I have an external board and I don't know what kind of micro controller uses and it has a usb cable in order to send data to the pc .So, I want to suggest me if you could a program which can receive data from a usb cable and appears the data to my screen.
I think Usb port comunicates in Master Slave fashon. So you cannot find a software for just monitoring the usb data. Only apporopate driver or software will be able to communicate with your board.