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EGrub's avatar
EGrub
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

BUG - Fir filter coefficient read mode

Hi all! For writing/reading coefficients I made a wrapper to compute the proper reset before accessing the Avalon slave. Writing seems to work fine but reading has issues Considering the FIR II IP...
EGrub's avatar
EGrub
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hi Chee Pin!

It is not only a mismatch between manual and the implementation. The implementation is for sure wrong! In Quartus 15.1 there is never a valid signal -> so a Avalon Master will never return proper data.

In Quartus 17.1 the valid signal is much to early -> Avalon Master will receive wrong and too much data!

Regarding simulation, I tried to setup a simulation. If I enable the Coefficients interface in Quartus 15.1 it doesn't even compile. With Quartus 17.1 it compiled but it did not work at all -> therefore another bug(s) in simulation as well.

Best regards,

Erich