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-- Copyright (c) 2011 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_aes_fsm_enc IS

END tb_aes_fsm_enc;

ARCHITECTURE behavior OF tb_aes_fsm_enc IS

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

    COMPONENT aes_fsm_enc

        port(     clk: in std_logic;

                  rst : in std_logic;

                  block_in : in std_logic_vector(127 downto 0);

                  key : in std_logic_vector(127 downto 0);

                  enc : in std_logic;

                  block_out : out std_logic_vector(127 downto 0);

                  block_ready : out std_logic);

    END COMPONENT;

   --Inputs

   signal clk : std_logic := '0';

   signal rst : std_logic := '0';

   signal block_in : std_logic_vector(127 downto 0) := (others => '0');

   signal key : std_logic_vector(127 downto 0) := (others=> '0');

   signal enc : std_logic := '0';

        --Outputs

   signal block_out : std_logic_vector(127 downto 0);

   signal block_ready : std_logic;

   -- Clock period definitions

   constant clk_period : time := 10 ns;

BEGIN

        -- Instantiate the Unit Under Test (UUT)

   uut: aes_fsm_enc PORT MAP (

          clk => clk,

          rst => rst,

          block_in => block_in,

          key => key,

          enc => enc,

          block_out => block_out,

          block_ready => block_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

                wait for clk_period/2 + clk_period*2;

                rst <= '1';

                wait for clk_period;

                rst <= '0';

                enc <= '1';

                block_in <= X"0f0e0d0c0b0a09080706050403020100";

                key      <= X"0f0e0d0c0b0a09080706050403020100";

                wait for 0.815 us;

                enc <= '0';

                wait for 2 us;

                enc <= '1';

                wait for 0.195 us;

                enc <= '0';

                wait for 1.23 us;

                enc <= '1';

                wait;

   end process;

END;