vhdl34
Newbie level 6
im trying to display a red box on a 640 by 480 screen however nothing is
displayed on my vga screen im using nexys 3 and these were the port used
clk v10 ns-n6 vs -p7 red1 -u7 green2 - p8 blue2 -r7 here under is my
code which i made thanks i appriate any help
displayed on my vga screen im using nexys 3 and these were the port used
clk v10 ns-n6 vs -p7 red1 -u7 green2 - p8 blue2 -r7 here under is my
code which i made thanks i appriate any help
Code:
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_misc.all;
use IEEE.std_logic_unsigned.all;
entity vga is
port(clk :in std_logic;
hs : out std_logic;
vs : out std_logic;
red1 : out std_logic;
green2 : out std_logic;
blue2: out std_logic
);
end vga;
Architecture vga_arch of vga is
begin
process(CLK)
variable v :std_logic:= '0';
variable h : std_logic := '1' ;
variable red :std_logic:= '0';
variable green :std_logic:= '0';
variable blue :std_logic:= '0';
variable x : std_logic_vector(9 downto 0) := "0000000000" ;
variable y : std_logic_vector(9 downto 0) := "0000000000" ;
begin
if (CLK'EVENT and CLK = '1') then
if(h = '1') then
x := x+ "0000000001" ;
if(x = "1010000001") then
h:= '0';
v := '1';
x := "0000000000";
end if;
elsif(v = '1') then
y := y + "0000000001";
V:='0';
h:='1';
end if;
if(y = "0111100001") then
y := "0000000000";
end if;
hs <= h;
vs<= v;
red1 <='1';
blue2 <='0';
green2 <='0';
end if;
end process;
end vga_arch;