[Itifg-tech] Camera readout using itifg 8.4

[Tim v. W. <T.I...@ph...>]

Hi again Mattias,

I'm trying to get a camera (dalsa cad6 256x256) to run with the itifg  
driver. It works with the test_itifg routine supplied with the driver  
after you helped my figure out how to tell the driver to use a  
specific .exo file (thanks again). I'm now trying to write my own  
routine which reads out the camera such that I can incorporate it in  
my program. There are however a few things that I have some difficulty  
finding out, and I hoped that you could help me. I've looked through  
the documentation supplied with itifg 8.4.0 (which is the version I'm  
using), but this seems rather old, and browsing through the changelog  
is unclear at best.

The things I'm trying to find out are:
  - What is the normal mode of operation to get a camera to run,  
specifically the (fast) mmap mode? What ioctl calls are needed in what  
order?
  - What is the difference between the /dev/ic0??? descriptors? when  
are they used?
  - How do I start and stop the framegrabber? The changelog mentions  
lseek() ('ioctls STRT/STOP replaced by one lseek interface'), where  
and how can I use that with itifg?
  - What do the various parameters in the .cam files mean?
  - Are all camera specific settings in the .cam files or do I need to  
do some things myself? I.e.: do certain cameras require a different  
mode of operation, or is this all the same for all cameras?

And more specifically:
  - How do I find out the module that I need to use with  
iti_read_config() (fourth argument)? I currently use 48, but I don't  
know why (this is what itifg_test uses).

If I overlooked certain documentation, please tell me. Also, if these  
questions are too general for the itifg driver, let me know. However I  
could not find the answer to these questions (easily). An alternative  
would be to take your test code and cut out the parts I need, but  
that's a rather hacky approach in which case I wouldn't fully  
understand what I would be doing.

Thanks in advance,

Tim van Werkhoven