Main file modified

game_of_life_v2/game_of_life_v2.srcs/sources_1/new/game_of_life.vhd

@@ -58,8 +58,8 @@ port
 end component;
 
 signal clk_25MHz, locked : std_logic;
-signal cells : std_logic_vector(0 to cell_number-1) := (others => '0');
-signal cells_to_draw : std_logic_vector(0 to cell_number-1) := (others => '0');
+signal cells : std_logic_vector(0 to cell_number*cell_number-1) := (511 => '1', 512 => '1', 513 => '1',others => '0');
+signal cells_to_draw : std_logic_vector(0 to cell_number*cell_number-1) := (others => '0');
 
 -- drawing period's constants
 constant HORIZONTAL_SYNC_PULSE : integer := 800;
@@ -96,6 +96,7 @@ clk_gen_25MHz : clk_wiz_0
  );
 
 options : process(clk_25MHz,locked)
+variable neighbour_cnt : unsigned(3 downto 0) := (others=>'0');
 begin
     if locked = '0' then
         horizontal_counter <= (others => '0');
@@ -131,11 +132,45 @@ begin
             end if;
 
             -- handle shift registers
-            if horizontal_counter(9 downto 3) < cell_number and vertical_counter(9 downto 3) < cell_number then
+            if horizontal_counter(9 downto 3) < cell_number+2 and vertical_counter(9 downto 3) < cell_number+2 then
                 shift_register_top <= shift_register_top(1 to cell_number-1) & shift_register_middle(0);
-                shift_register_middle <= shift_register_middle(1 to cell_number-1) & cells(to_integer(vertical_counter(9 downto 3) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)));
-                neighbours <= neighbours(3 to 8) & shift_register_top(0) & shift_register_middle(0) & cells(to_integer(vertical_counter(9 downto 3) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)));
-                -- TODO
+                
+                if horizontal_counter(9 downto 3) /= 0 and horizontal_counter(9 downto 3) < cell_number+1 and vertical_counter(9 downto 3) /= 0 and vertical_counter(9 downto 3) < cell_number+1 then
+                    shift_register_middle <= shift_register_middle(1 to cell_number-1) & cells(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1));
+                    neighbours <= neighbours(3 to 8) & shift_register_top(0) & shift_register_middle(0) & cells(to_integer((vertical_counter(9 downto 3) -1)* to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1));
+                else
+                    shift_register_middle <= shift_register_middle(1 to cell_number-1) & '0';
+                    neighbours <= neighbours(3 to 8) & shift_register_top(0) & shift_register_middle(0) & '0';
+                end if;
+                
+                if vertical_counter(9 downto 3) >= 2 and horizontal_counter(9 downto 3) >= 2 then
+                    neighbour_cnt := (others=>'0');
+                    for i in 0 to 8 loop
+                        if (neighbours(i)) = '1' then
+                            neighbour_cnt := neighbour_cnt+1;
+                        end if;
+                    end loop;
+                    
+                    if neighbours(4)='1' then
+                        if neighbour_cnt = 3 or neighbour_cnt = 4 then
+                            cells(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '1';
+                            cells_to_draw(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '1';
+                        else
+                            cells(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '0';
+                            cells_to_draw(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '0';
+                        end if;
+                    else
+                        if neighbour_cnt = 3 then
+                            cells(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '1';
+                            cells_to_draw(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '1';
+                        else
+                            cells(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '0';
+                            cells_to_draw(to_integer((vertical_counter(9 downto 3)-1) * to_unsigned(cell_number,8) + horizontal_counter(9 downto 3)-1)) <= '0';
+                        end if;
+                    end if;
+                    
+                end if;
+                
             end if;
             
             -- sign options