Posted on February 16, 2017 at 23:16I had assumed the RS232 levels were familiar to a prior user of micro-controllers. The VCP on the NUCLEO obviates that somewhat. On the STM32F4-DISCO the use of a STM32F4-DIS-BB breakout board provide RS232 connectivity via USART6 PC6 and PC7.
Not sure if a specific target board has been chosen/used here. With more details better examples might be available.
The RXNE and TXE type status bits would be similar to other micros. Character reception can be stored into strings, and compared or parsed. C provides things like strcmp(), sscanf(), etc
For learning C a review of K&R would be a going starting point, although the implementation of getch() and scanf() might be more involved in embedded systems where board/chip specific support must be addressed.
