[sane-devel] Canoscan 3000F backend dev started

Ralph Little skelband at gmail.com
Sun Jan 19 01:21:51 GMT 2020


On 2020-01-15 11:20 p.m., Klaus Kämpf wrote:
> I have captured some scan conversations over USB and I have to say 
> that I do
>> not recognise the exchange from my experience with the Scanjet 3670.
> can you post / deposit the usb capture data somewhere for me to take a
> look ?

75dpi 1"x1" in colour
100dpi 1"x1" in colour
> Does it have a network port ? Does Windows recognize the scanner
> automatically ? Try to capture these initial conversations.

I have done some analysis of the data stream as well which I will share 
perhaps tomorrow. Going out tonight. :)

I'm hoping that someone can recognise the protocol as something we 
already support.
If not, I'm quite happy to do a new backend, but I would like to try to 
avoid that.
This is quite an old scanner (2007 I think). It doesn't look to have 
anything Genesys related in it.
It certainly looks a lot different to GL646 that I have seen.

I have managed to detect retrievals of button pushes but I'm just trying 
to suss out the run up to it to get context.
The scans on Google Drive above contain a lot of USB polling noise. 
There is a constant conversation with the scanner even when nothing is 
happening. Almost certainly this is about monitoring the various sensors 
but I could not find a way to switch it off which would make it easier 
to follow an actual scan.


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