library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all; --+ including vhdl 2008 libraries --+ These lines can be commented out when using --+ a simulator with built-in VHDL 2008 support library ieee_proposed; use ieee_proposed.standard_additions.all; use ieee_proposed.std_logic_1164_additions.all; use ieee_proposed.numeric_std_additions.all; library osvvm; use osvvm.RandomPkg.all; library libvhdl; use libvhdl.AssertP.all; use libvhdl.SimP.all; use libvhdl.QueueP.all; entity WishBoneT is end entity WishBoneT; architecture sim of WishBoneT is component WishBoneMasterE is generic ( G_ADR_WIDTH : positive := 8; --* address bus width G_DATA_WIDTH : positive := 8 --* data bus width ); port ( --+ wishbone system if WbRst_i : in std_logic; WbClk_i : in std_logic; --+ wishbone outputs WbCyc_o : out std_logic; WbStb_o : out std_logic; WbWe_o : out std_logic; WbAdr_o : out std_logic_vector(G_ADR_WIDTH-1 downto 0); WbDat_o : out std_logic_vector(G_DATA_WIDTH-1 downto 0); --+ wishbone inputs WbDat_i : in std_logic_vector(G_DATA_WIDTH-1 downto 0); WbAck_i : in std_logic; WbErr_i : in std_logic; --+ local register if LocalWen_i : in std_logic; LocalRen_i : in std_logic; LocalAdress_i : in std_logic_vector(G_ADR_WIDTH-1 downto 0); LocalData_i : in std_logic_vector(G_DATA_WIDTH-1 downto 0); LocalData_o : out std_logic_vector(G_DATA_WIDTH-1 downto 0); LocalAck_o : out std_logic; LocalError_o : out std_logic ); end component WishBoneMasterE; component WishBoneSlaveE is generic ( G_ADR_WIDTH : positive := 8; --* address bus width G_DATA_WIDTH : positive := 8 --* data bus width ); port ( --+ wishbone system if WbRst_i : in std_logic; WbClk_i : in std_logic; --+ wishbone inputs WbCyc_i : in std_logic; WbStb_i : in std_logic; WbWe_i : in std_logic; WbAdr_i : in std_logic_vector(G_ADR_WIDTH-1 downto 0); WbDat_i : in std_logic_vector(G_DATA_WIDTH-1 downto 0); --* wishbone outputs WbDat_o : out std_logic_vector(G_DATA_WIDTH-1 downto 0); WbAck_o : out std_logic; WbErr_o : out std_logic; --+ local register if LocalWen_o : out std_logic; LocalRen_o : out std_logic; LocalAdress_o : out std_logic_vector(G_ADR_WIDTH-1 downto 0); LocalData_o : out std_logic_vector(G_DATA_WIDTH-1 downto 0); LocalData_i : in std_logic_vector(G_DATA_WIDTH-1 downto 0) ); end component WishBoneSlaveE; --* testbench global clock period constant C_PERIOD : time := 5 ns; --* Wishbone data width constant C_DATA_WIDTH : natural := 8; --* Wishbone address width constant C_ADDRESS_WIDTH : natural := 8; --* testbench global clock signal s_wb_clk : std_logic := '1'; --* testbench global reset signal s_wb_reset : std_logic := '1'; --+ test done array with entry for each test signal s_test_done : boolean; signal s_wb_cyc : std_logic; signal s_wb_stb : std_logic; signal s_wb_we : std_logic; signal s_wb_adr : std_logic_vector(C_ADDRESS_WIDTH-1 downto 0); signal s_wb_master_data : std_logic_vector(C_DATA_WIDTH-1 downto 0); signal s_wb_slave_data : std_logic_vector(C_DATA_WIDTH-1 downto 0); signal s_wb_ack : std_logic; signal s_wb_err : std_logic; signal s_master_local_wen : std_logic; signal s_master_local_ren : std_logic; signal s_master_local_adress : std_logic_vector(C_ADDRESS_WIDTH-1 downto 0); signal s_master_local_din : std_logic_vector(C_DATA_WIDTH-1 downto 0); signal s_master_local_dout : std_logic_vector(C_DATA_WIDTH-1 downto 0); signal s_master_local_ack : std_logic; signal s_master_local_error : std_logic; signal s_slave_local_wen : std_logic; signal s_slave_local_ren : std_logic; signal s_slave_local_adress : std_logic_vector(C_ADDRESS_WIDTH-1 downto 0); signal s_slave_local_dout : std_logic_vector(C_DATA_WIDTH-1 downto 0); signal s_slave_local_din : std_logic_vector(C_DATA_WIDTH-1 downto 0); type t_register is array (0 to integer'(2**C_ADDRESS_WIDTH-1)) of std_logic_vector(C_DATA_WIDTH-1 downto 0); shared variable sv_wishbone_queue : t_list_queue; begin --* testbench global clock s_wb_clk <= not(s_wb_clk) after C_PERIOD/2 when not(s_test_done) else '0'; --* testbench global reset s_wb_reset <= '0' after C_PERIOD * 5; WbMasterLocalP : process is variable v_random : RandomPType; variable v_wbmaster_data : std_logic_vector(C_DATA_WIDTH-1 downto 0); begin v_random.InitSeed(v_random'instance_name); v_wbmaster_data := (others => '0'); s_master_local_din <= (others => '0'); s_master_local_adress <= (others => '0'); s_master_local_wen <= '0'; s_master_local_ren <= '0'; wait until s_wb_reset = '0'; -- write the wishbone slave registers for i in 0 to integer'(2**C_ADDRESS_WIDTH-1) loop v_wbmaster_data := v_random.RandSlv(C_DATA_WIDTH); s_master_local_din <= v_wbmaster_data; s_master_local_adress <= std_logic_vector(to_unsigned(i, C_ADDRESS_WIDTH)); s_master_local_wen <= '1'; wait until rising_edge(s_wb_clk); s_master_local_din <= (others => '0'); s_master_local_adress <= (others => '0'); s_master_local_wen <= '0'; wait until rising_edge(s_wb_clk) and s_master_local_ack = '1'; sv_wishbone_queue.push(v_wbmaster_data); end loop; -- read back and check the wishbone slave registers for i in 0 to integer'(2**C_ADDRESS_WIDTH-1) loop s_master_local_adress <= std_logic_vector(to_unsigned(i, C_ADDRESS_WIDTH)); s_master_local_ren <= '1'; wait until rising_edge(s_wb_clk); s_master_local_adress <= (others => '0'); s_master_local_ren <= '0'; wait until rising_edge(s_wb_clk) and s_master_local_ack = '1'; sv_wishbone_queue.pop(v_wbmaster_data); assert_equal(s_master_local_dout, v_wbmaster_data); end loop; report "INFO: Test successfully finished!"; s_test_done <= true; wait; end process WbMasterLocalP; i_WishBoneMasterE : WishBoneMasterE generic map ( G_ADR_WIDTH => C_ADDRESS_WIDTH, G_DATA_WIDTH => C_DATA_WIDTH ) port map ( --+ wishbone system if WbRst_i => s_wb_reset, WbClk_i => s_wb_clk, --+ wishbone outputs WbCyc_o => s_wb_cyc, WbStb_o => s_wb_stb, WbWe_o => s_wb_we, WbAdr_o => s_wb_adr, WbDat_o => s_wb_master_data, --+ wishbone inputs WbDat_i => s_wb_slave_data, WbAck_i => s_wb_ack, WbErr_i => s_wb_err, --+ local register if LocalWen_i => s_master_local_wen, LocalRen_i => s_master_local_ren, LocalAdress_i => s_master_local_adress, LocalData_i => s_master_local_din, LocalData_o => s_master_local_dout, LocalAck_o => s_master_local_ack, LocalError_o => s_master_local_error ); i_WishBoneSlaveE : WishBoneSlaveE generic map ( G_ADR_WIDTH => C_ADDRESS_WIDTH, G_DATA_WIDTH => C_DATA_WIDTH ) port map ( --+ wishbone system if WbRst_i => s_wb_reset, WbClk_i => s_wb_clk, --+ wishbone inputs WbCyc_i => s_wb_cyc, WbStb_i => s_wb_stb, WbWe_i => s_wb_we, WbAdr_i => s_wb_adr, WbDat_i => s_wb_master_data, --* wishbone outputs WbDat_o => s_wb_slave_data, WbAck_o => s_wb_ack, WbErr_o => s_wb_err, --+ local register if LocalWen_o => s_slave_local_wen, LocalRen_o => s_slave_local_ren, LocalAdress_o => s_slave_local_adress, LocalData_o => s_slave_local_dout, LocalData_i => s_slave_local_din ); WbSlaveLocalP : process (s_wb_clk) is variable v_register : t_register := (others => (others => '0')); begin if (rising_edge(s_wb_clk)) then if (s_wb_reset = '1') then v_register := (others => (others => '0')); s_slave_local_din <= (others => '0'); else if (s_slave_local_wen = '1') then v_register(to_integer(unsigned(s_slave_local_adress))) := s_slave_local_dout; elsif (s_slave_local_ren = '1') then s_slave_local_din <= v_register(to_integer(unsigned(s_slave_local_adress))); end if; end if; end if; end process WbSlaveLocalP; end architecture sim;