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Altera_Forum's avatar
Altera_Forum
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15 years ago

VHDL multiplication operator

Hi all, I am new to coding in VHDL and using FPGAs. I keep getting this error when I go to complie my code. Error (10327): VHDL error : can't determine definiton of operator "*"--found 0 ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

you need to multiply by signed (or unsigned). You can just add a cast to std_logic i.e.

result <= std_logic_vector(signed(input)*constant);