[sane-devel] Canon laser multi-functional support: MFNP protocol

[Michael Shigorin]

On Wed, Apr 01, 2015 at 06:19:05PM +0200, Louis Lagendijk wrote:
> Before anything: if scanning over USB  does not work, trying to
> scan over the network is bound to fail.

Got that; both devices and a winxp vm are handy today (will be
there next week hopefully too), here's a 15 Mb usbsnoop log:
http://fly.osdn.org.ua/~mike/tmp/sane-pixma/Canon-iR1133-scan-300dpi.usblog.xz

> for the MF8540 first a question: what did you use to initiate the scan?

xsane and scanimage

MF8540Cdn and MF6140dn are available for testing/dumping right now,
trying against today's git...

> It looks as if a scan was not attempted. Please try (over USB):
> scanimage > filename
> and see what happens.

Proper sounds but almost completely white image:
http://fly.osdn.org.ua/~mike/tmp/sane-pixma/Canon-MF8540Cdn-scanimage.ppm.xz

> As you saw it is not clear whether the device is supported with
> the current pixma backend. Maybe somebody on the list that
> knows the backend better than I do can help you with that (the
> MF8500 series is listed in pixma_imageclass.c, so it is
> probably possible to get it working, I only wrote the
> networking code).

Thank you :-)

> the ImageRunner 1133 is listed too in the same file, so getting
> it to work is probably possible too

It _does_ work for me as of RELEASE_1_0_24-292-g8c51579:
http://fly.osdn.org.ua/~mike/tmp/sane-pixma/Canon-iR1133iF-scanimage.ppm.xz
(the same vendor provided test print)

> The MF6100 series is not listed, but it again might be quite
> possible to get it to work.

The same almost white image as with 8540:
http://fly.osdn.org.ua/~mike/tmp/sane-pixma/Canon-MF6140dn-scanimage.ppm.xz

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