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<TITLE>sane-devel: Re: Backend for BearPaw 2400</TITLE>
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<META NAME="Author" CONTENT="Henning Meier-Geinitz (hmg-ml@gmx.de)">
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<META NAME="Subject" CONTENT="Re: Backend for BearPaw 2400">
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<H1>Re: Backend for BearPaw 2400</H1>
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<!-- received="Fri Jan 19 12:59:31 2001" -->
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<!-- name="Henning Meier-Geinitz" -->
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<!-- subject="Re: Backend for BearPaw 2400" -->
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<STRONG>From:</STRONG> Henning Meier-Geinitz (<A HREF="mailto:hmg-ml@gmx.de?Subject=Re:%20Backend%20for%20BearPaw%202400&In-Reply-To=<20010119214400.C338@vortex.swb.de>"><EM>hmg-ml@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Fri Jan 19 2001 - 12:44:00 PST
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0207.html">Laurent-jan: "Re: How to Run Parallel Port Scanner as Non-Root????"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0205.html">Henning Meier-Geinitz: "Re: some technical questions"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0204.html">Slawek Kolasinski: "Backend for BearPaw 2400"</A>
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<P>
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Hi,
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<BR>
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<P>On Fri, Jan 19, 2001 at 09:29:00PM +0100, Slawek Kolasinski wrote:
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<BR>
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<P><EM>> I would like to write a backend for Mustek BearPaw 2400 on USB -
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</EM><BR>
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<EM>> if no one else is already working on it.
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</EM><BR>
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<P>I'm writing a backend for the Bearpaw 1200. As the Scanners are
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<BR>
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probably quite similar (9831 versus 9832) they can be supported by one
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<BR>
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backend. At the moment I can read and write registers, turn on the
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<BR>
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lamp, move the slider and reset the scanner. All this seems to work
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<BR>
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for the 2400, too, as far as I can tell from the first tests. I will
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<BR>
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email you more information and my code.
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<BR>
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<P>Some documentation about the chip is at
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<BR>
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<A HREF="http://www.geocities.com/SiliconValley/Mouse/5403/">http://www.geocities.com/SiliconValley/Mouse/5403/</A>
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<BR>
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<P><EM>> I read some docs and I also looked through some backends sources. I
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</EM><BR>
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<EM>> can't understand one thing. How can I send some configuration data to
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</EM><BR>
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<EM>> my scanner using only the special file /dev/usb/scanner0? I mean that
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</EM><BR>
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<EM>> my scanner has 127 registers and I have to choose somehow which
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</EM><BR>
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<EM>> register I want to read/write.
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</EM><BR>
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<P>For some reason this isn't explained in the documentation of the
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<BR>
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National Semiconductor Merlin 9831/9832 chip. At least I couldn't find
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<BR>
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it. It's simple (copied from my mail a few days ago:)
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<BR>
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<P>You need just simple reads and writes to the /dev/usbscanner or
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<BR>
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whatever file.
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<BR>
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<P>Byte 0: read (1) or write (0). Use incremental write/read: add 2.
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<BR>
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Byte 1: register number
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<BR>
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Byte 2: bytes to write/read MSB
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<BR>
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Byte 3: bytes to write/read LSB
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<BR>
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<P>For a write just add the buffer you want to send (e.g. for writing to
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<BR>
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one register, you would have 5 bytes total). For a read, write the
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<BR>
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four bytes and read as many bytes as specified after that.
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<BR>
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<P><EM>> I figured out that ESCape (0x1B)
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</EM><BR>
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<EM>> character has samoe special meaning because it's always sent as the
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</EM><BR>
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<EM>> first byte - how does it work? Could someone answer me?
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</EM><BR>
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<P>That maybe correct for the HP scanners. For the Bearpaw 2400 and 1200
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<BR>
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it doesn't have a special meaning. By the way, the Bearpaw 1200F seems
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<BR>
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to be a completely different scanner, it uses a chip named "Mustek
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<BR>
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1509".
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<BR>
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<P>Bye,
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<BR>
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Henning
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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:%20Backend%20for%20BearPaw%202400&In-Reply-To=<20010119214400.C338@vortex.swb.de>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0207.html">Laurent-jan: "Re: How to Run Parallel Port Scanner as Non-Root????"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0205.html">Henning Meier-Geinitz: "Re: some technical questions"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0204.html">Slawek Kolasinski: "Backend for BearPaw 2400"</A>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Fri Jan 19 2001 - 13:00:16 PST</EM>
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