Subversion Repositories pcounter

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use std.textio.all;

entity pcount_tb is

end pcount_tb;

architecture test of pcount_tb is

  component pdchain

    generic (

      n: natural

    );

    port (

      clock: in std_logic;

      en: in std_logic;

      q: out std_logic_vector (n-1 downto 0)

    );

  end component;

  --

  constant T: time := 5 ns;

  signal clock: std_logic := '0';

  signal count: std_logic_vector (23 downto 0);

begin

  pdchain0: pdchain

    generic map (

      n => count'length

    )

    port map (

      clock => clock,

      en => '1',

      q => count

    );

  clk: process

    variable s: line;

  begin

    clock <= '1';

    wait for T/2;

    clock <= '0';

    wait for T/2;

    --

    write(s, to_bitvector(count));

    writeline(output, s);

  end process;

end test;