I have a custom board with an STM32U535RET6. This chip receives data from another processor using UART4 on pins PA0 and PA1. Once the data is received, it should be sent to another chip using USART3 on pins PC4 and PC5.
If I transmit a fixed string directly, it works correctly. However, if I try to transmit the data received from UART4 (which is a message of about 70 bytes ending with "X"), it does not work.
Additionally, HAL_UART_RxCpltCallback seems to freeze. I added a log inside the callback and I can see it print, but after a few executions, it stops running and no more bytes are received.
I hope someone can help me, I can send more files if needed
