library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity BCDDecoder is
	port
	(
		digit    : in std_logic_vector(3 downto 0);
		segments : out std_logic_vector(6 downto 0)
	);
end BCDDecoder;

architecture rtl of BCDDecoder is

begin

	process(digit)
	begin
		case digit is
		when "0000" => segments <= "0000001"; -- "0"
		when "0001" => segments <= "1001111"; -- "1"
		when "0010" => segments <= "0010010"; -- "2"
		when "0011" => segments <= "0000110"; -- "3"
		when "0100" => segments <= "1001100"; -- "4"
		when "0101" => segments <= "0100100"; -- "5"
		when "0110" => segments <= "0100000"; -- "6"
		when "0111" => segments <= "0001111"; -- "7"
		when "1000" => segments <= "0000000"; -- "8"
		when "1001" => segments <= "0000100"; -- "9"
		when "1010" => segments <= "0000010"; -- "A"
		when "1011" => segments <= "1100000"; -- "B"
		when "1100" => segments <= "0110001"; -- "C"
		when "1101" => segments <= "1000010"; -- "D"
		when "1110" => segments <= "0110000"; -- "E"
		when others => segments <= "0111000"; -- "F" "1111"
		end case;
	end process;

end;