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 Rutman
<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/scanner0 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, available 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¶
- /etc/sane.d/canon630u.conf
- The backend configuration file (see also description of
SANE_CONFIG_DIR below).
- /usr/lib/arch_triplet/sane/libsane-canon630u.a
- The static library implementing this backend.
- /usr/lib/arch_triplet/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 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 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