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Altera_Forum
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14 years ago

Problems with FFT Megacore of Variable Streaming Floating Point Architecture

I've already used with success FFT Megacore of Variable Streaming Fixed Point architecture. Now I'm trying to use Floating Point architecture and it seems to me that the Core is not responding proper...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Hi thepancake, thank you for your answer.

First of all, I wanted to be sure there was no open known issue about it. So what you say makes me think I'm making some stupid mistake.

I'm attaching the Avalon streaming waveforms I'm obtaining from SignalTap as a jpeg: they're not much clear, but if you would help me you should be able to understand what's going on on the external ports of my FFT core.

I'm actually giving a constant (of value 100) real input and I'm not obtaining the FFT I'm expecting (only the first real sample to value 100*16, since the FFT is on 16 points). As I said in my last post, the output is even not an hermitian symmetrical one.

What's your opinion about it?

Regards,

Lorenzo