-- EE 552 - Project
-- Dustin Demontigny
-- February 11, 2003
-- debouncer3.vhd
-- Debounce mechanism for push buttons
-- uses D-flip flop with enable configuration

library ieee; 
use ieee.std_logic_1164.all; 
use ieee.std_logic_arith.all; 
use ieee.std_logic_unsigned.all; 

use work.smart_eq_pack.all;
                               
entity debouncer3 is
	port(
		signal pb_input : in std_logic_vector(pb_number-1 downto 0);
		signal clock	 : in std_logic;
		signal db_output: out std_logic_vector(pb_number-1 downto 0));
end debouncer3;

architecture DFF of debouncer3 is
begin
  process (clock)
		variable count : integer := 0;
  begin
    	if clock'event and clock = '1' then
			count := count + 1; 				-- counts the number of clock cycles
      	if count = debounce_delay then 		-- when desired delay is reached
				db_output <= pb_input;-- inputs are mapped to outputs
				count := 0; 									-- and counting begins from zero
    		end if;
    	end if;
  end process;
end DFF;