2010-07-21 17:00:26 BF548 & OV9655 - Light Problems
Dusko Cencan (GERMANY)
I've posted a few messages in various camera related threads over the last months. I have a custom build board with bf548 cpu and OV9655 camera sensor. It took me a lot of time to change the blackfin_cam driver to work with the "new" EPPI port on the bf548 series and to set all the relevant registers. The problem I still have is very mysterious. I lost several weeks to this, still no success. The problem is that I got a very nice picture when the room ist bright (sunshine, a lot of lamps...), but when the lights are lower I got sync problems. When its almost dark the picture is green with a lot of horizontal sync issues.
I will attach some sample pictures. Note that they have different dimension, because I resized the images after I made a desktop snapshot of the viewer program.
Good.jpg is with enough lighting.
Bad1.jpg when I turn off a big light in the room.
bad2.jpg was made with my hand over the sensor.
I would appreciate any help