-- Code your design here
library IEEE;
use IEEE.std_logic_1164.all;

entity FSM is
    port ( clk : in  STD_LOGIC;
           reset : in  STD_LOGIC;
           start : in  STD_LOGIC;
           stop  : in  STD_LOGIC;
           cout  : out  STD_LOGIC_VECTOR (2 downto 0));
end FSM;

architecture beh of FSM is

type state_t is (cs_reset,cs_wait,cs_one,cs_two,cs_three,cs_four,cs_five);
signal state, next_state : state_t := cs_reset;


begin

p_seq: process (clk,reset)
begin
 if reset ='1' then
   state <= cs_reset;
 elsif (Clk'event and Clk ='1') then
   state   <= next_state;
 end if;
end process p_seq;

p_comb: process (state,start,stop)
begin
 case state is
         when cs_reset => next_state <= cs_wait;
                          cout <= "XXX";
                      
         when cs_wait  => if (start='1' and stop='0') then
                           next_state <= cs_one;
                          else
                           next_state <= cs_wait;
                          end if;
                          cout <= "000";
        
         when cs_one  => if (stop='1') then
                          next_state <= cs_wait;
                         else
                          next_state <= cs_two;
                         end if;
                         cout <= "001";
                      

         when cs_two  => if (stop='1') then
                          next_state <= cs_wait;
                         else
                          next_state <= cs_three;
                         end if;
                         cout <= "010";
                         
         when cs_three  => if (stop='1') then
                          next_state <= cs_wait;
                         else
                          next_state <= cs_four;
                         end if;
                         cout <= "011";
                         
         when cs_four  => if (stop='1') then
                          next_state <= cs_wait;
                         else
                          next_state <= cs_five;
                         end if;
                         cout <= "100";
         
         when cs_five  => next_state <= cs_wait;
                          cout <= "101";
                                               
      end case;
      
end process p_comb;



end beh;