[sane-devel] RS232 Scanner

[Dan Scott]

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"
>