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Altera_Forum
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17 years ago

Signal Tap and Quartus II FItter

Hi, I've completed a simulation scheme and everything is working. Now I have to test it on my Altera DE2 board so i've changed my scheme with real GPIO input and a signal tap block at the end o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Make sure that an output pin depends on the signals that are monitored by SignalTap.

Quartus will optimize away any logic that does not affect an output pin EVEN if you have connected it to SignalTap.

To preserve the nodes so that SignalTap can see them, use the Preserve Fan-out Free Register Node logic option.

Just something to check