[sane-devel] RS232 Scanner

[m. allan noah]

but is this diag software output post-processed by the pc? if you have
logs of the data in flight, and there is no image, then you dont need
sane, you need a standalone app.

allan

On 7/30/08, Dan Scott <danieljamesscott at gmail.com> wrote:
> Hi,
>
>  I think it's a bit simpler than that. The diagnostic software shows an
>  "array" showing the marked boxes. Here's what I get form the
>  diagnostic software when I scan a slip:
>
>  Please select:
>  Ticket count: 1
>  ticket data len=52
>  <..> 1 2 3 4 5 6 7 8 9 0 A B C D <..> 1 2 3 4 5 6 7 8 9 0 A B C D
>  < 1> * * * . . . . . * . * * . <21> . . . . . . . . . . . . .
>  < 2> . . . . . . . . . . . . . <22> . . . . . . . . . . . . .
>  < 3> . * . . . . . . . . . . . <23> . . . . . . . . . . . . .
>  < 4> . . . . . . . . . . . . . <24> . . . . . . . . . . . . .
>  < 5> . . . . . . . . . . . . . <25> . . . . . . . . . . . . .
>  < 6> . . . . . . . . . . . . . <26> . . . . . . . . . . . . .
>  < 7> . . . . . . . . . . . . .
>  < 8> . . . . . . . . . . . . .
>  < 9> . . . . . . . . . . . . .
>  <10> . . . . . . . . . . . . .
>  <11> . . . . . . . . . . . . .
>  <12> . . . . . . . . . . . . .
>  <13> . . . . . . . . . . . . .
>  <14> . . . . . . . . . . . . .
>  <15> . . . . . . . . . . . . .
>  <16> . . . . . . . . . . . . .
>  <17> . . . . . . . . . . . . .
>  <18> . . . . . . . . . . . . .
>  <19> . . . . . . . . . . . . .
>  <20> . . . . . . . . . . . . .
>
>  So I only have to worry about getting this data - not downloading an
>  image and then extracting the mark information.
>
>  Thanks,
>
>  Dan
>
>  2008/7/30 m. allan noah <kitno455 at gmail.com>:
>
> > i have quite a bit of omr experience, and have done a bit with rs232
>  > in the past, but never scanners. do your logs show the actual data
>  > being passed? if so, i think your first effort should be to extract
>  > image from logs.
>  >
>  > allan
>  >
>  > On 7/30/08, Dan Scott <danieljamesscott at gmail.com> wrote:
>  >> Hi,
>  >>
>  >>  I'm working on getting a RS232 scanner working on Linux. I see that
>  >>  Sane has some support for serial port scanners but not much. The
>  >>  scanner is attached to a POS system for retail sales and runs RHEL5.
>  >>
>  >>  Unfortunately, I have no documentation for the scanner, I'm not even
>  >>  sure of the brand. There's a logo on the front which is 'G' followed
>  >>  by a globe symbol, followed by 'T' so it could be 'GOT' or 'GT'. There
>  >>  does not appear to be a model number although there is an
>  >>  identification place which is written in Chinese.
>  >>
>  >>  I have a compiled diagnostic application (no source code) which can
>  >>  control the scanner and I have tried logging the system calls using
>  >>  the 'ltrace' command, so that I can figure out the protocol. I have
>  >>  tried writing a program to mimic the diagnostic application which
>  >>  sends the same commands to the serial port but the scanner does not
>  >>  respond.
>  >>
>  >>  Does anyone have any expertise in RS232 scanner protocols? All my
>  >>  searching on the web reveals results for barcode scanners which appear
>  >>  to work very differently from image scanners.
>  >>
>  >>  As a final note, I am trying to use the scanner for OMR - the
>  >>  diagnostic application returns an array of data relating to the marks
>  >>  entered on a slip of paper - if that is any use. Also, I can attach
>  >>  the log file of system calls made by the diagnostic application if
>  >>  that will help anyone.
>  >>
>  >>  Any help would be greatly appreciated.
>  >>
>  >>  Thanks,
>  >>
>  >>  Dan Scott
>  >>
>  >>
>  >>  --
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>  >
>  >
>  > --
>  > "The truth is an offense, but not a sin"
>  >
>


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"The truth is an offense, but not a sin"