Forum Discussion

RZhen11's avatar
RZhen11
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

preserve attribute doesn't seem to work for me

Dear Support, I'm having hard time working with SignalTap, can't find signals I'm interested easily. attribute preserve: boolean; attribute preserve of Signal1 : signal is true; attribute pres...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
5 years ago

If a signal does not show up in the Signal Tap pre-synthesis or post-fitting filter, there's a reason why the signal cannot be tapped, such as an output signal to a pin (no route back into the device) or a signal on a carry chain route (no route out of the carry chain). What are the signal(s) you are trying to tap?

If you can provide code, maybe the forum can help you add code to bring the signal out in a way that it can be tapped.

#iwork4intel