-- 4-bit Hex to 7-segment display decoder
-- Jorge Ortiz, University of Kansas
-- Created for EECS 140 Lab 6

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

ENTITY Hex_to_LED IS
	-- No carry in, for demonstration purposes
	PORT (
        Hex       			: IN  STD_LOGIC_VECTOR(3 downto 0);
        Display       		: OUT  STD_LOGIC_VECTOR(6 downto 0));
END Hex_to_LED;

ARCHITECTURE Procedural of Hex_to_LED is

BEGIN
    PROCESS (Hex)
	BEGIN
		CASE Hex IS
             WHEN "0000" =>   Display <= "0000001";
             WHEN "0001" =>   Display <= "1001111";
             WHEN "0010" =>   Display <= "0010010";
             WHEN "0011" =>   Display <= "0000110";
             WHEN "0100" =>   Display <= "1001100";
             WHEN "0101" =>   Display <= "0100100";
             WHEN "0110" =>   Display <= "0100000";
             WHEN "0111" =>   Display <= "0001111";
             WHEN "1000" =>   Display <= "0000000";
             WHEN "1001" =>   Display <= "0000100";
             WHEN "1010" =>   Display <= "0001000";
             WHEN "1011" =>   Display <= "1100000";
             WHEN "1100" =>   Display <= "0110001";
             WHEN "1101" =>   Display <= "1000010";
             WHEN "1110" =>   Display <= "0110000";
             WHEN "1111" =>   Display <= "0111000";
             WHEN OTHERS =>   Display <= "1111110"; -- Dash
     END CASE;
	END PROCESS;

END Procedural;