#include <zephyr/kernel.h>

#include <zephyr/logging/log.h>

LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);

int main(void)

{

        LOG_INF("Hello World!\n");

}

I can flash my board, but when i opens RTT console (set to automaticly search for memory region and set nrf54L15 M33Cortex as device) and reset my board I can't see my mesage.
Any guidance is greatly appreciated.
Best regards, Sebastian.

[nordicator_prim3]

It seems like all your config is there so it should be working.

Try doing that log message in a loop with a one second delay each loop. You would have to get lucky to connect via RTT fast enough after programming to see that first log message.

[nordicator_prim3]

I haven't messed with my 54l devkit yet so I just tried the below code with your config and was able to see the logging messages on the "Debug In / Trace" header on the DK. Make sure you aren't using "Debug Out".

#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>

LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);

int main(void)
{
        for (;;)
        {
                LOG_INF("Hello World! %s", CONFIG_BOARD);
                k_sleep(K_SECONDS(1));
        }
        return 0;
}

Also, I usually have to connect on RTT again after each programming. It didn't used to be that way but it is now on my system.

[sefel08]

Thanks for all advises. I figured it out.