OV7670 w/FIFO FPS

[ppk]

Hi, I'm testing a camera module, OV7670 with al422b RAM (inspired from this thread by craiglindley). I'm using a Teensy 3.6 at 180 MHz and a ILI9341 display.

So far I've managed to get the FPS up to 15 using QQVGA and RGB565.


The bottleneck seems to be reading the 38400 bytes from the RAM fast enough.

I was wondering if anyone has tested this camera and managed to get a FPS around 30?

 

[Yannick]

Hello ppk,

I just have in project to test this camera.
So I read the link craigandheather.net/misc/TeensyCamera.zip
Craig Lindley uses the OV7670 without FIFO.
FIFO is usefull to read only one frame if your mcu is too slow and cannot follow the video stream.
In your/our case we must/want go as fast as the video.
With the FIFO we must make the clock to read the data.
Which solution have you choosen to make this clock?
(Hardware, Dma, Bit banging,???)
How much have you adapted Craig Lindley's code?
Could you show your code? (Forum Rule)

Sincerely, y.

 

[Theremingenieur]

Forum rule is to show your code to allow others to reproduce a problem for which you need help with. There is no obligation to show code which works...

 

[Yannick]

@ theremingenieur,

thank's I miss understood the "sacrosanct" rule...

Then let's say that this code about which PPK complains more or less, "does not work " for "a FPS around 30".