vga_rx.vhd

many application on kit SP-3: VGA, digital clock, counter, interface PS2....

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity VGA_Rx is
    Port ( clk50_in : in std_logic;
			sc : in std_logic_vector(7 downto 0);			
           Red_out : out std_logic;
           Green_out : out std_logic;
           Blue_out : out std_logic;
           hs_out : out std_logic;
           vs_out : out std_logic);
end VGA_Rx;

architecture Behavioral of VGA_Rx is
		signal Clk25					: std_logic;
		signal Horizontal_Counter	: std_logic_vector (9 downto 0);
		signal Vertical_Counter		: std_logic_vector (9 downto 0);

begin
--Generate 25Mhz Clock
C1:process (clk50_in)
begin
	if clk50_in'event and clk50_in='1' then
	  
		if (Clk25 = '0')then
	    Clk25 <= '1' after 2 ns;
		else
	    Clk25 <= '0' after 2 ns;
		end if;
		
	end if;
	
end process;		  

C2: process (Clk25)

--TYPE Screen_Line1 is ARRAY(0 to 7, 0 to 81) OF std_logic;
TYPE Screen_Line1 is ARRAY(0 to 7, 0 to 7) OF std_logic;

CONSTANT A : Screen_Line1 := (('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','1','0','0'),
										('0','0','1','0','1','1','0','0'),
										('0','0','1','1','1','1','0','0'),
										('0','1','0','0','0','1','1','0'),
										('0','1','0','0','0','1','1','0'),
										('1','1','1','0','1','1','1','1'));

CONSTANT B : Screen_Line1 := (('1','1','1','1','1','1','0','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','1','1','1','0','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('1','1','1','1','1','1','0','0'));

CONSTANT C : Screen_Line1 := (('0','0','1','1','1','0','0','0'),
										('0','1','1','0','0','1','0','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','0','0'),
										('0','1','1','0','0','0','0','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','1','0','0'),
										('0','0','1','1','1','0','0','0')); 
										
CONSTANT D : Screen_Line1 := (('0','1','1','1','1','1','1','0'),
										('0','0','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','1'),
										('0','1','1','1','1','1','1','0')); 
										
CONSTANT E : Screen_Line1 := (('0','1','1','1','1','1','1','0'),
										('0','0','1','1','0','0','1','0'),
										('0','0','1','1','0','1','0','0'),
										('0','0','1','1','1','1','0','0'),
										('0','0','1','1','1','1','0','0'),
										('0','0','1','1','0','1','0','0'),
										('0','0','1','1','0','0','1','0'),
										('0','1','1','1','1','1','1','0')); 				
										
CONSTANT F : Screen_Line1 := (( '0','1','1','1','1','1','1','0'),
										( '0','0','1','1','0','0','1','0'),
										( '0','0','1','1','0','1','0','0'),
										( '0','0','1','1','1','1','0','0'),
										( '0','0','1','1','0','1','0','0'),
										( '0','0','1','1','0','0','0','0'),
										( '0','0','1','1','0','0','0','0'),
										( '0','1','1','1','1','0','0','0'));
															
CONSTANT G : Screen_Line1 := (('0','0','1','1','1','0','1','0'),
										('0','1','1','0','0','1','1','0'),
										('1','1','0','0','0','0','1','0'),
										('1','1','0','0','0','0','0','0'),
										('1','0','0','1','1','1','1','0'),
										('1','1','0','0','1','1','1','1'),
										('0','1','1','0','0','1','1','0'),
										('0','0','1','1','1','1','0','0'));

CONSTANT H : Screen_Line1 := (('0','1','1','1','0','0','1','1'),
										('0','0','1','1','0','0','1','0'),
										('0','0','1','1','0','0','1','0'),
										('0','0','1','1','1','1','1','0'),
										('0','0','1','1','1','1','1','0'),
										('0','0','1','1','0','0','1','0'),
										('0','0','1','1','0','0','1','0'),
										('0','1','1','1','0','0','1','1')); 			

CONSTANT I : Screen_Line1 := (('0','0','1','1','1','1','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','1','1','1','1','0','0')); 		
										
CONSTANT J : Screen_Line1 := (('0','0','1','1','1','1','1','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('1','1','1','0','1','1','0','0'),
										('0','0','1','1','1','0','0','0')); 	
											
CONSTANT K : Screen_Line1 := (('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','1','1','0','0'),
										('0','1','1','1','1','0','0','0'),
										('0','1','1','1','0','0','0','0'),
										('0','1','1','0','1','0','0','0'),
										('0','1','1','0','0','1','0','0'),
										('0','1','1','0','0','0','1','0')); 	
										
CONSTANT L : Screen_Line1 := (('0','1','1','1','0','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','0','1','1','0','0','1','0'),
										('0','1','1','1','1','1','1','0'));
										
CONSTANT M : Screen_Line1 := (('0','1','0','0','0','0','0','1'),
										('0','1','0','0','0','0','1','1'),
										('0','1','1','0','0','1','1','1'),
										('0','1','1','1','1','0','1','1'),
										('0','1','0','1','0','0','1','1'),
										('0','1','0','0','0','0','1','1'),
										('0','1','0','0','0','0','1','1'),
										('0','1','0','0','0','0','1','1')); 		
										
CONSTANT N : Screen_Line1 := (('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','1','0','0','1','0'),
										('0','1','1','1','1','0','1','0'),
										('0','1','1','0','1','1','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0')); 	
										
CONSTANT O : Screen_Line1 := (('0','0','1','1','1','1','0','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','0','1','0'),
										('0','0','1','1','1','1','0','0')); 		
										
CONSTANT P : Screen_Line1 := (('1','1','1','1','1','1','0','0'),
										('0','1','1','0','0','1','1','0'),	
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','1','1','1','0','0'),
										('0','1','1','0','0','0','0','0'),
										('0','1','1','0','0','0','0','0'),
										('1','1','1','1','0','0','0','0'));										

CONSTANT Q : Screen_Line1 := (('0','0','1','1','1','1','1','0'),
										('0','1','1','0','0','0','0','1'),
										('0','1','1','0','0','0','0','1'),
										('0','1','1','0','0','0','0','1'),
										('0','1','1','0','0','0','0','1'),
										('0','1','1','0','1','1','0','1'),
										('0','1','1','0','0','1','1','1'),
										('0','0','1','1','1','1','1','1')); 		

CONSTANT R : Screen_Line1 := (('0','1','1','1','1','1','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','1','1','1','0','0'),
										('0','1','1','1','1','0','0','0'),
										('0','1','1','0','1','1','0','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','1','0','0','0','1','0')); 		
										
CONSTANT S : Screen_Line1 := (('0','1','1','1','1','1','1','0'),
										('1','0','0','0','0','0','0','1'),
										('1','1','0','0','0','0','0','1'),
										('0','1','1','0','0','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('1','0','0','0','0','1','1','0'),
										('1','0','0','0','0','0','0','1'),
										('0','1','1','1','1','1','1','0')); 		

CONSTANT T : Screen_Line1 := (('0','1','1','1','1','1','1','0'),
										('0','1','0','1','1','0','1','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','1','1','1','1','0','0')); 		
										
CONSTANT U : Screen_Line1 := (('1','1','1','0','0','1','1','1'),
										('1','1','0','0','0','0','1','0'),
										('1','1','0','0','0','0','1','0'),
										('1','1','0','0','0','0','1','0'),
										('1','1','0','0','0','0','1','0'),
										('1','1','0','0','0','0','1','0'),
										('0','1','1','0','0','1','0','0'),
										('0','0','1','1','1','0','0','0')); 		

CONSTANT V : Screen_Line1 := (('1','1','1','0','0','0','1','1'),
										('0','1','1','0','0','0','1','0'),
										('0','0','1','0','0','0','1','0'),
										('0','0','1','1','0','0','1','0'),
										('0','0','1','1','0','1','0','0'),
										('0','0','0','1','0','1','0','0'),
										('0','0','0','1','0','1','0','0'),
										('0','0','0','1','1','0','0','0')); 		

CONSTANT W : Screen_Line1 := (('0','1','0','0','0','0','1','0'),
										('0','1','0','0','0','0','1','0'),
										('0','1','0','0','0','0','1','0'),
										('0','1','0','0','0','0','1','0'),
										('0','1','0','1','1','0','1','0'),
										('0','1','0','1','1','0','1','0'),
										('0','1','1','0','0','1','1','0'),
										('0','1','0','0','0','0','1','0')); 												

CONSTANT X : Screen_Line1 := (('0','1','0','0','0','0','1','0'),
										('0','1','0','0','0','0','1','0'),
										('0','1','1','0','0','1','0','0'),
										('0','0','1','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','1','0','1','1','0','0'),
										('0','1','0','0','0','1','1','0'),
										('0','1','0','0','0','0','1','0')); 					

CONSTANT Y : Screen_Line1 :=(('1','1','1','0','0','0','1','1'),
										('0','1','1','0','0','0','1','0'),
										('0','1','1','0','0','1','0','0'),
										('0','0','1','1','0','1','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','1','1','1','1','0','0')); 									
										
CONSTANT Z : Screen_Line1 := (('0','1','1','1','1','1','1','1'),
										('0','1','0','0','0','0','1','1'),
										('0','0','0','0','0','1','1','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','1','1','0','0','0'),
										('0','0','1','1','0','0','0','0'),
										('0','1','1','0','0','0','0','1'),
										('0','1','1','1','1','1','1','1')); 		
										
CONSTANT N1 : Screen_Line1 :=(('0','0','0','0','0','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','1','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','0','1','1','0','0'),
										('0','0','0','1','1','1','1','0')); 		
										
CONSTANT N2 : Screen_Line1 :=(('0','0','1','1','1','1','0','0'),
										('0','1','0','0','0','1','1','0'),
										('0','1','0','0','0','0','1','0'),