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Visitor dung_mei
Visitor
248 Views
Registered: ‎01-27-2019

Identify and Recommend Missing Timing Constraints

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What effect do timing constraints have on the implementation tools? What do the tools do if there are no constraints applied?

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Moderator
Moderator
182 Views
Registered: ‎03-16-2017

Re: Identify and Recommend Missing Timing Constraints

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Hi @dung_mei ,

Do you have further queries on this thread? If no, please close the thread by marking it as accepted solution. 

Else let us know about your queries.

Regards,
hemangd

Don't forget to give kudos and mark it as accepted solution if your issue gets resolved.
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Scholar drjohnsmith
Scholar
238 Views
Registered: ‎07-09-2009

Re: Identify and Recommend Missing Timing Constraints

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The implimentation tools run till they meet constraints,

Assuming you have pins constrained,

  then give it a go, see what happens when you try to make a chip.

Minimum timing constraint you need is the clock period / frequency your supplying the chip with.

 

Moderator
Moderator
215 Views
Registered: ‎03-16-2017

Re: Identify and Recommend Missing Timing Constraints

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Hi @dung_mei ,

Basic Timing constraints are for the tool. Without timing constraints your design will work on board. But before going on the board you can check your project design with tool itself using the timing constraints that will my project design successfully work on/with this frequency/clock or not . And here timing constraints will come into the picture. 

So, i gave you this a overall view of timing constraints and why it needed. 

 

>>What do the tools do if there are no constraints applied?

Tool will throw warning/critical warning if you do not apply basic timing constraints like create_clock. 

 

This video will provide info. on creating basic timing constraints - https://www.xilinx.com/video/hardware/creating-basic-clock-constraints.html

 

Regards,
hemangd

Don't forget to give kudos and mark it as accepted solution if your issue gets resolved.
Moderator
Moderator
183 Views
Registered: ‎03-16-2017

Re: Identify and Recommend Missing Timing Constraints

Jump to solution

Hi @dung_mei ,

Do you have further queries on this thread? If no, please close the thread by marking it as accepted solution. 

Else let us know about your queries.

Regards,
hemangd

Don't forget to give kudos and mark it as accepted solution if your issue gets resolved.