I am developing a product using STM32F407ZGT. During multi-communication with other products, it was found that RS-485 communication was not available under 7BIT and ODD conditions. I am asking for help to solve it.

[KKim.41]

Please check whether 7BIT communication is not supported for STM32F407ZGT product.

[TDK]

The STM32F4 support 8 or 9 bits for UART, including the parity bit.

7 data bits + 1 parity bit (odd) is supported.

7 data bits with no parity is not supported.