sim_model_ibis.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#include <sim/kibis/kibis.h>
#include <sim/sim_model_ibis.h>
#include <sim/sim_library_ibis.h>
#include <fmt/core.h>
#include <paths.h>
#include <wx/filename.h>
#include <wx/file.h>
#include <wx/log.h>
#include <kiway.h>
#include <schematic.h>
#include "sim_lib_mgr.h"
 
std::string SPICE_GENERATOR_IBIS::ModelName( const SPICE_ITEM& aItem ) const
{
    return fmt::format( "{}.{}", aItem.refName, aItem.baseModelName );
}
 
 
std::string SPICE_GENERATOR_IBIS::ModelLine( const SPICE_ITEM& aItem ) const
{
    return "";
}
 
std::vector<std::string> SPICE_GENERATOR_IBIS::CurrentNames( const SPICE_ITEM& aItem ) const
{
    std::vector<std::string> currentNames;
 
    for( const SIM_MODEL_PIN& pin : GetPins() )
        currentNames.push_back( fmt::format( "I({}:{})", ItemName( aItem ), pin.modelPinName ) );
 
    return currentNames;
}
 
 
std::string SPICE_GENERATOR_IBIS::IbisDevice( const SPICE_ITEM& aItem, SCHEMATIC* aSchematic,
                                              const wxString& aCacheDir, REPORTER& aReporter ) const
{
    std::string ibisLibFilename = GetFieldValue( &aItem.fields, SIM_LIBRARY::LIBRARY_FIELD, true, 0 );
    std::string ibisCompName    = GetFieldValue( &aItem.fields, SIM_LIBRARY::NAME_FIELD, true, 0  );
    std::string ibisPinName     = GetFieldValue( &aItem.fields, SIM_LIBRARY_IBIS::PIN_FIELD, true, 0 );
    std::string ibisModelName   = GetFieldValue( &aItem.fields, SIM_LIBRARY_IBIS::MODEL_FIELD, true, 0 );
    bool        diffMode        = GetFieldValue( &aItem.fields, SIM_LIBRARY_IBIS::DIFF_FIELD, true, 0 ) == "1";
 
    WX_STRING_REPORTER reporter;
    SIM_LIB_MGR        mgr( &aSchematic->Project() );
 
    std::vector<EMBEDDED_FILES*> embeddedFilesStack;
    embeddedFilesStack.push_back( aSchematic->GetEmbeddedFiles() );
    mgr.SetFilesStack( std::move( embeddedFilesStack ) );
 
    wxString path = mgr.ResolveLibraryPath( ibisLibFilename, reporter );
 
    if( reporter.HasMessage() )
        THROW_IO_ERROR( reporter.GetMessages() );
 
    KIBIS kibis( std::string( path.c_str() ) );
    kibis.m_cacheDir = std::string( aCacheDir.c_str() );
    kibis.m_Reporter = &aReporter;
 
    if( !kibis.m_valid )
        THROW_IO_ERRORF( _( "Invalid IBIS file '%s'" ), ibisLibFilename );
 
    KIBIS_COMPONENT* kcomp = kibis.GetComponent( std::string( ibisCompName ) );
 
    if( !kcomp )
        THROW_IO_ERRORF( _( "Could not find IBIS component '%s'" ), ibisCompName );
 
    KIBIS_PIN* kpin = kcomp->GetPin( ibisPinName );
 
 
    if( !kcomp->m_valid )
        THROW_IO_ERRORF( _( "Invalid IBIS component '%s'" ), ibisCompName );
 
    if( !kpin )
        THROW_IO_ERRORF( _( "Could not find IBIS pin '%s' in component '%s'" ), ibisPinName, ibisCompName );
 
    if( !kpin->m_valid )
        THROW_IO_ERRORF( _( "Invalid IBIS pin '%s' in component '%s'" ), ibisPinName, ibisCompName );
 
    KIBIS_MODEL* kmodel = kibis.GetModel( ibisModelName );
 
    if( !kmodel )
        THROW_IO_ERRORF( _( "Could not find IBIS model '%s'" ), ibisModelName );
 
    if( !kmodel->m_valid )
        THROW_IO_ERRORF( _( "Invalid IBIS model '%s'" ), ibisModelName );
 
    KIBIS_PARAMETER kparams;
 
    if( const SIM_MODEL::PARAM* vcc = m_model.FindParam( "vcc" ) )
        kparams.SetCornerFromString( kparams.m_supply, vcc->value );
 
    if( const SIM_MODEL::PARAM* rpin = m_model.FindParam( "rpin" ) )
        kparams.SetCornerFromString( kparams.m_Rpin, rpin->value );
 
    if( const SIM_MODEL::PARAM* lpin = m_model.FindParam( "lpin" ) )
        kparams.SetCornerFromString( kparams.m_Lpin, lpin->value );
 
    if( const SIM_MODEL::PARAM* cpin = m_model.FindParam( "cpin" ) )
        kparams.SetCornerFromString( kparams.m_Cpin, cpin->value );
 
    //kparams.SetCornerFromString( kparams.m_Ccomp, FindParam( "ccomp" )->value );
 
    std::string result;
 
    switch( m_model.GetType() )
    {
    case SIM_MODEL::TYPE::KIBIS_DEVICE:
        if( diffMode )
            kpin->writeSpiceDiffDevice( result, aItem.modelName, *kmodel, kparams );
        else
            kpin->writeSpiceDevice( result, aItem.modelName, *kmodel, kparams );
 
        break;
 
    case SIM_MODEL::TYPE::KIBIS_DRIVER_DC:
    {
        std::string paramValue = "";
 
        if( const SIM_MODEL::PARAM* dc = m_model.FindParam( "dc" ) )
            paramValue = dc->value;
 
        if( paramValue == "hi-Z" )
            kparams.m_waveform = new KIBIS_WAVEFORM_HIGH_Z( kibis );
        else if( paramValue == "low" )
            kparams.m_waveform = new KIBIS_WAVEFORM_STUCK_LOW( kibis );
        else if( paramValue == "high" )
            kparams.m_waveform = new KIBIS_WAVEFORM_STUCK_HIGH( kibis );
 
        if( diffMode )
            kpin->writeSpiceDiffDriver( result, aItem.modelName, *kmodel, kparams );
        else
            kpin->writeSpiceDriver( result, aItem.modelName, *kmodel, kparams );
 
        break;
    }
 
    case SIM_MODEL::TYPE::KIBIS_DRIVER_RECT:
    {
        KIBIS_WAVEFORM_RECTANGULAR* waveform = new KIBIS_WAVEFORM_RECTANGULAR( kibis );
 
        if( const SIM_MODEL::PARAM* ton = m_model.FindParam( "ton" ) )
            waveform->m_ton = SIM_VALUE::ToDouble( ton->value, 0 );
 
        if( const SIM_MODEL::PARAM* toff = m_model.FindParam( "toff" ) )
            waveform->m_toff = SIM_VALUE::ToDouble( toff->value, 0 );
 
        if( const SIM_MODEL::PARAM* td = m_model.FindParam( "td" ) )
            waveform->m_delay = SIM_VALUE::ToDouble( td->value, 0 );
 
        if( const SIM_MODEL::PARAM* n = m_model.FindParam( "n" ) )
            waveform->m_cycles = SIM_VALUE::ToInt( n->value, 1 );
 
        kparams.m_waveform = waveform;
 
        if( diffMode )
            kpin->writeSpiceDiffDriver( result, aItem.modelName, *kmodel, kparams );
        else
            kpin->writeSpiceDriver( result, aItem.modelName, *kmodel, kparams );
 
        break;
    }
 
    case SIM_MODEL::TYPE::KIBIS_DRIVER_PRBS:
    {
        KIBIS_WAVEFORM_PRBS* waveform = new KIBIS_WAVEFORM_PRBS( kibis );
 
        if( const SIM_MODEL::PARAM* f0 = m_model.FindParam( "f0" ) )
            waveform->m_bitrate = SIM_VALUE::ToDouble( f0->value, 0 );
 
        if( const SIM_MODEL::PARAM* td = m_model.FindParam( "td" ) )
            waveform->m_delay = SIM_VALUE::ToDouble( td->value, 0 );
 
        if( const SIM_MODEL::PARAM* n = m_model.FindParam( "n" ) )
            waveform->SetBits( SIM_VALUE::ToInt( n->value, 0 ) );
 
        kparams.m_waveform = waveform;
 
        if( diffMode )
            kpin->writeSpiceDiffDriver( result, aItem.modelName, *kmodel, kparams );
        else
            kpin->writeSpiceDriver( result, aItem.modelName, *kmodel, kparams );
 
        break;
    }
 
    default:
        wxFAIL_MSG( "Unknown IBIS model type" );
        return "";
    }
 
    return result;
}
 
 
SIM_MODEL_IBIS::SIM_MODEL_IBIS( TYPE aType ) :
        SIM_MODEL( aType, std::make_unique<SPICE_GENERATOR_IBIS>( *this ) ),
        m_enableDiff( false ),
        m_sourceModel( nullptr )
{
    static std::vector<PARAM::INFO> device = makeParamInfos( TYPE::KIBIS_DEVICE );
    static std::vector<PARAM::INFO> dcDriver = makeParamInfos( TYPE::KIBIS_DRIVER_DC );
    static std::vector<PARAM::INFO> rectDriver = makeParamInfos( TYPE::KIBIS_DRIVER_RECT );
    static std::vector<PARAM::INFO> prbsDriver = makeParamInfos( TYPE::KIBIS_DRIVER_PRBS );
 
    std::vector<PARAM::INFO>* paramInfos = nullptr;
 
    switch( aType )
    {
    case SIM_MODEL::TYPE::KIBIS_DEVICE:      paramInfos = &device;     break;
    case SIM_MODEL::TYPE::KIBIS_DRIVER_DC:   paramInfos = &dcDriver;   break;
    case SIM_MODEL::TYPE::KIBIS_DRIVER_RECT: paramInfos = &rectDriver; break;
    case SIM_MODEL::TYPE::KIBIS_DRIVER_PRBS: paramInfos = &prbsDriver; break;
    default:                                 wxFAIL;                   return;
    }
 
    for( const PARAM::INFO& paramInfo : *paramInfos )
        AddParam( paramInfo );
 
    SwitchSingleEndedDiff( false );
}
 
 
void SIM_MODEL_IBIS::SwitchSingleEndedDiff( bool aDiff )
{
    SetIOMode( aDiff ? IBIS_IO_MODE::DIFFERENTIAL : IBIS_IO_MODE::SINGLE_ENDED );
}
 
 
std::vector<wxString> SIM_MODEL_IBIS::GetSpiceIncludes( const SPICE_ITEM& aItem, SCHEMATIC* aSchematic,
                                                        REPORTER& aReporter ) const
{
    wxFileName cacheFn;
    cacheFn.AssignDir( PATHS::GetUserCachePath() );
    cacheFn.AppendDir( wxT( "ibis" ) );
    cacheFn.SetFullName( aItem.refName + ".cache" );
 
    wxFile cacheFile( cacheFn.GetFullPath(), wxFile::write );
 
    if( !cacheFile.IsOpened() )
        wxLogError( _( "Could not open file '%s' to write IBIS model" ), cacheFn.GetFullPath() );
 
    const SPICE_GENERATOR_IBIS& spiceGenerator = static_cast<const SPICE_GENERATOR_IBIS&>( SpiceGenerator() );
 
    wxString    cacheFilepath = cacheFn.GetPath( wxPATH_GET_VOLUME | wxPATH_GET_SEPARATOR );
    std::string modelData = spiceGenerator.IbisDevice( aItem, aSchematic, cacheFilepath, aReporter );
 
    cacheFile.Write( wxString( modelData ) );
 
    return { cacheFn.GetFullPath() };
}
 
 
void SIM_MODEL_IBIS::SetIOMode( IBIS_IO_MODE aMode )
{
    m_ioMode = aMode;
    ClearPins();
 
    switch( aMode )
    {
    case IBIS_IO_MODE::SINGLE_ENDED:
        AddPin( { "GND", "1" } );
        AddPin( { "IN/OUT", "2" } );
        removeSwitchStateParam();
        break;
 
    case IBIS_IO_MODE::DIFFERENTIAL:
        AddPin( { "GND", "1" } );
        AddPin( { "+", "2" } );
        AddPin( { "-", "3" } );
        removeSwitchStateParam();
        break;
 
    case IBIS_IO_MODE::SERIES:
        AddPin( { "PIN_A", "1" } );
        AddPin( { "PIN_B", "2" } );
        break;
    }
}
 
 
void SIM_MODEL_IBIS::addSwitchStateParam()
{
    if( FindParam( "sw_state" ) )
        return;
 
    // INFO must outlive every PARAM that references it (PARAM stores const INFO&).
    static const PARAM::INFO info = [&]
    {
        PARAM::INFO i;
        i.name = "sw_state";
        i.type = SIM_VALUE::TYPE_FLOAT;
        i.unit = "";
        i.category = PARAM::CATEGORY::PRINCIPAL;
        i.defaultValue = "1";
        i.description = _( "Switch state (1 = on, 0 = off)" ).ToStdString();
        i.isSpiceInstanceParam = true;
        i.spiceInstanceName = "SW_STATE";
        return i;
    }();
 
    AddParam( info );
}
 
 
void SIM_MODEL_IBIS::removeSwitchStateParam()
{
    // PARAM is not assignable; erase-from-middle is illegal.  sw_state is
    // the only post-construction append, so back() is safe.
    if( !m_params.empty() && m_params.back().info.name == "sw_state" )
        m_params.pop_back();
}
 
 
bool SIM_MODEL_IBIS::SetIbisModel( const SIM_LIBRARY_IBIS& aLib, const std::string& aPinNumber,
                                   const std::string& aModelName )
{
    KIBIS_COMPONENT* kcomp = aLib.m_kibis.GetComponent( GetComponentName() );
 
    if( !kcomp )
        return false;
 
    KIBIS_MODEL* kmodel = aLib.m_kibis.GetModel( aModelName );
 
    if( !kmodel )
        return false;
 
    KIBIS_PIN* kpin = kcomp->GetPin( aPinNumber );
 
    switch( kmodel->m_type )
    {
    case IBIS_MODEL_TYPE::SERIES:
    case IBIS_MODEL_TYPE::SERIES_SWITCH:
    {
        SetIOMode( IBIS_IO_MODE::SERIES );
 
        m_partnerPin.clear();
 
        if( kpin )
        {
            if( KIBIS_PIN* partner = kpin->SeriesPartner() )
                m_partnerPin = partner->m_pinNumber;
        }
 
        if( kmodel->m_type == IBIS_MODEL_TYPE::SERIES_SWITCH )
            addSwitchStateParam();
        else
            removeSwitchStateParam();
 
        break;
    }
 
    default:
        m_partnerPin.clear();
        removeSwitchStateParam();
 
        if( m_ioMode == IBIS_IO_MODE::SERIES )
            SetIOMode( IBIS_IO_MODE::SINGLE_ENDED );
 
        break;
    }
 
    return true;
}
 
SIM_MODEL_IBIS::SIM_MODEL_IBIS( TYPE aType, const SIM_MODEL_IBIS& aSource ) :
        SIM_MODEL_IBIS( aType )
{
    for( PARAM& param1 : m_params )
    {
        for( int ii = 0; ii < aSource.GetParamCount(); ++ii )
        {
            const PARAM& param2 = aSource.GetParam( ii );
 
            if( param1.info.name == param2.info.name )
                param1.value = param2.value;
        }
    }
 
    m_componentName = aSource.m_componentName;
 
    m_ibisPins = aSource.GetIbisPins();
    m_ibisModels = aSource.GetIbisModels();
 
    m_enableDiff = aSource.CanDifferential();
    m_partnerPin = aSource.m_partnerPin;
 
    // SetIOMode does not touch sw_state; re-add it for SERIES_SWITCH sources.
    SetIOMode( aSource.m_ioMode );
 
    if( aSource.IsSeries() )
    {
        if( const PARAM* srcSwState = aSource.FindParam( "sw_state" ) )
        {
            addSwitchStateParam();
            SetParamValue( "sw_state", srcSwState->value );
        }
    }
}
 
 
bool SIM_MODEL_IBIS::ChangePin( const SIM_LIBRARY_IBIS& aLib, const std::string& aPinNumber )
{
    KIBIS_COMPONENT* kcomp = aLib.m_kibis.GetComponent( std::string( GetComponentName() ) );
 
    if( !kcomp )
        return false;
 
    KIBIS_PIN* kpin = kcomp->GetPin( aPinNumber );
 
    if( !kpin )
        return false;
 
    m_ibisModels.clear();
 
    for( KIBIS_MODEL* kmodel : kpin->m_models )
        m_ibisModels.push_back( kmodel->m_name );
 
    return true;
}
 
 
void SIM_MODEL_IBIS::SetBaseModel( const SIM_MODEL& aBaseModel )
{
    // Actual base models can only be of the same type, which is not the case here, as in addition
    // to IBIS device model type we have multiple types of drivers available for the same sourced
    // model. And we don't want to inherit the default values anyway. So we just store these models
    // and use the only for Spice code generation.
    m_sourceModel = dynamic_cast<const SIM_MODEL_IBIS*>( &aBaseModel );
}
 
 
std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_IBIS::makeParamInfos( TYPE aType )
{
    std::vector<PARAM::INFO> paramInfos;
    PARAM::INFO              paramInfo;
 
    paramInfo.name = "vcc";
    paramInfo.type = SIM_VALUE::TYPE_STRING;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::PRINCIPAL;
    paramInfo.defaultValue = "typ";
    paramInfo.description = _( "Power supply" );
    paramInfo.spiceModelName = "";
    paramInfo.enumValues = { "typ", "min", "max" };
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "rpin";
    paramInfo.type = SIM_VALUE::TYPE_STRING;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::PRINCIPAL;
    paramInfo.defaultValue = "typ";
    paramInfo.description = _( "Parasitic pin resistance" );
    paramInfo.spiceModelName = "";
    paramInfo.enumValues = { "typ", "min", "max" };
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "lpin";
    paramInfo.type = SIM_VALUE::TYPE_STRING;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::PRINCIPAL;
    paramInfo.defaultValue = "typ";
    paramInfo.description = _( "Parasitic pin inductance" );
    paramInfo.spiceModelName = "";
    paramInfo.enumValues = { "typ", "min", "max" };
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "cpin";
    paramInfo.type = SIM_VALUE::TYPE_STRING;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::PRINCIPAL;
    paramInfo.defaultValue = "typ";
    paramInfo.description = _( "Parasitic pin capacitance" );
    paramInfo.spiceModelName = "";
    paramInfo.enumValues = { "typ", "min", "max" };
    paramInfos.push_back( paramInfo );
 
    std::vector<PARAM::INFO> dc = makeDcWaveformParamInfos();
    std::vector<PARAM::INFO> rect = makeRectWaveformParamInfos();
    std::vector<PARAM::INFO> prbs = makePrbsWaveformParamInfos();
 
    switch( aType )
    {
    case TYPE::KIBIS_DRIVER_DC:
        for( const PARAM::INFO& param : makeDcWaveformParamInfos() )
            paramInfos.push_back( param );
 
        break;
 
    case TYPE::KIBIS_DRIVER_RECT:
        for( const PARAM::INFO& param : makeRectWaveformParamInfos() )
            paramInfos.push_back( param );
 
        break;
 
    case TYPE::KIBIS_DRIVER_PRBS:
        for( const PARAM::INFO& param : makePrbsWaveformParamInfos() )
            paramInfos.push_back( param );
 
        break;
 
    default:
        break;
    }
 
    return paramInfos;
}
 
 
std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_IBIS::makeDcWaveformParamInfos()
{
    std::vector<PARAM::INFO> paramInfos;
    PARAM::INFO              paramInfo;
 
    paramInfo.name = "dc";
    paramInfo.type = SIM_VALUE::TYPE_STRING;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "hi-Z";
    paramInfo.description = _( "DC Value" );
    paramInfo.enumValues = { "hi-Z", "low", "high" };
    paramInfos.push_back( paramInfo );
 
    return paramInfos;
}
 
 
std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_IBIS::makeRectWaveformParamInfos()
{
    std::vector<PARAM::INFO> paramInfos;
    PARAM::INFO              paramInfo;
 
    paramInfo.name = "ton";
    paramInfo.type = SIM_VALUE::TYPE_FLOAT;
    paramInfo.unit = "s";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "";
    paramInfo.description = _( "ON time" );
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "toff";
    paramInfo.type = SIM_VALUE::TYPE_FLOAT;
    paramInfo.unit = "s";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "";
    paramInfo.description = _( "OFF time" );
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "td";
    paramInfo.type = SIM_VALUE::TYPE_FLOAT;
    paramInfo.unit = "s";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "0";
    paramInfo.description = _( "Delay" );
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "n";
    paramInfo.type = SIM_VALUE::TYPE_INT;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "1";
    paramInfo.description = _( "Number of cycles" );
    paramInfos.push_back( paramInfo );
 
    return paramInfos;
}
 
 
std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_IBIS::makePrbsWaveformParamInfos()
{
    std::vector<PARAM::INFO> paramInfos;
    PARAM::INFO              paramInfo;
 
    paramInfo.name = "f0";
    paramInfo.type = SIM_VALUE::TYPE_FLOAT;
    paramInfo.unit = "Hz";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "";
    paramInfo.description = _( "Bitrate" );
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "td";
    paramInfo.type = SIM_VALUE::TYPE_FLOAT;
    paramInfo.unit = "s";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "";
    paramInfo.description = _( "Delay" );
    paramInfos.push_back( paramInfo );
 
    paramInfo.name = "n";
    paramInfo.type = SIM_VALUE::TYPE_INT;
    paramInfo.unit = "";
    paramInfo.category = PARAM::CATEGORY::WAVEFORM;
    paramInfo.defaultValue = "";
    paramInfo.description = _( "Number of bits" );
    paramInfos.push_back( paramInfo );
 
    return paramInfos;
}