--------------------------------------------------------------------------------
-- Copyright (c) 1995-2003 Xilinx, Inc.
-- All Right Reserved.
--------------------------------------------------------------------------------
--   ____  ____ 
--  /   /\/   / 
-- /___/  \  /    Vendor: Xilinx 
-- \   \   \/     Version : 8.1i
--  \   \         Application : ISE
--  /   /         Filename : TB_Hand_Shake.ant
-- /___/   /\     Timestamp : Fri May 19 23:12:34 2006
-- \   \  /  \ 
--  \___\/\___\ 
--
--Command: 
--Design Name: TB_Hand_Shake
--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 TB_Hand_Shake IS
END TB_Hand_Shake;

ARCHITECTURE testbench_arch OF TB_Hand_Shake IS
    FILE RESULTS: TEXT OPEN WRITE_MODE IS "C:\Documents and Settings\People\Desktop\VLSIASS2\TB_Hand_Shake.ano";

    COMPONENT Hand_Shake
        PORT (
            Req : In std_logic;
            Send_Ack : Out std_logic;
            En : Out std_logic;
            Start : Out std_logic;
            Reset : In std_logic;
            Rec_Ack : In std_logic
        );
    END COMPONENT;

    SIGNAL Req : std_logic := '0';
    SIGNAL Send_Ack : std_logic := 'U';
    SIGNAL En : std_logic := 'U';
    SIGNAL Start : std_logic := 'U';
    SIGNAL Reset : std_logic := '1';
    SIGNAL Rec_Ack : std_logic := '0';

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

    BEGIN
        UUT : Hand_Shake
        PORT MAP (
            Req => Req,
            Send_Ack => Send_Ack,
            En => En,
            Start => Start,
            Reset => Reset,
            Rec_Ack => Rec_Ack
        );

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

            PROCEDURE ANNOTATE_Send_Ack(
                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'(", Send_Ack, "));
                IEEE.STD_LOGIC_TEXTIO.write(TX_LOC, Send_Ack);
                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;
            PROCEDURE ANNOTATE_En(
                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'(", En, "));
                IEEE.STD_LOGIC_TEXTIO.write(TX_LOC, En);
                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;
            PROCEDURE ANNOTATE_Start(
                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'(", Start, "));
                IEEE.STD_LOGIC_TEXTIO.write(TX_LOC, Start);
                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_Send_Ack(0);
            ANNOTATE_En(0);
            ANNOTATE_Start(0);
            ANNO_LOOP : LOOP
                WAIT for 50 ns;
                TX_TIME := TX_TIME + 50;
                ANNOTATE_Send_Ack(TX_TIME);
                ANNOTATE_En(TX_TIME);
                ANNOTATE_Start(TX_TIME);
                WAIT for 50 ns;
                TX_TIME := TX_TIME + 50;
            END LOOP ANNO_LOOP;
        END PROCESS;

        PROCESS
            BEGIN
                -- -------------  Current Time:  100ns
                WAIT FOR 100 ns;
                Reset <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  400ns
                WAIT FOR 300 ns;
                Req <= '1';
                Rec_Ack <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  1100ns
                WAIT FOR 700 ns;
                Rec_Ack <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  1800ns
                WAIT FOR 700 ns;
                Req <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  1900ns
                WAIT FOR 100 ns;
                Rec_Ack <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  2600ns
                WAIT FOR 700 ns;
                Rec_Ack <= '0';
                -- -------------------------------------
                -- -------------  Current Time:  3400ns
                WAIT FOR 800 ns;
                Rec_Ack <= '1';
                -- -------------------------------------
                -- -------------  Current Time:  4200ns
                WAIT FOR 800 ns;
                Rec_Ack <= '0';
                -- -------------------------------------
                WAIT FOR 800 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;