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ashbinbabu's avatar
ashbinbabu
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1 year ago

MAX10 Same Code Fitting Differently Each Time

Hi, We are using MAX10 in our server motherboard. Let's say our code has 3 main sections - A, B and C. Whenever I am making a small change in Section C, the working of Code in Section A and B are ch...
Hdl
RichardT_altera's avatar
RichardT_altera
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1 year ago

Yes, even adding a comment might change the tool's fitter seed/variation.

If you're interested, you can check out this white paper on the fitter algorithm:

https://www.intel.com/content/dam/support/us/en/programmable/support-resources/fpga-wiki/asset01/fittingalgorithms-and-seedsweeps.pdf


Other than using incremental compilation and logic lock, I don't think there's another way to keep other modules unchanged without using design partitioning.

If you don't plan to make further changes to the module, exporting the database could be a way to preserve the compilation results.


Regards,

Richard Tan


ashbinbabu's avatar
ashbinbabu
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1 year ago

Can you let us know what you meant by logic lock? MAX 10 doesn't support exporting database.

Regarding Seeds - We tried running design space explorer with different seed sweep and found that seed=6 has a better quality of fit. We want to try with 6 as the initial seed in our fitter settings. Let us know if this approach is correct or not.