I'm attempting to communicate with a piece of hardware via the ttyS0 serial port - using the Tobi Board 9/10 pins.  I'm attempting to interface with the hardware as a simple serial port connection.  So far I've had no luck being able read across this connection. 

Right now I'm keeping the software portion very simple just to see if I can get something working it's simply using the termios api to open the connection set the attributes and attempting to read from it.

Are there additional things that need to be done to enable this port?  Am I missing something in the hardware portion that's required for this to function properly.  Driver? 

Any information is appreciated?