Hey everyone, thanks for making this a great forum.
I have a Rabbit MiniCore RCM5750 on a Development Kit Interface Board (part#20-101-1236). Programs fine and everything works cool.
I would like to use the USB UART connected to serial port A (typically used for programming & debugging) as a diagnostic output for field service technicians while the board is in RUN mode (ie: JP1.Smode is NOT jumped). On the surface, it seems perfect: if a tech wants to know what’s going on with my firmware, connect a PC to the USB port of the Interface Board, crank up HyperTerm and configure it for COM6 (or whatever is shows up as), and check out whatever my firmware cares to tell, such as version numbers and error codes.
Unfortunately, opening serial port A and outputting characters does not seem to be getting out through the USB-UART.
Q1: Is this even possible with the hardware? Is the USB-UART even connected to serial port A when the interface board is jumped to RUN mode? Schematic looks cool for this, but maybe I’m missing something.
Q2: If I’m on a worthy path, is there more configuration that I must do besides opening port A at my desired baud rate and sending characters? I’ve programmed the other serial ports before (B, C, D, …) and find it exceptionally easy.
Thanks for taking the time to read and respond. I promise to do the same when I have something to add.