Arduino MEGA ADK: read data from usb(not serial)


I'm new on this field and I've spent my last 3 days searching for a way to read some data from a usb device( It sends packets of 12 octest and all I want to do is to read 2 of them. I want to be able to set the transfer speed and the data buffer . . . I guess.

This board has a integrated usb device PORT. I've read about USB shield 2 Library but I've seen it helps connectiong with a Android phone. I'm sure it's a simple solution but I'm not able to find it.

Do you have some advices where should I find something?