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<!-- received="Wed Dec 8 15:59:49 1999 PST" -->
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<!-- sent="Wed, 8 Dec 1999 16:00:26 -0800 (PST)" -->
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<!-- name="Mathew sienko x7439" -->
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<!-- email="msienko@galaxy.nsc.com" -->
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<!-- subject="Re: Volunteer for back end development - excellent info in this msg" -->
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<!-- id="199912090000.QAA14367@sodium.nsc.com" -->
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<!-- inreplyto="Pine.LNX.4.10.9912081627490.2875-100000@draconix.natinst.com" -->
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<title>sane-devel: Re: Volunteer for back end development - excellent info in this msg</title>
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<h1>Re: Volunteer for back end development - excellent info in this msg</h1>
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<b>Mathew sienko x7439</b> (<a href="mailto:msienko@galaxy.nsc.com"><i>msienko@galaxy.nsc.com</i></a>)<br>
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<i>Wed, 8 Dec 1999 16:00:26 -0800 (PST)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#80">[ date ]</a><a href="index.html#80">[ thread ]</a><a href="subject.html#80">[ subject ]</a><a href="author.html#80">[ author ]</a>
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<li> <b>Next message:</b> <a href="0081.html">David Paschal: "Re: Volunteer for back end development - excellent info in this msg"</a>
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<li> <b>Previous message:</b> <a href="0079.html">David E. Nelson: "Volunteer for back end development - excellent info in this msg"</a>
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</ul>
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Hi David,<br>
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<p>
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I'm glad to see that you are still interested. If you do plan on experamenting,<br>
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then perhaps I should what I've been thinking about. I haven't actually<br>
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started working on this yet because we've been quite buisy lately, but<br>
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I hope to start soon. <br>
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<p>
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The merlin chips are all controlled through a register file and everything<br>
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is done by reading or writing these registers. The datasheet describes<br>
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these registers. The backend should then have two parts: functions to <br>
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read and write these registers, and then the SANE API implementation that<br>
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actually uses these functions to controll the scanner. This way, the <br>
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interface can change and all the SANE API's can still be used. (Future<br>
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versions of merlin may use a different interface, but this is still too<br>
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far away to tell.) My first goal is to be able to read and write one <br>
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register at a time. If I get any work done on this, I'll post it to <br>
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the sane mailing list.<br>
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<p>
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I also have a question that I am hoping you will be able to answer. In<br>
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SANE, the back-ends can be built as shared libraries so that an application<br>
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can easily change back-ends. Would it be easy (or possible) to separate<br>
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the two functionalities I mentioned above into two separate library files?<br>
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Also, can an application load and unload these back-end libraries while<br>
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it is running? I think this would be cool because then an application <br>
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could launch that is not tied to a specific scanner and the user could<br>
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choose which driver to use and, for the merlin driver, choose the I/O <br>
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interface if necessary.<br>
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<p>
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Matt<br>
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<i>> </i><br>
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<i>> </i><br>
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<i>> Hi Mathew,</i><br>
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<i>> </i><br>
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<i>> I really dropped the ball on this one. I had hoped to 'experiment' with</i><br>
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<i>> my 4200 using the pdf docs from NatSemi...just havn't had time to sit down</i><br>
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<i>> with it. I've forward this to the sane-devel list since that should be</i><br>
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<i>> the best source for developers. I did ask Peter if he could recommend</i><br>
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<i>> anyone and noone came to his mind.</i><br>
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<i>> </i><br>
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<i>> Regards,</i><br>
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<i>> /\/elson</i><br>
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<i>> </i><br>
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<p>
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<p>
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<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">majordomo@mostang.com</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0081.html">David Paschal: "Re: Volunteer for back end development - excellent info in this msg"</a>
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<li> <b>Previous message:</b> <a href="0079.html">David E. Nelson: "Volunteer for back end development - excellent info in this msg"</a>
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<!-- nextthread="start" -->
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</ul>
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