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Altera_Forum's avatar
Altera_Forum
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14 years ago

Strange FFT Output

I've been using SignalTap to create a CSV file of the output from my FFT engine. However, when looking at the output in Matlab, it doesn't look right at all. I know that the ADC's working prop...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

yes it does seem asserted all the time, but it is not, you need to put an option in your down stream fft state machine, that says that when sink_valid is high you sample and when it is not, you do not sample. This is made clearer in the Avalon interface specifications, read the section about data streaming and its control