VHDL Traffic Light - How to make signals viewable in simulation?

Hi there, relatively new to VHDL.

At the end of this description I will post my VHDL code and Test Bench. When I simulate the code, the timing seems to be off, I want it to wait 15 clock cycles to go from Main Green (MG), Side Red (SR) to MY SR, and then 3 clock cycles to go to MR SG, then another 15 to go to MR SY, and so on...

To keep count, I have to declare signals Count, in addition to signals state type to control the states.

How do I show the signals in my simulation? All it shows me is the input and output values but I'd like to see the signal values! Even to see the state values would be chillin'.

Thanks!

DESIGN CODE:

----------------------------------------------------------------------------------

-- Company:

-- Engineer:

--

-- Create Date: 05/24/2016 10:20:40 AM

-- Design Name:

-- Module Name: Traffic_Light_VHDL - Behavioral

-- Project Name:

-- Target Devices:

-- Tool Versions:

-- Description:

--

-- Dependencies:

--

-- Revision:

-- Revision 0.01 - File Created

-- Additional Comments:

--

----------------------------------------------------------------------------------

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use ieee.std_logic_arith.all;

-- Uncomment the following library declaration if using

-- arithmetic functions with Signed or Unsigned values

use IEEE.NUMERIC_STD.ALL;

use ieee.std_logic_unsigned.all;

-- Uncomment the following library declaration if instantiating

-- any Xilinx leaf cells in this code.

--library UNISIM;

--use UNISIM.VComponents.all;

entity Traffic_Light_VHDL is

Port (

Reset : in std_logic;

clk : in std_logic;

MG : out STD_LOGIC;

MY : out STD_LOGIC;

MR : out STD_LOGIC;

SG : out STD_LOGIC;

SY : out STD_LOGIC;

SR : out STD_LOGIC

);

end Traffic_Light_VHDL;

architecture Behavioral of Traffic_Light_VHDL is

type state_type is (st0, st1, st2, st3);

signal PS, NS : state_type;

signal state : state_type;

signal Count : std_logic_vector(3 downto 0);

begin

process(clk, Reset)

begin

if (Reset = '1') then

state <= st0;

Count <= "0000";

elsif (rising_edge(clk)) then

state <= NS;

end if;

end process;

process(clk)

begin

case state is

when st0 =>

if (Count < "1111") then

Count <= Count + 1;

else

NS <= st1;

Count <= "0000";

end if;

when st1 =>

if (Count < "0011") then

Count <= Count + 1;

else

NS <= st2;

Count <= "0000";

end if;

when st2 =>

if (Count < "1111") then

Count <= Count + 1;

else

NS <= st3;

Count <= "0000";

end if;

when st3 =>

if (Count < "0011") then

Count <= Count + 1;

else

NS <= st0;

Count <= "0000";

end if;

when others =>

NS <= st0;

end case;

end process;

process(state)

begin

case state is

when st0 =>

MG <= '1';

SR <= '1';

MY <= '0';

SY <= '0';

MR <= '0';

SG <= '0';

when st1 =>

MG <= '0';

SR <= '1';

MY <= '1';

SY <= '0';

MR <= '0';

SG <= '0';

when st2 =>

MG <= '0';

SR <= '0';

MY <= '0';

SY <= '0';

MR <= '1';

SG <= '1';

when st3 =>

MG <= '0';

SR <= '0';

MY <= '0';

SY <= '1';

MR <= '1';

SG <= '0';

when others =>

MG <= '1';

SR <= '1';

MY <= '0';

SY <= '0';

MR <= '0';

SG <= '0';

end case;

end process;

end Behavioral;

---TEST BENCH

----------------------------------------------------------------------------------

-- Company:

-- Engineer:

--

-- Create Date: 05/25/2016 06:52:32 PM

-- Design Name:

-- Module Name: Traffic_Light_Sim - Behavioral

-- Project Name:

-- Target Devices:

-- Tool Versions:

-- Description:

--

-- Dependencies:

--

-- Revision:

-- Revision 0.01 - File Created

-- Additional Comments:

--

----------------------------------------------------------------------------------

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use ieee.std_logic_arith.all;

use ieee.std_logic_unsigned.all;

-- Uncomment the following library declaration if using

-- arithmetic functions with Signed or Unsigned values

use IEEE.NUMERIC_STD.ALL;

-- Uncomment the following library declaration if instantiating

-- any Xilinx leaf cells in this code.

--library UNISIM;

--use UNISIM.VComponents.all;

entity Traffic_Light_Sim is

end Traffic_Light_Sim;

architecture Behavioral of Traffic_Light_Sim is

component Traffic_Light_VHDL is

Port ( Reset : in std_logic;

clk : in std_logic;

MG : out STD_LOGIC;

MY : out STD_LOGIC;

MR : out STD_LOGIC;

SG : out STD_LOGIC;

SY : out STD_LOGIC;

SR : out STD_LOGIC);

end component;

signal TReset : std_logic;

signal Tclk : std_logic;

signal TMG : std_logic;

signal TMY : std_logic;

signal TMR : std_logic;

signal TSG : std_logic;

signal TSY : std_logic;

signal TSR : std_logic;

begin

uut : Traffic_Light_VHDL port map(TReset, Tclk, TMG, TMY, TMR, TSG, TSY, TSR);

process begin

Tclk <= '0';

wait for 1 ns;

Tclk <= '1';

wait for 1 ns;

end process;

process begin

wait for 20ns;

TReset <= '1';

wait for 20ns;

TReset <= '0';

wait for 200ns;

end process;

end Behavioral;