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+/***************************************************************************
+ * Copyright (C) 2003-2005 by David Saxton *
+ * *
+ * 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"
+
+/**
+Simple logic counter. 4 Inputs, 4 Outputs.
+
+Outputs (A-D) represent the stored value (0-15).
+The inputs are:
+@li en - Enable incrementing of value
+@li in - Input (trigger high)
+@li r - Reset stored value to 0
+@li ud - Up/Down increment
+
+@short 4 Bit Binary Counter
+@author David Saxton
+*/
+class BinaryCounter : public CallbackClass, public Component
+{
+public:
+ BinaryCounter( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
+ ~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;
+ 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