STM32G431KB Nucleo 32 - USART1 RX help

[LiamRDS]

I'm trying to use USART1 for Async however I cannot send data to the board. I'm using an FTDI USB-UART converter cable to test, the Nucleo is sending correct data my PC data no problem.

I can prove my code and terminal program on the PC works 2 way with the USART2 and VCP via STLINK.

When code is set to use USART1. USART1_Rx has nothing coming in.

I saw a reference in the UM for USART1:

"Only one USART is available and shared between ARDUINO® Nano and VCP. The selection is done by remapping (no need to change the hardware configuration)."

I think there might be something I don't understand about this. I have done the "remapping" with cube MX to assign the default UART1 pins PA9&10.

Any guidance is welcome on how to get Rx working.

[STTwo-32]

Hello @LiamRDS

I suggest you compare your UART configurations to the UART configuration in one of the provided examples. That will help you locating the issue. 

PS: It will be better if you share your code.

Best Regards.

STTwo-32

[Pavel A.]

Check the flow control pins on the FTDI side (CTS/DSR). Try other, simpler USB-UART converter (Prolific..).

[Karl Yamashita]

I have a Nucleo-G431KB and USART1 works on PA9 and PA10. Maybe put the FTDI in loopback to make sure it works? The only other thing to check if you have NVIC enabled?

[LiamRDS · Accepted solution]

It turned out that I was getting ORE after the first time my device send data to the STM32, it did work briefly however thereafter the Rx of course would not work.

I eventually just turned that off overrun CubeMX and it seems solid so far for this purpose.

Thanks for the help everyone.