TOPPER - other guys code.,

TOPPER.vhd

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.lab4package.all;

entity lab4top is
port(
	-- input
	top_clk: in std_logic;
	switches : in std_logic_vector(2 downto 0);
	buttons : in std_logic_vector (3 downto 0);
	-- output
	top_rgb : out std_logic_vector(2 downto 0);
	top_HS, top_VS: out std_logic;
	top_last_column: out std_logic;
	top_last_row: out std_logic
);
end lab4top;

architecture colorBarTest of lab4top is

signal top_pixel_en: std_logic; -- TOGGLE Circuit Component

signal reset : std_logic := '1';
signal t_pixel_x: unsigned (9 downto 0);
signal t_pixel_y: unsigned (9 downto 0);		
signal top_blank : std_logic:='0';

-- register signals for HS, VS and RGB
signal temp_HS : std_logic := '1';
signal temp_VS : std_logic := '1';
signal temp_rgb : std_logic_vector(2 downto 0) := "000";

--HORIZONTAL COLOR BAR 
signal rgb_H: std_logic_vector(2 downto 0);
constant H1: integer:=79; --Black
constant H2: integer := 159; --Blue
constant H3 : integer := 239; -- Green
constant H4 : integer := 319; -- Cyan
constant H5 : integer := 399; -- Red
constant H6 : integer :=479; -- Magenta
constant H7 : integer := 559; -- Yellow
constant H8 : integer := 639; --White

-- VERTICAL COLOR BAR
signal rgb_V: std_logic_vector(2 downto 0);
constant V1: integer:=59; --Black
constant V2: integer := 119; --Blue
constant V3 : integer := 179; -- Green
constant V4 : integer := 239; -- Cyan
constant V5 : integer := 299; -- Red
constant V6 : integer :=359; -- Magenta
constant V7 : integer := 419; -- Yellow
constant V8 : integer := 479; --White

	
begin
	
	-- Horizontal Colors based on pixel_x
	rgb_H<=	"000" when (t_pixel_x<=H1) else
			"001" when (t_pixel_x>H1 and t_pixel_x<=H2) else
			"010" when (t_pixel_x>H2 and t_pixel_x<=H3) else
			"011" when (t_pixel_x>H3 and t_pixel_x<=H4) else
			"100" when (t_pixel_x>H4 and t_pixel_x<=H5) else
			"101" when (t_pixel_x>H5 and t_pixel_x<=H6) else
			"110" when (t_pixel_x>H6 and t_pixel_x<=H7) else
			"111" when (t_pixel_x>H7 and t_pixel_x<=H8) else
			"000";


	--Vertical Colors based on pixel_y  		  
	rgb_V<=	"000" when (t_pixel_y<=V1)else 
			"001" when (t_pixel_y>V1 and t_pixel_y<=V2) else
			"010" when (t_pixel_y>V2 and t_pixel_y<=V3) else
			"011" when (t_pixel_y>V3 and t_pixel_y<=V4) else
			"100" when (t_pixel_y>V4 and t_pixel_y<=V5) else
			"101" when (t_pixel_y>V5 and t_pixel_y<=V6) else
			"110" when (t_pixel_y>V6 and t_pixel_y<=V7) else
			"111" when (t_pixel_y>V7 and t_pixel_y<=V8) else
			"000";
  		   
  		  
	-- the pixel_en and the reset signal
	process(top_clk)
   	begin
   		if(top_clk'event and top_clk='1')then
       		top_pixel_en<=not(top_pixel_en);
       		reset<='0';
   		end if;
	end process;

	
		
	temp_rgb<="000" when (buttons="0001" or top_blank='1') else
			switches when (buttons="0010") else
			rgb_V when (buttons="0100") else
			rgb_H when (buttons="1000") else
			"100";
			 
	process(top_clk, reset)
	begin
	  if(reset='1') then
	    top_HS <= '1';
	    top_VS <='1';
	    top_rgb<="000";
	  elsif(top_clk'event and top_clk='1')then 
	    top_HS<= temp_HS;
	    top_VS<=temp_VS;
	    top_rgb<=temp_rgb;
	   end if;
	end process;
		
		
	-- component instatiation
	CBT:vgaTiming
	port map(
		clk=>top_clk,
		rst=>reset,
		pixel_en => top_pixel_en,
		HS=>temp_HS,
		VS=>temp_VS,
		last_row=>top_last_row,
		last_column=>top_last_column,
		blank=>top_blank,
		pixel_x=>t_pixel_x,
		pixel_y=>t_pixel_y
	);
end colorBarTest;