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Diffstat (limited to 'src/electronics/components/demultiplexer.cpp')
| -rw-r--r-- | src/electronics/components/demultiplexer.cpp | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/electronics/components/demultiplexer.cpp b/src/electronics/components/demultiplexer.cpp new file mode 100644 index 0000000..8a01808 --- /dev/null +++ b/src/electronics/components/demultiplexer.cpp @@ -0,0 +1,175 @@ +/*************************************************************************** + * Copyright (C) 2004-2005 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. * + ***************************************************************************/ + +#include "demultiplexer.h" + +#include "logic.h" +#include "libraryitem.h" + +#include <kiconloader.h> +#include <klocale.h> + +#include <cmath> + +Item* Demultiplexer::construct( ItemDocument *itemDocument, bool newItem, const char *id ) +{ + return new Demultiplexer( (ICNDocument*)itemDocument, newItem, id ); +} + +LibraryItem* Demultiplexer::libraryItem() +{ + return new LibraryItem( + "ec/demultiplexer", + i18n("Demultiplexer"), + i18n("Integrated Circuits"), + "ic1.png", + LibraryItem::lit_component, + Demultiplexer::construct + ); +} + +Demultiplexer::Demultiplexer( ICNDocument *icnDocument, bool newItem, const char *id ) + : Component( icnDocument, newItem, id ? id : "demultiplexer" ) +{ + m_name = i18n("Demultiplexer"); + m_desc = i18n("Seperates the input data stream into components. The value of the input is passed to the \"X\" output selected by the binary number given by the \"A\" inputs."); + + m_input = 0l; + + createProperty( "addressSize", Variant::Type::Int ); + property("addressSize")->setCaption( i18n("Address Size") ); + property("addressSize")->setMinValue(1); + property("addressSize")->setMaxValue(8); + property("addressSize")->setValue(1); + + // For backwards compatibility + createProperty( "numInput", Variant::Type::Int ); + property("numInput")->setMinValue(-1); + property("numInput")->setValue(-1); + property("numInput")->setHidden(true); +} + +Demultiplexer::~Demultiplexer() +{ +} + + +void Demultiplexer::dataChanged() +{ + if ( hasProperty("numInput") && dataInt("numInput") != -1 ) + { + int addressSize = int( std::ceil( std::log( (double)dataInt("numInput") ) / std::log(2.0) ) ); + property("numInput")->setValue(-1); + + if ( addressSize < 1 ) + addressSize = 1; + else if ( addressSize > 8 ) + addressSize = 8; + + // This function will get called again when we set the value of numInput + property("addressSize")->setValue(addressSize); + return; + } + + if ( hasProperty("numInput") ) + { + m_variantData["numInput"]->deleteLater(); + m_variantData.remove("numInput"); + } + + initPins( unsigned(dataInt("addressSize")) ); +} + + +void Demultiplexer::inStateChanged( bool /*state*/ ) +{ + unsigned long long pos = 0; + for ( unsigned i = 0; i < m_aLogic.size(); ++i ) + { + if ( m_aLogic[i]->isHigh() ) + pos += 1 << i; + } + for ( unsigned i = 0; i < m_xLogic.size(); ++i ) + m_xLogic[i]->setHigh( (pos == i) && m_input->isHigh() ); +} + + +void Demultiplexer::initPins( unsigned newAddressSize ) +{ + unsigned oldAddressSize = m_aLogic.size(); + unsigned long long oldXLogicCount = m_xLogic.size(); + unsigned long long newXLogicCount = 1 << newAddressSize; + + if ( newXLogicCount == oldXLogicCount ) + return; + + QStringList pins; + + for ( unsigned i=0; i<newAddressSize; ++i ) + pins += "A"+QString::number(i); + for ( unsigned i=newAddressSize; i<(newXLogicCount+(newXLogicCount%2))/2; ++i ) + pins += ""; + pins += "X"; + for ( unsigned i=(newXLogicCount+(newXLogicCount%2))/2+1; i<newXLogicCount; ++i ) + pins += ""; + for ( int i=newXLogicCount-1; i>=0; --i ) + pins += "X"+QString::number(i); + + initDIPSymbol( pins, 64 ); + initDIP(pins); + + ECNode *node; + + if (!m_input) + { + node = ecNodeWithID("X"); + m_input = createLogicIn(node); + m_input->setCallback( this, (CallbackPtr)(&Demultiplexer::inStateChanged) ); + } + + if ( newXLogicCount > oldXLogicCount ) + { + m_xLogic.resize(newXLogicCount); + for ( unsigned i = oldXLogicCount; i < newXLogicCount; ++i ) + { + node = ecNodeWithID("X"+QString::number(i)); + m_xLogic.insert( i, createLogicOut(node,false) ); + } + + m_aLogic.resize(newAddressSize); + for ( unsigned i = oldAddressSize; i < newAddressSize; ++i ) + { + node = ecNodeWithID("A"+QString::number(i)); + m_aLogic.insert( i, createLogicIn(node) ); + m_aLogic[i]->setCallback( this, (CallbackPtr)(&Demultiplexer::inStateChanged) ); + } + } + else + { + for ( unsigned i = newXLogicCount; i < oldXLogicCount; ++i ) + { + QString id = "X"+QString::number(i); + removeDisplayText(id); + removeElement( m_xLogic[i], false ); + removeNode(id); + } + m_xLogic.resize(newXLogicCount); + + for ( unsigned i = newAddressSize; i < oldAddressSize; ++i ) + { + QString id = "A"+QString::number(i); + removeDisplayText(id); + removeElement( m_aLogic[i], false ); + removeNode(id); + } + m_aLogic.resize(newAddressSize); + } +} + |