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kicad/eeschema/sim/ngspice.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) 2018-2024 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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 <config.h> // Needed for MSW compilation
#include <common.h>
#include <locale_io.h>
#include <fmt/core.h>
#include <paths.h>
#include "spice_circuit_model.h"
#include "ngspice.h"
#include "simulator_reporter.h"
#include "spice_settings.h"
#include <wx/stdpaths.h>
#include <wx/dir.h>
#include <wx/log.h>
#include <stdexcept>
#include <algorithm>
/**
* Flag to enable debug output of Ngspice simulator.
*
* Use "KICAD_NGSPICE" to enable Ngspice simulator tracing.
*
* @ingroup trace_env_vars
*/
static const wxChar* const traceNgspice = wxT( "KICAD_NGSPICE" );
NGSPICE::NGSPICE() :
m_ngSpice_Init( nullptr ),
m_ngSpice_Circ( nullptr ),
m_ngSpice_Command( nullptr ),
m_ngGet_Vec_Info( nullptr ),
m_ngCM_Input_Path( nullptr ),
m_ngSpice_CurPlot( nullptr ),
m_ngSpice_AllPlots( nullptr ),
m_ngSpice_AllVecs( nullptr ),
m_ngSpice_Running( nullptr ),
m_ngSpice_LockRealloc( nullptr ),
m_ngSpice_UnlockRealloc( nullptr ),
m_error( false )
{
init_dll();
}
NGSPICE::~NGSPICE() = default;
void NGSPICE::updateNgspiceSettings()
{
for( const std::string& command : GetSettingCommands() )
{
wxLogTrace( traceNgspice, "Sending Ngspice configuration command '%s'.", command );
Command( command );
}
}
void NGSPICE::Init( const SPICE_SETTINGS* aSettings )
{
Command( "reset" );
updateNgspiceSettings();
}
wxString NGSPICE::CurrentPlotName() const
{
return wxString( m_ngSpice_CurPlot() );
}
std::vector<std::string> NGSPICE::AllVectors() const
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
char* currentPlot = m_ngSpice_CurPlot();
char** allVectors = m_ngSpice_AllVecs( currentPlot );
int noOfVectors = 0;
std::vector<std::string> retVal;
if( allVectors != nullptr )
{
for( char** plot = allVectors; *plot != nullptr; plot++ )
noOfVectors++;
retVal.reserve( noOfVectors );
for( int i = 0; i < noOfVectors; i++, allVectors++ )
{
std::string vec = *allVectors;
retVal.push_back( vec );
}
}
return retVal;
}
std::vector<COMPLEX> NGSPICE::GetComplexVector( const std::string& aName, int aMaxLen )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<COMPLEX> data;
NGSPICE_LOCK_REALLOC lock( this );
if( aMaxLen == 0 )
return data;
if( vector_info* vi = m_ngGet_Vec_Info( (char*) aName.c_str() ) )
{
int length = aMaxLen < 0 ? vi->v_length : std::min( aMaxLen, vi->v_length );
data.reserve( length );
if( vi->v_realdata )
{
for( int i = 0; i < length; i++ )
data.emplace_back( vi->v_realdata[i], 0.0 );
}
else if( vi->v_compdata )
{
for( int i = 0; i < length; i++ )
data.emplace_back( vi->v_compdata[i].cx_real, vi->v_compdata[i].cx_imag );
}
}
return data;
}
std::vector<double> NGSPICE::GetRealVector( const std::string& aName, int aMaxLen )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<double> data;
NGSPICE_LOCK_REALLOC lock( this );
if( aMaxLen == 0 )
return data;
if( vector_info* vi = m_ngGet_Vec_Info( (char*) aName.c_str() ) )
{
int length = aMaxLen < 0 ? vi->v_length : std::min( aMaxLen, vi->v_length );
data.reserve( length );
if( vi->v_realdata )
{
for( int i = 0; i < length; i++ )
data.push_back( vi->v_realdata[i] );
}
else if( vi->v_compdata )
{
for( int i = 0; i < length; i++ )
{
wxASSERT( vi->v_compdata[i].cx_imag == 0.0 );
data.push_back( vi->v_compdata[i].cx_real );
}
}
}
return data;
}
std::vector<double> NGSPICE::GetImaginaryVector( const std::string& aName, int aMaxLen )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<double> data;
NGSPICE_LOCK_REALLOC lock( this );
if( aMaxLen == 0 )
return data;
if( vector_info* vi = m_ngGet_Vec_Info( (char*) aName.c_str() ) )
{
int length = aMaxLen < 0 ? vi->v_length : std::min( aMaxLen, vi->v_length );
data.reserve( length );
if( vi->v_compdata )
{
for( int i = 0; i < length; i++ )
data.push_back( vi->v_compdata[i].cx_imag );
}
}
return data;
}
std::vector<double> NGSPICE::GetGainVector( const std::string& aName, int aMaxLen )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<double> data;
NGSPICE_LOCK_REALLOC lock( this );
if( aMaxLen == 0 )
return data;
if( vector_info* vi = m_ngGet_Vec_Info( (char*) aName.c_str() ) )
{
int length = aMaxLen < 0 ? vi->v_length : std::min( aMaxLen, vi->v_length );
data.reserve( length );
if( vi->v_realdata )
{
for( int i = 0; i < length; i++ )
data.push_back( vi->v_realdata[i] );
}
else if( vi->v_compdata )
{
for( int i = 0; i < length; i++ )
data.push_back( hypot( vi->v_compdata[i].cx_real, vi->v_compdata[i].cx_imag ) );
}
}
return data;
}
std::vector<double> NGSPICE::GetPhaseVector( const std::string& aName, int aMaxLen )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<double> data;
NGSPICE_LOCK_REALLOC lock( this );
if( aMaxLen == 0 )
return data;
if( vector_info* vi = m_ngGet_Vec_Info( (char*) aName.c_str() ) )
{
int length = aMaxLen < 0 ? vi->v_length : std::min( aMaxLen, vi->v_length );
data.reserve( length );
if( vi->v_realdata )
{
for( int i = 0; i < length; i++ )
data.push_back( 0.0 ); // well, that's life
}
else if( vi->v_compdata )
{
for( int i = 0; i < length; i++ )
data.push_back( atan2( vi->v_compdata[i].cx_imag, vi->v_compdata[i].cx_real ) );
}
}
return data;
}
bool NGSPICE::Attach( const std::shared_ptr<SIMULATION_MODEL>& aModel, const wxString& aSimCommand,
unsigned aSimOptions, const wxString& aInputPath, REPORTER& aReporter )
{
SPICE_CIRCUIT_MODEL* model = dynamic_cast<SPICE_CIRCUIT_MODEL*>( aModel.get() );
STRING_FORMATTER formatter;
setCodemodelsInputPath( aInputPath.ToStdString() );
if( model && model->GetNetlist( aSimCommand, aSimOptions, &formatter, aReporter ) )
{
SIMULATOR::Attach( aModel, aSimCommand, aSimOptions, aInputPath, aReporter );
updateNgspiceSettings();
LoadNetlist( formatter.GetString() );
if( !( aSimOptions & NETLIST_EXPORTER_SPICE::OPTION_SAVE_ALL_EVENTS ) )
{
Command( "echo Command: esave none" );
Command( "esave none" );
}
return true;
}
else
{
SIMULATOR::Attach( nullptr, wxEmptyString, 0, wxEmptyString, aReporter );
return false;
}
}
bool NGSPICE::LoadNetlist( const std::string& aNetlist )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
std::vector<char*> lines;
std::stringstream ss( aNetlist );
m_netlist = "";
while( !ss.eof() )
{
char line[1024];
ss.getline( line, sizeof( line ) );
lines.push_back( strdup( line ) );
m_netlist += std::string( line ) + std::string( "\n" );
}
lines.push_back( nullptr ); // sentinel, as requested in ngSpice_Circ description
Command( "remcirc" );
bool success = !m_ngSpice_Circ( lines.data() );
for( char* line : lines )
free( line );
return success;
}
bool NGSPICE::Run()
{
LOCALE_IO toggle; // ngspice works correctly only with C locale
return Command( "bg_run" ); // bg_* commands execute in a separate thread
}
bool NGSPICE::Stop()
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
return Command( "bg_halt" ); // bg_* commands execute in a separate thread
}
bool NGSPICE::IsRunning()
{
// No need to use C locale here
return m_ngSpice_Running();
}
bool NGSPICE::Command( const std::string& aCmd )
{
LOCALE_IO c_locale; // ngspice works correctly only with C locale
validate();
return !m_ngSpice_Command( (char*) aCmd.c_str() );
}
wxString NGSPICE::GetXAxis( SIM_TYPE aType ) const
{
switch( aType )
{
case ST_AC:
case ST_SP:
case ST_NOISE:
case ST_FFT:
return wxS( "frequency" );
case ST_DC:
// find plot, which ends with "-sweep"
for( wxString vector : AllVectors() )
{
if( vector.Lower().EndsWith( wxS( "-sweep" ) ) )
return vector;
}
return wxS( "sweep" );
case ST_TRAN:
return wxS( "time" );
default:
return wxEmptyString;
}
}
std::vector<std::string> NGSPICE::GetSettingCommands() const
{
const NGSPICE_SETTINGS* settings = dynamic_cast<const NGSPICE_SETTINGS*>( Settings().get() );
std::vector<std::string> commands;
wxCHECK( settings, commands );
switch( settings->GetCompatibilityMode() )
{
case NGSPICE_COMPATIBILITY_MODE::USER_CONFIG: break;
case NGSPICE_COMPATIBILITY_MODE::NGSPICE: commands.emplace_back( "unset ngbehavior" ); break;
case NGSPICE_COMPATIBILITY_MODE::PSPICE: commands.emplace_back( "set ngbehavior=psa" ); break;
case NGSPICE_COMPATIBILITY_MODE::LTSPICE: commands.emplace_back( "set ngbehavior=lta" ); break;
case NGSPICE_COMPATIBILITY_MODE::LT_PSPICE: commands.emplace_back( "set ngbehavior=ltpsa" ); break;
case NGSPICE_COMPATIBILITY_MODE::HSPICE: commands.emplace_back( "set ngbehavior=hsa" ); break;
default: wxFAIL_MSG( wxString::Format( "Undefined NGSPICE_COMPATIBILITY_MODE %d.",
settings->GetCompatibilityMode() ) ); break;
}
return commands;
}
const std::string NGSPICE::GetNetlist() const
{
return m_netlist;
}
void NGSPICE::init_dll()
{
if( m_initialized )
return;
LOCALE_IO c_locale; // ngspice works correctly only with C locale
const wxStandardPaths& stdPaths = wxStandardPaths::Get();
if( m_dll.IsLoaded() ) // enable force reload
m_dll.Unload();
// Extra effort to find libngspice
// @todo Shouldn't we be using the normal KiCad path searching mechanism here?
wxFileName dllFile( "", NGSPICE_DLL_FILE );
#if defined(__WINDOWS__)
#if defined( _MSC_VER )
const std::vector<std::string> dllPaths = { "" };
#else
const std::vector<std::string> dllPaths = { "", "/mingw64/bin", "/mingw32/bin" };
#endif
#elif defined(__WXMAC__)
const std::vector<std::string> dllPaths = {
PATHS::GetOSXKicadUserDataDir().ToStdString() + "/PlugIns/ngspice",
PATHS::GetOSXKicadMachineDataDir().ToStdString() + "/PlugIns/ngspice",
// when running kicad.app
stdPaths.GetPluginsDir().ToStdString() + "/sim",
// when running eeschema.app
wxFileName( stdPaths.GetExecutablePath() ).GetPath().ToStdString() +
"/../../../../../Contents/PlugIns/sim"
};
#else // Unix systems
const std::vector<std::string> dllPaths = { "/usr/local/lib" };
#endif
#if defined(__WINDOWS__) || (__WXMAC__)
for( const auto& path : dllPaths )
{
dllFile.SetPath( path );
wxLogTrace( traceNgspice, "libngspice search path: %s", dllFile.GetFullPath() );
m_dll.Load( dllFile.GetFullPath(), wxDL_VERBATIM | wxDL_QUIET | wxDL_NOW );
if( m_dll.IsLoaded() )
{
wxLogTrace( traceNgspice, "libngspice path found in: %s", dllFile.GetFullPath() );
break;
}
}
if( !m_dll.IsLoaded() ) // try also the system libraries
m_dll.Load( wxDynamicLibrary::CanonicalizeName( "ngspice" ) );
#else
// First, try the system libraries
m_dll.Load( NGSPICE_DLL_FILE, wxDL_VERBATIM | wxDL_QUIET | wxDL_NOW );
// If failed, try some other paths:
if( !m_dll.IsLoaded() )
{
for( const auto& path : dllPaths )
{
dllFile.SetPath( path );
wxLogTrace( traceNgspice, "libngspice search path: %s", dllFile.GetFullPath() );
m_dll.Load( dllFile.GetFullPath(), wxDL_VERBATIM | wxDL_QUIET | wxDL_NOW );
if( m_dll.IsLoaded() )
{
wxLogTrace( traceNgspice, "libngspice path found in: %s", dllFile.GetFullPath() );
break;
}
}
}
#endif
if( !m_dll.IsLoaded() )
throw std::runtime_error( "Missing ngspice shared library" );
m_error = false;
// Obtain function pointers
m_ngSpice_Init = (ngSpice_Init) m_dll.GetSymbol( "ngSpice_Init" );
m_ngSpice_Circ = (ngSpice_Circ) m_dll.GetSymbol( "ngSpice_Circ" );
m_ngSpice_Command = (ngSpice_Command) m_dll.GetSymbol( "ngSpice_Command" );
m_ngGet_Vec_Info = (ngGet_Vec_Info) m_dll.GetSymbol( "ngGet_Vec_Info" );
m_ngCM_Input_Path = (ngCM_Input_Path) m_dll.GetSymbol( "ngCM_Input_Path" );
m_ngSpice_CurPlot = (ngSpice_CurPlot) m_dll.GetSymbol( "ngSpice_CurPlot" );
m_ngSpice_AllPlots = (ngSpice_AllPlots) m_dll.GetSymbol( "ngSpice_AllPlots" );
m_ngSpice_AllVecs = (ngSpice_AllVecs) m_dll.GetSymbol( "ngSpice_AllVecs" );
m_ngSpice_Running = (ngSpice_Running) m_dll.GetSymbol( "ngSpice_running" ); // it is not a typo
if( m_dll.HasSymbol( "ngSpice_LockRealloc" ) )
{
m_ngSpice_LockRealloc = (ngSpice_LockRealloc) m_dll.GetSymbol( "ngSpice_LockRealloc" );
m_ngSpice_UnlockRealloc = (ngSpice_UnlockRealloc) m_dll.GetSymbol( "ngSpice_UnlockRealloc" );
}
m_ngSpice_Init( &cbSendChar, &cbSendStat, &cbControlledExit, nullptr, nullptr,
&cbBGThreadRunning, this );
// Load a custom spinit file, to fix the problem with loading .cm files
// Switch to the executable directory, so the relative paths are correct
wxString cwd( wxGetCwd() );
wxFileName exeDir( stdPaths.GetExecutablePath() );
wxSetWorkingDirectory( exeDir.GetPath() );
// Find *.cm files
std::string cmPath = findCmPath();
// __CMPATH is used in custom spinit file to point to the codemodels directory
if( !cmPath.empty() )
Command( "set __CMPATH=\"" + cmPath + "\"" );
// Possible relative locations for spinit file
const std::vector<std::string> spiceinitPaths =
{
".",
#ifdef __WXMAC__
stdPaths.GetPluginsDir().ToStdString() + "/sim/ngspice/scripts",
wxFileName( stdPaths.GetExecutablePath() ).GetPath().ToStdString() +
"/../../../../../Contents/PlugIns/sim/ngspice/scripts"
#endif
"../share/kicad",
"../share",
"../../share/kicad",
"../../share"
};
bool foundSpiceinit = false;
for( const auto& path : spiceinitPaths )
{
wxLogTrace( traceNgspice, "ngspice init script search path: %s", path );
if( loadSpinit( path + "/spiceinit" ) )
{
wxLogTrace( traceNgspice, "ngspice path found in: %s", path );
foundSpiceinit = true;
break;
}
}
// Last chance to load codemodel files, we have not found
// spiceinit file, but we know the path to *.cm files
if( !foundSpiceinit && !cmPath.empty() )
loadCodemodels( cmPath );
// Restore the working directory
wxSetWorkingDirectory( cwd );
// Workarounds to avoid hang ups on certain errors
// These commands have to be called, no matter what is in the spinit file
// We have to allow interactive for user-defined signals. Hopefully whatever bug this was
// meant to address has gone away in the last 5 years...
//Command( "unset interactive" );
Command( "set noaskquit" );
Command( "set nomoremode" );
// reset and remcirc give an error if no circuit is loaded, so load an empty circuit at the
// start.
std::vector<char*> lines;
lines.push_back( strdup( "*" ) );
lines.push_back( strdup( ".end" ) );
lines.push_back( nullptr ); // Sentinel.
m_ngSpice_Circ( lines.data() );
for( auto line : lines )
free( line );
m_initialized = true;
}
bool NGSPICE::loadSpinit( const std::string& aFileName )
{
if( !wxFileName::FileExists( aFileName ) )
return false;
wxTextFile file;
if( !file.Open( aFileName ) )
return false;
for( wxString& cmd = file.GetFirstLine(); !file.Eof(); cmd = file.GetNextLine() )
Command( cmd.ToStdString() );
return true;
}
std::string NGSPICE::findCmPath() const
{
const std::vector<std::string> cmPaths =
{
#ifdef __WXMAC__
"/Applications/ngspice/lib/ngspice",
"Contents/Frameworks",
wxStandardPaths::Get().GetPluginsDir().ToStdString() + "/sim/ngspice",
wxFileName( wxStandardPaths::Get().GetExecutablePath() ).GetPath().ToStdString() +
"/../../../../../Contents/PlugIns/sim/ngspice",
"../Plugins/sim/ngspice",
#endif
"../eeschema/ngspice",
"../lib/ngspice",
"../../lib/ngspice",
"lib/ngspice",
"ngspice"
};
for( const auto& path : cmPaths )
{
wxLogTrace( traceNgspice, "ngspice code models search path: %s", path );
if( wxFileName::FileExists( path + "/spice2poly.cm" ) )
{
wxLogTrace( traceNgspice, "ngspice code models found in: %s", path );
return path;
}
}
return std::string();
}
bool NGSPICE::setCodemodelsInputPath( const std::string& aPath )
{
if( !m_ngCM_Input_Path )
return false;
LOCALE_IO c_locale; // ngspice works correctly only with C locale
m_ngCM_Input_Path( aPath.c_str() );
return true;
}
bool NGSPICE::loadCodemodels( const std::string& aPath )
{
wxArrayString cmFiles;
size_t count = wxDir::GetAllFiles( aPath, &cmFiles );
for( const auto& cm : cmFiles )
Command( fmt::format( "codemodel '{}'", cm.ToStdString() ) );
return count != 0;
}
int NGSPICE::cbSendChar( char* aWhat, int aId, void* aUser )
{
NGSPICE* sim = reinterpret_cast<NGSPICE*>( aUser );
if( sim->m_reporter )
{
// strip stdout/stderr from the line
if( ( strncasecmp( aWhat, "stdout ", 7 ) == 0 )
|| ( strncasecmp( aWhat, "stderr ", 7 ) == 0 ) )
{
aWhat += 7;
}
sim->m_reporter->Report( aWhat );
}
return 0;
}
int NGSPICE::cbSendStat( char *aWhat, int aId, void* aUser )
{
return 0;
}
int NGSPICE::cbBGThreadRunning( NG_BOOL aFinished, int aId, void* aUser )
{
NGSPICE* sim = reinterpret_cast<NGSPICE*>( aUser );
if( sim->m_reporter )
sim->m_reporter->OnSimStateChange( sim, aFinished ? SIM_IDLE : SIM_RUNNING );
return 0;
}
int NGSPICE::cbControlledExit( int aStatus, NG_BOOL aImmediate, NG_BOOL aExitOnQuit, int aId,
void* aUser )
{
// Something went wrong, reload the dll
NGSPICE* sim = reinterpret_cast<NGSPICE*>( aUser );
sim->m_error = true;
return 0;
}
void NGSPICE::validate()
{
if( m_error )
{
m_initialized = false;
init_dll();
}
}
void NGSPICE::Clean()
{
Command( "destroy all" );
}
bool NGSPICE::m_initialized = false;
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