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# sane-canon630u.5

    sane-canon630u(5)        SANE Scanner Access Now Easy        sane-canon630u(5)

## NAME

           sane-canon630u - SANE backend for the Canon 630u USB flatbed scanner

## DESCRIPTION

           The  sane-canon630u library implements a SANE (Scanner Access Now Easy)
           backend that provides access to the following Canon flatbed scanners:

                  CanoScan 630u
                  CanoScan 636u

           Color scanning is supported at 75, 150, 300, and 600 dpi, and gamma and
           analog gain are adjustable.

           TESTERS  ARE WELCOME. Send your bug reports and comments to Nathan Rutâ
           man <nthn1@yahoo.com>

## CONFIGURATION

           The contents of the canon630u.conf file is a list of device names  that
           correspond  to Canon USB scanners.  Empty lines and lines starting with
           a hash mark (#) are ignored.  Only one device name  can  be  listed  in
           canon630u.conf.   The  program  sane-find-scanner helps to find out the
           correct device. Under Linux, such a device name could be /dev/usb/scanâ
           ner0 for example.  See sane-usb(5) for details.

           This  product-specific  scanner  driver uses the lower-level kernel USB
           driver    "scanner".     Check    for     "Driver=usbscanner"     under
           /proc/bus/usb/devices.  If "Driver=(none)", try forcing it with "insmod
           scanner vendor=0x04a9 product=0x2204"

## NOTES

           Due to Canon's unwillingness to  provide  scanner  documentation,  this
           software was developed by analyzing the USB traffic of the Windows 2000
           driver.  So things like the calibration procedure I kind of made up; it
           seems to work for my scanner.  If you have complaints, let me know.

           This  driver  requires the ability to send USB Control Messages, availâ
           able in kernel 2.4.12 or later.

           Some users have reported that this driver doesn't work  at  all.   This
           seems  to  be  a  hardware  specific  issue, although I don't know what
           exactly the problem is.  If you are having problems, please send me the
           info  in  /proc/bus/usb/devices, /proc/pci, the kernel scanner.c driver
           version    from    /var/log/messages,    and    the     output     from
           "SANE_DEBUG_CANON630U=12 scanimage > /dev/null"

## FILES

           /usr/local/etc/sane.d/canon630u.conf
                  The   backend   configuration  file  (see  also  description  of
                  SANE_CONFIG_DIR below).

           /usr/local/lib/sane/libsane-canon630u.a
                  The static library implementing this backend.

           /usr/local/lib/sane/libsane-canon630u.so
                  The shared library implementing this backend (present on systems
                  that support dynamic loading).

           /tmp/canon.cal
                  The  calibration  file used to normalize pixel brightness.  This
                  is calculated every time the scanner is first used after it  has
                  lost power.  Deleting this file will force recalibration.

## ENVIRONMENT

           SANE_CONFIG_DIR
                  This environment variable specifies the list of directories that
                  may contain the configuration file.  Under UNIX, the directories
                  are  separated  by a colon (`:'), under OS/2, they are separated
                  by a semi-colon (`;').  If this variable is not set, the configâ
                  uration  file is searched in two default directories: first, the
                  current    working    directory    (".")     and     then     in
                  /usr/local/etc/sane.d.  If the value of the environment variable
                  ends with the directory separator character,  then  the  default
                  directories are searched after the explicitly specified directoâ
                  ries.  For example, setting  SANE_CONFIG_DIR  to  "/tmp/config:"
                  would    result    in   directories   "tmp/config",   ".",   and
                  "/usr/local/etc/sane.d" being searched (in this order).

           SANE_DEBUG_CANON630U
                  If the library was compiled with  debug  support  enabled,  this
                  environment  variable controls the debug level for this backend.
                  Higher debug levels increase the verbosity of the output.

                  Example:
                  SANE_DEBUG_CANON630U=12 scanimage > /dev/null

## SEE ALSO

           sane(7), sane-usb(5), sane-find-scanner(1)
           http://canon-fb630u.sourceforge.net/

## AUTHOR

           Nathan Rutman

                                      11 Jul 2008                sane-canon630u(5)