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

entity debouncer is
    generic( N:integer := 19200000); --19200000
    port
    (
        clk: in std_logic;
        sin: in std_logic;
        output: out std_logic;
        --brj: out integer range 0 to 20000000
    );
end debouncer;

architecture arh of debouncer is
    signal brojac,brojac2: integer range 0 to 20000000;
    signal flag: std_logic;
    begin
        process(clk)
        begin
            if clk='1' then
                if sin='1' then
                    brojac<=0;
                elsif brojac /= N and sin='0' and flag='0' then
                    brojac<=brojac+1;
                elsif brojac=N then
                    flag<='1';
                    brojac<=0;
                end if;
                if flag = '1' then
                    brojac2<=brojac2+1;
                    output<='1';
                end if;
                if brojac2=N then
                    flag<='0';
                    brojac2<=0;
                    output<='0';
                end if;
            end if;
            --brj<=brojac;
        end process;
end arh;