[sane-devel] Tevion MD90092 flat bed scanner, started to analyze

Stéphane VOLTZ stef.dev at free.fr
Tue Apr 3 05:37:41 UTC 2007

Le mardi 3 avril 2007, Jochen Lauber a écrit :
> Hello to everyone,
> I bought a TEVION MD90092 flatbed scanner at ALDI Sued two weeks ago. Since
> no support for Linux is included, I started to write a backend derived from
> the mustek_usb2.
> My Email with  information request to the www.MEDION.de support was
> automatically answered with a not helpfull FAQ list, and since then I wait
> for a further answer. (The hope dies at last).
> With the USBsniffer under Windows XP I found out, that there is a lot of
> data traffic to the scanner beforer the slider moves at all.
	There is usually quite a lot of activity before scanning. Things like 
verifying that scanning head is at home, doing a scan to locate geometric 
patterns 'under the roof' to compute physical scan area start, sensor 
calibration (offsets, gains and shading) are done before the effective scan.
	Also constant button polling may end up filling logs.

> NOTE: A newer DbgViewer.exe can be downloaded at microsoft , which supports
> also XP.
> However the USB trace with these tools is incomplete, data gets lost. -> so
> I will have to change the USBsniffer as well - OR -
> Who could send me a tool for complete USB traces?
	I have satisfying results with the usbsniff program. I have mirrored the 
latest version at http//stef.dev.free.fr/sane/outils/index.html  .
	There some awk/perl scripts that turn produced logs in more compact forms. 
They usually discard scanned data, which I think is a drawback. In case you 
want, I can send or post my own version of the 'parse1.awk' script which keep 
everything it can.


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