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raptor
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Registered: ‎01-14-2019

Dspace RTI build error due to timing requirements

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Hi,

Dspace shows RTI build error because the design fails to meet timing requirement. I checked the complete timing report and all the paths in the report have positive slack. Can someone tell me how a positive slack can cause timing errors.

timing error.PNG

 

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raptor
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Registered: ‎01-14-2019

Hello Yash

I found the problem. For some reason the timing report generated in MATLAB was different from the one generated in Vivado.

Vivado identified paths with negative slack and I was able to remove the delay.

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yashp
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Registered: ‎01-16-2013
Hi,

I guess the error mentioned is suspect of timing violations. Is it functional issue? Or on board failure?

The only reason when timing slack is positive and has issue is incorrect constraints or sometimes over constraint design (exception constraints overshadowing the required constraints). Please validate the constraints.

If from constraints side everything looks perfect then there is something in design causing the failure (CDC, control signals, clocking topology etc.)

Thanks,
Yash
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raptor
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Visitor
703 Views
Registered: ‎01-14-2019

Hello Yash

I found the problem. For some reason the timing report generated in MATLAB was different from the one generated in Vivado.

Vivado identified paths with negative slack and I was able to remove the delay.

View solution in original post

0 Kudos