ppu_dispctl test for valid VGA signal using DMT 640x480 @ 60

1 files changed, 45 insertions, 0 deletions

diff --git a/basys3/basys3.srcs/ppu_dispctl_demo_top.vhd b/basys3/basys3.srcs/ppu_dispctl_demo_top.vhd
new file mode 100644
index 0000000..c4fa6b8
--- /dev/null
+++ b/basys3/basys3.srcs/ppu_dispctl_demo_top.vhd
@@ -0,0 +1,45 @@
+library ieee;
+library work;
+
+use ieee.std_logic_1164.all;
+use work.ppu_consts.all;
+
+entity ppu_dispctl_demo is port(
+	CLK100 : in std_logic; -- system clock
+	RESET : in std_logic; -- global (async) system reset
+	R,G,B : out std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0);
+	VSYNC, HSYNC : out std_logic); -- vblank for synchronization
+end ppu_dispctl_demo;
+
+architecture Behavioral of ppu_dispctl_demo is
+	component ppu_dispctl port( -- display controller
+		CLK : in std_logic; -- system clock
+		RESET : in std_logic;
+
+		X : out std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- tiny screen pixel x
+		Y : out std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- tiny screen pixel y
+		RI,GI,BI : in std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- color in
+		PREADY : in std_logic; -- current pixel ready (pixel color is stable)
+
+		RO,GO,BO : out std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- VGA color out
+		NVSYNC, NHSYNC : out std_logic; -- VGA sync out
+		THBLANK, TVBLANK : out std_logic); -- tiny sync signals
+	end component;
+begin
+	display_controller : component ppu_dispctl port map(
+		CLK => CLK100,
+		RESET => RESET,
+		PREADY => '1',
+		X => open,
+		Y => open,
+		RI => (others => '1'),
+		GI => (others => '0'),
+		BI => (others => '1'),
+		RO => R,
+		GO => G,
+		BO => B,
+		NVSYNC => VSYNC,
+		NHSYNC => HSYNC,
+		TVBLANK => open,
+		THBLANK => open);
+end Behavioral;