I want to say a big thank you for finally adding support for the RX_TIMEOUT event for STM32F4 MCU U(S)ART support.
You just saved me a lot of work writing my own U(S)ART lib.
Still missing CTS event, but that's quite minor in comparison.
Now I need to see what I need to do to be able to use CMSIS UART for my project. Not knowing how much data to expect at any time makes the default u(s)art support a little iffy, but maybe if I combine with circular DMA, I can achieve what I need to...