lift.v

`timescale 1ns / 1ps

module lift(clk,reset,req_floor,stop,door,Up,Down,y);
input clk,reset;
input [5:0] req_floor;
output reg[1:0] door;
output reg[1:0] Up;
output reg[1:0] Down;
output reg[1:0] stop;

output [5:0] y;
reg [5:0] cf ;

always @ (posedge clk)
begin

if(reset)
begin
cf=6'd0;
stop=6'd1;
door = 1'd1;
Up=1'd0;
Down=1'd0;
end
else
begin
if(req_floor < 5'd31)
begin

if(req_floor < cf )
begin
cf=cf-1;
door=1'd0;
stop=1'd0;
Up=1'd0;
Down=1'd1;
end


else if (req_floor > cf)
begin
cf = cf+1;
door=1'd0;
stop=1'd0;
Up=1'd1;
Down=1'd0;
end

else if(req_floor == cf )
begin
cf = req_floor;
door=1'd1;
stop=1'd1;
Up=1'd0;
Down=1'd0;
end
end


end


end


assign y = cf;

endmodule