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Altera_Forum
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18 years ago

FFT 7.1 streaming mode

Hi folks, I have two issues with the FFT 7.1 MegaCore in streaming mode. It is configured as 256-point 10-bit FFT. 1. when simulated in ModelSim, the functional model generated by MegaWiza...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Did you ever resolve the FFT v7.1 vho problem?

I have been having problems with the FFT v2.2.1 vho so I tried updating the FFT Megacore to v7.1. I get the problem you are having with the maximum exponent (-16 in my case) and the SOP/EOPs are not correctly generated.

Post synth netlist doesn't work properly when I create a netlist for just the FFT itself, and if I create a post synth netlist for full signal processing block ModelSim runs out of memory (I have 16 FFTs). The only way I am currently able to simulate is to generate I/O in ModelSim, export WLF to VCD, perform a Quartus simulation, export the results to VCD, then convert to WLF. It's not a quick or pleasant way to simulate.