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Honored Contributorerror while compiling in quartus 2 version 11
While compiling my code in version 11 I received this error message
Error (10568): VHDL error at mylab2.vhd(23): can't write to interface object "decode_out" of mode IN The code looks like this library ieee; use ieee.std_logic_1164.all; ENTITY mylab2 IS PORT ( input_select : IN STD_LOGIC; a_in, b_in : IN STD_LOGIC_VECTOR(3 downto 0); decode_out : STD_LOGIC_VECTOR(6 downto 0) ); END mylab2; ARCHITECTURE a OF mylab2 IS BEGIN PROCESS(input_select, a_in, b_in) BEGIN IF (input_select = '0')THEN CASE a_in IS WHEN "0000" => decode_out <= "1111110"; WHEN "0001" => decode_out <= "0110000"; WHEN "0010" => decode_out <= "1101101"; WHEN "0011" => decode_out <= "1111001"; WHEN "0100" => decode_out <= "0110011"; WHEN "0101" => decode_out <= "1011011"; WHEN "0110" => decode_out <= "1011111"; WHEN "0111" => decode_out <= "1110000"; WHEN "1000" => decode_out <= "1111111"; WHEN "1001" => decode_out <= "1111011"; WHEN "1010" => decode_out <= "1110111"; WHEN "1011" => decode_out <= "0011111"; WHEN "1100" => decode_out <= "1001110"; WHEN "1101" => decode_out <= "0111101"; WHEN "1110" => decode_out <= "1001111"; WHEN "1111" => decode_out <= "1000111"; END CASE; ELSIF (input_select = '1') THEN CASE b_in IS WHEN "0000" => decode_out <= "1111110"; WHEN "0001" => decode_out <= "0110000"; WHEN "0010" => decode_out <= "1101101"; WHEN "0011" => decode_out <= "1111001"; WHEN "0100" => decode_out <= "0110011"; WHEN "0101" => decode_out <= "1011011"; WHEN "0110" => decode_out <= "1011111"; WHEN "0111" => decode_out <= "1110000"; WHEN "1000" => decode_out <= "1111111"; WHEN "1001" => decode_out <= "1111011"; WHEN "1010" => decode_out <= "1110111"; WHEN "1011" => decode_out <= "0011111"; WHEN "1100" => decode_out <= "1001110"; WHEN "1101" => decode_out <= "0111101"; WHEN "1110" => decode_out <= "1001111"; WHEN "1111" => decode_out <= "1000111"; END CASE; ELSE decode_out <= "0000000"; END IF; END PROCESS; END a; can any one help please?
