list_ch02_03_tb.vhd

来自「VHDL FFT SOURCECODE great one」· VHDL 代码 · 共 49 行

-- Listing 2.3
library ieee; use ieee.std_logic_1164.all;
entity eq2_testbench is
end eq2_testbench;

architecture tb_arch of eq2_testbench is
   signal test_in0, test_in1: std_logic_vector(1 downto 0);
   signal test_out: std_logic;
begin
   -- instantiate the circuit under test
   uut: entity work.eq2(struc_arch)
      port map(a=>test_in0, b=>test_in1, aeqb=>test_out);
   -- test vector generator
   process
   begin
      -- test vector 1
      test_in0 <= "00";
      test_in1 <= "00";
      wait for 200 ns;
      -- test vector 2
      test_in0 <= "01";
      test_in1 <= "00";
      wait for 200 ns;
      -- test vector 3
      test_in0 <= "01";
      test_in1 <= "11";
      wait for 200 ns;
      -- test vector 4
      test_in0 <= "10";
      test_in1 <= "10";
      wait for 200 ns;
      -- test vector 5
      test_in0 <= "10";
      test_in1 <= "00";
      wait for 200 ns;
      -- test vector 6
      test_in0 <= "11";
      test_in1 <= "11";
      wait for 200 ns;
      -- test vector 7
      test_in0 <= "11";
      test_in1 <= "01";
      wait for 200 ns;
      -- terminate simulation
      assert false
         report "Simulation Completed"
         severity failure;
   end process;
end tb_arch;