VGA OV7670; FIFO or no FIFO?

[Spike124]

I have just bought a VGA OV7670 camera module to use on either my Arduino Uno or Arduino Mega 2560 & have just read something about needing a 'FIFO'! Can anyone enlighten me please? Thanks

 

[Gryd3]

I have just bought a VGA OV7670 camera module to use on either my Arduino Uno or Arduino Mega 2560 & have just read something about needing a 'FIFO'! Can anyone enlighten me please? Thanks

FIFO . First-in, First-out.

Can you share a model number for the camera module? It may just be talking about a buffer.
The camera can dump information incredibly quickly. Using a buffer allows a picture to be taken right away, and allow the microcontroller to process it be reading it from the buffer.

 

[Spike124]

VGA OV7670 IS the model number from what I can see. I think you're right though about FIFO being somewhere to dump the pictures. Looking on eBay, I've seen exactly the same camera but with a chip on the back & it's advertised as 'with FIFO'. But I've also seen things about wireless FIFO. I'm wondering if I rig up a micro sd card unit that I've got, if I could use THAT as a FIFO?

 

[Gryd3]

I'll have to do more digging, but this looks like the FIFO they use on a variation of the OV7670 you are using. I have not actually played with a camera module though. So we will both needs to do more digging.
https://www.frc.ri.cmu.edu/projects/buzzard/mve/HWSpecs-1/Documentation/AL422B_Data_Sheets.pdf

 

[Old Steve]

Spike, looking at the datasheet for the camera module, it already has an on-board FIFO. Check out the 'Functional block Diagram', (Figure 2).
http://www.voti.nl/docs/OV7670.pdf