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flipflop.h

/***************************************************************************
 *   Copyright (C) 2005 by David Saxton                                    *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#ifndef FLIPFLOP_H
#define FLIPFLOP_H

#include "component.h"
#include "logic.h"

class Simulator;

class ClockedFlipFlop : public CallbackClass, public Component
{
      public:
            ClockedFlipFlop( ICNDocument *icnDocument, bool newItem, const char * id );
      
      protected:
            enum EdgeTrigger { Rising, Falling };
            virtual void dataChanged();
            virtual void initSymbolFromTrigger() = 0;
            EdgeTrigger m_edgeTrigger;
};


/**
@short Boolean D-Type Flip-Flop
@author David Saxton
*/
00036 class ECDFlipFlop : public ClockedFlipFlop
{
public:
      ECDFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~ECDFlipFlop();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
protected:
      virtual void drawShape( QPainter & p );
      virtual void initSymbolFromTrigger();
      void inputChanged( bool newState );
      void inStateChanged( bool newState );
      void asyncChanged(bool newState );
      void clockChanged(bool newState );
      
      LogicIn *m_pD;
      LogicIn *m_pClock;
      LogicOut *m_pQ;
      LogicOut *m_pQBar;
      LogicIn *setp;
      LogicIn *rstp;
      bool m_bPrevClock;
      
      bool m_prevD;
      unsigned long long m_prevDChangeSimTime;
      Simulator * m_pSimulator;
};


/**
@short Boolean JK-Type Flip-Flop
@author Couriousous
*/
00071 class ECJKFlipFlop : public ClockedFlipFlop
{
public:
      ECJKFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~ECJKFlipFlop();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
private:
      virtual void drawShape( QPainter & p );
      virtual void initSymbolFromTrigger();
      void inStateChanged( bool newState );
      void asyncChanged(bool newState );
      void clockChanged(bool newState );
      
      bool prev_state;
      bool m_bPrevClock;
      LogicIn *m_pJ;
      LogicIn *m_pClock;
      LogicIn *m_pK;
      LogicIn *setp;
      LogicIn *rstp;
      LogicOut *m_pQ;
      LogicOut *m_pQBar;
};


/**
@short Boolean Set-Reset Flip-Flop
@author David Saxton
*/
00103 class ECSRFlipFlop : public CallbackClass, public Component
{
public:
      ECSRFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~ECSRFlipFlop();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
protected:
      void inStateChanged( bool newState );
      LogicIn * m_pS;
      LogicIn * m_pR;
      LogicOut * m_pQ;
      LogicOut * m_pQBar;
      bool old_q1;
      bool old_q2;
};

#endif

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