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<TITLE>sane-devel: Re: Acer620UT</TITLE>
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<META NAME="Author" CONTENT="Oliver Schwartz (Oliver.Schwartz@gmx.de)">
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<META NAME="Subject" CONTENT="Re: Acer620UT">
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<H1>Re: Acer620UT</H1>
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<!-- name="Oliver Schwartz" -->
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<STRONG>From:</STRONG> Oliver Schwartz (<A HREF="mailto:Oliver.Schwartz@gmx.de?Subject=Re:%20Acer620UT&In-Reply-To=<00073014175401.00493@oliverspc>"><EM>Oliver.Schwartz@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun Jul 30 2000 - 04:50:55 PDT
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Hi,
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<BR>
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<BR>
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<EM>> I wasn't sure what to do about the USB code when I updated the snapscan driver for
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</EM><BR>
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<EM>> colour correction. Iwanted to merge everyone's latest goodies, but I had no way to
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</EM><BR>
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<EM>> test them. I merged the parts of the USB which go into the other files, and the
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</EM><BR>
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<EM>> transparency patch, since they were pretty minor, and made sense in relation to
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</EM><BR>
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<EM>> the rest of the driver. If you find the whole thing runs acceptably with a 620UT
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</EM><BR>
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<EM>> its probably time to stuff the remaining elements of the USB update - the actual
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</EM><BR>
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<EM>> USB interface itself - into CVS.
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</EM><BR>
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<P>The code works for me. It isn't bullet proof and still has a lot of problems
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<BR>
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related to it. The main problem I recognize is that it requires a lot of
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<BR>
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manual interaction:
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<BR>
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(1) modify code (or supply an option during compilation)
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<BR>
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(2) fiddle with kernel modules
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<BR>
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(3) upload firmware.
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<BR>
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<P>(1) prevents the code from being usable in binary distributions,
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<BR>
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(2) may change with kernel 2.4 and more wide-spread USB,
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<BR>
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(3) would require some smart algorithm that recognises the scanner and uploads
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<BR>
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the apropriate firmware file.
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<BR>
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<P>The USB code itself is pretty simple, as far as I can see. It more or less
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<BR>
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sends the raw SCSI commands to the USB interface. As far as I know this is also
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<BR>
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done in other backends (hp?), so maybe it would make sense to have a common
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<BR>
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sane USB layer. This would probably solve (1).
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<BR>
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<P>As far as firmware is concerned I don't know if other backends need firmware
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<BR>
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uploads as well. If so a common solution would probably make sense.
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<BR>
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<P>However, as a first step I think it would make sense to put all USB related
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<BR>
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files (snapscan-usb.*, acerfirm, agfafirm) into CVS so that people who want to
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<BR>
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try USB don't have to get them from 3 different sources.
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<BR>
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<P>Oliver
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<BR>
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<P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Acer620UT&In-Reply-To=<00073014175401.00493@oliverspc>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0250.html">Daniel Gräfe: "Gimp-Plugin: GIMP support missing"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0242.html">Steve Underwood: "Re: Acer620UT"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0247.html">Paul Nixon: "Re: Acer620UT"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sun Jul 30 2000 - 05:08:45 PDT</EM>
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