sane-hp - SANE backend for HP ScanJet scanners
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
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 http://cyberelk.net/tim/parport/ppscsi.html
Support for models 5200C/62X0C/63X0C connected to the USB require the kernel
scanner driver or libusb. See sane-usb
(5) for more details.
The "hp" backend no longer supports OfficeJet multi-function
peripherals. For these devices use the external "hpoj" backend in
version 0.90 and later of the "HP OfficeJet Linux driver", available
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 "hp" backend, but might be
supported by another one. See http://www.sane-project.org/
. You can
also watch the sane-devel mailing list at
More details about the hp backend can be found on its homepage
This backend expects device names of the form:
is the UNIX path-name for the special device that
corresponds 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
, 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 special device name must be the device that corresponds to
the parallel interface card that was shipped with the scanner. That is
. A special driver is required for this card. See
ftp://rvs.ctrl-c.liu.se/pub/wingel/hpscan for details. If the link does not
work, try ftp://sunsite.unc.edu/pub/Linux/kernel/patches/scanners.
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
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 device.
Supported options are connect-scsi
, and dumb-read
specifies that the scanner is connected to the system
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
assumed that the scanner is connected by USB.
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 contain
"usb", "uscanner" or "ugen", it is not necessary
to specify option connect-device.
stores the scanned image in memory before
passing it to the frontend. Could be used in case of forward/backward moving
can be used to work around problems with "Error
during device I/O". These problems may occur with certain SCSI-to-USB
converters or Buslogic SCSI cards. The option should not be used for SCSI
devices 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
/dev/scanner is typically a symlink to the actual SCSI scanner device.
- The backend configuration file (see also description of
- 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
retrieved 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. 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).
- If the library was compiled with debug support enabled,
this environment variable controls the debug level for this backend. E.g.,
a value of 128 requests all debug output to be printed. Smaller levels
- Only used for OS/2 and along with use of HP PhotoSmart
PhotoScanner. 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,
connect-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/intensity level and tone map.
The backend will simulate this by software, but only for gray and 24 bit
- 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 recommended 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,
calibrate) have an immediate effect on the scanner without starting a
scan. These options can not be used with scanimage.
- 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. Simulation 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
interface card, currently only the HP ScanJet 5100C/5200C are supported.
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)
The sane-hp backend was written by Geoffrey T. Dairiki. HP PhotoSmart
PhotoScanner support by Peter Kirchgessner.