library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity GrayCounter_tb is
end;

architecture bench of GrayCounter_tb is
  -- Clock period
  constant clk_period : time := 10 ns;
  -- Generics
  constant G_Width : integer := 6;
  constant G_InitialValue : integer := 0;
  constant G_ResetValue : integer := 0;
  constant G_CountingDirection : string := "UP";
  constant G_LookAhead : integer := 1;
  -- Ports
  signal I_CLK : std_logic := '0';
  signal I_CE : std_logic := '1';
  signal I_RST : std_logic := '0';
  signal I_CountEnable : std_logic := '1';
  signal O_Value : std_logic_vector(G_Width - 1 downto 0);
  signal O_LookAheadValue : std_logic_vector(G_Width - 1 downto 0);
begin

  GrayCounter_inst : entity work.GrayCounter
  generic map (
    G_Width => G_Width,
    G_InitialValue => G_InitialValue,
    G_ResetValue => G_ResetValue,
    G_CountingDirection => G_CountingDirection,
    G_LookAhead => G_LookAhead
  )
  port map (
    I_CLK => I_CLK,
    I_CE => I_CE,
    I_RST => I_RST,
    I_CountEnable => I_CountEnable,
    O_Value => O_Value,
    O_LAValue => O_LookAheadValue
  );

  I_CLK <= not I_CLK after clk_period/2;

end;