Contributor
Regular ContributorHi,
If the exact same design can works well in v16.0 then it's unlikely your design issue and most likely is v18.0 issue.
I don't have good answer to you other than pls move away from v18.0 if possible and upgrade to latest Quartus version that contains bug fix for previous Quartus version.
Is there a reason why you can't move to newer Quartus version ?
Regards,
dlim
ContributorHi Deshi,
Because that if I want to use newest software, I need to apply for software installation.
Continue to above problem,
I found that the routing hotspots is different for the pof file got from V16.0 and V18.0, as follow two pictures :
v18.0
V16.0
From above two picture, the routing hotspots got from V16.0 is better compared to the one got V18.0 (many part exceeds 95%), I compared the advanced settings of these two version software:
For synthesis:
For V16.0, it has "Synthesis migration checks for stratix 10 " and V18.0 has no this item;
For V18.0, it has "Allow Register Dupilation" and "Allow Register Merging" and V16.0 does not see these item (maybe it enable these defaultly)
For advanced fitter,
For V16.0, it has " i/o placement optimization" and " Spectra-Q physical Synthesis" and V18.0 has no these item;
For V18.0, it has " Allow register Dupilation" and "Allow Register Merging" and V16.0 has no these item(maybe it enable these defaultly).
Besides above difference, other item is same for V16.0 and V18.0.
So, For V18.0, I closed the "Allow register Dupilation" and "Allow Register Mergin" Item, but the routing hotspots change more worse.
Could you tell me the difference for the complication between V16.0 and V18.0, and is there solution for that I can got the routing hotspots (got V18.0) same as V16.0?
Brs,
Lambert
