1 files changed, 103 insertions, 0 deletions
diff --git a/basys3/basys3.srcs/ppu_vga_tiny.vhd b/basys3/basys3.srcs/ppu_vga_tiny.vhd
new file mode 100644
index 0000000..f47df48
--- /dev/null
+++ b/basys3/basys3.srcs/ppu_vga_tiny.vhd
@@ -0,0 +1,103 @@
+----------------------------------------------------------------------------------
+-- Company: 
+-- Engineer: 
+-- 
+-- Create Date: 22.02.2023 13:13:03
+-- Design Name: 
+-- Module Name: ppu_vga_tiny - 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;
+use work.ppu_consts.all;
+
+use IEEE.NUMERIC_STD.ALL;
+use IEEE.STD_LOGIC_UNSIGNED.ALL;
+-- Uncomment the following library declaration if instantiating
+-- any Xilinx leaf cells in this code.
+--library UNISIM;
+--use UNISIM.VComponents.all;
+
+entity ppu_vga_tiny is
+  Port ( 
+  		CLK: in std_logic; -- system clock
+		RESET: in std_logic;
+
+		X: out std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- current screen pixel x
+		Y: out std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y
+		
+		VSYNC, VBLANK, 
+		HSYNC, HBLANK: out std_logic); -- VGA sync outputs 
+
+end ppu_vga_tiny;
+
+architecture Behavioral of ppu_vga_tiny is
+  signal hcount: STD_LOGIC_VECTOR(PPU_POS_H_WIDTH-1 downto 0):= (others => '0');
+  signal vcount: STD_LOGIC_VECTOR(PPU_POS_V_WIDTH-1 downto 0):= (others => '0');
+  signal CLKcounter: STD_LOGIC_VECTOR(4 downto 0):= (others => '0');
+  
+begin
+process (CLK) 
+begin
+    if rising_edge(CLK) then
+        CLKcounter <= CLKcounter + 1;
+        if(CLKcounter > 15) then
+            clkCounter <= (others => '0');
+            -- x,y data uit
+            X <= hcount;
+            Y <= vcount;
+             
+            --pulse width
+            if hcount < 32 or hcount >= 320-80 then
+                hsync <= '0';
+            else
+                hsync <= '1';
+            end if;
+        
+            if vcount < 8 or vcount >= 240-15 then
+                vsync <= '0';
+            else
+                vsync <= '1';
+            end if;
+             
+            -- Hblank and Vblank outputs
+            if hcount >= 320-80 then
+                hblank <= '1';
+            else
+                hblank <= '0';
+            end if;
+            
+            if vcount >= 240-15 then
+                vblank <= '1';
+            else
+                vblank <= '0';
+            end if;
+             
+            -- sync pulse time
+            hcount <= hcount + 1;
+             
+            if hcount = 400 then
+                vcount <= vcount + 1;
+                hcount <= (others => '0');
+            end if;
+            
+            if vcount = 255 then	   
+                vcount <= (others => '0');
+            end if;
+        end if;
+    end if;
+end process;
+
+end Behavioral;