Subversion Repositories gamepads

-------------------------------------------------------------------------------

--

-- SNESpad controller core

--

-- $Id: snespad.vhd 41 2009-04-01 19:58:04Z arniml $

--

-- 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 snespad is

  generic (

    -- number of pads connected to this core

    num_pads_g       :     natural := 1;

    -- active level of reset_i

    reset_level_g    :     natural := 0;

    -- active level of the button outputs

    button_level_g   :     natural := 0;

    -- number of clk_i periods during 6us

    clocks_per_6us_g :     natural := 6

  );

  port (

    -- System Interface -------------------------------------------------------

    clk_i            : in  std_logic;

    reset_i          : in  std_logic;

    -- Gamepad Interface ------------------------------------------------------

    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);

    -- Buttons Interface ------------------------------------------------------

    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 snespad;

architecture struct of snespad is

  component snespad_ctrl

    generic (

      reset_level_g    :     natural := 0;

      clocks_per_6us_g :     natural := 6

    );

    port (

      clk_i            : in  std_logic;

      reset_i          : in  std_logic;

      clk_en_o         : out boolean;

      shift_buttons_o  : out boolean;

      save_buttons_o   : out boolean;

      pad_clk_o        : out std_logic;

      pad_latch_o      : out std_logic

    );

  end component snespad_ctrl;

  component snespad_pad

    generic (

      reset_level_g   :     natural := 0;

      button_level_g  :     natural := 0

    );

    port (

      clk_i           : in  std_logic;

      reset_i         : in  std_logic;

      clk_en_i        : in  boolean;

      shift_buttons_i : in  boolean;

      save_buttons_i  : in  boolean;

      pad_data_i      : in  std_logic;

      but_a_o         : out std_logic;

      but_b_o         : out std_logic;

      but_x_o         : out std_logic;

      but_y_o         : out std_logic;

      but_start_o     : out std_logic;

      but_sel_o       : out std_logic;

      but_tl_o        : out std_logic;

      but_tr_o        : out std_logic;

      but_up_o        : out std_logic;

      but_down_o      : out std_logic;

      but_left_o      : out std_logic;

      but_right_o     : out std_logic

    );

  end component snespad_pad;

  signal clk_en_s : boolean;

  signal shift_buttons_s : boolean;

  signal save_buttons_s : boolean;

begin

  ctrl_b : snespad_ctrl

    generic map (

      reset_level_g    => reset_level_g,

      clocks_per_6us_g => clocks_per_6us_g

    )

    port map (

      clk_i            => clk_i,

      reset_i          => reset_i,

      clk_en_o         => clk_en_s,

      shift_buttons_o  => shift_buttons_s,

      save_buttons_o   => save_buttons_s,

      pad_clk_o        => pad_clk_o,

      pad_latch_o      => pad_latch_o

    );

  pads: for i in 0 to num_pads_g-1 generate

    pad_b : snespad_pad

      generic map (

        reset_level_g   => reset_level_g,

        button_level_g  => button_level_g

      )

      port map (

        clk_i           => clk_i,

        reset_i         => reset_i,

        clk_en_i        => clk_en_s,

        shift_buttons_i => shift_buttons_s,

        save_buttons_i  => save_buttons_s,

        pad_data_i      => pad_data_i(i),

        but_a_o         => but_a_o(i),

        but_b_o         => but_b_o(i),

        but_x_o         => but_x_o(i),

        but_y_o         => but_y_o(i),

        but_start_o     => but_start_o(i),

        but_sel_o       => but_sel_o(i),

        but_tl_o        => but_tl_o(i),

        but_tr_o        => but_tr_o(i),

        but_up_o        => but_up_o(i),

        but_down_o      => but_down_o(i),

        but_left_o      => but_left_o(i),

        but_right_o     => but_right_o(i)

      );

  end generate;

end struct;