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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:                                                  ----

----     Inverse Key update test bench to be sure that it was      ----

---- properly written. As input data, "generated data" by ISE      ----

---- simulator present cipher was used.                            ----

---- 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;

USE ieee.std_logic_unsigned.all;

USE ieee.numeric_std.ALL;

ENTITY keyupd_invTB IS

END keyupd_invTB;

ARCHITECTURE behavior OF keyupd_invTB IS

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

    COMPONENT keyupd_inv

    PORT(

         key : IN  std_logic_vector(79 downto 0);

         num : IN  std_logic_vector(4 downto 0);

         keyout : OUT  std_logic_vector(79 downto 0)--;

                        --clk, reset : std_logic

        );

    END COMPONENT;

   --Inputs

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

   signal num : std_logic_vector(4 downto 0) := (others => '0');

        signal clk : std_logic := '0';

        signal reset : std_logic := '0';

        --Outputs

   signal keyout : std_logic_vector(79 downto 0);

        constant clk_period : time := 1ns;

BEGIN

        -- Instantiate the Unit Under Test (UUT)

   uut: keyupd_inv PORT MAP (

          key => key,

          num => num,

          keyout => keyout--,

                         --clk => clk,

                         --reset => reset

        );

   -- No clocks detected in port list. Replace clk below with 

   -- appropriate port name 

   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

      -- hold reset state for 100ms.

                reset <= '1';

      wait for 100ns;

                reset <='0';

      wait for clk_period;

                key <= "00000000000000000000000000000000000000000000000000000000000000000000000000000000";

                num <= "00001";

                wait for clk_period;

                key <= x"c0000000000000008000";

                num <= "00010";

                wait for clk_period;

                key <= x"50001800000000010000";

                num <= "00011";

                wait for clk_period;

                key <= x"8ba27a0eb8783ac96d59";

                num <= "11111";

                wait for clk_period;

                assert false severity failure;

   end process;

END;