era.mi/src/era/mi/logic/components/Clock.java

   1 package era.mi.logic.components;
   2
   3 import java.util.List;
   4
   5 import era.mi.logic.Simulation;
   6 import era.mi.logic.timeline.TimelineEvent;
   7 import era.mi.logic.timeline.TimelineEventHandler;
   8 import era.mi.logic.types.Bit;
   9 import era.mi.logic.wires.Wire;
  10 import era.mi.logic.wires.Wire.ReadEnd;
  11 import era.mi.logic.wires.Wire.ReadWriteEnd;
  12
  13 public class Clock implements TimelineEventHandler, Component
  14 {
  15         private boolean toggle = false;
  16         private ReadWriteEnd out;
  17         private int delta;
  18
  19         /**
  20          *
  21          * @param out   {@link Wire} the clock's impulses are fed into
  22          * @param delta ticks between rising and falling edge
  23          */
  24         public Clock(ReadWriteEnd out, int delta)
  25         {
  26                 this.delta = delta;
  27                 this.out = out;
  28                 addToTimeline();
  29         }
  30
  31         @Override
  32         public void handle(TimelineEvent e)
  33         {
  34                 addToTimeline();
  35                 out.feedSignals(toggle ? Bit.ONE : Bit.ZERO);
  36                 toggle = !toggle;
  37         }
  38
  39         public ReadWriteEnd getOut()
  40         {
  41                 return out;
  42         }
  43
  44         private void addToTimeline()
  45         {
  46                 Simulation.TIMELINE.addEvent(this, delta);
  47         }
  48
  49         @Override
  50         public List<ReadEnd> getAllInputs()
  51         {
  52                 return List.of();
  53         }
  54
  55         @Override
  56         public List<ReadWriteEnd> getAllOutputs()
  57         {
  58                 return List.of(out);
  59         }
  60 }