Small camera + LCD project

[ronsimpson]

Here's a 2.8" LCD

Camera 640x480, display 320x240
Some times I take 2x2=4 pixels and average then to make one pixel on the display. In this case you might only need 2 or 4 lines of buffer assuming you can have the same frame rate. If the frame rate is different then you will need to have a full frame of buffer.

 

[dougy83]

Camera 640x480, display 320x240
Some times I take 2x2=4 pixels and average then to make one pixel on the display. In this case you might only need 2 or 4 lines of buffer assuming you can have the same frame rate. If the frame rate is different then you will need to have a full frame of buffer.

Just ask the camera to scale it for you to CIF. It has its own processor onboard.

 

[gophert]

Just ask the camera to scale it for you to CIF. It has its own processor onboard.

How does one ask the camera to do this? Does it prefer a "please" or are direct orders more effective?

 

[throbscottle]

Ah, that makes more sense. So the uC only needs to store enough to be able to change the framerate and resolution if needed.

So, can I pass the RGB data to an IL9325 or similar display unchanged, then, except needing scaling and appropriate timing?

 

[throbscottle]

Data sheep for the CCD says it can be asked to output different formats. I had thought about averaging. It needs to have direct orders, asking nicely just looks unprofessional.
I realised I can do an overlay just passing the data through the micro and change the relevant pixels as they come along. Some of those display modules have a touchscreen too, I guess they just output coordinates so it should be easy to calculate what to change to get a crosshair.