I am trying to connect an omnivision ov7740 vga sensor to the adv7390, to make a composite SD PAL video signal.
It is wired up with 8-bit interfacing, using external HSYNC and VSYNC and a 27MHz clock.
I got as far as to generating a stable, composite signal that syncs OK. Unfortunately the colors are *WAY* off.
I can clearly recognize the picture, but I get a massive pink/blue tint to the picture, and no green output.
Checking the datasheets I realize that the OV7740 outputs YUV color, and the ADV7390 wants YPrPb.
I had previously assumed they were the same/close enough, but I now begin to suspect I may have been mistaken.
Looking thru the internet I find suggestions to suggest either.
So, my question is simply: SHOULD yuv color be possible to use with the ADV7390/91 or not?
Also, looking thru engineerzone I can see that somebody attempted to interface the omnivision YUV-colorspace sensors
previously, but I didnt see a clear result in that thread.
As I had not managed to route the clocks thru the EVM, I have wired the clock & pixel path external to the evm (I am
just using the evm for I2c control and Power), so it is certainly possible that is mixed up somehow. Knowing if I should
expect this to work or not would certainly speed up my debugging!