[sane-devel] New scanner Canon MF4770N Multi function

[Rolf Bensch]

Hi Ralph,

Please log the USB protocols of a multipage ADF scan with 'export
SANE_DEBUG_PIXMA=11' and 'xsane 2> pixma.log'. The log file will be too
big for the ml. Please send it off list to my email address.

Cheers,
Rolf

Am 20.09.2013 23:20, schrieb Ralph Little:
> Hi,
> Something else that didn't quite work during last night's testing was
> loading multiple pages into the ADF.
> Using xsane, the first scan works fine.
> However, the ADF starts to load the second page towards the end of the
> first scan (fax-style) and appears to be waiting for xsane to request it.
> xsane reckons that it is finished but the scanner is not. It ends up in
> a strange situation where the scanner and xsane are out of sync.
> 
> While in this state, xsane will not perform a scan because the scanner
> is busy.
> Everything is fine after the scan is cancelled on the scanner panel.
> xsane is not expecting to be doing multiple scans in this setup.
> Perhaps the pixma driver can detect this situation and issue a cancel to
> the scanner?
> It could perform the first scan, detect if there is paper still in the
> scanner and if so, send an abort to the scanner.
> 
> If I get time, I will play around with this tonight, but my time with
> the unit is running out.
> Shame, this is a lot of fun.
> 
> Cheers,
> Ralph
> 
> 
>     ------------------------------------------------------------------------
>     *From:* Rolf Bensch <rolf at bensch-online.de>
>     *To:* littlesincanada <littlesincanada at yahoo.co.uk>
>     *Cc:* sane-devel at lists.alioth.debian.org
>     *Sent:* Friday, September 20, 2013 1:14:14 PM
>     *Subject:* Re: [sane-devel] New scanner Canon MF4770N Multi function
> 
>     Hi Ralph,
> 
>     I found a patch for different flatbed (platen) and ADF page length
>     handling. I adapted this for your scanner. Your scanner supports 11" for
>     flatbed (platen) and 14" for ADF.
> 
>     Cheers,
>     Rolf
> 
> 
>     Am 20.09.2013 16:47, schrieb Rolf Bensch:
>     > Hi Ralph,
>     >
>     > Am 20.09.2013 06:34, schrieb littlesincanada:
>     >> Hi Rolf,
>     >> OK, diff included for pixma-imageclass.c to git unstable.
>     >>
>     >> I figured out the issue with the underrun: when the printer is
>     scanning
>     >> with the ADF for Preview (full area scan), it auto detects the end of
>     >> paper and terminates the scan earlier than the sane driver is
>     expecting.
>     >> It sees the end of the paper and knows to stop at that point (nothing
>     >> left to scan).
>     >>
>     > Here the backend expects maximum paper length if you don't request a
>     > smaller format from scanimage or xsane. The scanner stops scanning
>     when
>     > the paper went through the document feeder.
>     >
>     >> It cannot do this when scanning from the platen since it doesn't know
>     >> where the end of the page is. Therefore, I don't get the warning when
>     >> Previewing from the platen.
>     >>
>     > Sure, the scanner expects 11.7" paper length, but your scanner
>     supports
>     > only 11". Please replace the device define line with this one:
>     >
>     > DEV ("Canon imageCLASS MF4770n", "MF4770", MF4770_PID, 600, 640, 825,
>     > PIXMA_CAP_ADF),
>     >
>     > This should fix this issue. Please report if this is successful. Then
>     > I'll commit your patch to git.
>     >
>     > If you don't want to scan large documents above 11" on the document
>     > feeder, I'll patch this later.
>     >
>     >> I couldn't really get any response from the buttons. My time with the
>     >> printer is running out (I have to ship it to my daughter in Uni)
>     so I'm
>     >> going to have to call it a do at that.
>     >>
>     > You can check button support with scanimage. Please follow these items
>     > for debugging:
>     >
>     > (1) Connect your scanner to the usb bus.
>     > (2) 'export SANE_DEBUG_PIXMA=11' on the console.
>     > (3) Press any button.
>     > (4) 'scanimage -A' on the console.
>     >
>     > The response from scanimage should contain these lines:
>     >
>     >  Buttons:
>     >    --button-update
>     >        Update button state
>     > [pixma] INTR T=1.655 len=32
>     > [pixma]  00000000:00 10 00 00 00 00 00 00  00 00 00 00 00 00 00 00
>     > [pixma]  00000010:00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
>     > [pixma]
>     >    --button-1 <int> [1] [read-only]
>     >        Button 1
>     >    --button-2 <int> [0] [read-only]
>     >        Button 2
>     >    --original <int> [0] [read-only]
>     >        Type of original to scan
>     >    --target <int> [1] [read-only]
>     >        Target operation type
>     >    --scan-resolution <int> [0] [read-only]
>     >        Scan resolution
>     >
>     > The [pixma] lines are from my scanner which is different from yours.
>     >
>     > (5) repeat from (3) for all other buttons.
>     >
>     > Please send me the [pixma] responses for all buttons. Then I can
>     create
>     > a patch for this.
>     >
>     > If you won't get [pixma] debug lines SANE doesn't support the buttons
>     > from your scanner.
>     >
>     > Cheers,
>     > Rolf
> 
> 
>