[Nucleo-N657X0-Q ]How to use swv printf in Keil arm mdk 5.39

[bioak]

I would like to use SWV for debugging on the Nucleo-N657X0-Q board.

I first enabled SWV debugging and also change the CPU clock to 400 MHz.

Then, I added some code to main.c (as reference here ).

At the same time, I also set the core clock to 50 MHz in the TRACE configuration of Keil.

But i can't see any string in Debug Viewer.

Does anyone know what else I should check?

Thank's 

[KDJEM.1 · Accepted solution]

Hello @bioak and welcome to the community;

Have you encountered the same issue while using the STM32CubeIDE toolchain? 

I recommend you to look at this post and get inspired to check the settings:

I hope this help you.

Thank you.

Kaouthar

[bioak]

Hi KDJEM,

I made a silly mistake.
At first, I used CubeIDE, but I couldn’t see any messages in the Trace View window.
So I switched to Keil MDK to verify the output.
Now I can see the messages.
The reason I couldn’t see the printf messages in CubeIDE was that I hadn’t enabled Start Trace.

Thank you for your reply. I really appreciate it.