Re: [Itifg-tech] need help configure shutter

[<M....@go...>]

Hello Shashi,

"Shashidhara.Marathe" <sh...@gi...> wrote on 30.04.2008 12:37:05:

> Dear M.Stein,
>
> "Fourc" is the Software( actually it is called SPEC, X-Ray
> Diffraction and Data Acquisition software and FOURC is four-circle
> diffractometer configuration ) used to execute the macros which
> control the CCD. I asked about the 'busy timers' problem with the
> SPEC support team and they have sent me following answer,
>
>
>
> " All I can tell you about the above error message is that when
> operating in "read" mode (vs. "memory-mapped" mode), the image_par(0,
> "run") leads to the following calls to the driver:
>
> 1) an ioctl() with GIOC_CR_SET_STOP

this is in itifgIoctl.c

> 2) a read()

this is in itifgMain.c. I think line 1003 is a hot canidate.

> You can see that those are the calls being made to the driver with
> DEBUG = 128.

Yes, this is what I ask You before. If You remove the normal driver
with 'rmmod itifg' and insert the debugging one with 'insmod ./itifg_g.o'
You can see more debugging output in /var/log/messages.

> The error message you report is due to the read() system call to the
> driver returning an error. You have to look at the driver to find out
> why there is an EBUSY error.

The comment above line 1003 says, that the last operation hasn't finished
yet, perhaps You (or the shutter) are to fast/slow/unsynchronized?

> (Note, you can do a "man errno" or look in /usr/include/asm/errno.h or
> other errno.h files to find what symbolic error is associated with a
> particular message, then you can look for that symbolic error in the
> driver source files.)
>
> Would it make any sense to use memory-mapped mode? (See the pcdig
> help file for details.) "

I think this don't fix the error, it makes it only more difficult to
find.

> Accoding to his answer i should look for driver source file?which
> driver source files i should look for?

See above and let us again try to load the debugging module!

I'm back at Monday, we have a spare day here.

                                                matthias

> Please let me know.
>
>
> Thank you,
> shashi
>
>
> Mr.Shashidhara Marathe
> Ph.D student
> #311,Dept. of Materials Science and Engg.
> Gwangju Institute of Science and Tech.
> 1-oryong-Dong, Buk-Gu, Gwnagju- 500712
> South Korea
> Cell: 010-4619-0231
> PH : +82-62-970-2352
> FAX: +82-62-970-2304
_________________________________________________
Matthias Stein,
GOM Gesellschaft fuer Optische Messtechnik mbH,
Mittelweg 7-8, 38106 Braunschweig, Germany
E-mail: M....@go..., Internet: http://www.gom.com
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