plugins/net.mograsim.logic.core/src/net/mograsim/logic/core/components/CoreClock.java

   1 package net.mograsim.logic.core.components;
   2
   3 import java.util.Collection;
   4 import java.util.HashSet;
   5 import java.util.List;
   6
   7 import net.mograsim.logic.core.LogicObservable;
   8 import net.mograsim.logic.core.LogicObserver;
   9 import net.mograsim.logic.core.timeline.Timeline;
  10 import net.mograsim.logic.core.timeline.TimelineEvent;
  11 import net.mograsim.logic.core.timeline.TimelineEventHandler;
  12 import net.mograsim.logic.core.types.BitVector;
  13 import net.mograsim.logic.core.wires.CoreWire;
  14 import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
  15 import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
  16
  17 public class CoreClock extends CoreComponent implements TimelineEventHandler, LogicObservable
  18 {
  19         private Collection<LogicObserver> observers;
  20         private boolean isOn = false;// first update switches to 1; so the clock starts as 1.
  21         private ReadWriteEnd out;
  22         private int delta;
  23
  24         /**
  25          *
  26          * @param out   {@link CoreWire} the clock's impulses are fed into
  27          * @param delta ticks between rising and falling edge
  28          */
  29         public CoreClock(Timeline timeline, ReadWriteEnd out, int delta)
  30         {
  31                 super(timeline);
  32                 this.delta = delta;
  33                 this.out = out;
  34                 this.observers = new HashSet<>();
  35                 addToTimeline();
  36         }
  37
  38         @Override
  39         public void handle(TimelineEvent e)
  40         {
  41                 addToTimeline();
  42                 isOn = !isOn;
  43                 out.feedSignals(getOutValues());
  44                 notifyObservers();
  45         }
  46
  47         public BitVector getOutValues()
  48         {
  49                 return isOn ? BitVector.SINGLE_1 : BitVector.SINGLE_0;
  50         }
  51
  52         public boolean isOn()
  53         {
  54                 return isOn;
  55         }
  56
  57         private void addToTimeline()
  58         {
  59                 timeline.addEvent(this, delta);
  60         }
  61
  62         @Override
  63         public List<ReadEnd> getAllInputs()
  64         {
  65                 return List.of();
  66         }
  67
  68         @Override
  69         public List<ReadWriteEnd> getAllOutputs()
  70         {
  71                 return List.of(out);
  72         }
  73
  74         @Override
  75         public void registerObserver(LogicObserver ob)
  76         {
  77                 observers.add(ob);
  78         }
  79
  80         @Override
  81         public void deregisterObserver(LogicObserver ob)
  82         {
  83                 observers.remove(ob);
  84         }
  85
  86         @Override
  87         public void notifyObservers()
  88         {
  89                 observers.forEach(ob -> ob.update(this));
  90         }
  91 }