Write a Test Bench for the Five-Cycles High Laser Timer (please see the VHDL code for reference). library ieee;use ieee.std logic l164.all;entity LaserTimer isport (b : in std logic;x : out std logic;clk, rst : in std logic -- Tclk = 10 ns6.-- output = 50 ns78end LaserTimer;1011architecture behavior of LaserTimer is12type statetype is(S_Off, s_Onl, s_On2, s_On3, s_On4, s_On5);signal currentState, nextState: statetype;13141516begin17statereg: process (clk, rst)18begin19if (rst='l') theninitial state--20currentstate <= S Off;21elsif (clk='1' and clk'event) then22currentstate <= nextstate;23end if;24end process;26comblogic: process (currentstate, b)27begin28case currentstate is29when S Off =>x <= '0';if (b=' 0') thennextstate <= S Off;30laser off313233else34nextstate <= S Onl;35end if;36when S Onl =>x <= '1';nextstate <= s On2;37laser on--3839when S On2 =>40x <= 'l';laser on--41nextstate <= S On3;42when S On3 =>43x <= '1';laser on--44nextstate <= S On4;45when S On4 =>x <= '1';nextstate <= S On5;46laser on--4748when S On5 =>x <= '1';nextstate <= S Off;end case;49laser on--505152end process;53end behavior;542222 N M M m m m m m 3

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Write a Test Bench for the Five-Cycles High Laser Timer (please see the VHDL code for reference).

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Question

Write a Test Bench for the Five-Cycles High Laser Timer (please see the VHDL code for reference).

library ieee;
use ieee.std logic l164.all;
entity LaserTimer is
port (b : in std logic;
x : out std logic;
clk, rst : in std logic -- Tclk = 10 ns
6.
-- output = 50 ns
7
8
end LaserTimer;
10
11
architecture behavior of LaserTimer is
12
type statetype is
(S_Off, s_Onl, s_On2, s_On3, s_On4, s_On5);
signal currentState, nextState: statetype;
13
14
15
16
begin
17
statereg: process (clk, rst)
18
begin
19
if (rst='l') then
initial state
--
20
currentstate <= S Off;
21
elsif (clk='1' and clk'event) then
22
currentstate <= nextstate;
23
end if;
24
end process;
26
comblogic: process (currentstate, b)
27
begin
28
case currentstate is
29
when S Off =>
x <= '0';
if (b=' 0') then
nextstate <= S Off;
30
laser off
31
32
33
else
34
nextstate <= S Onl;
35
end if;
36
when S Onl =>
x <= '1';
nextstate <= s On2;
37
laser on
--
38
39
when S On2 =>
40
x <= 'l';
laser on
--
41
nextstate <= S On3;
42
when S On3 =>
43
x <= '1';
laser on
--
44
nextstate <= S On4;
45
when S On4 =>
x <= '1';
nextstate <= S On5;
46
laser on
--
47
48
when S On5 =>
x <= '1';
nextstate <= S Off;
end case;
49
laser on
--
50
51
52
end process;
53
end behavior;
54
2222 N M M m m m m m 3

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