Help Needed: UART3 Configuration on NUCLEO-H7A3ZI-Q Board

[Shreayas_Acharaya]

Hi,
I’m trying to set up UART communication using UART3 on the NUCLEO-H7A3ZI-Q board. I have the UART3 pins (PD8 and PD9) connected to the ST-Link VCP on this board.

Do I need an external USB-UART converter to communicate through other UART pins, or should the onboard ST-Link handle the UART3 communication through VCP?
It's showing USART3 is not available.

I’m new to this board, so I want to confirm if there’s anything I might be missing in the configuration or connections. Any guidance would be appreciated!

Thanksin advance!

[SofLit]

Hello,

If you want to use USART with PD8/PD9 with STLINK virtual comport no need to use external USB/UART bridge.

But if you need to change to other IOs using an external USB/UART bridge is a must.

But there is a workaround: you can use USART3 with other IOs and using STLINK-VCP by wiring the Tx connected to the VCP to the new Tx. Same for Rx.

Attached an ioc file where USART3 is enabled on NUCLEO-H7A3ZI-Q board.