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Newbie
laksram85
Posts: 1
Registered: ‎05-29-2012
0

chipscope signal inverted

Hi,

 

I'm using chipscope  in ISE13.2 to debug my design and one of the signals is shown inverted in the chipscope (displays 1 for 0 and 0 for 1)! I triple checked my design and it looks to me that it is getting inverted in chipscope!!

 

Any known issue or pointer is appreciated?

 

Thanks!

~Laks

 

 

Visitor
thomas1974
Posts: 37
Registered: ‎05-16-2012
0

Re: chipscope signal inverted

Can you sample it once more and list it twice in the list of signals? Is it possible the signal toogles with the clock and you are a bit too late to get it? Is is possible to register it once more to see the same behavior ?

Expert Contributor
rcingham
Posts: 2,010
Registered: ‎09-09-2010
0

Re: chipscope signal inverted

The signal may have been inverted by the Synthesizer or Mapper to make its life easier. You can stop that happening by adding a 'KEEP' attribute (in the source code).

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"If it don't work in simulation, it won't work on the board."