-- vim: ft=vhdl
library ieee;
library unisim;

use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use unisim.vcomponents.all;
use work.ppu_consts.all;

entity spi_tb is
end spi_tb;

architecture behavioral of spi_tb is
	signal SYSCLK : std_logic := '0';
	signal SPI_CLK : std_logic := '0';
	signal SPI_DATA : std_logic := '0';
	signal RESET : std_logic := '0';
begin
	uut : entity work.spi port map(
		SYSCLK => SYSCLK,
		RESET => RESET,
		DO => open,
		DI => SPI_DATA,
		SR => '0',
		DCK => SPI_CLK,
		WEN => open);

	process
	begin
		while true loop
			wait for 5 ns;
			SYSCLK <= '1';
			wait for 5 ns;
			SYSCLK <= '0';
		end loop;
		wait; -- stop for simulator
	end process;

	process
	begin
		-- -- 0xdc00: 0f0f
SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';
--
SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '0';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

-- 0xffff: ffff
SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';
--
SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

SPI_DATA <= '1';
wait for 50 ns;
SPI_CLK <= '1';
wait for 50 ns;
SPI_CLK <= '0';

 -- m4 macro expansion (see makefile)

		RESET <= '1';
		wait for 50 ns;
		RESET <= '0';
		wait; -- stop for simulator
	end process;
end;