On Thursday 22 July 2004 03:32 pm, Alan Stern wrote:
> On Thu, 22 Jul 2004, Kyle Harris wrote:
> > I have a USB Tracker. It's not very sophisticated (cheap$), but does show
> > frame data. I can send you a screen grab of the output (didn't buy the
> > export feature), if that would be helpful.  The sequence on Windows is:
> >
> > SE0
> > GetDescriptor
> >    SETUP
>
> The Setup packet had wLength = 64?  Just want to make sure...

That is correct.

> >    IN (8 bytes)
> >    OUT
> > SE0
> > SetAddress
> >    SETUP
> >    IN
> > GetDesciptor
> >    SETUP
> >    IN (8 bytes)
> >    IN (8 bytes)
> >    IN (2 bytes)
> >    OUT
> > several GetDescriptor frames follow
> >
> > > Is it always the same, or does it differ depending on
> > > the speed of the connection?
> >
> > How do I control the speed of the connection?
>
> _You_ don't control it, the device does.  Apparently the device you used
> for this test was low-speed; would Windows send the same initial packets
> if the device was full-speed or high-speed?

That's why I asked. I wasn't aware of anyway for me to control it. 

The device is full speed. I tried 2 other devices, both FS, and the sequence 
is similar (se0, get, se0, set, get, ...). I don't have any LS or HS devices. 
Just curious, why did you think the devide was LS?

Thanks, Kyle.



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