Subversion Repositories fifo_srl_uni

-------------------------------------------------------------------------------

-- Title      : Testbench for fifo_srl_uni.vhd

-- Project    : 

-------------------------------------------------------------------------------

-- File       : tb_fifo_srl_uni_1.vhd

-- Author     : Tomasz Turek  <tomasz.turek@gmail.com>

-- Company    : SzuWar INC

-- Created    : 09:45:13 16-03-2010

-- Last update: 23:36:11 20-03-2010

-- Platform   : Xilinx ISE 10.1.03

-- Standard   : VHDL'93

-------------------------------------------------------------------------------

-- Description: 

-------------------------------------------------------------------------------

-- Copyright (c) 2010 SzuWar INC

-------------------------------------------------------------------------------

-- Revisions  :

-- Date                  Version  Author  Description

-- 09:45:13 16-03-2010   1.0      szuwarek  Created

-------------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

use ieee.std_logic_unsigned.all;

use ieee.numeric_std.all;

entity tb_fifo_srl_uni_1 is

end entity tb_fifo_srl_uni_1;

architecture testbench of tb_fifo_srl_uni_1 is

-------------------------------------------------------------------------------

-- Unit Under Test --

-------------------------------------------------------------------------------

   component fifo_srl_uni is

      generic (

            iDataWidth        : integer range 1 to 32   := 17;

            ififoWidth        : integer range 1 to 1023 := 33;

            iInputReg         : integer range 0 to 2    := 0;

            iOutputReg        : integer range 0 to 3    := 2;

            iFullFlagOfSet    : integer range 0 to 1021 := 2;

            iEmptyFlagOfSet   : integer range 0 to 1021 := 5;

            iSizeDelayCounter : integer range 5 to 11   := 6

            );

      port (

            CLK_I          : in  std_logic;

            DATA_I         : in  std_logic_vector(iDataWidth - 1 downto 0);

            DATA_O         : out std_logic_vector(iDataWidth - 1 downto 0);

            WRITE_ENABLE_I : in  std_logic;

            READ_ENABLE_I  : in  std_logic;

            READ_VALID_O   : out std_logic;

            FIFO_COUNT_O   : out std_logic_vector(iSizeDelayCounter - 1 downto 0);

            FULL_FLAG_O    : out std_logic;

            EMPTY_FLAG_O   : out std_logic

            );

   end component fifo_srl_uni;

-------------------------------------------------------------------------------

-- constants --

-------------------------------------------------------------------------------

   constant iDataWidth        : integer := 16;

   constant ififoWidth        : integer := 8;

   constant iInputReg         : integer := 0;

   constant iOutputReg        : integer := 1;

   constant iFullFlagOfSet    : integer := 0;

   constant iEmptyFlagOfSet   : integer := 0;

   constant iSizeDelayCounter : integer := 5;

   constant iWriteDataCounter : integer := 10;

   constant iReadDataCounter  : integer := 13;

-------------------------------------------------------------------------------

-- signals --

-------------------------------------------------------------------------------

   -- IN --

   signal CLK_I          : std_logic := '0';

   signal WRITE_ENABLE_I : std_logic := '0';

   signal READ_ENABLE_I  : std_logic := '0';

   signal DATA_I         : std_logic_vector(iDataWidth - 1 downto 0) := (others => '0');

   -- OUT --

   signal DATA_O       : std_logic_vector(iDataWidth - 1 downto 0);

   signal READ_VALID_O : std_logic;

   signal FULL_FLAG_O  : std_logic;

   signal EMPTY_FLAG_O : std_logic;

   signal FIFO_COUNT_O : std_logic_vector(iSizeDelayCounter - 1 downto 0);

   -- others --

   signal v_count       : std_logic_vector(15 downto 0) := x"0000";

   signal i_count_write : integer := 0;

   signal i_count_read : integer := 0;

begin  -- architecture testbench

   UUT: fifo_srl_uni

      generic map (

            iDataWidth        => iDataWidth,

            ififoWidth        => ififoWidth,

            iInputReg         => iInputReg,

            iOutputReg        => iOutputReg,

            iFullFlagOfSet    => iFullFlagOfSet,

            iEmptyFlagOfSet   => iEmptyFlagOfSet,

            iSizeDelayCounter => iSizeDelayCounter

            )

      port map(

            CLK_I          => CLK_I,

            DATA_I         => DATA_I,

            DATA_O         => DATA_O,

            WRITE_ENABLE_I => WRITE_ENABLE_I,

            READ_ENABLE_I  => READ_ENABLE_I,

            READ_VALID_O   => READ_VALID_O,

            FIFO_COUNT_O   => FIFO_COUNT_O,

            FULL_FLAG_O    => FULL_FLAG_O,

            EMPTY_FLAG_O   => EMPTY_FLAG_O

            );

   StimulationProcess : process

   begin

      for i in 0 to 1000000 loop

         CLK_I <= not CLK_I;

         wait for 5 ns;

      end loop;

      wait;

   end process StimulationProcess;

   T0: process (CLK_I) is

   begin  -- process T0

      if rising_edge(CLK_I) then

         case v_count is

            when x"0001" =>

               if (iWriteDataCounter + 1) > i_count_write then

                  DATA_I <= DATA_I + 1;

                  WRITE_ENABLE_I <= '1';

                  READ_ENABLE_I <= '0';

                  i_count_write <= i_count_write + 1;

               else

                  v_count <= v_count + 1;

               end if;

            when x"0002" =>

               DATA_I <= x"0000";

               WRITE_ENABLE_I <= '0';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0003" =>

               DATA_I <= x"0010";

               WRITE_ENABLE_I <= '1';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0004" =>

               DATA_I <= x"0200";

               WRITE_ENABLE_I <= '1';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0005" =>

               DATA_I <= x"0100";

               WRITE_ENABLE_I <= '1';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0006" =>

               DATA_I <= x"0000";

               WRITE_ENABLE_I <= '0';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0007" =>

               DATA_I <= x"0000";

               WRITE_ENABLE_I <= '0';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0008" =>

               DATA_I <= x"0000";

               WRITE_ENABLE_I <= '0';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when x"0010" =>

               if (iReadDataCounter + 1) > i_count_read then

                  DATA_I <= DATA_I;

                  WRITE_ENABLE_I <= '0';

                  READ_ENABLE_I <= '1';

                  i_count_read <= i_count_read + 1;

               else

                  v_count <= v_count + 1;

               end if;

            when x"0011" =>

               DATA_I <= x"0000";

               WRITE_ENABLE_I <= '0';

               READ_ENABLE_I <= '0';

               v_count <= v_count + 1;

            when others =>

               WRITE_ENABLE_I <= WRITE_ENABLE_I;

               READ_ENABLE_I <= READ_ENABLE_I;

               v_count <= v_count + 1;

         end case;

      end if;

   end process T0;

end architecture testbench;