sane-project-website/old-archive/1998-07/0132.html

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<title>sane-devel: Re: developing plustek driver-- questions</title>
<h1>Re: developing plustek driver-- questions</h1>
<b>Jon Knight</b> (<a href="mailto:jon@net.lut.ac.uk"><i>jon@net.lut.ac.uk</i></a>)<br>
<i>Wed, 22 Jul 1998 17:47:13 +0100 (BST)</i>
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On Wed, 22 Jul 1998, Antal Novak wrote:<br>
<i>&gt; Well... maybe further down the line.  At this point, all I'm interested in</i><br>
<i>&gt; is a working SANE driver.</i><br>
<p>
Fair enough. <br>
 <br>
<i>&gt; Do other parallel port drivers require kernel support?</i><br>
<p>
Looking at backend/mustek.c, it seems to call routines in<br>
sanei/sanei_ab306.c which look to be userland (it uses ioperm to get<br>
access to the parallel port registers).  The backend/epson.c also seems to<br>
use sanei/sane_pio.c which also seems to be userland and busy waits.  Not<br>
having a mustek or epson parallel port scanner myself I can't really say<br>
what the performance is like but I wouldn't expect it to be stellar<br>
(though I'm more than happy to be told I'm wrong and shutup!)<br>
<p>
Tatty bye,<br>
<p>
Jim'll<br>
<p>
#!/usr/bin/perl -- -Whois++-client-in-6-lines-of-Perl -Beat-that-Z39.50! <br>
use IO::Socket;sub w{$f=shift;$a{$f}=1;($h,$p,$q)=split("/",$f);$s=<br>
IO::Socket::INET-&gt;new(PeerAddr=&gt;"$h:$p")||return;print $s "$q\r\n";while(&lt;$s&gt;)<br>
{next if(/^%/);if(/^# SERVER-TO-ASK/){while(&lt;$s&gt;){$x=$1 if/Name: (.*)\r\n$/;$y<br>
=$1 if/Port: (.*)\r\n$/;$f="$x/$y/$q";@j=(@j,$f)if(/^# END/&amp;&amp;!$a{$f})}}else{<br>
print}}close($s)}@j=shift;while(@j){w(pop(@j))}# whois++.pl host/port/query<br>
<p>
<p>
<pre>
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