Subversion Repositories opencpu32

--! @file

--! @brief Testbench for OpenCpu top design

--! Use standard library and import the packages (std_logic_1164,std_logic_unsigned,std_logic_arith)

LIBRARY ieee;

use ieee.std_logic_1164.all;

use ieee.std_logic_unsigned.all;

use ieee.std_logic_arith.all;

--! Use CPU Definitions package

use work.pkgOpenCPU32.all;

--! Adding library for File I/O (Synposys Text I/O package)

use std.textio.ALL;

use ieee.std_logic_textio.all;

ENTITY testOpenCpu IS

END testOpenCpu;

--! @brief openCpu Testbench file

--! @details This is the top-level test...

ARCHITECTURE behavior OF testOpenCpu IS

    --! Component declaration to instantiate the Multiplexer circuit                    

    COMPONENT openCpu

    PORT(

         rst : IN  std_logic;

         clk : IN  std_logic;

         mem_rd : OUT  std_logic;

         mem_rd_addr : OUT  std_logic_vector(31 downto 0);

         mem_wr : OUT  std_logic;

         mem_wr_addr : OUT  std_logic_vector(31 downto 0);

         mem_data_in : IN  std_logic_vector(31 downto 0);

         mem_data_out : OUT  std_logic_vector(31 downto 0)

        );

    END COMPONENT;

   --Inputs

   signal rst : std_logic := '0';

   signal clk : std_logic := '0';

   signal mem_data_in : std_logic_vector(31 downto 0) := (others => '0');

        --Outputs

   signal mem_rd : std_logic;

   signal mem_rd_addr : std_logic_vector(31 downto 0);

   signal mem_wr : std_logic;

   signal mem_wr_addr : std_logic_vector(31 downto 0);

   signal mem_data_out : std_logic_vector(31 downto 0);

   -- Clock period definitions

   constant clk_period : time := 10 ns;

BEGIN

        --!Instantiate the Unit Under Test (openCpu) (Doxygen bug if it's not commented!)

   uut: openCpu PORT MAP (

          rst => rst,

          clk => clk,

          mem_rd => mem_rd,

          mem_rd_addr => mem_rd_addr,

          mem_wr => mem_wr,

          mem_wr_addr => mem_wr_addr,

          mem_data_in => mem_data_in,

          mem_data_out => mem_data_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

      -- Reset operation

                REPORT "RESET" SEVERITY NOTE;

                rst <= '1';

      wait for 2 ns;

                rst <= '0';

                wait for 2 ns;

      wait for clk_period*10;

      -- insert stimulus here 

      -- Finish simulation

                assert false report "NONE. End of simulation." severity failure;

                wait;

   end process;

END;