Sorry if this is a rookie question. I have set up USART 2 to receive a UART command. If the sent command is "<EN>", I need to toggle the value of a global state variable. When transmitting the received data via the callback interrupt, I have no issue...

Trying to configure my project to use USART2. When I opened "System Core" and "Connectivity", I see that a bunch of options are disabled or have warning signs. I haven't been able to find out why or how to change them, and this isn't an issue I have ...