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/***************************************************************************
* 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 LOGIC_H
#define LOGIC_H
#include "element.h"
#include <qguardedptr.h>
#include <qvaluelist.h>
class Component;
class Pin;
class Simulator;
typedef QValueList<QGuardedPtr<Pin> > PinList;
typedef struct
{
float risingTrigger; // Trigger on rising edge
float fallingTrigger; // Trigger on falling edge
float output; // Output voltage
float highImpedance; // Output impedance when high
float lowImpedance; // Output impedance when low
} LogicConfig;
class CallbackClass {};
typedef void(CallbackClass::*CallbackPtr)( bool isHigh );
/**
Use this class for Logic Inputs - this will have infinite impedance.
Use isHigh() will return whether the voltage level at the pin
is high than the predetermined voltage threshold, and setHigh() will make the
output high/low, also according to the predetermined logic type / voltages.
@short Boolean Logic input
*/
class LogicIn : public Element
{
public:
LogicIn( LogicConfig config );
virtual ~LogicIn();
virtual Type type() const { return Element_LogicIn; }
virtual void setElementSet( ElementSet *c );
/**
* Set logic values from the LogicConfig.
*/
virtual void setLogic( LogicConfig config );
/**
* Check if the input state has changed, to see if we need to callback.
*/
void check();
/**
* Returns whether the pin is 'high', as defined for the logic type
* Note: this is defined as the voltage on the pin, as opposed to what the
* state was set to (the two are not necessarily the same).
*/
bool isHigh() const { return m_bLastState; }
/**
* When the logic state on this LogicIn changes, the function passed in this
* function will be called. At most one Callback can be added per LogicIn.
*/
void setCallback( CallbackClass * object, CallbackPtr func );
/**
* Reads the LogicConfig values in from KTLConfig, and returns them in a
* nice object form.
*/
static LogicConfig getConfig();
/**
* If this belongs to a logic chain, then this will be called from the chain.
*/
void setLastState( bool state ) { m_bLastState = state; }
/**
* Returns a pointer to the next LogicIn in the chain.
*/
LogicIn * nextLogic() const { return m_pNextLogic; }
/**
* Sets the next LogicIn in the chain.
*/
void setNextLogic( LogicIn * next ) { m_pNextLogic = next; }
/**
* Calls the callback function, if there is one.
*/
void callCallback()
{
if (m_pCallbackFunction)
(m_pCallbackObject->*m_pCallbackFunction)(m_bLastState);
}
protected:
virtual void updateCurrents();
virtual void add_initial_dc();
CallbackPtr m_pCallbackFunction;
CallbackClass * m_pCallbackObject;
bool m_bLastState;
LogicIn * m_pNextLogic;
LogicConfig m_config;
};
/**
@short Logic output/input
*/
class LogicOut : public LogicIn
{
public:
LogicOut( LogicConfig config, bool _high );
virtual ~LogicOut();
virtual void setLogic( LogicConfig config );
virtual void setElementSet( ElementSet *c );
virtual void add_map();
virtual Type type() const { return Element_LogicOut; }
/**
* Call this function to override the logic-high output impedance as set by
* the user. Once set, the impedance will not be changed by the user
* updating the config; only by subsequent calls to this function.
*/
void setOutputHighConductance( double g );
/**
* Call this function to override the logic-low output impedance as set by
* the user. Once set, the impedance will not be changed by the user
* updating the config; only by subsequent calls to this function.
*/
void setOutputLowConductance( double g );
/**
* Call this function to override the logic out voltage as set by the
* user. Once set, the impedance will not be changed by the user
* updating the config; only by subsequent calls to this function.
*/
void setOutputHighVoltage( double v );
/**
* Returns the voltage that this will output when high.
*/
double outputHighVoltage() const { return m_vHigh; }
/**
* Sets the pin to be high/low
*/
void setHigh( bool high );
/**
* @returns the state that this is outputting (regardless of voltage level on logic)
*/
bool outputState() const { return b_state; }
/**
* Set whether or not this LogicOut is the head of a LogicChain (controls
* itself and a bunch of LogicIns).
*/
void setUseLogicChain( bool use );
/**
* When a LogicOut configured as the start of a LogicChain changes start, it
* appends a pointer to itself to the list of change LogicOut, starting from
* the Simulator. This functions enables appending the next changed LogicOut
* to this one.
*/
void setNextChanged( LogicOut * logicOut, unsigned char chain ) { m_pNextChanged[chain] = logicOut; }
/**
* To avoid a pointer to this LogicOut being added twice in one
* iteration due to the state changing twice, this LogicOut sets an
* added flag to true after adding it to the list of changed. The flag
* must be reset to false with this function (done by Simulator).
*/
void setCanAddChanged( bool canAdd ) { m_bCanAddChanged = canAdd; }
/**
* Returns the next LogicOut that has changed, when configured as the start
* of a LogicChain.
* @see setNextChanged
*/
LogicOut * nextChanged( unsigned char chain ) const { return m_pNextChanged[chain]; }
PinList pinList;
PinList::iterator pinListBegin;
PinList::iterator pinListEnd;
protected:
void configChanged();
virtual void updateCurrents();
virtual void add_initial_dc();
// Pre-initalized levels from config
double m_gHigh;
double m_gLow;
double m_vHigh;
// Whether to use the user-defined logic values
bool m_bOutputHighConductanceConst;
bool m_bOutputLowConductanceConst;
bool m_bOutputHighVoltageConst;
double m_g_out;
double m_v_out;
double m_old_g_out;
double m_old_v_out;
bool b_state;
bool m_bCanAddChanged;
LogicOut * m_pNextChanged[2];
Simulator * m_pSimulator;
bool m_bUseLogicChain;
};
#endif
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