k_sleep() and printk() are not working on nrf54L15 dk

[Archiet]

Hi there,

I am following  nRF Connect SDK Fundamentals and it looks like that both k_sleep() and printk() are not working.

GPIO is working but I am not sure why these two functions do not work.

Regarding printk(), I can see that CONFIG_SERIAL/CONFIG_CONSOL/CONFIG_UART_CONSO are all equal to y. So I assume nothing is needed to configurate.

Regarding k_sleep(), i have no idea what to be checked.

Could you give some hints to me so I could be able to make them work?

Thanks a lot!

[Kenneth]

Hello,

If you for instance use the solution:
https://github.com/NordicDeveloperAcademy/bt-fund/blob/main/v2.8.x-v2.7.0/l2/l2_e1_sol/src/main.c 

Does it not work as expected? Maybe you are forgetting the K_MSEC() macro inside k_sleep()?

Kenneth

[Archiet]

Hi there!

I have used the same files which I attached to previous reply on nrf52840 DK, both k_sleep()/k_msleep() and printk() are working.

Besides, I have used Bluetooth LE LBS example on both DKs, nrf52840 DK can work but nrf54L15 DK.

Both DKs are using 2.8 SDK and VS code for development. Since everything is the same except hardware, may I now whether there is further configuration on top of the examples' setting? Or what should I do to bring nrf54L15 DK to work just like what nrf52840 behaves?

Thanks!

[Kenneth]

Hi,

Maybe it's something wrong with your DK, but if you open the \zephyr\samples\hello_world example, and replace main.c with

#include <stdio.h>
#include <zephyr/kernel.h>

static uint32_t counter;

int main(void)
{
	printf("Hello World! %s\n", CONFIG_BOARD_TARGET);

	while(1)
	{
		k_msleep(1000);
		counter++;
		printf("Hello World! %s %d\n", CONFIG_BOARD_TARGET, counter);
		if(counter==10)
			return 0;
	}

	return 0;
}

Don't you get simply something like this, with 1second delay between lines:

Kenneth

[Archiet]

Hi there! 

I am not able to see the the 1s delay or printf message. However, I can use buttons to trigger on/off of LEDs, both polling and interrupt work.

[Archiet]

Hi there! I think I can only see the first printf which is located outside while loop from serial port. Those inside the while loop are missing.

[Kenneth]

Do you have a second nRF54L15 that you can try? Or possible order a second one? If that one work, I can replace the one that is not working.

Kenneth

[Archiet]

Hi there, 

Sorry to say I only have one so it could be challenging to have a 2nd one.

On the other hand, do you think you could share a verified .hex file with me so I can upload to my board to see if it works or not? I have a Jlink  so it is possible to do it either with an external debugger or with the on board Jlink debugger. If you agree ,may I ask you to share the  steps on how to upload .hex file to the board? Thanks!