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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Mon, 25 May 2009 13:44:45 +0200
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Cc: "Rodrigo OSORIO \(ros\)" <rodrigo@bebik.net>
Subject: Re: improve my USB knowledge
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On Monday 25 May 2009, Rodrigo OSORIO (ros) wrote:
> Hi fellow hackers,
>
> This weekend I try to increase my knowledge about USB devices - I start
> from 0 - playing with one of this funny low cost USB gadgets.
> I read few articles about writing USB drivers, specially the Linux USB
> development guide, and I want to know if there is others (BSD related)
> articles or documents I can/must read.  FYI, I work with the new USB stack
> in 8-CURRENT.
>

Hi,

Maybe a good starting point would be usbconfig utility and the do_request 
command, which allows you to control your gadget through the control 
endpoint.

Else there is the manpages:

man libusb
man usb

--HPS