mor1kx-bemicrocv/bench/bench_sram_wb.vhd

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

library design;
use design.all;

library ip;
use ip.all;
use ip.wishbone_package.all;

entity bench_sram_wb is
end entity bench_sram_wb;

architecture RTL of bench_sram_wb is
	signal clk    : std_logic;
	signal rst    : std_logic;
	signal wb_in  : wishbone_v3_slave_in;
	signal wb_out : wishbone_v3_slave_out;

begin
	sram_wb_inst : entity design.sram_wb
		port map(
			clk    => clk,
			rst    => rst,
			wb_in  => wb_in,
			wb_out => wb_out
		);

	clock_driver : process
		constant period : time := 10 ns;
	begin
		clk <= '0';
		wait for period / 2;
		clk <= '1';
		wait for period / 2;
	end process clock_driver;

	wb_in.CYC <= wb_in.STB;
	test : process is
	begin
		rst       <= '1';
		wb_in.DAT <= (others => '0');
		wb_in.STB <= '0';
		wb_in.SEL <= "1111";
		wb_in.WE  <= '0';
		wb_in.ADR <= (others => '0');
		wait for 20 ns;

		wait until rising_edge(clk);
		rst <= '0';

		wait until rising_edge(clk);
		wait until rising_edge(clk);
		wait until rising_edge(clk);

		--		wb_in.DAT <= x"12345678";
		--		wb_in.WE  <= '1';
		--		wb_in.STB <= '1';
		--		wait until rising_edge(clk);
		--		--wait until rising_edge(wb_out.ACK);
		--		wb_in.STB <= '0';
		--		wait until rising_edge(clk);
		--		wb_in.ADR <= x"00000004";
		--		wb_in.DAT <= x"AABBCCDD";
		--		wb_in.WE  <= '1';
		--		wb_in.STB <= '1';
		--		wait until rising_edge(clk);
		--		--wait until rising_edge(wb_out.ACK);
		--		wb_in.STB <= '0';
		--		wait until rising_edge(clk);
		--		wb_in.ADR <= x"00000004";
		--		wb_in.DAT <= x"FF111111";
		--		wb_in.SEL <= "1000";
		--		wb_in.WE  <= '1';
		--		wb_in.STB <= '1';
		--		wait until rising_edge(clk);
		--		--wait until rising_edge(wb_out.ACK);
		--		wb_in.STB <= '0';
		--		wb_in.SEL <= "1111";
		--		wait until rising_edge(clk);
		--
		--		wait until rising_edge(clk);
		--		wait until rising_edge(clk);
		--		wait until rising_edge(clk);
		--		wb_in.ADR <= x"00000000";
		--		wb_in.DAT <= x"FFFFFFFF";
		--		wb_in.WE  <= '0';
		--		wb_in.STB <= '1';
		--		wait until rising_edge(clk);
		--		wait until rising_edge(wb_out.ACK);
		--		wait until rising_edge(clk);
		--		wb_in.STB <= '0';

		--		wait until rising_edge(clk);
		--		wb_in.DAT <= x"FFFFFFFF";
		--		wb_in.ADR <= x"00000004";
		--		wb_in.WE  <= '0';
		--		wb_in.STB <= '1';
		--		wait until rising_edge(clk);
		--		wait until rising_edge(wb_out.ACK);
		--		wait until rising_edge(clk);
		--		wb_in.STB <= '0';

		for i in 0 to 1000 loop
			wait until rising_edge(clk);
			wb_in.ADR <= std_logic_vector(to_unsigned(i, 30) & "00");
			wb_in.WE  <= '0';
			wb_in.STB <= '1';
			wait until rising_edge(clk);
			wait until rising_edge(wb_out.ACK);
			wait until rising_edge(clk);
			wb_in.STB <= '0';
		end loop;

		wait;
	end process test;

end architecture RTL;