-- file: char_codes
-- The entity controls what the address outputs based on what the
-- state of the screen is.


library ieee; 
library work;
use work.LCD_types.all;
use ieee.std_logic_1164.all; 

	-- Outputs all the address to an LCD
	entity char_codes is
		port (
			screen: in std_logic;
			address: out std_logic_vector(addressbit-1 downto 0)
			  );
	end entity char_codes;


architecture behaviour of char_codes is

begin

-- choose the address of the screen based of the input signal

	with screen select
		address <= 
			"00000000" when '0',
			"00100000" when '1',
			"00000000" when others;

end behaviour;