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Observer marte
Observer
4,584 Views
Registered: ‎09-06-2012

How I can understand a route?

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Hi,

 

I wish force some routes by UCF, but I want understand how interpret all this values:

 

NET "U1_RP1/out1"
ROUTE="{3;1;5vlx50tff1136;a7488f7c!-1;-69680;-63848;S!0;0;-8!1;-683;-56!"
"2;0;328!3;843;168;L!}";

 

Somebody know any userguide for that?

 

Thanks

 

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Xilinx Employee
Xilinx Employee
5,798 Views
Registered: ‎07-01-2008

Re: How I can understand a route?

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The dirt constraints are actually relative constraints rather than absolute and can be used on any net as long as the same number of pins and relative pin locations is maintained. The constraints are not human readable and so it helps to keep the NCD that was used to generate the constrait available as a reference.

5 Replies
Scholar pratham
Scholar
4,579 Views
Registered: ‎06-05-2013

Re: How I can understand a route?

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Hi,

 

You mean you want to read DIRT Constraint..if it is then let me tell you there no user guide to interpert DIRT Constraaint.

 

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Community Manager
Community Manager
4,574 Views
Registered: ‎06-14-2012

Re: How I can understand a route?

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DIRT constraints are inferred by the tool. The user can use it as is.

 

These are absolute locations for the router to understand and lock the routing of the net.

Ideally these numbers shouldnt mean much to user. There is some more information on DIRT and how to apply in the following AR.Hope it helps.

 

http://www.xilinx.com/support/answers/35556.html

Xilinx Employee
Xilinx Employee
5,799 Views
Registered: ‎07-01-2008

Re: How I can understand a route?

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The dirt constraints are actually relative constraints rather than absolute and can be used on any net as long as the same number of pins and relative pin locations is maintained. The constraints are not human readable and so it helps to keep the NCD that was used to generate the constrait available as a reference.

Observer marte
Observer
4,504 Views
Registered: ‎09-06-2012

Re: How I can understand a route?

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About route priority? The PAR first look about dirt constraints, and only after that start routing the rest of the routes, right?

 

Best Regards,

M

 

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Scholar pratham
Scholar
4,498 Views
Registered: ‎06-05-2013

Re: How I can understand a route?

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Hi,

 

Yes you are right.

 

Regards,

Prathamesh

 

 

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-Pratham

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Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.

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