@@ 0,0 1,79 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+library vunit_lib;
+context vunit_lib.vunit_context;
+
+library mcu_slave;
+
+library utils;
+
+library i2c_tb;
+use i2c_tb.tb_pkg.all;
+use i2c_tb.tb_i2c_pkg.all;
+use i2c_tb.tb_i2c_master_pkg.all;
+
+entity counter_tb is
+
+ generic (
+ runner_cfg : string);
+
+end entity counter_tb;
+
+architecture tb of counter_tb is
+ constant ADDRESS : std_logic_vector(6 downto 0) := "1110100";
+ constant CLK_PERIOD : time := 10 ns;
+ signal rst_n : std_logic := '0';
+ signal rst : std_logic;
+
+ signal scl_override, sda_override : std_logic := '0';
+
+ signal err_noack : std_logic;
+ signal bus_busy, dev_busy : std_logic;
+begin -- architecture tb
+ uut : entity mcu_slave.counter
+ port map (
+ clk_i => clk,
+ rst_i => rst,
+ rst_on => open,
+ err_noack_o => err_noack,
+ dev_busy_o => dev_busy,
+ bus_busy_o => bus_busy,
+ sda_io => sda,
+ scl_io => scl
+ );
+
+ sda <= not sda_override;
+ scl <= not scl_override;
+
+ clk <= not clk after CLK_PERIOD / 2;
+ rst_n <= '1' after 2 * CLK_PERIOD;
+ rst <= not rst_n;
+
+ main: process is
+ begin -- process main
+ wait until rst_n = '1';
+ wait until falling_edge(clk);
+ test_runner_setup(runner, runner_cfg);
+
+ while test_suite loop
+ if run("wrapping_counting") then
+ i2c_master_start(ADDRESS, '1', scl_override, sda_override);
+
+ for i in 0 to 99 loop
+ i2c_master_receive(std_logic_vector(to_unsigned(i, 8)), scl_override, sda_override);
+ end loop; -- i
+
+ -- starting over
+ i2c_master_receive("00000000", scl_override, sda_override);
+ i2c_master_receive("00000001", scl_override, sda_override);
+
+ i2c_master_stop(scl_override, sda_override);
+ end if;
+ end loop;
+
+ test_runner_cleanup(runner);
+ end process main;
+
+end architecture tb;