1sane-gt68xx(5)           SANE Scanner Access Now Easy           sane-gt68xx(5)
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NAME

6       sane-gt68xx - SANE backend for GT-68XX based USB flatbed scanners
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DESCRIPTION

9       The  sane-gt68xx  library  implements  a SANE (Scanner Access Now Easy)
10       backend that provides access to  USB  flatbed  scanners  based  on  the
11       Grandtech  GT-6801 and GT-6816 chips.  A list of supported scanners can
12       be      found      on      the      gt68xx      backend       homepage:
13       http://www.meier-geinitz.de/sane/gt68xx-backend/.
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15       This is BETA software. Especially if you test new or untested scanners,
16       keep your hand at the scanner's plug and unplug it, if the  head  bumps
17       at the end of the scan area.
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19       If  you own a scanner other than the ones listed on the gt68xx homepage
20       that works with this backend, please let me know this  by  sending  the
21       scanner's exact model name and the USB vendor and device ids (e.g. from
22       sane-find-scanner or syslog) to me. Even if the scanner's name is  only
23       slightly  different from the models already listed as supported, please
24       let me know.
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26       If you own a scanner that isn't detected by the gt68xx backend but  has
27       a  GT-6801  or  GT-6816  chipset, you can try to add it to the backend.
28       Have     a     look      at      the      following      web      page:
29       http://www.meier-geinitz.de/sane/gt68xx-backend/adding.html
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LIBUSB ISSUES

32       Please  use  libusb-0.1.8 or later. Without libusb or with older libusb
33       versions all kinds of trouble can be expected. The  scanner  should  be
34       found by sane-find-scanner without further actions. For setting permis‐
35       sions and general USB information looks at sane-usb(5).
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FIRMWARE FILE

38       You need a firmware file for your scanner. That's a small file contain‐
39       ing  software  that will be uploaded to the scanner's memory. It's usu‐
40       ally named *.usb, e.g.  PS1fw.usb.  It comes  on  the  installation  CD
41       that  was provided by the manufacturer, but it may be packaged together
42       with the installation program in an .exe file. For Mustek scanners, the
43       file  can  be  downloaded  from  the gt68xx backend homepage. For other
44       scanners, check the CD for .usb files. If you only  find  *.cab  files,
45       try  cabextract  to  unpack. If everything else fails, you must install
46       the Windows driver and get the firmware from there (usually in the win‐
47       dows/system  or  system32  directories).  Put  that  firmware file into
48       /usr/share/sane/gt68xx/.  Make sure that it's readable by everyone.
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CONFIGURATION

52       The contents of the gt68xx.conf file is a list of usb lines  containing
53       vendor  and  product  ids that correspond to USB scanners. The file can
54       also contain option lines.  Empty lines and lines starting with a  hash
55       mark  (#)  are ignored.  The scanners are autodetected by usb vendor_id
56       product_id statements which  are  already  included  into  gt68xx.conf.
57       "vendor_id"  and "product_id" are hexadecimal numbers that identify the
58       scanner.
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60       The override, firmware, vendor, model, and afe options must  be  placed
61       after the usb line they refer to.
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63       Option  override  is  used  to  override  the default model parameters.
64       That's necessary for some scanners that use the same vendor/product ids
65       but  are  different. For these scanners there are already commented out
66       override lines in  the  configuration  file.   override  mustek-scanex‐
67       press-1200-ub-plus  is  necessary  for  the  Mustek Scanexpress 1200 UB
68       Plus, the Medion/Lifetec/Tevion LT 9452, and the Trust Compact Scan USB
69       19200.   override  artec-ultima-2000 is used for the Artec Ultima 2000,
70       the Boeder SmartScan Slim Edition, the Medion/ Lifetec/ Tevion/  Cytron
71       MD/LT  9385,  the  Medion/  Lifetec/ Tevion MD 9458, and the Trust Flat
72       Scan USB 19200.  override mustek-bearpaw-2400-cu is necessary  for  the
73       Mustek  BearPaw  2400  CU  and the Fujitsu 1200CUS. The override option
74       must be the first one after the usb line.
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76       Option firmware selects the name and path of the  firmware  file.  It's
77       only  necessary  if the default (or override) doesn't work. The default
78       firmware directory is /usr/share/sane/gt68xx/.  You may need to  create
79       this  directory. If you want to place the firmware files at a different
80       path, use a firmware line.
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82       The vendor and model options are not absolutely necessary but for  con‐
83       venience.  Quite  a  lot of scanners from different manufacturers share
84       the same vendor/product ids so you can set the "correct" name here.
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86       The afe option allows one to set custom offset and gain values for  the
87       Analog  FrontEnd  of  the  scanner.  This  option can be either used to
88       select the AFE values if automatic coarse calibration is  disabled,  or
89       to  make  automatic  coarse  calibration  faster. For the latter usage,
90       enable debug level 3 (see below), scan an image and look for debug line
91       string  with  "afe". Copy this line to gt68xx.conf.  The option has six
92       parameters: red offset, red gain, green offset, green gain,  blue  off‐
93       set, and blue gain.
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95       A sample configuration file is shown below:
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97              usb 0x05d8 0x4002
98              override "mustek-scanexpress-1200-ub-plus"
99              firmware "/opt/gt68xx/SBfw.usb"
100              vendor "Trust"
101              model "Compact Scan USB 19200"
102              afe 0x20 0x02 0x22 0x03 0x1f 0x04
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FILES

106       /etc/sane.d/gt68xx.conf
107              The   backend   configuration  file  (see  also  description  of
108              SANE_CONFIG_DIR below).
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110       /usr/lib64/sane/libsane-gt68xx.a
111              The static library implementing this backend.
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113       /usr/lib64/sane/libsane-gt68xx.so
114              The shared library implementing this backend (present on systems
115              that support dynamic loading).
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ENVIRONMENT

118       SANE_CONFIG_DIR
119              This environment variable specifies the list of directories that
120              may contain the configuration file.  Under UNIX, the directories
121              are  separated  by a colon (`:'), under OS/2, they are separated
122              by a semi-colon (`;').  If this variable is not set, the config‐
123              uration  file is searched in two default directories: first, the
124              current working directory (".") and then in /etc/sane.d.  If the
125              value  of the environment variable ends with the directory sepa‐
126              rator character, then the default directories are searched after
127              the  explicitly  specified  directories.   For  example, setting
128              SANE_CONFIG_DIR to "/tmp/config:" would  result  in  directories
129              "tmp/config",  ".",  and  "/etc/sane.d"  being searched (in this
130              order).
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132       SANE_DEBUG_GT68XX
133              If the library was compiled with  debug  support  enabled,  this
134              environment  variable controls the debug level for this backend.
135              Higher debug levels increase the verbosity of the output. If the
136              debug  level  is  set  to 1 or higher, some debug options become
137              available that are normally hidden. Handle them with care.
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139              Example: export SANE_DEBUG_GT68XX=4
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SEE ALSO

143       sane(7),    sane-usb(5),    sane-artec_eplus48u(5)     sane-plustek(5),
144       sane-ma1509(5), sane-mustek_usb(5), sane-mustek(5), sane-mustek_pp(5)
145       /usr/share/doc/sane-backends/gt68xx/gt68xx.CHANGES
146       http://www.meier-geinitz.de/sane/gt68xx
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AUTHOR

150       Henning Meier-Geinitz <henning@meier-geinitz.de>
151       The  original  gt68xx  driver  was  written  by  Sergey Vlasov, Andreas
152       Nowack, and David Stevenson. Thanks for sending patches  and  answering
153       questions to them and all the other contributors.
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BUGS

157       The first few lines of the image are garbage for the 2400 TA Plus.
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159       Interpolation  should be used instead of just copying data, when the X-
160       and Y-resolution differ.
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162       Support for buttons is missing.
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164       More detailed bug information is available at the gt68xx backend  home‐
165       page  http://www.meier-geinitz.de/sane/gt68xx-backend/.  Please contact
166       us    if     you     find     a     bug     or     missing     feature:
167       <sane-devel@lists.alioth.debian.org>.  Please  send a debug log if your
168       scanner isn't detected correctly (see SANE_DEBUG_GT68XX above).
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172                                  13 Jul 2008                   sane-gt68xx(5)
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