Hi,I don't understand why the following code doesn't work, can you enlighten me ?
freq_authorization : process(clk) begin if rising_edge(clk) then if ((unsigned(freq) >= "00001100" ) and (unsigned(freq) <= "00111101" )) then --compare if freq entry is between 12 and 59 allowed_freq <= '1'; else allowed_freq <= '0'; end if; end if; end process freq_authorization;If it can help, modelsim is returning# ** Warning: NUMERIC_STD.">=": metavalue detected, returning FALSE when I run. Thanks for your help. EDIT : freq is in std_logic_vector(7 downto 0);
--- Quote Start --- What do you mean ? Freq is my entry port --- Quote End --- Yes, have you set the value for Freq in your testbench? if it contains 'U' (uninitialised) or 'X' (unknown) then you get the warning you have.