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Java Source | 1996-08-14 | 3.8 KB | 89 lines |
- //****************************************************************************
- // ---- version information ----
- //
- // DFlipFlop.java v 1.00 b1
- // Written by: I. van Rienen / E-mail ivr@bart.nl
- // URL: http://www/bart.nl/~ivr
- // Initial release:
- // Released in public domain:
- //
- // ---- Description ----
- // Java class containing methods for a D-flip flop
- //
- // This program and the Java source is in the public domain.
- // Permission to use, copy, modify, and distribute this software
- // and its documentation for NON-COMMERCIAL purposes and
- // without fee is hereby granted.
- //
- // Copyright 1996
- //
- // Iwan van Rienen
- // Joan Maetsuyckerstr. 145
- // 2593 ZG The Hague
- // The Netherlands
- //
- // I am not responsible for any bugs in this program and
- // possible damage to hard- or software when using this program.
- //****************************************************************************
- import java.applet.Applet;
- import java.awt.*;
- import java.util.Vector;
-
- class DFlipFlop extends IntegratedCircuit {
-
- //----------------------------------------------------------------------------
- // The constructor of a new D flip flop
- //----------------------------------------------------------------------------
- public DFlipFlop(Pin PinGrid[][], int x, int y) {
- super (x, y, 10, 6, 3, 1, 4, 4, 2, 2); // x,y,w,h HitBox x,y,w,h,I,O
- IPin[0] = new InputPin("D", 1, 2, 2, 0, 0, 0, ComponentPin.PIN_NOACTION); // name, x, y, w, h, flags
- IPin[1] = new InputPin("C", 1, 4, 2, 0, 0, 0, ComponentPin.PIN_EDGETRIGGERED); // name, x, y, w, h, flags
- OPin[0] = new OutputPin("Q", 9, 2, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags
- OPin[1] = new OutputPin("Q", 9, 4, -2, 0, 0, 0, ComponentPin.PIN_NEGATIVE); // name, x, y, w, h, flags
- ComponentName = "D-flipflop";
- ClassName = "DFlipFlop";
- RegisterPins (PinGrid, x, y);
- }
-
- //----------------------------------------------------------------------------
- // The constructor of a new D flip flop, which is a copy of CompToCopy
- //----------------------------------------------------------------------------
- public DFlipFlop (ElectronicComponent CompToCopy, int xo, int yo) {
- super (CompToCopy, xo, yo);
- }
-
- //----------------------------------------------------------------------------
- // Method for copying this component.
- //----------------------------------------------------------------------------
- public ElectronicComponent Copy(int xo, int yo) {
- DFlipFlop NewComponent = new DFlipFlop(this, xo, yo);
- return NewComponent;
- }
-
- //----------------------------------------------------------------------------
- // Here is the code that's simulating the component
- //----------------------------------------------------------------------------
- public void SimulateLogic() {
- if (IPin[1].OldLevel == 0 && IPin[1].getLevel() == 5) {
- // System.out.println ("**** Edge triggered");
- // Clock transition Low to High
- OPin[0].setLevel (IPin[0].getLevel());
- OPin[1].setLevel (IPin[0].getLevel());
- } else {
- // Nothing happened. Outputs remain unchanged.
- // do setLevel() for modifying OldLevel.
- OPin[0].setLevel (OPin[0].getLevel());
- OPin[1].setLevel (OPin[0].getLevel());
- }
-
- IPin[1].OldLevel = IPin[1].getLevel();
- }
-
- //----------------------------------------------------------------------------
- // Inform all components connected to the outputs with the OLD level,
- // because this is an edge-triggered component.
- //----------------------------------------------------------------------------
- public void Simulate(int id) {
- InformConnectedComponentsOldLevel(id);
- }
- }