------------------------------------------------------ Library----------------------------------------------------library IEEE;use IEEE.std_logic_1164.all ;use IEEE.std_logic_arith.all ;use IEEE.std_logic_unsigned.all ;------------------------------------------------------ entity----------------------------------------------------entity tb_wteam isend tb_wteam;------------------------------------------------------ Architecture----------------------------------------------------architecture TB of tb_wteam is  signal rst_clk             : std_logic := '0';                 -- test clock  signal test_clk            : std_logic := '0';                 -- test clock  signal guest_en            : std_logic := '0';                 --   signal sevice_en           : std_logic := '0';                 --   signal sev_wd_cnt          : std_logic_vector(3 downto 0) := (others => '0'); --component wteam  port (         RST        : in     std_logic;                             CLK        : in     std_logic;                             A          : in     std_logic;                             B          : in     std_logic_vector (3 downto 0);         CH         : out    std_logic_vector (3 downto 0);        CL         : out    std_logic_vector (3 downto 0);        DH         : out    std_logic_vector (3 downto 0);        DL         : out    std_logic_vector (3 downto 0);        FH         : out    std_logic_vector (3 downto 0);        FL         : out    std_logic_vector (3 downto 0);        E          : out    std_logic_vector (3 downto 0)   );end component;begin------------------------------------------------------ reset clock----------------------------------------------------p_rst_clock : processbeginrst_clk <= '0';wait for 20 ns;rst_clk <= '1';wait;end process;------------------------------------------------------ test clock----------------------------------------------------p_test_clock : processbegintest_clk <= '0';wait for 50 ns;test_clk <= '1';wait for 50 ns;end process;------------------------------------------------------ guest en ----------------------------------------------------p_guest_en : processbeginguest_en <= '0';wait for 300 ns;guest_en <= '1';wait for 300 ns;end process;------------------------------------------------------ sevice window en ----------------------------------------------------p_sevice_en : processbeginsevice_en <= '0';wait for 1500 ns;sevice_en <= '1';wait for 1500 ns;end process;p_sev_wd_cnt : process (sevice_en)begin  if (sevice_en'event and sevice_en = '1') then    if (sev_wd_cnt < 9) then      sev_wd_cnt <= sev_wd_cnt + 1;    else      sev_wd_cnt <= (others => '0');    end if;  end if;end process;i_wteam : wteam  port map(             RST        => rst_clk,           CLK        => test_clk,           A          => guest_en,           B          => sev_wd_cnt,           CH         => open,           CL         => open,           DH         => open,           DL         => open,           FH         => open,           FL         => open,           E          => open  );end TB;