sane-project-website/old-archive/1999-02/0142.html

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<title>sane-devel: Re: resolution option unknown</title>
<h1>Re: resolution option unknown</h1>
<b>Heinrich Rebehn</b> (<a href="mailto:rebehn@comm.uni-bremen.de"><i>rebehn@comm.uni-bremen.de</i></a>)<br>
<i>Mon, 22 Feb 1999 08:23:23 +0000</i>
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<li> <b>Next message:</b> <a href="0143.html">Dr. Andreas Bolsch: "Re: resolution option unknown"</a>
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<p>
Rene Vellekoop wrote:<br>
<i>&gt; </i><br>
<i>&gt; Hi there!</i><br>
<i>&gt; </i><br>
<i>&gt; I use a Mustek 600 II N scanner. 'scanimage -L' returns:</i><br>
<i>&gt; </i><br>
<i>&gt; device `pnm:0' is a Noname PNM file reader virtual device</i><br>
<i>&gt; device `pnm:1' is a Noname PNM file reader virtual device</i><br>
<i>&gt; device `mustek:0x36b' is a Mustek MFC-06000CZ flatbed scanner</i><br>
<i>&gt; </i><br>
<i>&gt; Looks quite nice I think, the scanner moves about a centimeter up and down, lamp</i><br>
<i>&gt; goes on, no problem..</i><br>
<i>&gt; </i><br>
<i>&gt; But when I acctually want to scan an image the scanner gives me the same action</i><br>
<i>&gt; as the 'initialisation' as mentioned above but then locks up.  CTRL-C sais:</i><br>
<i>&gt; stopping scanner... but this has no effect I have to kill the scanimage process</i><br>
<i>&gt; and a 0 byte output file remains.</i><br>
<p>
I think i had a similar problem (with sane pre-1.00). The solution is an<br>
'usleep' inserted in sanei/sanei_ab306.c:<br>
***************<br>
/* Send a single command-byte over the AB306N-interface.  */<br>
static void<br>
ab306_cout (Port *p, int val)<br>
{<br>
  u_long base = p-&gt;base;<br>
  <br>
  usleep(100);	&lt;&lt;&lt;================<br>
  while ((ab306_inb (p, base + 1) &amp; 0x80));     /* wait for dir flag */<br>
  ab306_outb (p, base, val);<br>
  ab306_outb (p, base + 1, 0xe0);<br>
  while ((ab306_inb (p, base + 1) &amp; 0x80) == 0);        /* wait for ack<br>
*/<br>
  ab306_outb (p, base + 1, 0x60);<br>
}<br>
****************<br>
I forgot who originally sent this patch to the mailing list.<br>
<p>
Also, you need a patch enabling correct color scanning, which i attach<br>
to this message. Again, i don't know the original author. I also don't<br>
know if these patches are already integrated in the current sane<br>
version.<br>
<p>
The Mustek 600 II N that we have at our institute is working fine with<br>
these patches, however sometimes there are colored horizontal stripes at<br>
the upper or at the lower edge of the picture. My remedy is to scan a<br>
larger area and then crop with xv or gimp.<br>
<p>
good luck.<br>
<pre>
-- 
<p>
Heinrich Rebehn
<p>
University of Bremen
Physics / Electrical and Electronics Engineering
- Department of Telecommunications -
<p>
E-mail: <a href="mailto:rebehn@comm.uni-bremen.de">mailto:rebehn@comm.uni-bremen.de</a>
Phone : +49/421/218-4664
Fax   :            -3341
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diff -ruN sane-0.72.orig/backend/mustek.c sane-0.72/backend/mustek.c
--- sane-0.72.orig/backend/mustek.c	Tue Mar  3 04:02:43 1998
+++ sane-0.72/backend/mustek.c	Thu Apr  9 01:10:58 1998
@@ -1394,7 +1394,7 @@
 	}
     }
 
-  num_saved_lines = s-&amp;gt;ld.index[0] - s-&amp;gt;ld.index[2];
+  num_saved_lines = s-&amp;gt;ld.index[0] - s-&amp;gt;ld.index[1];
   if (num_saved_lines &amp;gt; 0)
     /* restore the previously saved lines: */
     memcpy (out, s-&amp;gt;ld.buf[0], num_saved_lines * bpl);
@@ -1404,7 +1404,7 @@
       if (++s-&amp;gt;ld.lmod3 &amp;gt;= 3)
 	s-&amp;gt;ld.lmod3 = 0;
 
-      c = color_seq[s-&amp;gt;ld.lmod3];
+      c = s-&amp;gt;ld.lmod3;
       if (s-&amp;gt;ld.index[c] &amp;lt; 0)
 	++s-&amp;gt;ld.index[c];
       else if (s-&amp;gt;ld.index[c] &amp;lt; s-&amp;gt;params.lines)
@@ -1421,17 +1421,17 @@
 		  DBG (1, "fix_line_distance_pp: lmod3=%d, index=(%d,%d,%d)\n",
 		       s-&amp;gt;ld.lmod3,
 		       s-&amp;gt;ld.index[0], s-&amp;gt;ld.index[1], s-&amp;gt;ld.index[2]);
-		  num_lines = s-&amp;gt;ld.index[2] - s-&amp;gt;ld.ld_line;
+		  num_lines = s-&amp;gt;ld.index[1] - s-&amp;gt;ld.ld_line;
 
 		  /* copy away the lines with at least one missing
 		     color component, so that we can interleave them
 		     with new scan data on the next call */
-		  num_saved_lines = s-&amp;gt;ld.index[0] - s-&amp;gt;ld.index[2];
+		  num_saved_lines = s-&amp;gt;ld.index[0] - s-&amp;gt;ld.index[1];
 		  memcpy (s-&amp;gt;ld.buf[0], out + num_lines * bpl,
 			  num_saved_lines * bpl);
 
 		  /* notice the number of lines we processed */
-		  s-&amp;gt;ld.ld_line = s-&amp;gt;ld.index[2];
+		  s-&amp;gt;ld.ld_line = s-&amp;gt;ld.index[1];
 		  /* return number of complete (r+g+b) lines */
 		  return num_lines;
 		}
<p>
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<p>
<p>
<pre>
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</pre>
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<p>
<ul>
<!-- next="start" -->
<li> <b>Next message:</b> <a href="0143.html">Dr. Andreas Bolsch: "Re: resolution option unknown"</a>
<li> <b>Previous message:</b> <a href="0141.html">Oliver Rauch: "NEW: xsane-0.12 available"</a>
<li> <b>Maybe in reply to:</b> <a href="0130.html">Rene Vellekoop: "resolution option unknown"</a>
<!-- nextthread="start" -->
<li> <b>Next in thread:</b> <a href="0143.html">Dr. Andreas Bolsch: "Re: resolution option unknown"</a>
<!-- reply="end" -->
</ul>