X Counter Tester

It is designed to allow you to test X recorders before placing them in the field to gather important data. With it you can identify potential problems before they occur, saving time and money.

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.STD_LOGIC_ARITH.ALL;

use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity counter is

generic

(

data_width : positive := 32

);

port

(

clk : in std_logic;

rst_n : in std_logic;

start : in std_logic;

count : out std_logic_vector (data_width - 1 downto 0)

);

end counter;

architecture Behavioral of counter is

signal start_r,start_r2 : std_logic;

signal count_i : std_logic_vector (data_width - 1 downto 0);

begin

process (clk, rst_n)

begin

if (rising_edge(clk)) then

if(rst_n = '0') then

start_r <= '0';

start_r2 <= '0';

count_i <= (others => '0');

else

start_r <= start;

start_r2 <= start_r;

if(start_r = '1' and start_r2 = '0') then

count_i <= (others => '0');

elsif(start_r = '1') then

count_i <= count_i + '1';

end if;

end if;

end if;

end process;

count <= count_i;

end Behavioral;