I have a NUCLEO-144 board and it has a factory-installed application that flashes the LEDs and uses push button 1 to change which LED is flashing.This is described in section 5.1 "Getting started" in UM1974 for the NUCLEO-144 boards.I have found some...

I want to interface to an existing RS-485 bus where the 9th bit (normally reserved for parity) is set to 1 for the first two packets of each frame (as an addressing mechanism) and then cleared to 0 for the subsequent "data" bytes.If I set PCE=0 in r...

Refer to https://www.st.com/resource/en/datasheet/stm32f446re.pdfIn section 3.23 on PDF page 32, it says:"The devices embed four universal synchronous/asynchronous receiver transmitters (USART1, USART2, USART3 and USART6) and four universal asynchron...