Honored ContributorHi there,
I'm looking for the best fastest way of Avalon stream (Avalon-MM/ST, Source/Sink), because I need fast streaming of SDR data). Does anybody have a simple sample like megacore FFT/FIR to verilog and plug-in SOPC Builder through component editor connect to SDRAM/SGDMA? Thanks, Sean
Honored ContributorYour fastest method would be to build your own DMA controller to read/write directly to the SDRAM. However, that's a significant effort. So the next best would be to use the SGDMA controllers and use Avalon-ST interfaces to get the data to/from the SGDMA controller.
A simple example is the Triple-speed ethernet reference design. JakeHonored ContributorThank you for your help. I will look into it.
Best regards, Sean NguyenHonored ContributorI am using the sdram controller that comes with SOPC builder. You can achieve 98%+ throughput to the SDRAM if you connect your own MM master to it. On a speed grade 8 CIII I can meet timing running at 80Mhz easily.
I can put out some example VHDL (don't know verilog) if you need help doing a MM master component that reads and writes to the SDRAM controller.Honored ContributorI'm be able to connect DMA controller working, but I would like to know the speed (data rate ????kbs). Do you know the Avalon-MM data rate?
Honored ContributorThe avalon MM interface is as fast as the clock you are driving your components with. And you have a variable data port width.
I use an 80Mhz clock on my components and am using a 16bit data port SDRAM. So I can achieve close to 160MB/s to the SDRAM.
