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73 wiersze
3.3 KiB
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<!-- received="Wed Mar 26 18:35:06 1997 MST" -->
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<!-- sent="Wed, 26 Mar 1997 18:27:10 -0700" -->
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<!-- name="David Mosberger-Tang" -->
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<!-- email="davidm@azstarnet.com" -->
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<!-- subject="Re: BW QuickCam" -->
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<!-- id="199703270127.SAA18377@panda.mosberger" -->
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<!-- inreplyto="BW QuickCam" -->
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<title>sane-devel: Re: BW QuickCam</title>
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<h1>Re: BW QuickCam</h1>
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<b>David Mosberger-Tang</b> (<a href="mailto:davidm@azstarnet.com"><i>davidm@azstarnet.com</i></a>)<br>
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<i>Wed, 26 Mar 1997 18:27:10 -0700</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#30">[ date ]</a><a href="index.html#30">[ thread ]</a><a href="subject.html#30">[ subject ]</a><a href="author.html#30">[ author ]</a>
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<li> <b>Next message:</b> <a href="0031.html">David Mosberger-Tang: "new snapshot"</a>
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<li> <b>Previous message:</b> <a href="0029.html">David Mosberger: "Re: Mustek Question, and pre0.5 Question."</a>
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<li> <b>Maybe in reply to:</b> <a href="0013.html">Guido Muesch: "BW QuickCam"</a>
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<!-- nextthread="start" -->
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</ul>
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<!-- body="start" -->
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Guido> [qcam] qc_send: sent 0x25, camera echoed 0x0f<br>
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Guido> [qcam] qc_send: (re-read does not help)<br>
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Guido> [qcam] qc_send: sent 0x68, camera echoed 0x0f<br>
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Guido> [qcam] qc_send: (re-read does not help)<br>
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Guido> [qcam] qc_send: sent 0xf6, camera echoed 0xf1<br>
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Guido> [qcam] qc_send: (re-read does not help)<br>
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Guido> [qcam] qc_send: sent 0x14a, camera echoed 0x45<br>
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Guido> [qcam] qc_send: (re-read does not help)<br>
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<p>
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You may want to try to increase the delay in qc_wait() to see whether<br>
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that gets rid of the above messages. Maybe two read_lpstatus() would<br>
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work. If not, try an idle-loop or some such.<br>
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<p>
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Guido> It seems like something does not work with the communication. BTW on<br>
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Guido> the machine I tested this I have to force the QuickCam interface into<br>
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Guido> UniDir Mode. BiDir gets detected but does not work (with the other<br>
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Guido> drivers).<br>
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<p>
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Guido> I patched qcam.c like this:<br>
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<p>
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OK, I integrated your patch. Let me know how it works (once I<br>
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uploaded & announced the latest snapshot).<br>
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<p>
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Guido> PS: OK, I did a test on another machine with working BiDir port:<br>
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<p>
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Guido> [qcam] qcam.start: bidir 246 lines of 330 pixels each (243540 bytes) => 330x246<br>
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^^^^^^^^^^^^<br>
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<p>
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This is wrong. For a gray-scale mode, only 246*330=81180 bytes should<br>
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be expected. Maybe the Bpp in sane_get_parameters() gets computed<br>
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incorrectly? I don't see anything obvious that's wrong, but the bug<br>
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must be in that area.<br>
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<p>
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--david<br>
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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.azstarnet.com/~axplinux/sane/">http://www.azstarnet.com/~axplinux/sane/</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="0031.html">David Mosberger-Tang: "new snapshot"</a>
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<li> <b>Previous message:</b> <a href="0029.html">David Mosberger: "Re: Mustek Question, and pre0.5 Question."</a>
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<li> <b>Maybe in reply to:</b> <a href="0013.html">Guido Muesch: "BW QuickCam"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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