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EGrub's avatar
EGrub
Icon for Occasional Contributor rankOccasional Contributor
6 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
6 years ago

Hi Chee Pin!

Sorry for my late answer!

I will not install Quartus 18.1 as there was no improvement on FIR or Quartus itself. The only updates I saw were done for the Pro version.

I'm afraid I can not promise that I will get some time for setting up another simulation. And yes simulation does not work but this thread was created because the real implementation does not behave like the manual! You can see the wave forms in my first post. So maybe that should be forwarded to the developers so that they can have a look to that.

The developers should have a simulation for the FIR including the coefficient reload. They should know that it does not work! That is very basic.

By the way from the design perspective it is a very bad implementation because it is declared as Avalon Bus but it needs upfront a reset which is not the way how the Avalon Bus is specified!

Best regards,

Erich