[sane-devel] Fwd: Re: Canon LiDE 120 scanner support

[Stef]

Resending since "moderated because of too many recipients".

-------- Forwarded Message --------
Subject: 	Re: Canon LiDE 120 scanner support
Date: 	Tue, 24 Feb 2015 21:22:51 +0100
From: 	Stef <stef.dev at free.fr>
To: 	brian.bloniarz at gmail.com
CC: 	sbaugh at catern.com, hginsberg at worcester.edu, willismonroe at gmail.com, 
webmail4 at hblok.net, Martin Heitmann <heitmann at strategie.tu-berlin.de>, 
sane Development <sane-devel at lists.alioth.debian.org>



On 24/02/2015 19:56, brian.bloniarz at gmail.com wrote:
> Hi Mr. Voltz,
>
> I read on sane-devel that the LiDE 120 scanner has a new chip from Genesys and might
> require a little reverse-engineering to make work.
>
> Since you know the backend well, I was wondering if you'd be willing to look at it?
> I'm wondering if I can help by donating the scanner or some development funds.
>
> I've CC:d the other people who had asked on-list about LiDE120 support in case there's
> any interest. (I had a brief look on my own -- I copy-pasted the LiDE 110 Genesys_Model
> with the VID/PID from the 120. That makes the LED light up and stepper motor move, but
> not in the right direction -- I'm sure it won't be that simple!).
>
> Thanks and kind regards,
> Brian Bloniarz
     Hello,

     I have setup a small project on github
(https://github.com/stefdev49/syseneg) where you can find my current
work on analyzing the LiDE 220 protocol.
     Since I am working from recorded USB logs, only the hardware modes
used by driver will be known. So the final backend will not be as
complete as the genesys backend. For instance scan below 300 dpi are
always done at 300 dpi for LiDE 110 and 210, if the 220 does the same,
it will be highly unlikely I can have lower resolutions work since we
don't have the datasheet. The same goes for hardware lineart.
     At the end we can expect a backend that works correctly by
mimicking what can be found in USB logs. That will at least take me a
couple of months.
     We can expect to make the LiDE 120 work once the LiDE 220 works, if
they are as close as the LiDE 110 and 210 were (differing only by the
highest sensor resolution).

Regards,
     Stef



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