control.vhd

Fire&password数字系统实验

library ieee;
use ieee.std_logic_1164.all;
use work.state_pack.all;

entity control is
       port(A,B,C,D,E,F,G,CLK   :  in std_logic;
            H,I,J,K,L,M         :  out std_logic);
end control;

architecture control_arc of control is
    signal current_state  : state:=QA;
begin
process
begin
         wait until CLK'event and CLK ='1';
         M<='1';
         case current_state is
               when QA=>H<='0';
                  if(A='0')then
                    current_state<=QA;
                  else
                    current_state<=QB;
                    m<='0';L<='1';K<='1';
                  end if;
               when QB=>M<='1';H<='0';
                  if(C='0')then
                     current_state<=QB;
                  else
                     current_state<=QC;
                     J<='1';
                  end if;
               when QC=>J<='0';I<='0';H<='1';
                   if(D='1')then
                      current_state<=QF;
                      K<='0';
                   elsif(C='1')then
                      current_state<=QC;
                      J<='1';
                   elsif(G='1')then
                      current_state<=QD;
                   elsif(E='0')then
                      current_state<=QC;
                   else
                       I<='1';
                   if(F='0')then
                      current_state<=QE;
                   elsif(G='1')then
                      current_state<=QD;
                   else
                      current_state<=QC;
                   end if;
                  end if;
               when QD=>H<='1';
                      if(E='1')then
                         current_state<=QE;
                      elsif(C='1')then
                         current_state<=QC;
                         J<='1';
                      elsif(D='0')then
                         current_state<=QD;
                      else
                         L<='0';
                         current_state<=QA;
                      end if;
              when QE=>H<='1';
                      if(C='1')then
                         current_state<=QC;
                         J<='1';
                      elsif(D='0')then
                         current_state<=QE;
                      else
                         K<='0';
                         current_state<=QF;
                      end if;
              when QF=>H<='0';
                      if(B='0')then
                          current_state<=QF;
                      else
                          current_state<=QB;
                          K<='1';M<='0';
                      end if;
              end case;
            end process;
        end control_arc;