[sane-devel] Canon imageCLASS MF5770 does not work with sane

[Nicolas Martin]

Hmm, this MF5770 holds a CCD device, like the MP750, that's why it
requires a calibration sequence. 

Yes, a first step would be to try with the current MP750 backend file,
and see how it goes. 

Jerry:

Could you test the attached 2 files, simply replace the ones in your
current git tree, in subdir sane-backends/backend with those 2 new ones
in the archive, and recompile/reinstall
In this case, take a logtrace as you did previously, and send it back.

Also, as Dennis suggested, could you take a longer USB snoop to get the
whole scan sequence ?

Nicolas 



Le mercredi 13 mai 2009 à 18:16 -0700, Dennis Lou a écrit :
> --- On Wed, 5/13/09, Nicolas Martin <nicolas0martin at gmail.com> wrote:
> > Dunno if you still own your ImageClass device, but as you
> > were more
> > expert than me on this part of the pixma backend, I
> > naturally dare
> > proposing you, if you can, to have a quick look at what's
> > going on
> > here. 
> 
> Yup, still have it and I happened to catch the exchange on the mailing
> list archive when I was browsing it.  Bad timing too, as I had just
> cleaned out my old imageclass dev files and started a couple other
> hacking activities a few days ago :-)
> 
> Anyway, I took a quick peek at the provided log.  First of all, it's a
> bit too short.  A little longer log might be helpful.
> 
> Secondly, the protocol looks a lot more like the mp750 based on:
> - Calibration cmd (0xe920) is in the logs like mp730/mp750 but not
> iclass
> - cmd_read_image length (10) is same as mp730/mp750 and unlike iclass
> (11)
> - cmd_err_info (0xff20) is in mp750 and iclass but not mp730
> 
> Perhaps try taking the USB ID out of pixma_imageclass.c and put it in
> pixma_mp750.c?  I can keep digging into the log if you want and
> hopefully Jerry can supply a better one, but that's my initial
> impression.
> 
> -Dennis
> 
> P.S. I find it a bit curious that a laser-based MFP would need
> calibration.  Aren't these things supposed to be quick-start for when
> the user wants to use it as a copier machine?
> 
> 
>       
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