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

----                                                               ----

---- Present - a lightweight block cipher project                  ----

----                                                               ----

---- This file is part of the Present - a lightweight block        ----

---- cipher project                                                ----

---- http://www.http://opencores.org/project,present               ----

----                                                               ----

---- Description:                                                  ----

----     Present key gen test bench - nothing special.             ----

---- To Do:                                                        ----

----                                                               ----

---- Author(s):                                                    ----

---- - Krzysztof Gajewski, gajos@opencores.org                     ----

----                       k.gajewski@gmail.com                    ----

----                                                               ----

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

----                                                               ----

---- Copyright (C) 2013 Authors and OPENCORES.ORG                  ----

----                                                               ----

---- This source file may be used and distributed without          ----

---- restriction provided that this copyright statement is not     ----

---- removed from the file and that any derivative work contains   ----

---- the original copyright notice and the associated disclaimer.  ----

----                                                               ----

---- This source file is free software; you can redistribute it    ----

---- and-or modify it under the terms of the GNU Lesser General    ----

---- Public License as published by the Free Software Foundation;  ----

---- either version 2.1 of the License, or (at your option) any    ----

---- later version.                                                ----

----                                                               ----

---- This source 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 Lesser General Public License for more   ----

---- details.                                                      ----

----                                                               ----

---- You should have received a copy of the GNU Lesser General     ----

---- Public License along with this source; if not, download it    ----

---- from http://www.opencores.org/lgpl.shtml                      ----

----                                                               ----

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

LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

-- Uncomment the following library declaration if using

-- arithmetic functions with Signed or Unsigned values

--USE ieee.numeric_std.ALL;

ENTITY PresentKeyGenTB IS

END PresentKeyGenTB;

ARCHITECTURE behavior OF PresentKeyGenTB IS

    -- Component Declaration for the Unit Under Test (UUT)

    COMPONENT PresentEncKeyGen

    PORT(

         key : IN  std_logic_vector(79 downto 0);

         key_end : OUT  std_logic_vector(79 downto 0);

         start : IN  std_logic;

         clk : IN  std_logic;

         reset : IN  std_logic;

         ready : OUT  std_logic

        );

    END COMPONENT;

   --Inputs

   signal key : std_logic_vector(79 downto 0) := (others => '0');

   signal start : std_logic := '0';

   signal clk : std_logic := '0';

   signal reset : std_logic := '0';

        --Outputs

   signal key_end : std_logic_vector(79 downto 0);

   signal ready : std_logic;

   -- Clock period definitions

   constant clk_period : time := 10 ns;

BEGIN

        -- Instantiate the Unit Under Test (UUT)

   uut: PresentEncKeyGen PORT MAP (

          key => key,

                         key_end => key_end,

          start => start,

          clk => clk,

          reset => reset,

          ready => ready

        );

   -- 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

---- Preparation for test case 1 -----------------

--   key <= x"00000000000000000000";

--   expected_key_end <= x"6dab31744f41d7008759";

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

                reset <= '1';

      start <= '0';

                wait for 100 ns;

                reset <= '0';

                key <= (others => '0');

                start <= '1';

      wait until ready = '1';

                if key_end /= x"6dab31744f41d7008759" then

                        report "RESULT MISMATCH! Test case 1 failed" severity ERROR;

                        assert false severity failure;

                else

                        report "Test case 1 successful" severity note;

                end if;

---- Preparation for test case 2 -----------------

--   key <= x"ffffffffffffffffffff";

--   expected_key_end <= x"fe7a548fb60eb167c511";

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

                start <= '0';

                wait for clk_period;

                key <= (others => '1');

                start <= '1';

      wait until ready = '1';

                if key_end /= x"fe7a548fb60eb167c511" then

                        report "RESULT MISMATCH! Test case 2 failed" severity ERROR;

                        assert false severity failure;

                else

                        report "Test case 2 successful" severity note;

                end if;

---- Preparation for test case 3 -----------------

--   key <= x"00000000000000000000";

--   expected_key_end <= x"6dab31744f41d7008759";

--   same as test case 1

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

                start <= '0';

                wait for clk_period;

                key <= (others => '0');

                start <= '1';

      wait until ready = '1';

                if key_end /= x"6dab31744f41d7008759" then

                        report "RESULT MISMATCH! Test case 3 failed" severity ERROR;

                        assert false severity failure;

                else

                        report "Test case 3 successful" severity note;

                end if;

---- Preparation for test case 4 -----------------

--   key <= x"ffffffffffffffffffff";

--   expected_key_end <= x"fe7a548fb60eb167c511";

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

                start <= '0';

                wait for clk_period;

                key <= (others => '1');

                start <= '1';

      wait until ready = '1';

                if key_end /= x"fe7a548fb60eb167c511" then

                        report "RESULT MISMATCH! Test case 4 failed" severity ERROR;

                        assert false severity failure;

                else

                        report "Test case 4 successful" severity note;

                end if;

                assert false severity failure;

   end process;

END;