Solved
nucleo-f410RB uart problem
I have nucleo-f410rb on hand
i tried to connect all three uart pin on the board (uart 1,2,6)
none of them work
and i found if i use keil to code the board, the uart2 message could come out from arduino board uart pin
but if i used STM32CubeIDE , it can't even come out from arduino board uart pin
i searched for this problem.
some said it is the problem of the division of uart clock(since i can see the message when keil is used, i don't think it is related)
what is the problem?