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

   1 package era.mi.logic.components;
   2
   3 import java.util.Arrays;
   4 import java.util.Collections;
   5 import java.util.List;
   6
   7 import era.mi.logic.Bit;
   8 import era.mi.logic.Simulation;
   9 import era.mi.logic.timeline.TimelineEvent;
  10 import era.mi.logic.timeline.TimelineEventHandler;
  11 import era.mi.logic.wires.Wire;
  12 import era.mi.logic.wires.Wire.WireEnd;
  13
  14 public class Clock implements TimelineEventHandler, Component
  15 {
  16         private boolean toggle = false;
  17         private WireEnd out;
  18         private int delta;
  19
  20         /**
  21          *
  22          * @param out   {@link Wire} the clock's impulses are fed into
  23          * @param delta ticks between rising and falling edge
  24          */
  25         public Clock(WireEnd out, int delta)
  26         {
  27                 this.delta = delta;
  28                 this.out = out;
  29                 addToTimeline();
  30         }
  31
  32         @Override
  33         public void handle(TimelineEvent e)
  34         {
  35                 addToTimeline();
  36                 out.feedSignals(new Bit[] { toggle ? Bit.ONE : Bit.ZERO });
  37                 toggle = !toggle;
  38         }
  39
  40         public WireEnd getOut()
  41         {
  42                 return out;
  43         }
  44
  45         private void addToTimeline()
  46         {
  47                 Simulation.TIMELINE.addEvent(this, delta);
  48         }
  49
  50         @Override
  51         public List<WireEnd> getAllInputs()
  52         {
  53                 return Collections.unmodifiableList(Arrays.asList());
  54         }
  55
  56         @Override
  57         public List<WireEnd> getAllOutputs()
  58         {
  59                 return Collections.unmodifiableList(Arrays.asList(out));
  60         }
  61 }