spice_circuit_model.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2016-2022 CERN
 * Copyright (C) 1992-2023 KiCad Developers, see AUTHORS.TXT for contributors.
 * @author Maciej Suminski <[email protected]>
 *
 * 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, you may find one here:
 * https://www.gnu.org/licenses/gpl-3.0.html
 * or you may search the http://www.gnu.org website for the version 3 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include "spice_circuit_model.h"
#include <string_utils.h>
#include <wx/regex.h>
#include <wx/tokenzr.h>
#include <locale_io.h>
 
 
SIM_TRACE_TYPE SPICE_CIRCUIT_MODEL::VectorToSignal( const std::string& aVector,
 wxString& aSignal ) const
{
 static wxString BRANCH( wxS( "#branch" ) );
 static wxString POWER( wxS( ":power" ) );
 
 // See ngspice manual chapt. 31.1 "Accessing internal device parameters"
 static wxRegEx internalDevParameter( wxS( "^@(\\w*[\\.\\w+]*)\\[(\\w*)\\]$" ), wxRE_ADVANCED );
 
 wxString vector( aVector );
 
 if( !internalDevParameter.Matches( vector ) )
 {
 if( vector.EndsWith( BRANCH ) )
 {
 aSignal = wxT( "I(" ) + vector.Left( vector.Length() - BRANCH.Length() ) + wxT( ")" );
 return SPT_CURRENT;
 }
 else if( vector.EndsWith( POWER ) )
 {
 aSignal = wxT( "P(" ) + vector.Left( vector.Length() - POWER.Length() ) + wxT( ")" );
 return SPT_POWER;
 }
 else
 {
 aSignal = wxT( "V(" ) + vector + wxT( ")" );
 return SPT_VOLTAGE;
 }
 }
 else
 {
 wxString paramType = internalDevParameter.GetMatch( vector, 2 );
 
 if( paramType.Lower()[0] == 'i' )
 {
 // this is a branch current
 paramType[0] = 'I';
 aSignal = paramType + wxT( "(" );
 aSignal += internalDevParameter.GetMatch( vector, 1 ).Upper() + wxT( ")" );
 return SPT_CURRENT;
 }
 else
 {
 return SPT_UNKNOWN;
 }
 }
}
 
 
wxString SPICE_CIRCUIT_MODEL::GetSchTextSimCommand()
{
 wxString simCmd;
 
 ReadDirectives( 0 );
 
 for( const wxString& directive : GetDirectives() )
 {
 if( IsSimCommand( directive ) )
 simCmd += wxString::Format( wxT( "%s\r\n" ), directive );
 }
 
 return simCmd.Trim();
}
 
 
SIM_TYPE SPICE_CIRCUIT_MODEL::CommandToSimType( const wxString& aCmd )
{
 wxString cmd = aCmd.Lower().Trim();
 
 if( cmd == wxT( ".op" ) ) return ST_OP;
 else if( cmd.StartsWith( wxT( ".ac" ) ) ) return ST_AC;
 else if( cmd.StartsWith( wxT( ".dc" ) ) ) return ST_DC;
 else if( cmd.StartsWith( wxT( ".tran" ) ) ) return ST_TRAN;
 else if( cmd.StartsWith( wxT( ".disto" ) ) ) return ST_DISTO;
 else if( cmd.StartsWith( wxT( ".noise" ) ) ) return ST_NOISE;
 else if( cmd.StartsWith( wxT( ".pz" ) ) ) return ST_PZ;
 else if( cmd.StartsWith( wxT( ".sens" ) ) ) return ST_SENS;
 else if( cmd.StartsWith( wxT( ".sp" ) ) ) return ST_SP;
 else if( cmd.StartsWith( wxT( ".tf" ) ) ) return ST_TF;
 
 else if( cmd.StartsWith( wxT( "fft" ) ) || cmd.Contains( wxT( "\nfft" ) ) )
 return ST_FFT;
 else
 return ST_UNKNOWN;
}
 
 
bool SPICE_CIRCUIT_MODEL::ParseDCCommand( const wxString& aCmd, SPICE_DC_PARAMS* aSource1,
 SPICE_DC_PARAMS* aSource2 )
{
 if( !aCmd.Lower().StartsWith( ".dc" ) )
 return false;
 
 wxString cmd = aCmd.Mid( 3 );
 wxStringTokenizer tokens( cmd, wxS( " \t" ), wxTOKEN_STRTOK );
 
 aSource1->m_source = tokens.GetNextToken();
 aSource1->m_vstart = SPICE_VALUE( tokens.GetNextToken() );
 aSource1->m_vend = SPICE_VALUE( tokens.GetNextToken() );
 aSource1->m_vincrement = SPICE_VALUE( tokens.GetNextToken() );
 
 if( tokens.HasMoreTokens() )
 {
 aSource2->m_source = tokens.GetNextToken();
 aSource2->m_vstart = SPICE_VALUE( tokens.GetNextToken() );
 aSource2->m_vend = SPICE_VALUE( tokens.GetNextToken() );
 aSource2->m_vincrement = SPICE_VALUE( tokens.GetNextToken() );
 }
 
 return true;
}
 
 
bool SPICE_CIRCUIT_MODEL::ParsePZCommand( const wxString& aCmd, wxString* transferFunction,
 wxString* input, wxString* inputRef, wxString* output,
 wxString* outputRef, SPICE_PZ_ANALYSES* analyses )
{
 if( !aCmd.Lower().StartsWith( wxS( ".pz" ) ) )
 return false;
 
 *transferFunction = "vol";
 analyses->m_Poles = true;
 analyses->m_Zeros = true;
 
 wxStringTokenizer tokens( aCmd.Mid( 3 ), wxS( " \t" ), wxTOKEN_STRTOK );
 
 if( tokens.HasMoreTokens() )
 *input = tokens.GetNextToken();
 
 if( tokens.HasMoreTokens() )
 *inputRef = tokens.GetNextToken();
 
 if( tokens.HasMoreTokens() )
 *output = tokens.GetNextToken();
 
 if( tokens.HasMoreTokens() )
 *outputRef = tokens.GetNextToken();
 
 if( tokens.HasMoreTokens() )
 *transferFunction = tokens.GetNextToken();
 
 if( tokens.HasMoreTokens() )
 {
 wxString token = tokens.GetNextToken().Lower();
 
 if( token == wxS( "pol" ) )
 analyses->m_Zeros = false;
 else if( token == wxS( "zer" ) )
 analyses->m_Poles = false;
 }
 
 return true;
}
 
bool SPICE_CIRCUIT_MODEL::ParseNoiseCommand( const wxString& aCmd, wxString* aOutput,
 wxString* aRef, wxString* aSource, wxString* aScale,
 SPICE_VALUE* aPts, SPICE_VALUE* aFStart,
 SPICE_VALUE* aFStop, bool* aSaveAll )
{
 if( !aCmd.Lower().StartsWith( wxS( ".noise" ) ) )
 return false;
 
 wxString cmd = aCmd.Mid( 6 );
 
 cmd.Trim( false );
 
 if( !cmd.Lower().StartsWith( wxS( "v(" ) ) )
 return false;
 
 cmd = cmd.Mid( 2 );
 
 wxString function = cmd.Before( ')' );
 wxString params = cmd.After( ')' );
 
 wxStringTokenizer func_tokens( function, wxS( " ,\t" ), wxTOKEN_STRTOK );
 
 *aOutput = func_tokens.GetNextToken();
 *aRef = func_tokens.GetNextToken();
 
 wxStringTokenizer tokens( params, wxS( " \t" ), wxTOKEN_STRTOK );
 wxString token = tokens.GetNextToken();
 
 if( !token.IsEmpty() )
 {
 *aSource = token;
 token = tokens.GetNextToken();
 }
 
 if( token.Lower() == "dec" || token.Lower() == "oct" || token.Lower() == "lin" )
 {
 *aScale = token;
 token = tokens.GetNextToken();
 }
 
 if( !token.IsEmpty() )
 {
 *aPts = token;
 token = tokens.GetNextToken();
 }
 
 if( !token.IsEmpty() )
 {
 *aFStart = SPICE_VALUE( token );
 token = tokens.GetNextToken();
 }
 
 if( !token.IsEmpty() )
 {
 *aFStop = SPICE_VALUE( token );
 token = tokens.GetNextToken();
 }
 
 if( !token.IsEmpty() )
 *aSaveAll = true;
 
 return true;
}
 
 
void SPICE_CIRCUIT_MODEL::WriteDirectives( const wxString& aSimCommand, unsigned aSimOptions,
 OUTPUTFORMATTER& aFormatter ) const
{
 if( aSimCommand.IsEmpty() )
 aSimOptions |= OPTION_SIM_COMMAND;
 
 NETLIST_EXPORTER_SPICE::WriteDirectives( aSimCommand, aSimOptions, aFormatter );
 
 if( !aSimCommand.IsEmpty() )
 aFormatter.Print( 0, "%s\n", TO_UTF8( aSimCommand ) );
}