Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Quartus Instantiated megafunction and then synthesized away

Hi, In my project i have instantiated more than one VHDL unit that realize a moving average filter. During Analysis and Synthesis i found that only for one i have the following info messages: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

The output of the instance is used in many part of the design. I receive this warning when i have added new logic that depends on it. However if i made some errors on the new logic, the old logic should still use the output being synthesized away and Quartus should keep them.

I don't know why all the logic that depends on the output is synthesized away.

Another thing is:

The output synthsized away is part of a custom record type. Is it possible that Quartus remove all the record through the design just because one element is synthesized away?