Dear sirs,
I'm trying to use STM32F469I-DISCO USART6 (PG9 as RxD and PG14 as TxD).
The transfer is succeed (I checked using a logic analyzer).
But when set the transfer data to the DR register, 0x7F is appeared the DR register and RXNE bit is set, without no receive data (even if no connection to PG9 port).
And after short time, the RXNE bit is cleared automatically (so the phenomenon of step execution and free run is difference).
I attach a sample source code. (Similar code works on STM32L452.)
Thank you for your support.
