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sane-umax_pp(5) |
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sane−umax_pp − SANE backend for Umax Astra parallel port flatbed scanners
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
This backend handles 75x75, 150x150, 300x300, 600x600 and 600x1200 dpi scan resolutions, in color and gray levels. There is a software lineart mode.
These scanners
share the same ASIC. 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 and SPP mode aren’t implemented. 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(1) 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.
This backend expects device names of the form:
port value
Where value is :
value
description.br
−−−−−−−−−−−−−
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
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.
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 height options supported are red−brightness, green−brightness, blue−brightness, red−contrast, green−contrast, blue−contrast, astra, and buffer.
Options red−brightness , green−brightness and blue−brightness allow you to adjust the sensitivy of your scanner for the given color. Values range from 0 (lowest brightness) to 15 (highest). If the advanced option "Brightness" isn’t checked in the frontend, the backend does automatic brightness calibration, and do not use user provided values.
Options red−contrast , green−contrast and blue−contrast allow you to adjust the contrast of your scanner for the given color. Values range from 0 (lowest contrast) 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 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.
/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).
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
sane(7),
sane−net(5), saned(1)
For latest bug fixes and information see
http://umax1220p.sourceforge.net/
Stéphane VOLTZ <svoltz@wanadoo.fr>
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.
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