[sane-devel] New scanner Canon MF4770N Multi function

[Ralph Little]

Hi,
Many thanks.
I will try the latest builds tonight.
I am currently runnin on 1.0.23 via Linux Mint (derived from Ubuntu Ringtail).

One other thing which I would like to look into is that if the pixma driver misinterprets the ADF paper situation and attempts to perform a scan anyway, it gets locked into a loop while conversing with the scanner and getting errors which cannot be user terminated with the cancel button. It appears to be asking for an ADF scan but the printer is refusing. I will see if I can get to the bottom of that.

I will also look into the panel button notifications.

Cheers!
Ralph





>________________________________
> From: Rolf Bensch <rolf at bensch-online.de>
>To: littlesincanada <littlesincanada at yahoo.co.uk>; sane-devel at lists.alioth.debian.org 
>Sent: Thursday, September 19, 2013 12:59:34 PM
>Subject: Re: [sane-devel] New scanner Canon MF4770N Multi function
> 
>
>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
>>
>>
>>
>>
>>
>
>
>
>
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