plut,comp en vga

1 files changed, 122 insertions, 0 deletions

diff --git a/basys3/basys3.srcs/ppu_vga_native.vhd b/basys3/basys3.srcs/ppu_vga_native.vhd
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+----------------------------------------------------------------------------------
+-- Company: 
+-- Engineer: 
+-- 
+-- Create Date: 22.02.2023 13:20:47
+-- Design Name: 
+-- Module Name: ppu_vga_native - 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_native is
+ Port (	CLK: in std_logic; -- system clock
+		RESET: in std_logic;
+
+		X: in std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- current screen pixel x
+		Y: in std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y
+		PREADY: in std_logic; -- current pixel ready (pixel color is stable)
+		RI,GI,BI: in std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- VGA color in
+		
+		RO,GO,BO: out std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- VGA color out
+		VSYNC, HSYNC: out std_logic); -- VGA sync outputs
+end ppu_vga_native;
+
+architecture Behavioral of ppu_vga_native is
+  type line_buffer is array(319 downto 0) of std_logic_vector(11 downto 0);
+  signal ram_x0 : line_buffer; -- buffer 0
+  signal ram_x1: line_buffer; -- buffer 1
+  signal hcount: STD_LOGIC_VECTOR(9 downto 0):= (others => '0');
+  signal vcount: STD_LOGIC_VECTOR(9 downto 0):= (others => '0');
+  signal rgb_out :  STD_LOGIC_VECTOR(11 downto 0):= (others => '0'); -- output colors
+  signal px : integer; -- conversion for hcount
+  signal py :integer; -- conversion for vcount
+  signal bufferFilledOnbuffer0 : integer;
+  signal bufferFilledOnbuffer1 :integer;
+begin
+    process (clk, x, y)
+        variable v_x : integer ; -- integer to hold vector X
+    begin
+        if rising_edge(clk) then
+
+              v_x := TO_INTEGER(unsigned(x) - 72);
+              if(v_x >= 0 and v_x < 320 and PREADY = '1') then
+                 if(y(0) = '0') then
+                    ram_x0(v_x) <= RI & GI & BI;
+                    if v_x = 319 then
+                        bufferFilledOnbuffer0 <= TO_INTEGER(unsigned(y) - 14);
+                    end if;
+                else
+                    ram_x1(v_x) <= RI & GI & BI;
+                    if v_x = 319 then
+                        bufferFilledOnbuffer1 <= TO_INTEGER(unsigned(y) - 14);
+                    end if;
+                end if;          
+             end if;     
+            -- T display(display data)     
+            if (hcount >= 144) and (hcount < 784) and (vcount >= 31) and (vcount < 511) then
+                px <= TO_INTEGER(unsigned(hcount) - 144); 
+                py <= TO_INTEGER(unsigned(vcount) - 31);   
+                if(bufferFilledonBuffer0 = (py/2)) then
+                    rgb_out <= ram_x0(px/2);
+                elsif(bufferFilledonbuffer1 = (py/2)) then
+                    rgb_out <= ram_x1(px/2); 
+
+                else
+                    rgb_out <= (others => '0');
+
+                end if;
+            end if;
+            -- pulse width
+            hsync <= '1';
+            if hcount < 97 then
+                hsync <= '0';
+            end if;
+
+            vsync <= '1';
+            if vcount < 3 then
+                vsync <= '0';
+            end if;
+
+            -- sync pulse time
+            hcount <= hcount + 1;
+
+            if hcount = 800 then
+                vcount <= vcount + 1;
+                hcount <= (others => '0');
+            end if;
+
+            if vcount = 521 then
+                vcount <= (others => '0');
+            end if;
+
+        end if;
+        -- output colors
+    RO <= rgb_out(11 downto 8);
+    GO <= rgb_out(7 downto 4);
+    BO <= rgb_out(3 downto 0);
+    end process;
+
+end Behavioral;