Hi everyone. ı need 3 RX and 3 TX USART pins on STM32F103C6T8, I configured USART1 and USART2 but I can't see NVIC channel USART3_IRQN. I didnt understand and I dont know what to do. Any suggestions, Thanx

[Tomas SIRUCEK]

Hi,

there is no USART3. STM32F103C6T8 has only 2 USARTs (USART 1 and 2).

Have a nice day.

[Sözka.1]

is it possible to Implementing an emulated UART on STM32F103

[Tesla DeLorean]

You could implement a software UART, although it is a lot of effort and a drain on the limited horse power of the device.

Surely there are more appropriate STM32 family parts you could use over the 12+ year old design you've picked.