SWV ITM console not working on STM32F407 Discovery Board

[vakati]

Dear STMicroelectronics Support Team,

I am working on the STM32F407G-DISC1 (STM32F4 Discovery) board and I am unable to watch printf() statement in SWV ITM Console output in STM32CubeIDE.

To enable the SWO trace output, I referred to the user manual and identified that SB12 (SWO) was in OFF state by default. Following the recommendation, I removed the 0-ohm resistor between the SB12 pads on the backside of the board and directly shorted the pads using solder to connect the SWO signal to PB3.

I also attached an image of the soldered SB12 pads for your reference.

Here are the board details:

- **MCU Model**: STM32F407VGT6  

- **Board**: STM32F4 Discovery

Could you please advise if any additional configuration or hardware action is needed for the SWO functionality to work properly?

Request you to send me a reference video link for any modifications mentioned by you.

Thank you for your support.

Best regards,  

Vakati Hemanth ,

[Amel NASRI]

Hi @vakati ,

Please refer to the first section of the article: Using the ITM console for printf redirects and LWIP debug messages.

Another option: How to redirect the printf function to a UART for debug messages.

-Amel

[Tesla DeLorean]

Test ITM_SendChar by itself.

Clock and core settings must be consistent. ie what the MCU is running at and what you tell the PC side software