printnk doesn't work with RTT

[uzer123]

I'm trying to use printk for debugging with a) NRF5340 DK and a) NRF5340 AUDIO DK

With prj.conf (info from here):

CONFIG_LOG=y
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y
CONFIG_SERIAL=y

main.c

#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>

void main(void)
{
	while(1) {
		printk("hello\n\r");
		k_msleep(1000);
	}
}

I can display with VCOM1 in NRF5340 DK, but not with RTT in both NRF5340 DK and NRF5340 AUDIO DK (AUDIO DK doesn't show any VCOM).

Next i tried this configuration (same main.c) in prj.conf:

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n

And with RTT i can see the printk message only with NRF5340 DK, but not with NRF5340 AUDIO DK.

So, why printk cannot be seen with RTT in NRF5340 AUDIO DK?

[Turbo J]

CONFIG_PRINTK=y

[uzer123]

unfortunately it doesn't work (it's default to y for both DKs anyways)

[uzer123]

OK, i found the solution:

CONFIG_CONSOLE=y

must be added in prj.conf. 

This is already enabled in NRF5340 DK in zephyr\boards\arm\nrf5340dk_nrf5340\nrf5340dk_nrf5340_cpuapp_ns_defconfig file but

it is not included in NRF5340 AUDIO DK.