[sane-devel] Canon Mx 700 - Scanbuttons

Nelson haha at mehr4u.de
Sun Aug 12 11:22:52 UTC 2012

> On Thu, 2012-05-17 at 12:13 +0200, Louis Lagendijk wrote:
>> On Thu, 2012-05-17 at 07:46 +0200, Nelson wrote:
>>>> Hey mailing list,
>>>> how can I use the scan buttons of the mx700 with lan connection?  If
>>>> I work on usb pursuing all the best.  Even the buttons.  When I run
>>>> the printer / scanner on lan work the buttons not to scan.
>>>> greets 
>>>> candyman
>> Hi,
>> Right now you can't. I wrote the network layer for the pixma backend,
>> and at the time could not figure out the button stuff. It is the only
>> part of the network stuff that does NOT work.
>> And as nobody ever asked, I never got around to look into that anymore.
>> I will put it on my TODO list to look into it again when I can find some
>> time
> hello Nelson/ list,
> I finally managed to find some time to work on the bjnp button scan
> support for the pixma backend. I got it working, although I am not
> really sure that it does not contain faults in some corner cases. As we
> are pretty close to the 1.0.23 release of sane, I will not yet commit
> the changes to git. It took me quite a while to figure out how the
> protocol works, so it has taken quite some time before I got something
> working. 
> Please let me know if you are in a hurry to test before the 1.0.23
> release is done. If so, I can mail you a patch to apply on top of the
> current git. I have only tested this with xsane, as I did not have time
> to setup scanbd, sorry. It anyhow looks as if sane and printing (bjnp
> backend for cups) can access the device at the same time: I could print
> a page while xsane was waiting for a button to be pressed. When the
> printjob was done, I was able to press the scan button again.
> Louis
> P.s. I will push my changes to git as soon as 1.0.23 is released 
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It is not in a hurry, but if you send me the patch, I can help you test for something.


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