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 Rut-
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(1) helps to find out the
correct device. Under Linux, such a device name could be /dev/usb/scan-
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, avail-
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 dsane-uson'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_DE-
BUG_CANON630U=12 scanimage > /dev/null
FILES
/etc/sane.d/canon630u.conf
The backend configuration file (see also description of
SANE_CONFIG_DIR below).
/usr/lib/x86_64-linux-gnu/sane/libsane-canon630u.a
The static library implementing this backend.
/usr/lib/x86_64-linux-gnu/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. On *NIX systems, the direc-
tories are separated by a colon (`:'), under OS/2, they are sep-
arated by a semi-colon (`;'). If this variable is not set, the
configuration file is searched in two default directories:
first, the current working directory (".") and then in
/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 directories. For
example, setting SANE_CONFIG_DIR to "/tmp/config:" would result
in directories tmp/config, ., and /etc/sane.d being searched (in
this order).
SANE_DEBUG_CANON630U
If the library was compiled with debug support enabled, this en-
vironment 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)
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