Re: [iPAQ] iPAQ and USB

From: Russ Nelson <rn-handhelds.a.t.crynwr.com>
Date: Sat Aug 19 2000 - 16:55:22 EDT

Ed Gould writes:
> > I wonder how hard it would be to invent a USB server which asked a USB
> > client for all of its commands? It would basically just encapsulate
> > everything, and send it to the client. Then the USB client (an iPAQ,
> > obviously) could master the USB.
>
> It's not that simple. USB does not define most of the protocol between master
> and slave; the clients, in general, do not have a "list services" command.

No, I mean a pure encapsulation, like IP-IP encapsulation. The
"master" would look for an iPAQ, and ask it for data. When the
"master" got the data, it would send it out as a command on the USB.
The return packet would go back to the iPAQ, encapsulated as a write
data packet.

You'd have double the traffic at all times, but it would enable
interesting products, like allowing an Ethernet USB client to command
the bus.

-- 
-russ nelson <sig.a.t.russnelson.com>  http://russnelson.com  | If you think 
Crynwr sells support for free software  | PGPok | health care is expensive now
521 Pleasant Valley Rd. | +1 315 268 1925 voice | now, wait until you see
Potsdam, NY 13676-3213  | +1 315 268 9201 FAX   | what it costs when it's free. 
Received on Sat Aug 19 13:51:22 2000

This archive was generated by hypermail 2.1.8 : Tue May 04 2004 - 09:43:40 EDT