USB Graphic Tablets

[Julian H. Stacey]

Chuck Robey wrote:
> >>>> Well, my first question is, does there exist a tool for USB that let's you
> >>>> view the raw return from the usb probing?  I want to see what this device
> >>>> is actually identifying itself as.  Actual numeric vendor IDs and product
> >>>> IDs are the sort of thing I'm after.  Something a whole lot more detailed
> >>>> that usbdevs, please.  Even the dmesg listing (as I show above) hasn't got
> >>>> the numbers and tails I need.
> >>> Hi Chuck,
> >>> On list    sane-devel at lists.alioth.debian.org (A mostly Linux using
> >>> crownd though not just, some BSD) They mostly seem to rec. some
> >>> (free I assume) MS$ comparible .exe prog for snatching USB traffic
> >>> to then analyse / develop for *IX drivers. I don't remember prog name,
> >>> but http://lists.alioth.debian.org/mailman/listinfo/sane-devel
> >>> Julian
> >> Thanks much for the URL, I will definitely look it up.  I'm a bit surprised
> >> that the SANE folks, who I took to be scanner-oriented, should be
> >> interested in graphic tablets.
> > 
> > Err, they're not far as I know, but they often seem to want to grab
> > byte streams on scanners to then analyse for Sane.  I guess what
> > one wants to later use the grabbed traffic for doesnt matter, so
> > long as one has the traffic grabbed for analysis ?
> 
> Well ... OK,  I'm having just a bit of a hard time seeing how that would
> help me in trying to get my graphic tablet working on FreeBSD for my dear
> old gimp,

Ah, sorry, forgot to say: Using a 2nd PC as traffic monitor.

You'd issue probe from FreeBSD to USB device using whatever tools,
& the (Gasp! Wash my mouth out with soap!) - MS.EXE prog running
on a 2nd PC would trap a copy of traffic in each direction,
synchronising the 2 as well I believe though never tried it.  The
2nd monitoring (MS) PC uses 2 USB ports, one to copy FreeSBD PC to
tablet device traffic, & the other port to copy tablet to FreeBSD
traffic.  ... & you have to make up a special USB cable, eg a male
to female USB extender cable, with tapped copies of signal in each
direction going to 2 extra USB connectors to 2 ports on 2nd monitor
PC.  Sane developers seem to do that a lot on new unknown USB
scanners.


> but I know darn well  you're right more often than I am, so I
> will give a good look at that list anyhow.

Non tech flippancy:
  Chuckle, dreadful thought to be wise! .. BBC's Hitchkikers Guide
  To The Galaxy: To leader of bird people: "What do we call you ?"
  "Well, some call me the wise .. old ..  bird" ponderously said
  by John Le Mesurier (Sergeant Wilson in BBC's 'Dad's Army') :-)
-- 
Julian Stacey.  BSD Unix Linux Net Consultant, Munich.  http://berklix.com