H753ZI USART2 debugging

[TVan .8]

Hi,

I want to debug the H753ZI through USART2 and connect to the PC through USB. I've done this a lot with other NUCLEO boards. Apparently this feature is not present on the H753ZI board?

Is there another UART connected to the ST-link on this board? Or is there no opportunity to send UART through USB?

Thanks in advance,

Best regards

Tom

[Karl Yamashita]

Why don't you use the default VCP on UART3 to debug? Or do you specifically need to use UART2?

[Tesla DeLorean]

This is the H753ZI2 board with the ST-LINK/V3 right? As I recall it uses a different UART than the ST-LINK/V2 model. Check User Manual and Schematic in CAD Resources tab.

Will check when I'm in front of a computer. 

[TVan .8]

Thanks for the replies, I've enabled all of the UART's and I'm continuously sending 1 character on all of them. But I get nothing through the COM port?

[Tesla DeLorean · Accepted solution]

USART3 PD8/PD9 to the ST-LINK/V3 VCP

Make sure HSE_VALUE correctly reflects the speed of the external clock, or use HSI (64 MHz)

Get a scope check the signal, show code if you want us to understand what you've done..

[TDK]

The other folks have it covered, but there's no reason to guess at which UART/pins to use. The user manual has all this information:

https://www.st.com/resource/en/user_manual/um2407-stm32h7-nucleo144-boards-mb1364-stmicroelectronics.pdf

[TVan .8]

Thx, Ill check it out later

[TVan .8]

Thx, this worked