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Altera_Forum's avatar
Altera_Forum
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17 years ago

Multiple constant drivers error?

Hi there, The problem is that my project is running perfectly on ModelSim but when I've tried to compile it on Quartus 8.1 it gave me multiple constant drivers error. Here is part of the code...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi,

For every signal you must assign within one process only or one comb construct if it is not sequential. Inside the single process you will have multiple assignments for the signal. The compiler decides the logic to drive it then.

If then it encounters another drive concurrently then it gets lost...