Subversion Repositories descore

 
-- Copyright (c) 2013 Antonio de la Piedra
 
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
 
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
 
-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
 
 ENTITY tb_des_loop IS
END tb_des_loop;
 
ARCHITECTURE behavior OF tb_des_loop IS 
 
    -- Component Declaration for the Unit Under Test (UUT)
 
    COMPONENT des_loop
    PORT(
         clk : IN  std_logic;
         rst : IN  std_logic;
         mode : IN  std_logic;
         key_in : IN  std_logic_vector(63 downto 0);
         blk_in : IN  std_logic_vector(63 downto 0);
         blk_out : OUT  std_logic_vector(63 downto 0)
        );
    END COMPONENT;
 
 
   --Inputs
   signal clk : std_logic := '0';
   signal rst : std_logic := '0';
   signal mode : std_logic := '0';
   signal key_in : std_logic_vector(63 downto 0) := (others => '0');
   signal blk_in : std_logic_vector(63 downto 0) := (others => '0');
 
 	--Outputs
   signal blk_out : std_logic_vector(63 downto 0);
 
   -- Clock period definitions
   constant clk_period : time := 10 ns;
 
BEGIN
 
	-- Instantiate the Unit Under Test (UUT)
   uut: des_loop PORT MAP (
          clk => clk,
          rst => rst,
          mode => mode,
          key_in => key_in,
          blk_in => blk_in,
          blk_out => blk_out
        );
 
   -- Clock process definitions
   clk_process :process
   begin
		clk <= '0';
		wait for clk_period/2;
		clk <= '1';
		wait for clk_period/2;
   end process;
 
 
   -- Stimulus process
   stim_proc: process
   begin		
		wait for clk_period/2 + clk_period;
		mode <= '0';
		blk_in <= X"4E45565251554954";
		key_in <= X"4B41534849534142";
		rst <= '1';
		wait for clk_period;
		rst <= '0';
      wait for clk_period*16;
 
		assert blk_out = X"763549D38B570C0E"
			report "ENCRYPT ERROR" severity FAILURE;
 
		wait for clk_period;
 
		mode <= '1';
		blk_in <=  X"763549D38B570C0E";
		key_in <=  X"4B41534849534142";
		rst <= '1';
		wait for clk_period;
		rst <= '0';
      wait for clk_period*16;		
 
		assert blk_out = X"4E45565251554954"
			report "DECRYPT ERROR" severity FAILURE;
 
      wait;
   end process;
 
END;