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Explorer
Explorer
890 Views
Registered: ‎05-16-2014

Pin-pointing a constraint error

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One of our project issues a constraint error during the PAR. Using ISE 14.7. When one views the PROJECT.PAR file one finds the constraint error (has an *) and the setup or hold tie violation and the clock associated with the error. 

 

No timing report is generated. We use scripts and not the GUI.

 

How does one find the exact register causing the error?

 

(I have looked at several files and cannot find the exact register of the error)

 

Thanks

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1 Solution

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Historian
Historian
1,406 Views
Registered: ‎01-23-2009

Re: Pin-pointing a constraint error

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Detailed timing reports are generated by the "trce" program. If this is run, then this will result in a .twr file (which is human readable) and a .twx file. Timing analysis results can be viewed (and even very limited customized reports can be generated) using the "timingan" tool.

 

Of course, this is all integrated in to the Project Navigator - you can open the interactive timing report viewer once you have finished implementing the design (I don't remember exactly where in the menus you find the mechanism, but it is in the list of options available after running place and route).

 

Avrum

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2 Replies
Historian
Historian
1,407 Views
Registered: ‎01-23-2009

Re: Pin-pointing a constraint error

Jump to solution

Detailed timing reports are generated by the "trce" program. If this is run, then this will result in a .twr file (which is human readable) and a .twx file. Timing analysis results can be viewed (and even very limited customized reports can be generated) using the "timingan" tool.

 

Of course, this is all integrated in to the Project Navigator - you can open the interactive timing report viewer once you have finished implementing the design (I don't remember exactly where in the menus you find the mechanism, but it is in the list of options available after running place and route).

 

Avrum

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Explorer
Explorer
864 Views
Registered: ‎05-16-2014

Re: Pin-pointing a constraint error

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Thanks. Let me try that.

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