added one hertz clock

clock for cells

game_of_life/game_of_life.srcs/sources_1/new/one_second_clock.vhd

+----------------------------------------------------------------------------------
+-- Company: 
+-- Engineer: 
+-- 
+-- Create Date: 11/26/2018 02:20:05 PM
+-- Design Name: 
+-- Module Name: one_second_clock - Behavioral
+-- Project Name: 
+-- Target Devices: 
+-- Tool Versions: 
+-- Description: 
+-- 
+-- Dependencies: 
+-- 
+-- Revision:
+-- Revision 0.01 - File Created
+-- Additional Comments:
+-- 
+----------------------------------------------------------------------------------
+
+
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+-- Uncomment the following library declaration if using
+-- arithmetic functions with Signed or Unsigned values
+use IEEE.NUMERIC_STD.ALL;
+
+-- Uncomment the following library declaration if instantiating
+-- any Xilinx leaf cells in this code.
+--library UNISIM;
+--use UNISIM.VComponents.all;
+
+entity one_second_clock is
+    Port ( clock_in : in STD_LOGIC;
+           locked : in STD_LOGIC;
+           clock_out : out STD_LOGIC);
+end one_second_clock;
+
+architecture Behavioral of one_second_clock is
+
+signal counter : unsigned(13 downto 0);
+signal clock_out_sig : std_logic := '0';
+
+begin
+
+clk_gen : process(clock_in)
+begin
+    if clock_in'event and clock_in = '1' and locked = '1' then
+        if counter = 12499 then
+            counter <= (others => '0');
+            clock_out_sig <= not clock_out_sig;
+        else
+            counter <= counter + 1;
+        end if;
+    end if;
+end process;
+
+clock_out <= clock_out_sig;
+
+end Behavioral;

game_of_life/game_of_life.xpr

@@ -63,6 +63,13 @@
           <Attr Name="UsedIn" Val="simulation"/>
         </FileInfo>
       </File>
+      <File Path="$PSRCDIR/sources_1/new/one_second_clock.vhd">
+        <FileInfo>
+          <Attr Name="AutoDisabled" Val="1"/>
+          <Attr Name="UsedIn" Val="synthesis"/>
+          <Attr Name="UsedIn" Val="simulation"/>
+        </FileInfo>
+      </File>
       <Config>
         <Option Name="DesignMode" Val="RTL"/>
         <Option Name="TopModule" Val="game_of_life"/>