Security system

Project_DCD.v

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+module fire(flag,clock, reset, fire, fire_state,firealarm);
+  input clock, reset,flag, fire; 
+  output [2:0] fire_state;
+  output firealarm; 
+  wire firealarm;
+  reg [2:0] fire_state;
+  assign firealarm = (fire_state == 1) ?(flag?0:1): 0;
+  always @(posedge clock)
+  fire_state <= fire ? 1 : 0;
+endmodule
+
+module door(flag,clock, reset,door,door_state,dooralarm);
+  input flag,clock, reset, door; 
+   output [2:0] door_state;
+   output dooralarm;
+   wire dooralarm;
+   reg [2:0] door_state;
+   assign dooralarm = (door_state == 1) ? (flag?0:1) : 0; 
+   always @(posedge clock) 
+   door_state <= door ? 1 : 0;
+ endmodule
+
+ module window(flag,clock, reset, window, window_state, windowalarm);
+   input clock, reset,flag,window;
+   output [2:0] window_state;
+   output windowalarm; 
+   wire windowalarm; 
+   reg [2:0] window_state;
+   assign windowalarm = (window_state == 1) ? (flag?0:1): 0;
+   always @(posedge clock)
+   window_state <= window ? 1 : 0;
+ endmodule
+
+module parity_checker(window_check,fire_check,door_check,parity_output);
+  input window_check,fire_check,door_check;
+ output parity_output;
+  wire w;
+  xor(w,window_check,fire_check);
+  xor(parity_output, w, door_check);
+endmodule
+
+module security(flag,clock, reset, door,window,fire,window_state, windowalarm, door_state, dooralarm,fire_state, firealarm, parity_try);
+  input  clock, reset,flag,door,fire, window;
+  output [2:0] window_state,door_state,fire_state;
+  output  dooralarm,firealarm,windowalarm,parity_try; 
+  wire windowalarm,dooralarm,firealarm; 
+
+  fire f0(.flag(flag),.clock(clock),.reset(reset),.fire(fire),.fire_state(fire_state),.firealarm(firealarm));
+  door f1(.flag(flag),.clock(clock),.reset(reset),.door(door),.door_state(door_state),.dooralarm(dooralarm));
+  window f2(.flag(flag),.clock(clock),.reset(reset),.window(window),.window_state(window_state),.windowalarm(windowalarm));
+  parity_checker f3(window_alarm,fire_alarm,door_alarm,parity_try);
+endmodule