Hey, 

for anyones interest. I found a nice program called gumsnap.c from Scott Ellis which lets you adjust exposure among other options, takes a snapshot and saves it as jpeg. It needs opencv to be installed though. As that's the case on my gumstix I could build it right away and test it. It's a great help for me and also a good start on how to control the camera from a c-File.

Here the link...
https://github.com/scottellis/gumsnap

Mark

On Feb 24, 2012, at 5:44 PM, bart wrote:

Hi Mark,

Take a look at this page: http://v4l2spec.bytesex.org/spec/x542.htm
At the bottom you can find a nice example.

Bart

On Fri, Feb 24, 2012 at 5:00 PM, mark stamer [via Gumstix] <[hidden email]> wrote:
Hello,

I just started working with the Caspa camera and already got stuck with changing the exposure time to a fixed value. Am I right that this is simply not implemented in the MT9V032 driver? At least modinfo doesn't show a parameter in that sense.

Can anyone give me a little hint on how to start in order to set exposure times on the Caspa camera and capture images from a c program?

Mark
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Dipl.-Ing. Mark Stamer
Technische Universität Hamburg-Harburg
Institut für Mikrosystemtechnik (E-7)
Eißendorfer Str. 42
21073 Hamburg
Germany

Tel.: +49 (0)40 42878 2402
Fax: +49 (0)40 42878 2396
Email: mark.stamer@tuhh.de
http://www.tu-harburg.de/mst