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Altera_Forum
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14 years ago

Trying to test Filter using NCO Megafunction and Signal Tap Analyzer?

I've built a low-pass filter using Fdatool in matlab and used HDL coder in matlab to get a vhdl to simulate on hardware. i'm trying to use the NCO megafunction to generate a signal to be filtered in ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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I suspect its your trigger logic. You've got it setup to trigger when the NCO value is exactly all zeros. If you calculate how often that is likely to occur, you might find its infrequent. Try a different trigger source, eg. a push button, or Avalon-MM PIO signal.

Cheers,

Dave

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I thought if i had all the triggers set to don't care, it wouldn't matter what change occurred at that particular node and the signal tap would activate.