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[/] [c16/] [trunk/] [vhdl/] [cpu_test.vhd] - Rev 31
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-- VHDL Test Bench Created from source file cpu_engine.vhd -- 12:41:11 06/20/2003 -- -- Notes: -- This testbench has been automatically generated using types std_logic and -- std_logic_vector for the ports of the unit under test. Xilinx recommends -- that these types always be used for the top-level I/O of a design in order -- to guarantee that the testbench will bind correctly to the post-implementation -- simulation model. -- LIBRARY ieee; USE ieee.std_logic_1164.ALL; USE ieee.numeric_std.ALL; use work.cpu_pack.ALL; ENTITY testbench IS END testbench; ARCHITECTURE behavior OF testbench IS COMPONENT cpu16 PORT( clk_i : IN std_logic; switch : IN std_logic_vector(9 downto 0); ser_in : IN std_logic; temp_spo : IN std_logic; xm_rdat : IN std_logic_vector(7 downto 0); ser_out : OUT std_logic; temp_spi : OUT std_logic; temp_ce : OUT std_logic; temp_sclk : OUT std_logic; seg1 : OUT std_logic_vector(7 downto 0); seg2 : OUT std_logic_vector(7 downto 0); led : OUT std_logic_vector(7 downto 0); xm_adr : OUT std_logic_vector(15 downto 0); xm_wdat : OUT std_logic_vector(7 downto 0); xm_we : OUT std_logic; xm_ce : OUT std_logic ); END COMPONENT; signal clk_i : std_logic; signal switch : std_logic_vector(9 downto 0) := "0000000000"; signal ser_in : std_logic := '0'; signal temp_spo : std_logic := '0'; signal xm_rdat : std_logic_vector(7 downto 0) := X"33"; signal ser_out : std_logic; signal temp_spi : std_logic := '0'; signal temp_ce : std_logic; signal temp_sclk : std_logic; signal seg1 : std_logic_vector(7 downto 0) := X"00"; signal seg2 : std_logic_vector(7 downto 0) := X"00"; signal led : std_logic_vector(7 downto 0); signal xm_adr : std_logic_vector(15 downto 0); signal xm_wdat : std_logic_vector(7 downto 0); signal xm_we : std_logic; signal xm_ce : std_logic; signal clk_counter : INTEGER := 0; BEGIN uut: cpu16 PORT MAP( clk_i => clk_i, switch => switch, ser_in => ser_in, ser_out => ser_out, temp_spo => temp_spo, temp_spi => temp_spi, temp_ce => temp_ce, temp_sclk => temp_sclk, seg1 => seg1, seg2 => seg2, led => led, xm_adr => xm_adr, xm_rdat => xm_rdat, xm_wdat => xm_wdat, xm_we => xm_we, xm_ce => xm_ce ); -- *** Test Bench - User Defined Section *** PROCESS -- clock process for CLK, BEGIN CLOCK_LOOP : LOOP CLK_I <= transport '0'; WAIT FOR 1 ns; CLK_I <= transport '1'; WAIT FOR 1 ns; WAIT FOR 11 ns; CLK_I <= transport '0'; WAIT FOR 12 ns; END LOOP CLOCK_LOOP; END PROCESS; PROCESS(CLK_I) BEGIN if (rising_edge(CLK_I)) then CLK_COUNTER <= CLK_COUNTER + 1; case CLK_COUNTER is when 0 => switch(9 downto 8) <= "11"; when 1 => switch(9 downto 8) <= "00"; when 1000 => CLK_COUNTER <= 0; ASSERT (FALSE) REPORT "simulation done (no error)" SEVERITY FAILURE; when others => end case; end if; END PROCESS; END;
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