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entity tb_sram02 is
end tb_sram02;
library ieee;
use ieee.std_logic_1164.all;
architecture behav of tb_sram02 is
signal addr : std_logic_vector(3 downto 0);
signal rdat : std_logic_vector(7 downto 0);
signal wdat : std_logic_vector(7 downto 0);
signal wen : std_logic;
signal clk : std_logic;
begin
dut: entity work.sram02
port map (clk_i => clk, addr_i => addr, data_i => wdat, data_o => rdat,
wen_i => wen);
process
procedure pulse is
begin
clk <= '0';
wait for 1 ns;
clk <= '1';
wait for 1 ns;
end pulse;
begin
addr <= "0000";
wdat <= x"02";
wen <= '1';
pulse;
assert rdat = x"02" severity failure;
addr <= "0100";
wdat <= x"03";
wait for 1 ns;
assert rdat = x"02" severity failure;
pulse;
assert rdat = x"03" severity failure;
addr <= "0000";
wen <= '0';
pulse;
assert rdat = x"02" severity failure;
wait;
end process;
end behav;
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