decoder24_tbw.ant

本程序以XILINX公司的ISE８.２为开发平台

--------------------------------------------------------------------------------
-- Copyright (c) 1995-2003 Xilinx, Inc.
-- All Right Reserved.
--------------------------------------------------------------------------------
--   ____  ____ 
--  /   /\/   / 
-- /___/  \  /    Vendor: Xilinx 
-- \   \   \/     Version : 8.2i
--  \   \         Application : ISE
--  /   /         Filename : decoder24_tbw.ant
-- /___/   /\     Timestamp : Wed Jun 13 16:07:06 2007
-- \   \  /  \ 
--  \___\/\___\ 
--
--Command: 
--Design Name: decoder24_tbw
--Device: Xilinx
--

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
USE IEEE.STD_LOGIC_TEXTIO.ALL;
USE STD.TEXTIO.ALL;

ENTITY decoder24_tbw IS
END decoder24_tbw;

ARCHITECTURE testbench_arch OF decoder24_tbw IS
    FILE RESULTS: TEXT OPEN WRITE_MODE IS "E:\MY_DESIGN\ISE\LXJ\decoder24\decoder24_tbw.ano";

    COMPONENT decoder24
        PORT (
            a1 : In std_logic;
            a0 : In std_logic;
            y : Out std_logic_vector (3 DownTo 0)
        );
    END COMPONENT;

    SIGNAL a1 : std_logic := '0';
    SIGNAL a0 : std_logic := '0';
    SIGNAL y : std_logic_vector (3 DownTo 0) := "0001";

    SHARED VARIABLE TX_ERROR : INTEGER := 0;
    SHARED VARIABLE TX_OUT : LINE;

    BEGIN
        UUT : decoder24
        PORT MAP (
            a1 => a1,
            a0 => a0,
            y => y
        );

        PROCESS    -- Annotation process
            VARIABLE TX_TIME : INTEGER := 0;

            PROCEDURE ANNOTATE_y(
                TX_TIME : INTEGER
            ) IS
                VARIABLE TX_STR : String(1 to 4096);
                VARIABLE TX_LOC : LINE;
            BEGIN
                STD.TEXTIO.write(TX_LOC, string'("Annotate["));
                STD.TEXTIO.write(TX_LOC, TX_TIME);
                STD.TEXTIO.write(TX_LOC, string'(", y, "));
                IEEE.STD_LOGIC_TEXTIO.write(TX_LOC, y);
                STD.TEXTIO.write(TX_LOC, string'("]"));
                TX_STR(TX_LOC.all'range) := TX_LOC.all;
                STD.TEXTIO.writeline(RESULTS, TX_LOC);
                STD.TEXTIO.Deallocate(TX_LOC);
            END;
        BEGIN
            WAIT for 1 fs;
            ANNOTATE_y(0);
            ANNO_LOOP : LOOP
                WAIT for 50 ns;
                TX_TIME := TX_TIME + 50;
                ANNOTATE_y(TX_TIME);
                WAIT for 50 ns;
                TX_TIME := TX_TIME + 50;
            END LOOP ANNO_LOOP;
        END PROCESS;

        PROCESS
            BEGIN
                -- -------------  Current Time:  200ns
                WAIT FOR 200 ns;
                a0 <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  300ns
                WAIT FOR 100 ns;
                a1 <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  400ns
                WAIT FOR 100 ns;
                a1 <= '0';
                a0 <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  500ns
                WAIT FOR 100 ns;
                a1 <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  600ns
                WAIT FOR 100 ns;
                a1 <= '0';
                a0 <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  700ns
                WAIT FOR 100 ns;
                a1 <= '1';
                a0 <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  800ns
                WAIT FOR 100 ns;
                a1 <= '0';
                a0 <= '1';
                -- -------------------------------------
                WAIT FOR 200 ns;

                STD.TEXTIO.write(TX_OUT, string'("Total[]"));
                STD.TEXTIO.writeline(RESULTS, TX_OUT);
                ASSERT (FALSE) REPORT
                    "Success! Simulation for annotation completed"
                    SEVERITY FAILURE;
            END PROCESS;

    END testbench_arch;