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Altera_Forum's avatar
Altera_Forum
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17 years ago

Preserving Unconnected Nets for Signal Tap

Is there any way of preserving nets that are unconnected to anything other than signal tap? I want to add a counter to monitor another signal that has no other purpose other than viewing in ST.
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

The attribute no prune works for sure but there is a second way to do it.

If you put signaltap in pre-synthesis mode (after you've done an elaboration) you will be able to selected fanless ouput signals. This has the advantage that if signaltap is not instantiated the node will be synthesised away and wont waste cells and you don't need to do special attribute tricks.

Eg

entity

port

usefull1

...

debug_out1 --> unconnected --> connect it to stp if you need it:

Hopefully helpfull