LIBRARY IEEE;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
USE IEEE.STD_LOGIC_1164.all;

ENTITY Decode2 IS
	PORT(
		Enable							: IN 	STD_LOGIC;
		clk								: IN	STD_LOGIC;
		Data							: IN	STD_LOGIC;
		DataReady						: OUT	STD_LOGIC;
		R								: OUT	STD_LOGIC;
		A								: OUT	STD_LOGIC;
		B								: OUT	STD_LOGIC;
		LEFTRIGHTSIGN					: OUT	STD_LOGIC;
		UPDOWNSIGN						: OUT	STD_LOGIC;
		LEFTRIGHTOUT					: OUT	STD_LOGIC_VECTOR(7 DOWNTO 0);
		UPDOWNOUT						: OUT 	STD_LOGIC_VECTOR(7 DOWNTO 0));

END Decode2;


ARCHITECTURE a OF Decode2 IS

SIGNAL Bit			: STD_LOGIC_VECTOR(2 DOWNTO 0);
SIGNAL Byte			: STD_LOGIC_VECTOR(2 DOWNTO 0);
SIGNAL UPDOWN		: STD_LOGIC_VECTOR(7 DOWNTO 0);
SIGNAL LEFTRIGHT	: STD_LOGIC_VECTOR(7 DOWNTO 0);

BEGIN
	PROCESS (clk)
	BEGIN
		IF(Clk'EVENT and Clk = '1') THEN								
			IF(Enable = '0') THEN
				Bit	 <= "111";
				Byte <= "111";
				A <= '0';
				B <= '0';
				R <= '0';
				DataReady <= '0';
				UPDOWN <= "00000000";
				LEFTRIGHT <= "00000000";
				UPDOWNOUT <= "00000000";
				LEFTRIGHTOUT <= "00000000";
				UPDOWNSIGN <= '0';
				LEFTRIGHTSIGN <= '0';
			ELSE
				IF(Bit = "111") THEN
					Bit <= "000";
					Byte <= Byte + 1;						
				ELSE
					Bit <= Bit +1;
				END IF;		
						
				IF(Byte = "000" AND Bit = "111" AND Data = '1') THEN  --is A Pressed?
					A <= '1';
				END IF;
				IF(Byte = "000" AND Bit = "110" AND Data = '1') THEN  --is B Pressed?
					B <= '1';
				END IF;
				IF(Byte = "001" AND Bit = "010" AND Data = '1') THEN  --is R Pressed?
					R <= '1';
				END IF;		

				IF(Byte = "100") THEN								  --Analog LeftRight?
					LEFTRIGHT <= LEFTRIGHT(6 DOWNTO 0) & Data;
				ELSIF(Byte = "101") THEN								  --Analog UPDOWN?
					UPDOWN <= UPDOWN(6 DOWNTO 0) & Data;					
				ELSIF(Byte = "110" AND Bit = "111") THEN

					--IF(LEFTRIGHT(7) = '0' AND LEFTRIGHT(6) = '0')THEN
					--	LEFTRIGHTOUT <= "11111111";
					--	LEFTRIGHTSIGN <= '1';
					--ELSIF(LEFTRIGHT(7) = '1' AND LEFTRIGHT(6) = '1') THEN
					--	LEFTRIGHTOUT <= "00000001";
					--	LEFTRIGHTSIGN <= '0';
					--ELSE
					--	LEFTRIGHTOUT <= "00000000";
					--	LEFTRIGHTSIGN <= '0';
					--END IF; 
					IF(LEFTRIGHT(7) = '0' AND LEFTRIGHT(6) = '0' AND LEFTRIGHT(5) = '0') THEN
						LEFTRIGHTOUT <= "11111101";
						LEFTRIGHTSIGN <= '1';
					ELSIF(LEFTRIGHT(7) = '0' AND LEFTRIGHT(6) = '0' AND LEFTRIGHT(5) = '1') THEN
						LEFTRIGHTOUT <= "11111110";
						LEFTRIGHTSIGN <= '1';
					ELSIF(LEFTRIGHT(7) = '0' AND LEFTRIGHT(6) = '1' AND LEFTRIGHT(5) = '0') THEN
						LEFTRIGHTOUT <= "11111111";
						LEFTRIGHTSIGN <= '1';
					ELSIF(LEFTRIGHT(7) = '0' AND LEFTRIGHT(6) = '1' AND LEFTRIGHT(5) = '1') THEN
						LEFTRIGHTOUT <= "00000000";
						LEFTRIGHTSIGN <= '0';
					ELSIF(LEFTRIGHT(7) = '1' AND LEFTRIGHT(6) = '0' AND LEFTRIGHT(5) = '0') THEN
						LEFTRIGHTOUT <= "00000000";
						LEFTRIGHTSIGN <= '0';
					ELSIF(LEFTRIGHT(7) = '1' AND LEFTRIGHT(6) = '0' AND LEFTRIGHT(5) = '1') THEN
						LEFTRIGHTOUT <= "00000001";
						LEFTRIGHTSIGN <= '0';
					ELSIF(LEFTRIGHT(7) = '1' AND LEFTRIGHT(6) = '1' AND LEFTRIGHT(5) = '0') THEN
						LEFTRIGHTOUT <= "00000010";
						LEFTRIGHTSIGN <= '0';
					ELSIF(LEFTRIGHT(7) = '1' AND LEFTRIGHT(6) = '1' AND LEFTRIGHT(5) = '1') THEN
						LEFTRIGHTOUT <= "00000011";
						LEFTRIGHTSIGN <= '0';
					END IF;
					
					IF(UPDOWN(7) = '0' AND UPDOWN(6) = '0' AND UPDOWN(5) = '0') THEN
						UPDOWNOUT <= "11111101";
						UPDOWNSIGN <= '1';
					ELSIF(UPDOWN(7) = '0' AND UPDOWN(6) = '0' AND UPDOWN(5) = '1') THEN
						UPDOWNOUT <= "11111110";
						UPDOWNSIGN <= '1';
					ELSIF(UPDOWN(7) = '0' AND UPDOWN(6) = '1' AND UPDOWN(5) = '0') THEN
						UPDOWNOUT <= "11111111";
						UPDOWNSIGN <= '1';
					ELSIF(UPDOWN(7) = '0' AND UPDOWN(6) = '1' AND UPDOWN(5) = '1') THEN
						UPDOWNOUT <= "00000000";
						UPDOWNSIGN <= '0';
					ELSIF(UPDOWN(7) = '1' AND UPDOWN(6) = '0' AND UPDOWN(5) = '0') THEN
						UPDOWNOUT <= "00000000";
						UPDOWNSIGN <= '0';
					ELSIF(UPDOWN(7) = '1' AND UPDOWN(6) = '0' AND UPDOWN(5) = '1') THEN
						UPDOWNOUT <= "00000001";
						UPDOWNSIGN <= '0';
					ELSIF(UPDOWN(7) = '1' AND UPDOWN(6) = '1' AND UPDOWN(5) = '0') THEN
						UPDOWNOUT <= "00000010";
						UPDOWNSIGN <= '0';
					ELSIF(UPDOWN(7) = '1' AND UPDOWN(6) = '1' AND UPDOWN(5) = '1') THEN
						UPDOWNOUT <= "00000011";
						UPDOWNSIGN <= '0';
					END IF;

					--IF(UPDOWN(7) = '0' AND UPDOWN(6) = '0')THEN
					--	UPDOWNOUT <= "11111111";
					--	UPDOWNSIGN <= '1';
					--ELSIF(UPDOWN(7) = '1' AND UPDOWN(6) = '1') THEN
					--	UPDOWNOUT <= "00000001";
					--	UPDOWNSIGN <= '0';
					--ELSE
					--	UPDOWNOUT <= "00000000";
					--	UPDOWNSIGN <= '0';
					--END IF; 

				ELSIF(Byte = "111" AND Bit = "000") THEN
						DataReady <= '1';
				END IF;
			END IF;

		END IF;
	END PROCESS;
END a;  --behavior