NAME
sane-umax_pp - SANE backend for Umax Astra parallel port flatbed
scanners
DESCRIPTION
The sane-umax_pp library implements a SANE (Scanner Access Now Easy)
backend that provides access to Umax parallel port flatbed scanners.
The following scanners work with this backend:
Model:
--------------------
Astra 610P
Astra 1220P
HP3200C
Astra 1600P
Astra 2000P
Genius ColorPage-Life Pro
This backend handles 75x75, 150x150, 300x300, 600x600 and 600x1200 for
1220P/1600P/2000P dpi scan reslutions,and 75x75, 150x150, 300x300 and
300x600 for 610P. In color and gray levels, there is a software lineart
mode.
The new generation models share a newer version of the 610P ASIC
embedded in an EPAT chip. Only parts such as CCD and ADC change from
one to another. They even all reports being UMAX Astra 1220P via
IEEE1284. There isn’t software way to recognize them properly. Under
windows, model is set by the driver installed, regardless of the
hardware.
EPP/ECP MODES ONLY
The current version of the backend uses only EPP or ECP mode to
communicate with the scanner. PS/2 mode isn’t implemented. The
610P only use SPP. It is recommended that you set your parallel
port to EPP in BIOS with the current version of this backend.
You can leave it to ECP or ECP+EPP, but in this case you may not
use ppdev but only direct hardware access if you have to use
ECP. ECPEPP will only work if you use a 2.4 or 2.6 kernel with
ppdev character device support.
This backend does support parport sharing only if you have a kernel
with ppdev support.
Note that if you don’t use the ppdev character device, the backend
needs to run as root. To allow user access to the scanner run the
backend through the network interface (See saned(8) and sane-net(5)).
A more relaxed solution (security wise) is to add suid bit to the
frontend (See chmod(1)). The backend drop root priviledges as soon as
it can, right after gaining direct access to IO ports, which lessen
risks when being root.
DEVICE NAMES
This backend expects device names of the form:
port value
Where value is :
auto autodetect all parallel ports and probe them for scanner
safe-auto
autodetect all parallel ports and probe them for scanner,
but does not try direct hardware access
/dev/ppi0
uses *BSD ppi device, depending on the number of
available parallel port, you have to use /dev/ppi1,
/dev/ppi2, ...
/dev/parport0
uses linux ppdev device, depending on the number of
available parallel port, you have to use /dev/parport1,
/dev/parport2, ...
0x378 does direct hardware access on the given address. Usual
values are 0x378, 0x278, 0x3BC In this case, you have to
run the scanner as root (*BSD and linux), or with
’IOPL=yes’ on OS/2
NOTE: in all cases, you must have sufficient priviledges to get access
to the chosen device or address. Depending on the security settings,
devices may not be available for all users. You have to change
permissions on the dev/ppi* or /dev/parport* devices.
You can rename any device using the
name devname
model model
vendor vendor
options. These options apply to the last port option.
CONFIGURATION
Please make sure to edit umax_pp.conf before you use the backend.
The contents of the umax_pp.conf file is a list of options and device
names that correspond to Umax scanners. Empty lines and lines starting
with a hash mark (#) are ignored.
The eight options supported are red-gain, green-gain, blue-gain,
red-offset, green-offset, blue-offset, astra, and buffer.
Options red-gain , green-gain and blue-gain allow you to adjust the
sensitivy of your scanner for the given color. Values range from 0
(lowest gain) to 15 (highest). If the advanced option "Gain" isn’t
checked in the frontend, the backend does automatic gain calibration,
and do not use user provided values.
Options red-offset , green-offset and blue-offset allow you to adjust
the offset of your scanner for the given color. Values range from 0
(lowest offset) to 15 (highest).
Option astra allows you to change the model of your scanner. Current
auto detection is based on side effects on scanning when using 1220P
command set on other models, so it may fail on unkown hardware
combination. Valid values are 610, 1220, 1600 and 2000. It is usefull
only when autodetection fails to detect properly your scanner model. If
your scanner work properly but is reported wrongly, let it be that way.
The only valid case to change the model is when your scanner produces
"black" or "inverted" scans. In this case you can put the model. Be
aware that it will prevent scanner model autodetection.
Option buffer allows you to change the size of the scan buffer. The
size must be specified in bytes. The default value is 2 megabytes.
Decreasing this value will improve the smoothness of progress bar in
the frontend, but will stall the scan more often.
FILES
/etc/sane.d/umax_pp.conf
The backend configuration file (see also description of
SANE_CONFIG_DIR below).
/usr/lib/sane/libsane-umax_pp.a
The static library implementing this backend.
/usr/lib/sane/libsane-umax_pp.so
The shared library implementing this backend (present on systems
that support dynamic loading).
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_UMAX_PP
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 reduce verbosity.
level debug output
------- ------------------------------
0 nothing
1 errors
2 warnings & minor errors
3 additional information
4 debug information
5 code flow (not supported yet)
6 special debug information
SANE_DEBUG_UMAX_PP_LOW
This variable sets the debug level for the SANE interface for
the Umax ASIC. Note that enabling this will spam your terminal
with some million lines of debug output.
level debug output
------- -------------------------------
0 nothing
1 errors
8 command blocks
16 detailed code flow
32 dump datafiles
255 everything
SEE ALSO
sane(7), sane-net(5), saned(8)
For latest bug fixes and information see
http://umax1220p.sourceforge.net/
AUTHOR
Stéphane Voltz <stef.dev@free.fr>
CREDITS
Support for the 610P has been made possible thank to an hardware
donation by William Stuart.
BUG REPORTS
If something doesn’t work, please contact me. But I need some
information about your scanner to be able to help you...
SANE version
run "scanimage -V" to determine this
the backend version and your scanner hardware
run "SANE_DEBUG_UMAX_PP=255 scanimage -L 2>log" as root. If you
don’t get any output from the umax_pp backend, make sure a line
"umax_pp" is included into your /etc/sane.d/dll.conf. If your
scanner isn’t detected, make sure you’ve defined the right port
address, or the correct device in your umax_pp.conf.
the name of your scanner/vendor
also a worthy information. Please also include the optical
resolution and lamp type of your scanner, both can be found in
the manual of your scanner.
any further comments
if you have comments about the documentation (what could be done
better), or you think I should know something, please include
it.
14 Jul 2008 sane-umax_pp(5)