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Code Editor : sane-umax-config-doc.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="Author" content="Oliver Rauch"> <meta name="Description" content="unix scanner driver for UMAX scanners"> <title>SANE-umax - Configuration</title> </head> <body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000"> <table> <tr> <td width=200> <img SRC="sane-logo.jpg" alt="SANE-logo" hspace=60 align=BOTTOM> <br> <img SRC="sane-umax-text.jpg" alt="UMAX-logo" HSPACE=50> </td> <td> <blockquote> <h1><font color="#009900">Configuration</font></h1> </blockquote> </td> </tr> </table> <hr WIDTH="100%"> <table> <tr> <td VALIGN=TOP WIDTH="250" BGCOLOR="#E0E0FF"> <br> <ul> <li><a href="sane-umax-doc.html">Index</a></li> <li> Frontend options: <ul> <li><a href="sane-umax-standard-options-doc.html">Standard options</a></li> <li><a href="sane-umax-advanced-options-doc.html">Advanced options</a></li> </ul> </li> <li> Supported scanners: <ul> <li><a href="sane-umax-powerlook-doc.html">Power Look series</a></li> <li><a href="sane-umax-mirage-doc.html">Mirage series</a></li> <li><a href="sane-umax-astra-doc.html">Astra series</a></li> <li><a href="sane-umax-vista-doc.html">Vista series</a></li> <li><a href="sane-umax-uc-doc.html">UC series</a></li> <li><a href="sane-umax-others-doc.html">others</a></li> <li><a href="sane-umax-not-listed-doc.html">Not listed scanners</a></li> <li><a href="sane-umax-scanner-clones-doc.html">UMAX scanner clones</a></li> </ul> </li> <li><a href="sane-umax-parport-doc.html">UMAX parallel port scanners</a></li> <li><a href="sane-umax-config-doc.html">Configuration</a></li> <li><a href="sane-umax-speed-doc.html">Speed of UMAX scanners</a></li> <li><a href="http://www.rauch-domain.de/sane-umax">SANE-umax homepage</a></li> <li><a href="http://www.sane-project.org">SANE homepage</a></li> <li><a href="http://www.xsane.org/">XSane homepage</a></li> </ul> <br> </td> <td VALIGN=TOP BGCOLOR="#FFFFFF"> <blockquote> <br> <h2> CONFIGURATION: </h2> <blockquote>The configuration file for this backend resides in <dl> <dd> /usr/local/etc/sane.d/umax.conf. </dd> </dl> </blockquote> <blockquote> Its contents is a list of options and device names that correspond to UMAX scanners. Empty lines and lines starting with a hash mark (#) are ignored. A sample configuration file is shown below: <br> <dl> <dd>option scsi-buffer-size-min 65536</dd> <dd>option scsi-buffer-size-max 131072</dd> <dd>option scan-lines 40</dd> <dd>option preview-lines 10</dd> <dd>option scsi-maxqueue 2</dd> <dd>option handle-bad-sense-error 0</dd> <dd>option execute-request-sense 0</dd> <dd>option force-preview-bit-rgb 0</dd> <dd>option slow-speed -1</dd> <dd>option care-about-smearing -1</dd> <dd>option calibration-full-ccd -1</dd> <dd>option calibration-width-offset -1</dd> <dd>option calibration-bytes-pixel -1</dd> <dd>option invert-shading-data -1</dd> <dd>option lamp-control-available 0</dd> <dd>#scsi Vendor Model Type Bus Channel ID LUN</dd> <dd>scsi UMAX * Scanner * * * * *</dd> <dd>/dev/scanner</dd> <dd># this is a comment</dd> <dd>/dev/sge</dd> </dl> </blockquote> <blockquote> The special device name must be a generic SCSI device or a symlink to such a device. To find out to which device your scanner is assigned and how you have to set the permissions of that device, have a look at <a href="http://www.sane-project.org/man/sane-scsi.5.html">sane-scsi</a>. </blockquote> <blockquote> When the generic scsi driver of the system supports selection of scsi buffer sizes the umax backend calculates the scsi buffer sizes in dependence of the numbers of bytes per scanline. With <i>scsi-buffer-size-min</i> and <i>scsi-buffer-size-max</i> the scsi buffer size can be defined in a range between 4KB and 1MB. Especially the minimum value is very important. If this value is set too small the backend is not able to send gamma tables to the scanner or to do a correct color calibration. This may result in strange color effects. If the minimum value is set too large then the backend is not able to allocate the requested scsi buffer size and aborts with out of memory error. The default is 32KB, for some scanners it should be increased to 64KB. <p> The option <i>scan-lines</i> defines the number of lines that shall be scanned with one scsi read command for a real scan. The number of lines that are read with one scsi command for preview scans are defined by the option <i>preview-lines</i>. Both have to be in the range between 1 and 65536. <p> With the option <i>scsi-maxqueue</i> you can define the number of scsi commands that shall be queued. UMAX scanners do not support command queueing - as far as I know. But some scsi controller drivers do support queueing in the kernel. In this case it does not make sense to queue more than 2 commands. <p> When you are able to do color previews but color scans do not work you can set the option <i>force-preview-bit-rgb 1</i>. This always sets the preview bit when acquiring a color scan. The image quality may be reduced. <p> Some scanners (especially very old scanners) may need the options <i>slow-speed</i> and/or <i>care-about-smearing</i>. The value -1 uses the value defined by the driver, 0 disables the feature, 1 enables the feature. <b>Do not change these options unless you really know what you do, you can destroy your scanner by setting wrong values for this options!!!</b> <p> Some scsi drivers (or may be some scanners) do return an invalid error code when a scsi command is executed. There are different ways to handle such bad error codes. You can define the behaviour of the umax-backend by setting the option <i>handle-bad-sense-error</i> in umax.conf. You can set the following values:<br> <dl> <dd>0 : handle as device busy</dd> <dd>1 : handle as ok</dd> <dd>2 : handle as i/o error</dd> <dd>3 : ignore bad error code, continue sense handler</dd> </dl> In most cases it does work when this condition is handled as a device busy state so this is the default (0). <p> The option <i>execute-request-sense</i> disables(0) or enables(1) the scsi command REQUEST_SENSE. The command can be called when the scanner asks the driver to do calibration. The driver does not know the required calibration parameters for all scanners. Some scanners return the needed parameters when the driver executes the REQUEST_SENSE command. But there is a problem with the REQUEST_SENSE command on some systems with some scsi controller drivers. This can cause a system hang. So the safe way is to disable the REQUEST_SENSE command, but the driver may not be able to do correct calibration in this case. <p> For some scanners the calibration has to be done by the driver. For this the driver has to know some values about the calibration data. When the REQUEST_SENSE command is disabled or the scanner does not return the correct data the driver needs to know the correct parameters. For some scanners the parameters are stored in the driver. When these values are not set correct the image might look very strange. To be sure that you have a problem with the calibration please enable debug output. <p> <i>calibration-full-ccd</i>:<br> The calibration can be done for each element of the CCD (1) or for each pixel of the requested image(0). The value -1 enables the value defined in the driver. <p> <i>calibration-width-offset</i>:<br> Some scanners use more pixels than calculated by image/CCD parameters. A value larger or equal 0 defines the offset. The value -1 enables the value defined in the driver. <p> <i>calibration-bytes-pixel</i>:<br> Some scanners use 1 byte calibration data although the scanner supports more than 8 bits/pixel. You can define 1 or 2 bytes per pixel calinration data. The value -1 enables the value defined in the driver. <p> <i>invert-shading-data</i>:<br> Some scanners need inverted shading data (1), others need original shading data (0). The value -1 enables the value defined in the driver. </blockquote> <h2> SCSI ADAPTER TIPS:</h2> <blockquote> The UMAX-scanners do block the scsi-bus for a few seconds while scanning. It is not necessary to connect the scanner to its own SCSI-adapter. But if you need short response time for your SCSI-harddisk (e.g. if your computer is a file-server), I suggest you use an own SCSI-adapter for your UMAX-scanner. </blockquote> <blockquote> The SCSI-adapters that are shipped with some Umax-scanners are very simple ones. I suggest not to use them. If you really want to try: the UDS-IS11 uses a DTC3181E chip (compatible to NCR5380). On linux you may have the chance to get it work with the recent g_NCR5380-driver. The card does not have IRQ/DMA. Try the following option for kernel boot option: <p> dtc_3181e=0x280,255 <p> or use the following command: <p> insmod g_NCR5380 ncr_irq=255 ncr_addr=0x280 dtc_3181e=1 <p> - ncr_irq=255 : no IRQ, no DMA <br> - ncr_irq=254 : autoprobe IRQ <br> - ncr_addr : can be: 0x220 0x240 0x280 0x2A0 0x2C0 0x300 0x320 0x340 <br> <p> For <a href="http://support.umax.co.uk/technotes/f096B.htm">information about the umax-scsi-cards</a> take a look here. </blockquote> <blockquote> See the relevant hardware FAQs and HOWTOs for your platform for more information. <br>See also: <a href="http://www.sane-project.org/man/sane-scsi.5.html">sane-scsi</a> </blockquote> <h2>FILES:</h2> <blockquote> <ul> <li>The backend configuration file: /usr/local/etc/sane.d/umax.conf</li> <li>The static library implementing this backend: /usr/local/lib/sane/libsane-umax.a</li> <li> The shared library implementing this backend : /usr/local/lib/sane/libsane-umax.so<br> (present on systems that support dynamic loading) </li> </ul> </blockquote> <h2>ENVIRONMENT:</h2> <blockquote> <ul> <li>SANE_DEBUG_UMAX</li> </ul> </blockquote> <blockquote> If the library was compiled with debug support enabled, this environment variable controls the debug level for this backend. E.g., a value of 128 requests all debug output to be printed. Smaller levels reduce verbosity: </blockquote> <center> <table BORDER> <tr BGCOLOR="#40E0D0"> <td VALIGN=TOP COLSPAN="2"><b><font face="Arial">SANE_DEBUG_UMAX values</font></b></td> </tr> <tr> <td WIDTH="10%"> <address> <b>Number</b></address> </td> <td WIDTH="90%"> <address> <b>Remark</b></address> </td> </tr> <tr> <td> <address> 0</address> </td> <td>print important errors (printed each time)</td> </tr> <tr> <td> <address> 1</address> </td> <td>print errors</td> </tr> <tr> <td>2</td> <td>print sense</td> </tr> <tr> <td> <address> 3</address> </td> <td>print warnings</td> </tr> <tr> <td>4</td> <td>print scanner-inquiry</td> </tr> <tr> <td> <address> 5</address> </td> <td>print information</td> </tr> <tr> <td>6</td> <td>print less important information</td> </tr> <tr> <td>7</td> <td>print called procedures</td> </tr> <tr> <td>8</td> <td>print reader_process messages</td> </tr> <tr> <td> <address> 10</address> </td> <td>print called sane-init-routines</td> </tr> <tr> <td> <address> 11</address> </td> <td>print called sane-procedures</td> </tr> <tr> <td> <address> 12</address> </td> <td>print sane-infos</td> </tr> <tr> <td> <address> 13</address> </td> <td>print sane option control messages</td> </tr> </table></center> <h4>Example:</h4> <blockquote> export SANE_DEBUG_UMAX=8 </blockquote> <center> <hr WIDTH="100%"> <br> <font color="#009900">This page has been changed on 27th. february 2001</font> <br> <br> </center> </blockquote> </td> </tr> </table> <hr WIDTH="100%"> <blockquote> Author: <a href="mailto:Oliver.Rauch@rauch-domain.de">Oliver Rauch</a> </blockquote> </body> </html>
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