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Altera_Forum
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11 years ago

How to implement DE0 SDRAM as 2-port RAM

I currently use the tiny bit of memory on the FPGA for a computer vision project but it's way too limited. I have a stand-alone SDRAM controller from Altera (partially pasted below) but I need one mo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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What I really need is the closest thing possible to a 2-port RAM.

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So why not use a board with QDR II+ SRAM then?

The bottom-line is you have no hope of any sort of success without simulating your design. You need a simulation of how your camera interface works and how your VGA interface works. With those two simulations, you can determine if you can map them as Avalon-MM bridges, or if you can convert them to streaming interfaces. Then you can determined the memory interface requirements, so that you an determined whether you can use SDRAM or you require QDR II+ SRAM.

SDRAM is good for bursts, not as good for random accesses, but it can implement large memories and cheap. QDR II+ SRAM is good for random access, but its small and expensive.

Cheers,

Dave