binarycounter.h

/***************************************************************************
 *   Copyright (C) 2003-2005 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 EC4BITCOUNTER_H
#define EC4BITCOUNTER_H

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

class BinaryCounter : public CallbackClass, public Component
{
public:
        BinaryCounter( ICNDocument *icnDocument, bool newItem, const char *id = 0 );
        ~BinaryCounter();
        
        virtual bool canFlip() const { return true; }
        static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
        static LibraryItem *libraryItem();
        
protected:
        void inStateChanged( bool state ); // Input
        void rStateChanged( bool state ); // Reset
        void enStateChanged( bool state ); // Enable
        void udStateChanged( bool state ); // Up/Down
        void outputValue();
        void dataChanged();
        void initPins( unsigned numBits );

        LogicIn *enLogic, *inLogic, *rLogic, *udLogic;
        LogicOut * m_pLogicOut[26];

        unsigned m_numBits;


// um, why are we remembering the pin states? Shouldn't we be reading these from the
// simulator for each step? 
        bool b_triggerHigh;
        bool b_en; // Enable
        bool b_ud; // Up/Down
        bool b_oldIn;
        bool b_reset;
        long m_value;
        long m_maxValue;
        bool m_bDoneLogicIn;
};

#endif

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