[sane-devel] Re: HP3300C analysis

volodya@mindspring.com volodya@mindspring.com
Sun, 22 Jul 2001 14:39:31 -0400 (EDT)

On Wed, 18 Jul 2001, Bertrik Sikken wrote:

> Hi people,
> I've been analysing my HP3300C scanner. I put the results up at
> http://home.zonnet.nl/bertrik/hp3300c/hp3300c.htm
> I analysed most of the parallel-over-USB transfer protocol (it's
> quite similar to some other USB scanners) and I know a little about
> how to control the scanner too, like turning the lamp on and off.
> Does anyone have any additional information or like to join forces?
> I'm having a little trouble with USB snoopy, because the
> bulk transfers seem to overflow the log causing some USB control
> packets to be missed at a couple of critical points.
> Has anyone ever built a version of USBsnoopy that does not log
> the contents of the USB bulk packets?

One thing I found useful is to specify very low dpi and very small windows
to be scanned - literally few pixels. This greatly improves quality of the
logs, though some data is still missed.

                               Vladimir Dergachev

> All the best,
> Bertrik Sikken
> --
> Source code, list archive, and docs: http://www.mostang.com/sane/
> To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com