drc_test_provider_lvs.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2022 KiCad Developers.
 *
 * 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.
 *
 * 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:
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 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
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 */

#include <board.h>
#include <pad.h>
#include <drc/drc_engine.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider.h>

#include <kiway.h>
#include <netlist_reader/pcb_netlist.h>

/*
 Layout-versus-schematic (LVS) test.

 Errors generated:
 - DRCE_MISSING_FOOTPRINT
 - DRCE_DUPLICATE_FOOTPRINT
 - DRCE_EXTRA_FOOTPRINT

 TODO:
 - cross-check PCB netlist against SCH netlist
 - cross-check PCB fields against SCH fields
*/

class DRC_TEST_PROVIDER_LVS : public DRC_TEST_PROVIDER
{
public:
 DRC_TEST_PROVIDER_LVS()
 {
 m_isRuleDriven = false;
 }

 virtual ~DRC_TEST_PROVIDER_LVS()
 {
 }

 virtual bool Run() override;

 virtual const wxString GetName() const override
 {
 return wxT( "LVS" );
 };

 virtual const wxString GetDescription() const override
 {
 return wxT( "Performs layout-vs-schematics integity check" );
 }

 virtual std::set<DRC_CONSTRAINT_T> GetConstraintTypes() const override;

 int GetNumPhases() const override;

private:
 void testFootprints( NETLIST& aNetlist );
};


void DRC_TEST_PROVIDER_LVS::testFootprints( NETLIST& aNetlist )
{
 BOARD* board = m_drcEngine->GetBoard();

 auto compare = []( const FOOTPRINT* x, const FOOTPRINT* y )
 {
 return x->GetReference().CmpNoCase( y->GetReference() ) < 0;
 };

 auto footprints = std::set<FOOTPRINT*, decltype( compare )>( compare );

 // Search for duplicate footprints on the board
 for( FOOTPRINT* footprint : board->Footprints() )
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_DUPLICATE_FOOTPRINT ) )
 break;

 auto ins = footprints.insert( footprint );

 if( !ins.second && !( footprint->GetAttributes() & FP_BOARD_ONLY ) )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_DUPLICATE_FOOTPRINT );
 drcItem->SetItems( footprint, *ins.first );

 reportViolation( drcItem, footprint->GetPosition() );
 }
 }

 // Search for component footprints in the netlist but not on the board.
 for( unsigned ii = 0; ii < aNetlist.GetCount(); ii++ )
 {
 COMPONENT* component = aNetlist.GetComponent( ii );
 FOOTPRINT* footprint = board->FindFootprintByReference( component->GetReference() );

 if( footprint == nullptr )
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_MISSING_FOOTPRINT ) )
 break;

 m_msg.Printf( _( "Missing footprint %s (%s)" ),
 component->GetReference(),
 component->GetValue() );

 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_MISSING_FOOTPRINT );

 drcItem->SetErrorMessage( m_msg );
 reportViolation( drcItem, wxPoint() );
 }
 else
 {
 for( PAD* pad : footprint->Pads() )
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_NET_CONFLICT ) )
 break;

 if( !pad->CanHaveNumber() )
 continue;

 const COMPONENT_NET& sch_net = component->GetNet( pad->GetNumber() );
 const wxString& pcb_netname = pad->GetNetname();

 if( !pcb_netname.IsEmpty() && sch_net.GetPinName().IsEmpty() )
 {
 m_msg.Printf( _( "No corresponding pin found in schematic." ) );

 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_NET_CONFLICT );
 drcItem->SetErrorMessage( m_msg );
 drcItem->SetItems( pad );
 reportViolation( drcItem, footprint->GetPosition() );
 }
 else if( pcb_netname.IsEmpty() && !sch_net.GetNetName().IsEmpty() )
 {
 m_msg.Printf( _( "Pad missing net given by schematic (%s)." ),
 sch_net.GetNetName() );

 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_NET_CONFLICT );
 drcItem->SetErrorMessage( m_msg );
 drcItem->SetItems( pad );
 reportViolation( drcItem, footprint->GetPosition() );
 }
 else if( pcb_netname != sch_net.GetNetName() )
 {
 m_msg.Printf( _( "Pad net (%s) doesn't match net given by schematic (%s)." ),
 pcb_netname,
 sch_net.GetNetName() );

 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_NET_CONFLICT );
 drcItem->SetErrorMessage( m_msg );
 drcItem->SetItems( pad );
 reportViolation( drcItem, footprint->GetPosition() );
 }
 }

 for( unsigned jj = 0; jj < component->GetNetCount(); ++jj )
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_NET_CONFLICT ) )
 break;

 const COMPONENT_NET& sch_net = component->GetNet( jj );

 if( !footprint->FindPadByNumber( sch_net.GetPinName() ) )
 {
 m_msg.Printf( _( "No pad found for pin %s in schematic." ),
 sch_net.GetPinName() );

 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_NET_CONFLICT );
 drcItem->SetErrorMessage( m_msg );
 drcItem->SetItems( footprint );
 reportViolation( drcItem, footprint->GetPosition() );
 }
 }
 }
 }

 // Search for component footprints found on board but not in netlist.
 for( FOOTPRINT* footprint : board->Footprints() )
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_EXTRA_FOOTPRINT ) )
 break;

 if( footprint->GetAttributes() & FP_BOARD_ONLY )
 continue;

 if( !aNetlist.GetComponentByReference( footprint->GetReference() ) )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_EXTRA_FOOTPRINT );

 drcItem->SetItems( footprint );
 reportViolation( drcItem, footprint->GetPosition() );
 }
 }
}


bool DRC_TEST_PROVIDER_LVS::Run()
{
 if( m_drcEngine->GetTestFootprints() )
 {
 if( !reportPhase( _( "Checking PCB to schematic parity..." ) ) )
 return false;

 auto netlist = m_drcEngine->GetSchematicNetlist();

 if( !netlist )
 {
 reportAux( wxT( "No netlist provided, skipping LVS." ) );
 return true;
 }

 testFootprints( *netlist );

 reportRuleStatistics();
 }

 return true;
}


int DRC_TEST_PROVIDER_LVS::GetNumPhases() const
{
 return m_drcEngine->GetTestFootprints() ? 1 : 0;
}


std::set<DRC_CONSTRAINT_T> DRC_TEST_PROVIDER_LVS::GetConstraintTypes() const
{
 return {};
}


namespace detail
{
static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_LVS> dummy;
}