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


       sane-hp - SANE backend for HP ScanJet scanners


       The sane-hp library implements a SANE (Scanner Access Now Easy) backend
       that provides access to HP ScanJet scanners which support SCL  (Scanner
       Control  Language  by HP).  The following scanners are known positively
       to work with this backend:

              Model:         Product id:     Interface:
              ----------     -----------     ----------
              ScanJet Plus   C9195A          HP Parallel Interface Card
              ScanJet IIc    C1750A 3226     SCSI
              ScanJet IIcx   C2500A 3332     SCSI
              ScanJet IIp    C1790A          SCSI
              ScanJet 3C     C2520A 3503     SCSI
              ScanJet 3P     C2570A 3406     SCSI
              ScanJet 4C     C2520A          SCSI
              ScanJet 4P     C1130A 3540     SCSI
              ScanJet 4100C  C6290A          USB
              ScanJet 5P     C5110A          SCSI
              ScanJet 5100C  C5190A          parallel port
              ScanJet 5200C  C7190A 3846     parallel port/USB
              ScanJet 6100C  C2520A 3644     SCSI
              ScanJet 6200C  C6270A 3828     SCSI/USB
              ScanJet 6250C  C6270A 3828     SCSI/USB
              ScanJet 6300C  C7670A          SCSI/USB
              ScanJet 6350C  C7670A          SCSI/USB
              ScanJet 6390C  C7670A          SCSI/USB
              PhotoSmart     C5100A R029,R030,R032    SCSI

       Support for models 5100C/5200C connected to the parallel port  requires
       the  ppSCSI  driver  available  at
       scsi.html and

       Support for models 5200C/62X0C/63X0C connected to USB requires  libusb.
       See sane-usb(5) for more details.

       The sane-hp backend no longer supports OfficeJet multi-function periph-
       erals.  For these devices use the external "hplip"  packages  available
       at:  For in-
       formation about the  previous  hpoj  driver,  see:  http://hpoj.source-

       Because  Hewlett-Packard  does  no longer produce scanners that support
       SCL (beside the OfficeJets), the above list of  supported  scanners  is
       complete.   Other HP scanners are not supported by the sane-hp backend,
       but     might     be     supported     by     another     one.      See   You can also watch the sane-devel mail-
       ing list at

       More details about  the  hp  backend  can  be  found  on  its  homepage


       This backend expects device names of the form:


       Where special is the UNIX path-name for the special device that  corre-
       sponds  to the scanner.  For SCSI scanners the special device name must
       be a generic SCSI device or a symlink to such a device.   Under  Linux,
       such  a  device name could be /dev/sga or /dev/sg2, for example. If the
       special device name contains "usb", "uscanner" or "ugen", it is assumed
       that the scanner is connected by USB.  For the HP ScanJet Plus the spe-
       cial device name must be the device that corresponds  to  the  parallel
       interface  card that was shipped with the scanner. That is /dev/hpscan.
       A   special    driver    is    required    for    this    card.     See for details. If the link does
       not work, try


       The contents of the hp.conf file is a list of options and device  names
       that correspond to HP ScanJet scanners.  Empty lines and lines starting
       with a hash mark (#) are ignored. See sane-scsi(5) and  sane-usb(5)  on
       details of what constitutes a valid device name.

       Options  specified  in  front  of the first line that contains a device
       name are defaults for all devices. Options specified below a line  that
       contains  a  device  name apply just to the most recently mentioned de-

       Supported  options   are   connect-scsi,   connect-device,   enable-im-
       age-buffering, and dumb-read.

       Option connect-scsi specifies that the scanner is connected to the sys-
       tem by SCSI.  Input/output is performed using  SCSI-commands.  This  is
       the  default.   But if your SCSI device name contains "usb", "uscanner"
       or "ugen", option connect-scsi must be specified. Otherwise it  is  as-
       sumed that the scanner is connected by USB.

       Option  connect-device  specifies  that the scanner is connected to the
       system  by   a   special   device.   Input/output   is   performed   by
       read()/write()-operations  on  the device. This option must be used for
       HP ScanJet Plus or scanners connected to USB which are accessed through
       a  named  device (e.g.  /dev/usb/scanner0).  For device names that con-
       tain "usb", "uscanner" or "ugen", it is not necessary to specify option

       Option enable-image-buffering stores the scanned image in memory before
       passing it to the frontend. Could be used in case  of  forward/backward
       moving scanner lamp.

       Option dumb-read can be used to work around problems with "Error during
       device I/O". These problems may occur with certain SCSI-to-USB convert-
       ers or Buslogic SCSI cards.  The option should not be used for SCSI de-
       vices which are working correctly.  Otherwise startup of frontends  and
       changing parameters might be slower.

       A sample configuration file is shown below:

              # this is a comment
              option connect-device

       /dev/scanner is typically a symlink to the actual SCSI scanner device.


              The   backend   configuration  file  (see  also  description  of
              SANE_CONFIG_DIR below).

              The static library implementing this backend.

              The shared library implementing this backend (present on systems
              that support dynamic loading).

              Calibration  data  for  HP  PhotoSmart  PhotoScanner that is re-
              trieved from the scanner after calibration. The data is uploaded
              to  the  scanner  at start of the backend if it is in media mode
              'print media' or if the media mode is changed to 'print media'.


              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 /usr/lo-
              cal/etc/sane.d.  If the value of the environment  variable  ends
              with  the directory separator character, then the default direc-
              tories are searched after the explicitly specified  directories.
              For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
              sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
              ing searched (in this order).

              If the library was compiled with debug support enabled, this en-
              vironment variable controls the debug level  for  this  backend.
              E.g.,  a  value  of 128 requests all debug output to be printed.
              Smaller levels reduce verbosity.

              Only used for OS/2 and along with use of  HP  PhotoSmart  Photo-
              Scanner.  Must be set to the directory where the directory .sane
              is located. Is used to save and read the calibration file.



              For each type of  connection  (connect-scsi,  connect-usb,  con-
              nect-device) it can be specified if the connection to the device
              should be kept open ("1") or not ("0").  Usually the connections
              are  closed after an operation is performed.  Keeping connection
              open to SCSI-devices can result in errors during device IO  when
              the  scanner  has  not been used for some time. By default, USB-
              connections are kept open. Other connections are closed.

              Specifies number of retries for read operation before  returning
              an  EOF  error.  Only supported for non-SCSI devices. Default: 1
              retry. Time between retries is 0.1 seconds.


       HP PhotoSmart PhotoScanner
              In media mode  'slide'  and  'negative',  scan  resolutions  are
              rounded  to  multiple of 300 dpi. The scanner does not scale the
              data correctly on other resolutions. Some newer models (firmware
              code  R030  and later) do not support adjustment of contrast/in-
              tensity level and tone map.  The backend will simulate  this  by
              software, but only for gray and 24 bit color.

       Automatic Document Feeder (ADF)
              For  use of the ADF with xscanimage(1), first place paper in the
              ADF and then change option scan source to 'ADF'.  Press  'change
              document'  to  load  a sheet. Then press 'scan' to start a scan.
              Maybe it is sufficient to press 'scan' without 'change document'
              for  repeated scans. The use of the preview window is not recom-
              mended when working with the ADF.  Setting a window to scan from
              ADF is not supported with xscanimage(1).  Try xsane(1).

       Immediate actions
              Some  actions in xscanimage(1) (i.e. unload, select media, cali-
              brate) have an immediate effect on the scanner without  starting
              a scan.  These options can not be used with scanimage(1).


       HP PhotoSmart PhotoScanner
              PhotoScanners with firmware release R030 and up have no firmware
              support for  contrast/brightness/gamma  table.  In  the  current
              backend  this is simulated by software on 24 bits data.  Simula-
              tion on 30 bits should give better results.

       Data widths greater than 8 bits
              Custom gamma table does not work.

       Parallel scanner support
              Beside the ScanJet Plus which came with its own parallel  inter-
              face  card,  currently  only the HP ScanJet 5100C/5200C are sup-
              ported.  These scanners are using an  internal  parallel-to-SCSI
              converter which is supported by the ppSCSI-driver (see above).


       sane(7), sane-scsi(5), sane-usb(5) scanimage(1), xscanimage(1), scanim-


       The sane-hp backend was written by Geoffrey T. Dairiki.
       HP PhotoSmart PhotoScanner support by Peter Kirchgessner.

                                  13 Jul 2008                       sane-hp(5)

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