Re: OMAP3 ISP outputs 5555 5555 5555 5555 ...

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Hi Bastian,

On Tuesday 22 March 2011 17:11:04 Bastian Hecht wrote:
> Hello omap isp devs,
> 
> maybe you can help me, I am a bit desperate with my current cam problem:
> 
> I use a ov5642 chip and get only 0x55 in my data output when I use a
> camclk > 1 MHz. With 1 MHz data rate from the camera chip to the omap
> all works (well the colorspace is strange - it's greenish, but that is
> not my main concern).
> I looked up the data on the oscilloscope and all flanks seem to be
> fine at the isp. Very clear cuts with 4 MHz and 10MHz. Also the data
> pins are flickering fine. Looks like a picture.
> 
> I found that the isp stats module uses 0x55 as a magic number but I
> don't see why it should confuse my readout.
> 
> I use 2592x1944 raw bayer output via the ccdc. Next to the logical
> right config I tried all possible configurations of vs/hs active high
> and low on camera and isp. The isp gets the vs flanks right as the
> images come out in time (sometimes it misses 1 frame).
> 
> Anyone of you had this behaviour before?

How do you capture images ? yavta will fill buffers with 0x55 before queueing 
them, so this might indicate that no data is written to the buffer at all.

-- 
Regards,

Laurent Pinchart
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