STM32F303: other UART?

[msalat]

Fabulous project;

I want to attach my STM32F303 via an uart optocoupler (ch340c + everlight m611 [Vcc=3.3 not mentioned in the datasheet😕]) board,
but I don't want to modify my Nucleo board (solder bridges).

Could I use an other UART or is there an obvious reason against this?

https://github.com/parezj/EMBO/blob/main/src/firmware/src/...
./app/comm/comm.h:#define EM_UART                USART2               // UART periph
./app/comm/comm.h:#define EM_UART_RX_IRQHandler  USART2_IRQHandler    // UART IRQ handler
./cfg/cfg_f303re.h:#define EM_UART                USART2               // UART periph
./cfg/cfg_f303re.h:#define EM_UART_RX_IRQHandler  USART2_IRQHandler    // UART IRQ handler

Kind regards, Jochen

[msalat]

Could work, but other usart conflicts with USB/ADC/stlink etc.