Problem with OV7670 (no FIFO)

thanhnt · ‎2015-10-10

Posted on October 10, 2015 at 21:52

Hi Everyone,

I am working on OV7670 module (no FIFO) with STM32F407 chip. Due to I want to get image in 640x480 pixels so I try to manual scan (don't use DMCI). I set REG_CLKRC = CLK_EXT and control clock (set LOW/HIGH for PA8) to get data. The result seems good except there is a ''white'' space on top. I can call transparent white space because I still see items.

This is dynamic area because sometime it is very small some time it very large. Sometime it is disappeared. I don't understand it. Can you help me?

Thank you very much.

thanhnt · ‎2015-10-13

Posted on October 14, 2015 at 05:33

Can anybody help me?

BTW, if I use test pattern it is good. Therefore I think problem comes from register. But there are many secret registers with OV7670 :(