liftcontrol.v

一个简单的电梯控制系统,主要实现一个八层楼的电梯控制.

                   else   if(inrequest[4])
                        begin
                            inrequest[4]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<='b000;
                            door<=1;
                        end
                    else
                       state<=UP;                           
				         end
				         
				    'b00010000: begin
	      				if(inrequest[5] && uprequest[5])
                        begin
                        inrequest[5]<=0;
                        uprequest[5]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(uprequest[5])
                        begin
                             uprequest[5]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                   else   if(inrequest[5])
                        begin
                            inrequest[5]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=UP;                           
				         end
				         
				    'b00100000: begin
	      				if(inrequest[6] && uprequest[6])
                        begin
                        inrequest[6]<=0;
                        uprequest[6]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(uprequest[6])
                        begin
                             uprequest[6]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                   else   if(inrequest[6])
                        begin
                            inrequest[6]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=UP;                           
				         end
				         
				     'b01000000: begin
	      				if(inrequest[7])
                        begin
                        inrequest[7]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                    else
                       state<=UP;                           
				         end
				         
				     8'b10000000: begin
				     		 state<=WAIT;
				     		 count<=0;
				     		 door<=1;
				     end
			  endcase
			  end
         
         DOWN:
         begin
         case(curfloor)
				      
             'b00000001:  begin 
                 state<=WAIT;
                 count<=0;
                 door<=1;
             	end
         		         
				     'b00000010:   begin
                 if(inrequest[0])
                        begin
                            inrequest[0]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b00000100:   begin
                   if(inrequest[1] && dnrequest[1])
                        begin
                        inrequest[1]<=0;
                        dnrequest[1]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[1])
                        begin
                             dnrequest[1]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[1])
                        begin
                            inrequest[1]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b00001000:   begin
                   if(inrequest[2] && dnrequest[2])
                        begin
                        inrequest[2]<=0;
                        dnrequest[2]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[2])
                        begin
                             dnrequest[2]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[2])
                        begin
                            inrequest[2]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b00010000:   begin
                   if(inrequest[3] && dnrequest[3])
                        begin
                        inrequest[3]<=0;
                        dnrequest[3]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[3])
                        begin
                             dnrequest[3]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[3])
                        begin
                            inrequest[3]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b00100000:   begin
                   if(inrequest[4] && dnrequest[4])
                        begin
                        inrequest[4]<=0;
                        dnrequest[4]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[4])
                        begin
                             dnrequest[4]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[4])
                        begin
                            inrequest[4]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b01000000:   begin
                   if(inrequest[5] && dnrequest[5])
                        begin
                        inrequest[5]<=0;
                        dnrequest[5]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[5])
                        begin
                             dnrequest[5]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[5])
                        begin
                            inrequest[5]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
				         
				     'b10000000:   begin
                   if(inrequest[6] && dnrequest[6])
                        begin
                        inrequest[6]<=0;
                        dnrequest[6]<=0;
                        pre_state<=state;
                        state<=WAIT;
                        count<=3'b000;
                        door<=1;
                        end
                   else  if(dnrequest[6])
                        begin
                             dnrequest[6]<=0;
                             pre_state<=state;
                             state<=WAIT;
                             count<=3'b000;
                             door<=1;
                     		end   
                     else   if(inrequest[6])
                        begin
                            inrequest[6]<=0;
                            pre_state<=state;
                            state<=WAIT;
                            count<=3'b000;
                            door<=1;
                        end
                    else
                       state<=DOWN;                           
				         end
         endcase
         end
       endcase
       end
end


   always @(posedge clk) 
      begin
          if(!rst)
             curfloor[7:0]<=8'b00000001;
             
       else
       
         case(state)
            UP:
               curfloor<=curfloor<<1;
            DOWN:
               curfloor<=curfloor>>1;
            WAIT:
               curfloor<=curfloor;
            STOP:
               curfloor<=curfloor;  
    endcase
  end
     

endmodule