Timing requirement

Placement, modules, components and accessories; the ones that exist and the the nice-to-be's
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kuroro
Posts: 4
Joined: Thu Mar 09, 2017 11:40 am

Timing requirement

Post by kuroro » Thu Mar 23, 2017 2:31 pm

Hi,

I've tried to regenerate a bitstream from the projet v0.94 in the Redpitaya repository, and at the timing check, the requirement were not met.

for example :
Image

Is it normal ? do i have missed some step ?
Thx :)

Nils Roos
Posts: 1441
Joined: Sat Jun 07, 2014 12:49 pm
Location: Königswinter

Re: Timing requirement

Post by Nils Roos » Thu Mar 23, 2017 8:10 pm

Hi,

it is normal that some of the projects >0.92 do not meet timing requirements in implementation. Most of the violations are marginal, and some only occur because not all constraints are defined correctly. 2ns of negative hold slack is not marginal, but since it's on an inter-clock path, it's probably just a matter of underdefined constraints.

If you find a way to improve this situation, I'm sure the developers will be thrilled to hear about it ;O)

kuroro
Posts: 4
Joined: Thu Mar 09, 2017 11:40 am

Re: Timing requirement

Post by kuroro » Tue Mar 28, 2017 11:12 am

Oh thx for the answer :)
I just wanted to be sure that i've done nothing wrong

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