Re: USB I/O

["Rupert Pigott" <darkboo-remove-this-ng.@hotmail.com>]

"Marin David Condic" <mcondic.auntie.spam@acm.org> wrote in message
news:apjbi9$hk0$1@slb7.atl.mindspring.net...
> I have not done this yet. (Day ain't over, yet!) However, I'd suggest
this:
> Whatever is happening at either end of the USB port, you've *probably* got
> some kind of OS calls to deal with it. Either it looks like a file (in
which

I use OpenBSD, which inherits NetBSD's USB API... www.netbsd.org. From
what I can gather having a brief skim of the man page you ticklet USB via
ioctls
on a /dev/usb... file.

[SNIP]

> If you don't have an OS and you're trying to write low level driver code,
> then your first stop is the hardware reference manual for the device
you're
> looking at. Somewhere between that and the hardware reference for the

I'd say the first place to look is at the USB specs at : www.usb.org. The
specs appear to be free for download at http://www.usb.org/developers/docs/

Even after all that you might well need to resort to extracting information
from
the manufacturer too. The first place I'd look would be at the 'open source'
drivers & applications that talk to USB, so any BSD UNIX or Linux site
would be a good starting place. I'm not sure which site I can recommend for
that kind of info for Linux, but www.netbsd.org, www.freebsd.org and
www.openbsd.org work for the BSD ones. :)

Cheers,
Rupert