[sane-devel] Canon MF8330

[Vasily Olekhov]

Teemu, greetings.
I've tried to add support for MF4410 (class 0x2727) just as you said, with
no luck.
I dug further. I've got USB traffic from windows machine and noticed that
command for receiving image data has changed from 0xd420 to 0xd460 with
slightly different parameters.

I think you should connect your scanner to windows machine and snoop
traffic with some software (I was using USBlyzer). Next, you should analyze
commands sent out and answers received in. It should look like:

> db 20 .... (start session)
< 06 06 (OK)
> dd 20 .... (select source)
< 06 06 ... (OK, some params)
> f3 20 ... (query status)
< 06 06 ... (OK, status report)
> de 20 ... (set scan parameters)
< 06 06 ... (OK)
> d4 60 .... (get data)
< 06 06 .... <data> (get ~64k of data)
> d4 60 .... (get data)
< 06 06 .... <data> (get ~64k of data)
> d4 60 .... (get data)
< 06 06 .... <data> (get ~64k of data)


2011/11/30 Teemu Suikki <zuikkis at gmail.com>

> Hi!
>
> I have a Canon MF8330 multifunctional device..
>
> Initially, sane-find-scanner reported:
> found USB scanner (vendor=0x04a9 [Canon,Inc.], product=0x2708
> [MF8330]) at libusb:001:010
>
> But sane didn't support it, so scanimage didn't work.
>
> I noticed that pixma_imageclass.c has (untested) support for MF8030..
> MF8330 and MF8030 look identical and the USB device ID is off by only
> one, so I figured that might work. :)
>
> I added MF8330 to pixma_imageclass.c by simply copy-pasting all
> references of MF8030.
>
> Now, sane detects the scanner. I tried scanning with scanimage. The
> scanner performs correct looking operation, the head moves correctly
> and the scanner reports it is scanning. However, when scanning is
> finished, the scanner display reports "Cancelled" and scanimage fails
> with:
>
> scanimage: sane_read: Error during device I/O
>
> Any ideas? Are there any easy debug options I could add?
>
> --
> Teemu Suikki
> http://www.ksportfinland.com
> http://www.z-power.fi/
>
> --
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