For an STM32F427 / STM32F429 MCU is UART supported with 0.5 Stop Bit and DMA enabled configuration???

[AN.16]

I am using an STM32F429FI Nucleo board, and not able to communicate over UART with the confiiguration having 0.5 Stop bits and DMA being enabled.

Is this a valid configuration? Data sheet suggests use of 0.5 Stop bits with SmartCard mode does it mean it is not supported for regular mode of UART communication

[S.Ma]

DMA gets request from peripheral to read/write data bytes. The stop bits are not involved.

Beware smartcard needs USART and not UART. Find a working example to look at the HW registers setting in debug mode and compare.

[Tesla DeLorean]

General rule is that if it works in polled mode it can also be done with DMA.

Doesn't work how? Can out output a pattern, and does it look correct on scope or analyzer? If not show or describe how it is wrong..​