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Voyager
Voyager
112 Views
Registered: ‎05-30-2018

PULLUP constraint isn't added to constraints.xdc

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Hello,

When I change Pull Type for a particular pin and then click to Save, I'm requested to rerun synthesis.

To my surprise this action doesn't change the content of the constraints.xdc and after synthesis is finished I see that Pull Type for this pin keeps its previous (default) value.

Any comments ?

Thanks.

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Xilinx Employee
Xilinx Employee
59 Views
Registered: ‎05-14-2008

Re: PULLUP constraint isn't added to constraints.xdc

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What you changed about any property of a subject in the netlist will be saved to your target XDC file after you click on "save constraints" button.

You don't need to wait for Synthesis to complete to check if your change takes effect.

You can check your target XDC and see if the modified property is saved to it before you rerun Synthesis.

-vivian

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如果提供的信息能解决您的问题,请标记为“接受为解决方案”。
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2 Replies
Voyager
Voyager
100 Views
Registered: ‎05-30-2018

Re: PULLUP constraint isn't added to constraints.xdc

Jump to solution

After another nth attempt it finally worked.

I'm wondering is there a magic action sequence for processing these .xdc files.

0 Kudos
Highlighted
Xilinx Employee
Xilinx Employee
60 Views
Registered: ‎05-14-2008

Re: PULLUP constraint isn't added to constraints.xdc

Jump to solution

What you changed about any property of a subject in the netlist will be saved to your target XDC file after you click on "save constraints" button.

You don't need to wait for Synthesis to complete to check if your change takes effect.

You can check your target XDC and see if the modified property is saved to it before you rerun Synthesis.

-vivian

-------------------------------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------------------------------
如果提供的信息能解决您的问题,请标记为“接受为解决方案”。
如果您认为帖子有帮助,请点击“奖励”。谢谢!
-------------------------------------------------------------------------------------------------