Subversion Repositories xucpu

LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

USE ieee.numeric_std.ALL;

ENTITY S2BOARD_SIM IS

END ENTITY S2BOARD_SIM;

ARCHITECTURE Structural OF S2BOARD_SIM IS

  COMPONENT S2 IS

    PORT (

      CLOCK  : IN  STD_LOGIC;

      RESET  : IN  STD_LOGIC;

      LED    : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);

      SWITCH : IN  STD_LOGIC_VECTOR(7 DOWNTO 0);

      BUTTON : IN  STD_LOGIC_VECTOR(4 DOWNTO 0));

  END COMPONENT S2;

  SIGNAL CLOCK  : STD_LOGIC                    := '0';

  SIGNAL RESET  : STD_LOGIC                    := '0';

  SIGNAL SWITCH : STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0');

  SIGNAL BUTTON : STD_LOGIC_VECTOR(4 DOWNTO 0) := (OTHERS => '0');

  SIGNAL LED    : STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0');

BEGIN  -- ARCHITECTURE Structural

  CLK1 : PROCESS IS

  BEGIN  -- PROCESS CLK1

    CLOCK <= '0';

    WAIT FOR 5 NS;

    CLOCK <= '1';

    WAIT FOR 5 NS;

  END PROCESS CLK1;

  RST1 : PROCESS IS

  BEGIN

    WAIT FOR 23 NS;

    RESET <= '1';

    WAIT FOR 16 NS;

    RESET <= '0';

    WAIT;

  END PROCESS RST1;

  BOARD1 : S2

    PORT MAP (

      CLOCK  => CLOCK,

      RESET  => RESET,

      LED    => LED,

      SWITCH => SWITCH,

      BUTTON => BUTTON);

END ARCHITECTURE Structural;