plustek: CanoScan N1220U with Testversion 0.45-TEST5 gives I/O error
Subject:
Re: CanoScan N1220U with Testversion 0.45-TEST5 gives I/O error
From:
Marc Lavergne ####@####.####
Date:
7 Jan 2003 14:04:21 -0000
Message-Id: <20030107135623.85366.qmail@web10708.mail.yahoo.com>
Terrific, thanks for the clarifications! I cleaned up
the sane libs and did a clean 1.0.9 install so I can
follow changes to the Plustek driver more closely.
The header notes in checkmerlin.c mentioned 1.0.8 and
checkmerlin does work as intended, that's why I
thought (mistakenly) I might be onto something.
Thanks again,
Marc
--- Gerhard Jaeger ####@####.#### wrote:
> Hi,
>
> the changes you notice should be somewhat
> transparent
> to any backend that uses them. The handle fd or
> later on
> dn is simply a value that should reference the
> correct device.
> This value can or better will be obtained by a
> sanei_usb_open()
> call. That's all...
>
> On Montag, 6. Januar 2003 23:06, Marc Lavergne
> wrote:
> > Just as a side note, I noticed that between 1.0.8
> and
> > 1.0.9 of Sane, the sanei_usb_write/read_bulk
> function
> > appeared to change in a fairly significant way:
> >
> > 1.0.8:
> > ------
> > sanei_usb_write_bulk (SANE_Int fd, ...
> > {
> > ...
> > write_size = write (fd, buffer, *size);
> > ...
> > }
> >
> > 1.0.9:
> > ------
> > sanei_usb_write_bulk (SANE_Int dn, ...
> > {
> > ...
> > write_size = write (devices[dn].fd, buffer,
> *size);
> > ...
> > }
> >
> > When I look at sanei_lm983x.c in PLustek
> 0.45-TEST5, I
> > see the following:
> > ...
> > sanei_usb_write_bulk( fd, command_buffer, &size
> );
> > ...
> >
> >
> > I do get further into the debug stack when using
> 1.0.8
> > with 0.45-TEST5 than with 1.0.9. Am I correct in
> > assuming that 0.45-TEST5 works with 1.0.8 but not
> > 1.0.9?
>
> No, at least if should work with both versions. To
> be honest, I've
> not testet 1.0.8, but I'm working with 1.0.9...
> One hint, beofre hunting any ghosts here, make sure
> not to mix
> binary installed libraries and self-compiled stuff -
> be sure to clean
> all sane-stuff. Then recompile and install again,
> this should cure
> the strange behaviour you have. Sometimes it
> happens,
> that you need to replug your scanner after the whole
> box is up.
> This behaviour seems to be relatet to the USB
> subsystem...
>
> Hope this helps a bit
> Gerhard
>
>
> >
> > Thanks,
> >
> > Marc
>
>
>
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