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[/] [gamepads/] [tags/] [rel_0_2_beta/] [snespad/] [bench/] [vhdl/] [tb.vhd] - Rev 3
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------------------------------------------------------------------------------- -- -- Testbench for the -- SNESpad controller core -- -- $Id: tb.vhd,v 1.1 2004-10-05 17:05:31 arniml Exp $ -- -- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org) -- -- All rights reserved -- -- Redistribution and use in source and synthezised forms, with or without -- modification, are permitted provided that the following conditions are met: -- -- Redistributions of source code must retain the above copyright notice, -- this list of conditions and the following disclaimer. -- -- Redistributions in synthesized form must reproduce the above copyright -- notice, this list of conditions and the following disclaimer in the -- documentation and/or other materials provided with the distribution. -- -- Neither the name of the author nor the names of other contributors may -- be used to endorse or promote products derived from this software without -- specific prior written permission. -- -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, -- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE -- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -- POSSIBILITY OF SUCH DAMAGE. -- -- Please report bugs to the author, but before you do so, please -- make sure that this is not a derivative work and that -- you have the latest version of this file. -- -- The latest version of this file can be found at: -- http://www.opencores.org/cvsweb.shtml/gamepads/ -- -- The project homepage is located at: -- http://www.opencores.org/projects.cgi/web/gamepads/overview -- ------------------------------------------------------------------------------- library ieee; use ieee.std_logic_1164.all; entity tb is end tb; use work.snespad_pack.all; architecture behav of tb is constant period_c : time := 100 ns; constant num_pads_c : natural := 2; constant reset_level_c : natural := 0; constant button_level_c : natural := 0; component snespad generic ( num_pads_g : natural := 1; reset_level_g : natural := 0; button_level_g : natural := 0; clocks_per_6us_g : natural := 6 ); port ( clk_i : in std_logic; reset_i : in std_logic; pad_clk_o : out std_logic; pad_latch_o : out std_logic; pad_data_i : in std_logic_vector(num_pads_g-1 downto 0); but_a_o : out std_logic_vector(num_pads_g-1 downto 0); but_b_o : out std_logic_vector(num_pads_g-1 downto 0); but_x_o : out std_logic_vector(num_pads_g-1 downto 0); but_y_o : out std_logic_vector(num_pads_g-1 downto 0); but_start_o : out std_logic_vector(num_pads_g-1 downto 0); but_sel_o : out std_logic_vector(num_pads_g-1 downto 0); but_tl_o : out std_logic_vector(num_pads_g-1 downto 0); but_tr_o : out std_logic_vector(num_pads_g-1 downto 0); but_up_o : out std_logic_vector(num_pads_g-1 downto 0); but_down_o : out std_logic_vector(num_pads_g-1 downto 0); but_left_o : out std_logic_vector(num_pads_g-1 downto 0); but_right_o : out std_logic_vector(num_pads_g-1 downto 0) ); end component snespad; signal clk_s : std_logic; signal reset_s : std_logic; signal pad_clk_s : std_logic; signal pad_latch_s : std_logic; signal pad_data_s : std_logic_vector(num_pads_c-1 downto 0); type buttons_t is array (11 downto 0) of std_logic_vector(num_pads_c-1 downto 0); signal buttons_s : buttons_t; signal buttons0_s, buttons1_s : std_logic_vector(11 downto 0); begin dut : snespad generic map ( num_pads_g => 2, reset_level_g => reset_level_c, button_level_g => button_level_c, clocks_per_6us_g => 60 ) port map ( clk_i => clk_s, reset_i => reset_s, pad_clk_o => pad_clk_s, pad_latch_o => pad_latch_s, pad_data_i => pad_data_s, but_a_o => buttons_s(but_pos_a_c), but_b_o => buttons_s(but_pos_b_c), but_x_o => buttons_s(but_pos_x_c), but_y_o => buttons_s(but_pos_y_c), but_start_o => buttons_s(but_pos_start_c), but_sel_o => buttons_s(but_pos_sel_c), but_tl_o => buttons_s(but_pos_tl_c), but_tr_o => buttons_s(but_pos_tr_c), but_up_o => buttons_s(but_pos_up_c), but_down_o => buttons_s(but_pos_down_c), but_left_o => buttons_s(but_pos_left_c), but_right_o => buttons_s(but_pos_right_c) ); buttons: process (buttons_s) begin for i in 0 to 11 loop buttons0_s(i) <= buttons_s(i)(0); buttons1_s(i) <= buttons_s(i)(1); end loop; end process buttons; ----------------------------------------------------------------------------- -- DUT Stimuli ----------------------------------------------------------------------------- stimuli: process procedure dispatch(pad : in natural; packet : in std_logic_vector(11 downto 0)) is begin wait until pad_latch_s = '0'; for i in 11 downto 0 loop wait until pad_clk_s = '0'; pad_data_s(pad) <= packet(i); wait until pad_clk_s = '1'; end loop; wait for period_c; assert pad_latch_s = '1' report "Latch not deasserted!" severity error; wait for period_c; for i in 11 downto 0 loop assert button_active_f(buttons_s(i)(pad), button_level_c) = packet(i) report "Mismatch for received vs. sent buttons!" severity error; end loop; end dispatch; begin pad_data_s <= (others => '1'); wait until reset_s = '1'; wait for period_c * 4; for pad in 0 to 1 loop dispatch(pad, packet => "000000000000"); dispatch(pad, packet => "111111111111"); dispatch(pad, packet => "010101010101"); dispatch(pad, packet => "101010101010"); dispatch(pad, packet => "100000000000"); dispatch(pad, packet => "010000000000"); dispatch(pad, packet => "001000000000"); dispatch(pad, packet => "000100000000"); dispatch(pad, packet => "000010000000"); dispatch(pad, packet => "000001000000"); dispatch(pad, packet => "000000100000"); dispatch(pad, packet => "000000010000"); dispatch(pad, packet => "000000001000"); dispatch(pad, packet => "000000000100"); dispatch(pad, packet => "000000000010"); dispatch(pad, packet => "000000000001"); end loop; wait for period_c * 4; assert false report "End of simulation reached." severity failure; end process stimuli; ----------------------------------------------------------------------------- -- Clock Generator ----------------------------------------------------------------------------- clk: process begin clk_s <= '0'; wait for period_c / 2; clk_s <= '1'; wait for period_c / 2; end process clk; ----------------------------------------------------------------------------- -- Reset Generator ----------------------------------------------------------------------------- reset: process begin if reset_level_c = 0 then reset_s <= '0'; else reset_s <= '1'; end if; wait for period_c * 4 + 10 ns; reset_s <= not reset_s; wait; end process reset; end behav; ------------------------------------------------------------------------------- -- File History: -- -- $Log: not supported by cvs2svn $ -------------------------------------------------------------------------------
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