ps2.vhd

含有各类寄存器

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;

entity PS2 is
    port ( KBdata: in STD_LOGIC;
           KBCLK:  in STD_LOGIC;
           DOUT:   out STD_LOGIC_VECTOR(7 downto 0);
           CLKIN:  in STD_LOGIC;
           NUM:    buffer std_logic_vector(6 downto 0);
		 	  LDG:	 out std_logic;
		 	  digit:  out std_logic_vector(3 downto 0);
           hs : 	 out std_logic;
           vs : 	 out std_logic;
           r : 	 out std_logic;
           g : 	 out std_logic;
           b : 	 out std_logic;
           rst:    in std_logic );
end PS2;

architecture PS2_arch of PS2 is

--attribute clock_signal: string;
--attribute clock_signal of KBCLK: signal is "yes";
--attribute buffer_type: string;
--attribute buffer_type of KBCLK: signal is "ibuf";

component vga_16 
    Port ( clk : in std_logic;
           hs : out std_logic;
           vs : out std_logic;
           r : out std_logic;
           g : out std_logic;
           b : out std_logic;
		 	  innum  : in std_logic_vector(15 downto 0);
           innum1 : in std_logic_vector(6 downto 0);
           innum2 : in std_logic_vector(6 downto 0);
           innum3 : in std_logic_vector(6 downto 0);
		 	  innum4 : in std_logic_vector(6 downto 0));
end component;

signal test: std_logic;
signal CLK: std_logic;
signal M, S: std_logic_vector(9 downto 0);
signal N2: std_logic_vector(4 downto 0);
signal DREG: std_logic_vector(7 downto 0);
signal LED: std_logic_vector(15 downto 0);
--signal NUM: std_logic_vector(6 downto 0);

begin

LDG<='1';
digit<="1110";

process(CLKIN)
begin
if (RST='1' ) then
		CLK<= '1';
elsif (CLKIN'event and CLKIN='1') then
	if KBCLK='0' then
			CLK <= KBCLK;
	else  
			CLK <= '1';
	end if;
end if;
end process;	
--clk<=kbclk;

process(CLK, KBDATA, S)
begin
if (CLK'event and CLK='0') then
	M <= KBDATA & S(9 DOWNTO 1);
end if;
end process;

process(clk, M, N2, KBdata)
begin
if (CLK'EVENT AND CLK='1') THEN
   S <= M;
end if;
	DOUT <= (S(7 downto 0));
	case S(7 downto 0) is
		when "00010110" => NUM <= "1111001";
	  	when "00011110" => NUM <= "0100100";
	  	when "00100110" => NUM <= "0110000";
	  	when "00100101" => NUM <= "0011001";
	  	when "00101110" => NUM <= "0010010";
	  	when "00110110" => NUM <= "0000010";
	  	when "00111101" => NUM <= "1111000";
		when "00111110" => NUM <= "0000000";
		when "01000110" => NUM <= "0010000";
	  	when "01000101" => NUM <= "1000000";
		when "00011100" => NUM <= "0001000";
		when "00110010" => NUM <= "0000011";
		when "00100001" => NUM <= "1000110";
		when "00100011" => NUM <= "0100001";
		when "00100100" => NUM <= "0000110";
		when "00101011" => NUM <= "0001110";
		when others     => NUM <= "1111111";
	end case;
end process;
LED<="000000" & S(9 downto 0);
U2: vga_16 port map(clkin,hs,vs,r,g,b,LED,NUM,NUM,NUM,NUM);
--test <= not(CLK);

end PS2_arch;