Fusion an Display with FPGA

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Thank u for ur answer iam using a Cyclone 2

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Then you have no chance of using internal RAM for a frame buffer. You have to use external ram.

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I tell a lie

It will depend on what device you are using. Older devices wont have enough. But even with newer ones, with all the losses due to innefficient memory implementation you wont have much memory left after you've put your frame buffer in.

What device are you using?

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Thank u for ur answer iam using a Cyclone 2

for reference:

1 M9k can store 512 x 16 bit data words.

Therefore, with a basic and easy addressing scheme at 640 pixels per line and 480 line you need

2x M9k per line

480 lines

= 960 x M9k.

The largest Arria 2 device has 950

largest Cyclone 4 has 720

Stratix 4 has about ~1000 to 1200 M9Ks but also has larger M144ks

So a simple addressing scheme wont do. Even if you made the addressing more efficient, you're going to lose >50% of your internal memories to a frame buffer.

Lesson - any large data dumps are usually best done off chip.

I tell a lie

It will depend on what device you are using. Older devices wont have enough. But even with newer ones, with all the losses due to innefficient memory implementation you wont have much memory left after you've put your frame buffer in.

What device are you using?

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For a frame buffer you will need external ram.

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can you explain me why?

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Depends on how you add the signals. If the cameras aren't operating sync locked, both images must be stored in a frame buffer before.

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thank you for this answer, now i am trying to realize a Framebuffer, i have a RAM with 1,152000 bit, for the a picture with the resolution 480 X 640 and 16 bit Color.

It is possible to realize a framebuffer?

I have readed somewhere that for VGA 480 X 640 X 16 i need 150 KB framebuffer........