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keyboard_ctrl_high.vhd

   1  -- keyboard_ctrl.vhd : Keyboard controller
   2  -- Copyright (C) 2006 Brno University of Technology,
   3  --                    Faculty of Information Technology
   4  -- Author(s): Tomas Martinek <martinto AT fit.vutbr.cz>
   5  --
   6  -- LICENSE TERMS
   7  --
   8  -- Redistribution and use in source and binary forms, with or without
   9  -- modification, are permitted provided that the following conditions
  10  -- are met:
  11  -- 1. Redistributions of source code must retain the above copyright
  12  --    notice, this list of conditions and the following disclaimer.
  13  -- 2. Redistributions in binary form must reproduce the above copyright
  14  --    notice, this list of conditions and the following disclaimer in
  15  --    the documentation and/or other materials provided with the
  16  --    distribution.
  17  -- 3. All advertising materials mentioning features or use of this software
  18  --    or firmware must display the following acknowledgement:
  19  --
  20  --      This product includes software developed by the University of
  21  --      Technology, Faculty of Information Technology, Brno and its
  22  --      contributors.
  23  --
  24  -- 4. Neither the name of the Company nor the names of its contributors
  25  --    may be used to endorse or promote products derived from this
  26  --    software without specific prior written permission.
  27  --
  28  -- This software or firmware is provided ``as is'', and any express or implied
  29  -- warranties, including, but not limited to, the implied warranties of
  30  -- merchantability and fitness for a particular purpose are disclaimed.
  31  -- In no event shall the company or contributors be liable for any
  32  -- direct, indirect, incidental, special, exemplary, or consequential
  33  -- damages (including, but not limited to, procurement of substitute
  34  -- goods or services; loss of use, data, or profits; or business
  35  -- interruption) however caused and on any theory of liability, whether
  36  -- in contract, strict liability, or tort (including negligence or
  37  -- otherwise) arising in any way out of the use of this software, even
  38  -- if advised of the possibility of such damage.
  39  --
  40  -- $Id$
  41  --
  42  --
  43  
  44  library IEEE;
  45  use IEEE.STD_LOGIC_1164.ALL;
  46  use IEEE.STD_LOGIC_ARITH.ALL;
  47  use IEEE.STD_LOGIC_UNSIGNED.ALL;
  48  
  49  entity keyboard_controller_high is
  50     generic(
  51          READ_INTERVAL : integer := (2**14)-1
  52     );
  53     port(
  54        -- Hodiny a Reset
  55        CLK        : in std_logic;
  56        RST        : in std_logic;
  57  
  58        -- Stisknute klavesy
  59        DATA_OUT   : out std_logic_vector(15 downto 0);
  60  
  61        -- Signaly klavesnice
  62        KB_KIN     : out std_logic_vector(3 downto 0);
  63        KB_KOUT    : in  std_logic_vector(3 downto 0)
  64     );
  65  end keyboard_controller_high;
  66  
  67  architecture behavioral of keyboard_controller_high is
  68  
  69     signal key_data_out : std_logic_vector(15 downto 0);
  70     signal key_data_vld : std_logic;
  71  
  72  begin
  73  
  74  -- keyboard controller instantion
  75  key_ctrl_u : entity work.keyboard_controller
  76  generic map(
  77     READ_INTERVAL => READ_INTERVAL
  78  )
  79  port map(
  80     CLK        => CLK,
  81     RST        => RST,
  82  
  83     -- Stisknute klavesy
  84     DATA_OUT   => key_data_out,
  85     DATA_VLD   => key_data_vld,
  86  
  87     -- Signaly klavesnice
  88     KB_KIN     => KB_KIN,
  89     KB_KOUT    => KB_KOUT
  90  );
  91  
  92  DATA_OUT(0)  <= key_data_vld and key_data_out(7);
  93  DATA_OUT(1)  <= key_data_vld and key_data_out(0);
  94  DATA_OUT(2)  <= key_data_vld and key_data_out(4);
  95  DATA_OUT(3)  <= key_data_vld and key_data_out(8);
  96  DATA_OUT(4)  <= key_data_vld and key_data_out(1);
  97  DATA_OUT(5)  <= key_data_vld and key_data_out(5);
  98  DATA_OUT(6)  <= key_data_vld and key_data_out(9);
  99  DATA_OUT(7)  <= key_data_vld and key_data_out(2);
 100  DATA_OUT(8)  <= key_data_vld and key_data_out(6);
 101  DATA_OUT(9)  <= key_data_vld and key_data_out(10);
 102  DATA_OUT(10) <= key_data_vld and key_data_out(12);
 103  DATA_OUT(11) <= key_data_vld and key_data_out(13);
 104  DATA_OUT(12) <= key_data_vld and key_data_out(14);
 105  DATA_OUT(13) <= key_data_vld and key_data_out(15);
 106  DATA_OUT(14) <= key_data_vld and key_data_out(3);
 107  DATA_OUT(15) <= key_data_vld and key_data_out(11);
 108  
 109  end behavioral;
 110  
 111