Subversion Repositories scarts

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

-- This file is part of SCARTS.

-- 

-- SCARTS is free software: you can redistribute it and/or modify

-- it under the terms of the GNU General Public License as published by

-- the Free Software Foundation, either version 3 of the License, or

-- (at your option) any later version.

-- 

-- SCARTS is distributed in the hope that it will be useful,

-- but WITHOUT ANY WARRANTY; without even the implied warranty of

-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-- GNU General Public License for more details.

-- 

-- You should have received a copy of the GNU General Public License

-- along with SCARTS.  If not, see <http://www.gnu.org/licenses/>.

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

library ieee;

use ieee.std_logic_1164.all;

use work.math_pkg.all;

package key_matrix_pkg is

  component key_matrix is

    generic

    (

      CLK_FREQ           : integer range 1 to integer'high;

      SCAN_TIME_INTERVAL : time range 1 ms to 100 ms;

      DEBOUNCE_TIMEOUT   : time range 100 us to 1 ms;

      SYNC_STAGES        : integer range 2 to integer'high;

      COLUMN_COUNT       : integer range 1 to integer'high;

      ROW_COUNT          : integer range 1 to integer'high

    );

    port

    (

      sys_clk   : in  std_logic;

      sys_res_n : in  std_logic;

      columns   : out std_logic_vector(COLUMN_COUNT - 1 downto 0);

      rows      : in  std_logic_vector(ROW_COUNT - 1 downto 0);

      key       : out std_logic_vector(log2c(ROW_COUNT * COLUMN_COUNT) - 1 downto 0)

    );

  end component key_matrix;

end package key_matrix_pkg;