[sane-devel] New scanner Canon MF4770N Multi function

[Rolf Bensch]

Hi Ralph,

Many thanks for your help adding a new scanner to SANE.

It seems that you're using the sources from the stable version. Please
use the daily git snapshot from here:
http://www.sane-project.org/snapshots/ or use git as described here:
http://www.sane-project.org/README.linux. I already fixed the '0x10
paper in ADF' issue before. Maybe the underrun issue has also been fixed
before.

Please check SANE version with 'scanimage -V'. This should report:
scanimage (sane-backends) 1.0.24git; backend version 1.0.24.

For debugging you can activate debug messages on the console with
'export SANE_DEBUG_PIXMA=4'. If you want to see the USB protocols use
'export SANE_DEBUG_PIXMA=11' or 'export SANE_DEBUG_PIXMA=21'. Then start
xsane or scanimage from the console.

Please read the pixma manpage (man sane-pixma) for more infos.

You can send your patch file to the ml or direct to my email address.
Then I can commit it to git.

Cheers,
Rolf



Am 19.09.2013 08:10, schrieb littlesincanada:
> Hi,
> OK further to this I have managed to get the ADF working.
> Can someone who knows about Canon pixma printers give me a little
> assistance?
>
> Firstly, the ADF:
> In pixma_imageclass.c
>
> I had to modify the has_paper() function to:
>
> static int
> has_paper (pixma_t * s)
> {
>   iclass_t *mf = (iclass_t *) s->subdriver;
>   return ((mf->current_status[1] == 0) ||
>          ((mf->current_status[1] == 0x10) && (s->cfg->pid ==
> MF4770_PID)));
> }
>
> The paper in the status byte alternates between 0x10 for "Paper in
> ADF" and 0x01 for (No paper in ADF). This is quite a bit different to
> the other printers which are looking for 0 when there is paper. Anyone
> know why this might be?
>
> Secondly, there seems to be a mismatch in the expected image size and
> that received:
>
> [pixma] WARNING:image size mismatches
> [pixma]     1683840 expected (877 lines) but 1614720 received (841 lines)
> [pixma] pixma_read_image(): completed (underrun detected)
>
> I'm also getting some of these:
>
> [pixma] *sane_read***** Warning: padding may cause incomplete scan
> results
>
> I'm guessing there is a geometry calculation problem somewhere.
>
> The scan received looks fine so it is obviously overcoming whatever
> difficulty is being detected, however I would like to fix this.
> Any help with how I might resolve this?
>
> Cheers,
> Ralph
>
>
>
> -------- Original Message --------
> Subject:     New scanner Canon MF4770N Multi function
> Date:     Mon, 16 Sep 2013 23:11:00 -0700
> From:     littlesincanada <littlesincanada at yahoo.co.uk>
> To:     sane-devel at lists.alioth.debian.org
>
>
>
> Hi,
> I got one of these (Canon MF4770N) and managed to get it to pretty much
> work with the MF4410 driver.
> I rebuilt the pixma backend and substituted the 4770N pid (04A9-2774)
> and I can get scanning *mostly* working.
>
> 1) Preview/scan in 75/150/300/600 dpi works fine in both colour and b/w.
> I do rarely get an error on the printer and I have to switch it on and
> off again. This might be a timing issue I guess.
> Cancelling scans works OK.
>
> 2) xsane will not print using the ADF. xsane generates an error and
> reckons that there is nothing in the ADF.
>
> So, looking for a bit of advice. What can I do to track this down? In
> particular, I would like to get the ADF working.
>
> Cheers,
> Ralph
>
>
>
>
>