How USB's are enumerated on the XO

[shivaprasad javali]

I was trying to use the port no to which the usb device is connected to
differentiate between two usb devices of the same type connected in my
application. For that I wanted the variant field between the two usb devices
so that I can uniquely identify them.

P.S: The output of lshal -m wasnt of much help for me.

Thanks
Shivaprasad


On Mon, Jun 23, 2008 at 7:47 PM, Tomeu Vizoso <tomeu at tomeuvizoso.net> wrote:

> 2008/6/23 shivaprasad javali <jbsp72 at gmail.com>:
> > Hi,
> >
> >       I have a usb device to be used with my application which does not
> have
> > any unique serial no. I noticed that when I connect two such devices to
> the
> > XO , In the /proc/bus/usb/devices file the Bus for the two remains the
> same
> > but the port no is different for the two. When I connect the same two
> > devices to a normal machine running fedora core 7, Its the Bus that
> changes
> > for the two and the port no remains the same.
> >
> >       The XO that I have is relatively old. So I wanted to know whether
> this
> > is what is expected on the XO or Is it different on the later versions of
> > the XO.
>
> I didn't quite understood what you are trying to do, but something
> that may help you is to plug and unplug the usb sticks while lshal -m
> is running. That may tell you something interesting.
>
> Good luck,
>
> Tomeu
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.laptop.org/pipermail/devel/attachments/20080623/c4ec4106/attachment.html>