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

NAME

       sane-cardscan - SANE backend for Corex CardScan usb scanners

DESCRIPTION

       The  sane-cardscan  library  implements	a  SANE  (Scanner Access Now Easy) backend which provides access to the Corex CardScan 800c & 600c
       small-format scanners.

       The backend supports only grayscale and color modes and media of (theoretically) infinite length.

       This backend may support other scanners. The best way to determine level of support is to get a trace of the windows driver in action,  and
       send it to the author.

OPTIONS

       The cardscan backend supports the following options:

       mode m
	      Selects the mode for the scan. Options are "Gray" and "Color".

CONFIGURATION FILE

       The  configuration file "cardscan.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.

       Scanners can be specified in the configuration file in 2 ways:

       "usb 0x04c5 0x1042" (or other vendor/product ids)
	      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 cardscan scanner.

       "usb /dev/usb/scanner0" (or other device file)
	      Some systems use a kernel driver to access usb scanners. This method is untested.

       Additionally, there are two configuration options that control the protocol used by the backend:

       "lines_per_block 16" (or other number from 1 to 32)
	      Controls	the  number of lines of image data which will be aquired in each pass.	Older scanners will require this number set lower,
	      often 1.

       "has_cal_buffer 1" (1 or 0)
	      Causes the backend to get calibration data from scanner during initialization.  Older scanners do not support this request, and must
	      be set to 0.

ENVIRONMENT

       The backend uses a single environment variable, SANE_DEBUG_CARDSCAN, which enables debugging output to stderr. Valid values are:

	      5  Errors
	      10 Function trace
	      15 Function detail
	      20 Option commands
	      25 SCSI/USB trace
	      30 SCSI/USB detail
	      35 Useless noise

KNOWN ISSUES

	      The  scanner  does  not seem to have much control possible, so the backend cannot set x/y coordinate values, resolutions, etc. These
	      things could be simulated in the backend, but there are plenty of command line tools.
	      The backend also does not send all the commands that the windows driver does, so it may not function the same.
	      The backend does not have the calibration or ejection options of the windows driver.

CREDITS

       The hardware to build this driver was provided to the author by:
	 Jeff Kowalczyk <jtk a t yahoo d o t com>

SEE ALSO

       sane(7), sane-usb(5)

AUTHOR

       m. allan noah: <kitno455 a t gmail d o t com>

								    10 Feb 2010 						  sane-cardscan(5)