Subversion Repositories fast-crc

library IEEE;

use IEEE.std_logic_1164.all;

use IEEE.std_logic_arith.all;

-- synopsys synthesis on

library STD;

use STD.TEXTIO.all;

-- synopsys synthesis off

entity CRC_top_tb is end CRC_top_tb;

architecture structural of CRC_top_tb is

component CRC_top

  port (

    phi1    : in    std_logic;

    phi2    : in    std_logic;

    reset   : in    std_logic;

    input   : in    std_logic_vector(15 downto 0);

    fcs_out : out std_logic_vector(31 downto 0));

end component;

signal phi1, phi2, reset : std_logic;

signal input             : std_logic_vector(15 downto 0);

signal fcs_out           : std_logic_vector(31 downto 0);

-- We also specify the files used to get the data and to put the data back

file file_read : text is in "/h/d1/c/x00jn/CRC_generator/data/data_in.dat";

file file_out  : text is out "/h/d1/c/x00jn/CRC_generator/data/data_out.dat";

begin  -- structural

  -- Important: These parameters have been calculated for a 500MHz

  -- relative clock -2 ns per stage-

  p_phi1: process

  begin  -- process p_phi1 

    phi1 <= '1', '0' after 2.1 ns;

    wait for 4.2 ns;

  end process p_phi1;

  p_phi2: process

  begin  -- process p_phi2

    phi2 <= '1', '0' after 0.3 ns, '1' after 1.8 ns;

    wait for 4.2 ns;

  end process p_phi2;

  p_reset: process

  begin  -- process p_reset

    reset <= '0' after 10 ns, '1' after 30 ns;

    wait;

  end process p_reset;

  p_input: process (phi1)

    variable input_file : bit_vector(15 downto 0);

    variable line : line;

  begin  -- process p_input

   if phi1'event and phi1='1' then

    if (not (endfile(file_read))) then

      readline (file_read, line);

      read(line, input_file);

      input <= To_StdLogicVector(input_file);

--      wait for 2 ns;                    -- IMPORTANT!! Modify this to change

--                                        -- the speed of the incoming data!

    end if;

   end if;

  end process p_input;

  p_output: process (phi2)

    variable output_file : bit_vector(31 downto 0);

    variable line : line;

  begin  -- process p_output

    if phi2'event and phi2 = '1' then  -- rising clock edge

      output_file:=To_BitVector(fcs_out);

      write(line,output_file);

      writeline(file_out,line);

    end if;

  end process p_output;

  CRC_1 : CRC_top port map (phi1 => phi1, phi2 => phi2, reset => reset,

                            input => input, fcs_out => fcs_out);

end structural;

configuration cfg_CRC_top_tb_structural of CRC_top_tb is

  for structural

    for CRC_1: CRC_top use entity work.CRC_top(structural); end for;

  end for;

end cfg_CRC_top_tb_structural;