rename .vhdl to .vhd

1 files changed, 47 insertions, 0 deletions

diff --git a/basys3/basys3.srcs/ppu_pceg_tb.vhd b/basys3/basys3.srcs/ppu_pceg_tb.vhd
new file mode 100644
index 0000000..137d4b4
--- /dev/null
+++ b/basys3/basys3.srcs/ppu_pceg_tb.vhd
@@ -0,0 +1,47 @@
+library ieee;
+library unisim;
+
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use unisim.vcomponents.all;
+
+entity ppu_pceg_tb is
+end ppu_pceg_tb;
+
+architecture behavioral of ppu_pceg_tb is
+	component ppu_pceg port(
+		CLK: in std_logic; -- system clock
+		RESET: in std_logic; -- async reset
+		SPRITE: out std_logic; -- sprite info fetch + sprite pixel fetch
+		COMP_PAL: out std_logic; -- compositor + palette lookup
+		DONE: out std_logic); -- last pipeline stage done
+	end component;
+	signal CLK: std_logic := '0';
+	signal RESET: std_logic := '0';
+	signal SPRITE: std_logic;
+	signal COMP_PAL: std_logic;
+	signal DONE: std_logic;
+
+begin
+	uut: ppu_pceg port map(
+		CLK => CLK,
+		RESET => RESET,
+		SPRITE => SPRITE,
+		COMP_PAL => COMP_PAL,
+		DONE => DONE);
+
+	tb: process
+	begin
+		for i in 0 to 32 loop
+			if i > 20 then
+				RESET <= '1';
+			end if;
+	
+			wait for 5 ns;
+			CLK <= '1';
+			wait for 5 ns;
+			CLK <= '0';
+		end loop;
+		wait; -- stop for simulator
+	end process;
+end;