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Altera_Forum's avatar
Altera_Forum
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13 years ago

Case don't care statement won't work

Hello, I am wondering why I am getting an error when using a don't care statement in a case. Here is a portion of the code: when "1000--" => add_bus_out0 <= a_bus_in; add_bus_out1 <= b_bus_in; ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Case with don't care does work in Quartus 12. The warning suggests that you forget to write case? instead of case. 

case? request is
when "1---" => grant <= "1000";
when "01--" => grant <= "0100";
when "001-" => grant <= "0010";
when "0001" => grant <= "0001";
when others => grant <= "0000";
end case?;