.TH sane\-canon_dr 5 "09 Oct 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy" .IX sane\-canon_dr .SH NAME sane\-canon_dr \- SANE backend for Canon DR-series scanners .SH DESCRIPTION The .B sane\-canon_dr library implements a SANE (Scanner Access Now Easy) backend which provides access to some Canon DR-series scanners. This document describes backend version 8, slated to ship with SANE 1.1.0. .SH SUPPORTED HARDWARE This version has only been tested with the DR\-9080C and DR\-7580. Please see http://www.sane\-project.org/sane\-supported\-devices.html for a more recent list. This backend may support other Canon scanners. The best way to determine level of support is to test the scanner directly, or to collect a trace of the windows driver in action. Please contact the author for help or with test results. .SH OPTIONS Effort has been made to expose most hardware options, including: .PP source s .RS Selects the source for the scan. Options may include "Flatbed", "ADF Front", "ADF Back", "ADF Duplex". .RE .PP mode m .RS Selects the mode for the scan. Options may include "Lineart", "Halftone", "Gray", and "Color". .RE .PP resolution, y\-resolution .RS Controls scan resolution. Setting \-\-resolution also sets \-\-y\-resolution, though this behavior is overridden by some frontends. .RE .PP tl\-x, tl\-y, br\-x, br\-y .RS Sets scan area upper left and lower right coordinates. These are renamed t, l, x, y by some frontends. .RE .PP page\-width, page\-height .RS Sets paper size. Used by scanner to determine centering of scan coordinates when using ADF and to detect double feed errors. .RE .PP Other options will be available based on the capabilities of the scanner: enhancement, compression, buttons and sensors, etc. Use 'scanimage \-\-help' to get a list, but be aware that some options may be settable only when another option has been set, and that advanced options may be hidden by some frontend programs. .PP .SH CONFIGURATION FILE The configuration file "canon_dr.conf" is used to tell the backend how to look for scanners, and provide options controlling the operation of the backend. This file is read each time the frontend asks the backend for a list of scanners, generally only when the frontend starts. If the configuration file is missing, the backend will use a set of compiled defaults, which are identical to the default configuration file shipped with SANE. .PP Scanners can be specified in the configuration file in 4 ways: .PP "scsi CANON" .RS Requests backend to search all scsi busses in the system for a device which reports itself to be a scanner made by 'CANON', with a model name starting with 'DR'. .RE .PP "scsi /dev/sg0" (or other scsi device file) .RS Requests backend to open the named scsi device. Only useful if you have multiple compatible scanners connected to your system, and need to specify one. Probably should not be used with the other "scsi" line above. .RE .PP "usb 0x04a9 0x1603" (or other vendor/product ids) .RS Requests backend to search all usb busses in the system for a device which uses that vendor and product id. The device will then be queried to determine if it is a Canon scanner. .RE .PP "usb /dev/usb/scanner0" (or other device file) .RS Some systems use a kernel driver to access usb scanners. This method is untested. .RE .PP The only configuration option supported is "buffer\-size=xxx", allowing you to set the number of bytes in the data buffer to something other than the compiled\-in default, 65536 (64K). Some users report that their scanner will "hang" mid\-page, or fail to transmit the image if the buffer is not large enough. .PP Note: This option may appear multiple times in the configuration file. It only applies to scanners discovered by 'scsi/usb' lines that follow this option. .PP Note: The backend does not place an upper bound on this value, as some users required it to be quite large. Values above the default are not recommended, and may crash your OS or lockup your scsi card driver. You have been warned. .PP .SH ENVIRONMENT The backend uses a single environment variable, SANE_DEBUG_CANON_DR, which enables debugging output to stderr. Valid values are: .PP .RS 5 Errors .br 10 Function trace .br 15 Function detail .br 20 Option commands .br 25 SCSI/USB trace .br 30 SCSI/USB detail .br 35 Useless noise .RE .SH KNOWN ISSUES This backend was entirely reverse engineered from usb traces of the proprietary driver. Various advanced features of the machines may not be enabled. No small machines or flatbed models have been tested. Their protocol is unknown. .SH CREDITS The various authors of the sane\-fujitsu backend provided useful code Corcaribe Tecnología C.A. www.cc.com.ve provided significant funding EvriChart, Inc. www.evrichart.com provided funding and equipment .SH "SEE ALSO" sane(7), sane\-scsi(5), sane\-usb(5), .SH AUTHOR m. allan noah: