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<TITLE>sane-devel: Re: Parallel Scanners (UMAX Astra 1220P)</TITLE>
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<H1>Re: Parallel Scanners (UMAX Astra 1220P)</H1>
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<STRONG>From:</STRONG> Doug Alcorn (<A HREF="mailto:doug@lathi.net?Subject=Re:%20Parallel%20Scanners%20(UMAX%20Astra%201220P)&In-Reply-To=&lt;x7gr9a9shma.fsf@lathi.net&gt;"><EM>doug@lathi.net</EM></A>)<BR>
<STRONG>Date:</STRONG> Wed Jun 07 2000 - 07:14:37 PDT
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&quot;Michael Franz&quot; &lt;<A HREF="mailto:mvfranz@hotmail.com?Subject=Re:%20Parallel%20Scanners%20(UMAX%20Astra%201220P)&In-Reply-To=&lt;x7gr9a9shma.fsf@lathi.net&gt;">mvfranz@hotmail.com</A>&gt; writes:
<BR>
<P><EM>&gt; It seems that only the epson and mustek scanners are supported
</EM><BR>
<EM>&gt; either directly or by treating the scanner as a SCSI device. How do
</EM><BR>
<EM>&gt; I get started with the UMAX scanners?
</EM><BR>
<P>There are two pieces to using a scanner in Linux. First, the kernel
<BR>
must be able to communicate with the device. This is rarely a
<BR>
problem; even with USB scanners. The real problem comes with what
<BR>
sane calls the &quot;backend&quot;. This is the piece that goes between the
<BR>
actual scanning user interface and the kernel itself. The backend
<BR>
must know how to control the scanner. This is different than just
<BR>
talking to the scanner.
<BR>
<P>Here's the bad news: UMAX doesn't release the command protocol for
<BR>
controlling their parallel or USB scanners. I have the UMAX 2000U
<BR>
scanner. The developement kernels (2.3.x) can recognize the scanner,
<BR>
but sane has no idea what to say to it.
<BR>
<P>You have two options. First, write a polite letter to UMAX requesting
<BR>
the scanner control information. This is probably a dead end. I have
<BR>
been doing this every so often for the last six months. The second is
<BR>
to reverse engineer the command language. I don't really know how to
<BR>
do this. I guess you would have to tap into the line (either USB or
<BR>
parallel cable) and sniff out what commands are sent under what
<BR>
situations. I think this would be very usefull (to me at least) but
<BR>
very difficult. Someone much smarter than me can comment on this.
<BR>
<PRE>
--
Doug Alcorn | Fire Todd Dickinson, reform the US Patent Office
<A HREF="mailto:doug@lathi.net?Subject=Re:%20Parallel%20Scanners%20(UMAX%20Astra%201220P)&In-Reply-To=&lt;x7gr9a9shma.fsf@lathi.net&gt;">doug@lathi.net</A> | <A HREF="http://www.andovernews.com/cgi-bin/news_column.pl?533">http://www.andovernews.com/cgi-bin/news_column.pl?533</A>
www.lathi.net |
<P>--
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