847 lines
20 KiB
C++
847 lines
20 KiB
C++
/*
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* KiRouter - a push-and-(sometimes-)shove PCB router
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*
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* Copyright (C) 2013-2015 CERN
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* Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
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* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <class_board.h>
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#include <class_board_item.h>
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#include <netinfo.h>
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#include "pns_node.h"
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#include "pns_walkaround.h"
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#include "pns_shove.h"
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#include "pns_utils.h"
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#include "pns_router.h"
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#include "pns_diff_pair_placer.h"
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#include "pns_solid.h"
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#include "pns_topology.h"
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#include "pns_debug_decorator.h"
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namespace PNS {
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DIFF_PAIR_PLACER::DIFF_PAIR_PLACER( ROUTER* aRouter ) :
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PLACEMENT_ALGO( aRouter )
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{
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m_state = RT_START;
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m_chainedPlacement = false;
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m_initialDiagonal = false;
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m_startDiagonal = false;
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m_fitOk = false;
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m_netP = 0;
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m_netN = 0;
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m_iteration = 0;
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m_world = NULL;
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m_shove = NULL;
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m_currentNode = NULL;
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m_lastNode = NULL;
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m_placingVia = false;
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m_viaDiameter = 0;
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m_viaDrill = 0;
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m_currentWidth = 0;
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m_currentNet = 0;
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m_currentLayer = 0;
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m_startsOnVia = false;
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m_orthoMode = false;
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m_snapOnTarget = false;
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m_currentEndItem = NULL;
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m_currentMode = RM_MarkObstacles;
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m_idle = true;
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}
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DIFF_PAIR_PLACER::~DIFF_PAIR_PLACER()
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{
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if( m_shove )
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delete m_shove;
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}
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void DIFF_PAIR_PLACER::setWorld( NODE* aWorld )
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{
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m_world = aWorld;
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}
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const VIA DIFF_PAIR_PLACER::makeVia( const VECTOR2I& aP, int aNet )
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{
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const LAYER_RANGE layers( m_sizes.GetLayerTop(), m_sizes.GetLayerBottom() );
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VIA v( aP, layers, m_sizes.ViaDiameter(), m_sizes.ViaDrill(), -1, m_sizes.ViaType() );
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v.SetNet( aNet );
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return v;
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}
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void DIFF_PAIR_PLACER::SetOrthoMode ( bool aOrthoMode )
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{
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m_orthoMode = aOrthoMode;
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if( !m_idle )
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Move( m_currentEnd, NULL );
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}
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bool DIFF_PAIR_PLACER::ToggleVia( bool aEnabled )
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{
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m_placingVia = aEnabled;
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if( !m_idle )
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Move( m_currentEnd, NULL );
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return true;
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}
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bool DIFF_PAIR_PLACER::rhMarkObstacles( const VECTOR2I& aP )
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{
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if( !routeHead( aP ) )
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return false;
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bool collP = static_cast<bool>( m_currentNode->CheckColliding( &m_currentTrace.PLine() ) );
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bool collN = static_cast<bool>( m_currentNode->CheckColliding( &m_currentTrace.NLine() ) );
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m_fitOk = !( collP || collN ) ;
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return m_fitOk;
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}
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bool DIFF_PAIR_PLACER::propagateDpHeadForces ( const VECTOR2I& aP, VECTOR2I& aNewP )
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{
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VIA virtHead = makeVia( aP, -1 );
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if( m_placingVia )
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virtHead.SetDiameter( viaGap() + 2 * virtHead.Diameter() );
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else
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{
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virtHead.SetLayer( m_currentLayer );
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virtHead.SetDiameter( m_sizes.DiffPairGap() + 2 * m_sizes.TrackWidth() );
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}
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VECTOR2I lead( 0, 0 );// = aP - m_currentStart ;
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VECTOR2I force;
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bool solidsOnly = true;
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if( m_currentMode == RM_MarkObstacles )
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{
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aNewP = aP;
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return true;
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}
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else if( m_currentMode == RM_Walkaround )
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{
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solidsOnly = false;
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}
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// fixme: I'm too lazy to do it well. Circular approximaton will do for the moment.
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if( virtHead.PushoutForce( m_currentNode, lead, force, solidsOnly, 40 ) )
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{
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aNewP = aP + force;
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return true;
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}
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return false;
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}
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bool DIFF_PAIR_PLACER::attemptWalk( NODE* aNode, DIFF_PAIR* aCurrent,
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DIFF_PAIR& aWalk, bool aPFirst, bool aWindCw, bool aSolidsOnly )
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{
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WALKAROUND walkaround( aNode, Router() );
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WALKAROUND::WALKAROUND_STATUS wf1;
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walkaround.SetSolidsOnly( aSolidsOnly );
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walkaround.SetIterationLimit( Settings().WalkaroundIterationLimit() );
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SHOVE shove( aNode, Router() );
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LINE walkP, walkN;
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aWalk = *aCurrent;
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int iter = 0;
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DIFF_PAIR cur( *aCurrent );
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bool currentIsP = aPFirst;
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int mask = aSolidsOnly ? ITEM::SOLID_T : ITEM::ANY_T;
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do
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{
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LINE preWalk = ( currentIsP ? cur.PLine() : cur.NLine() );
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LINE preShove = ( currentIsP ? cur.NLine() : cur.PLine() );
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LINE postWalk;
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if( !aNode->CheckColliding ( &preWalk, mask ) )
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{
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currentIsP = !currentIsP;
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if( !aNode->CheckColliding( &preShove, mask ) )
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break;
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else
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continue;
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}
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wf1 = walkaround.Route( preWalk, postWalk, false );
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if( wf1 != WALKAROUND::DONE )
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return false;
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LINE postShove( preShove );
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shove.ForceClearance( true, cur.Gap() - 2 * PNS_HULL_MARGIN );
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SHOVE::SHOVE_STATUS sh1;
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sh1 = shove.ProcessSingleLine( postWalk, preShove, postShove );
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if( sh1 != SHOVE::SH_OK )
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return false;
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postWalk.Line().Simplify();
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postShove.Line().Simplify();
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cur.SetShape( postWalk.CLine(), postShove.CLine(), !currentIsP );
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currentIsP = !currentIsP;
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if( !aNode->CheckColliding( &postShove, mask ) )
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break;
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iter++;
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}
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while( iter < 3 );
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if( iter == 3 )
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return false;
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aWalk.SetShape( cur.CP(), cur.CN() );
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return true;
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}
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bool DIFF_PAIR_PLACER::tryWalkDp( NODE* aNode, DIFF_PAIR &aPair, bool aSolidsOnly )
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{
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DIFF_PAIR best;
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double bestScore = 100000000000000.0;
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for( int attempt = 0; attempt <= 3; attempt++ )
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{
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DIFF_PAIR p;
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NODE *tmp = m_currentNode->Branch();
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bool pfirst = ( attempt & 1 ) ? true : false;
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bool wind_cw = ( attempt & 2 ) ? true : false;
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if( attemptWalk( tmp, &aPair, p, pfirst, wind_cw, aSolidsOnly ) )
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{
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// double len = p.TotalLength();
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double cl = p.CoupledLength();
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double skew = p.Skew();
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double score = cl + fabs( skew ) * 3.0;
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if( score < bestScore )
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{
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bestScore = score;
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best = p;
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}
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}
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delete tmp;
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}
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if( bestScore > 0.0 )
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{
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OPTIMIZER optimizer( m_currentNode );
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aPair.SetShape( best );
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optimizer.Optimize( &aPair );
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return true;
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}
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return false;
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}
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bool DIFF_PAIR_PLACER::rhWalkOnly( const VECTOR2I& aP )
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{
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if( !routeHead ( aP ) )
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return false;
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m_fitOk = tryWalkDp( m_currentNode, m_currentTrace, false );
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return m_fitOk;
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}
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bool DIFF_PAIR_PLACER::route( const VECTOR2I& aP )
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{
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switch( m_currentMode )
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{
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case RM_MarkObstacles:
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return rhMarkObstacles( aP );
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case RM_Walkaround:
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return rhWalkOnly( aP );
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case RM_Shove:
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return rhShoveOnly( aP );
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default:
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break;
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}
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return false;
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}
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bool DIFF_PAIR_PLACER::rhShoveOnly( const VECTOR2I& aP )
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{
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m_currentNode = m_shove->CurrentNode();
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bool ok = routeHead( aP );
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m_fitOk = false;
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if( !ok )
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return false;
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if( !tryWalkDp( m_currentNode, m_currentTrace, true ) )
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return false;
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LINE pLine( m_currentTrace.PLine() );
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LINE nLine( m_currentTrace.NLine() );
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ITEM_SET head;
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head.Add( &pLine );
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head.Add( &nLine );
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SHOVE::SHOVE_STATUS status = m_shove->ShoveMultiLines( head );
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m_currentNode = m_shove->CurrentNode();
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if( status == SHOVE::SH_OK )
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{
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m_currentNode = m_shove->CurrentNode();
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if( !m_currentNode->CheckColliding( &m_currentTrace.PLine() ) &&
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!m_currentNode->CheckColliding( &m_currentTrace.NLine() ) )
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{
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m_fitOk = true;
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}
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}
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return m_fitOk;
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}
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const ITEM_SET DIFF_PAIR_PLACER::Traces()
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{
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ITEM_SET t;
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t.Add( const_cast<LINE*>( &m_currentTrace.PLine() ) );
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t.Add( const_cast<LINE*>( &m_currentTrace.NLine() ) );
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return t;
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}
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void DIFF_PAIR_PLACER::FlipPosture()
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{
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m_startDiagonal = !m_startDiagonal;
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if( !m_idle )
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Move( m_currentEnd, NULL );
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}
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NODE* DIFF_PAIR_PLACER::CurrentNode( bool aLoopsRemoved ) const
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{
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if( m_lastNode )
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return m_lastNode;
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return m_currentNode;
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}
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bool DIFF_PAIR_PLACER::SetLayer( int aLayer )
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{
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if( m_idle )
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{
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m_currentLayer = aLayer;
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return true;
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}
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else if( m_chainedPlacement || !m_prevPair )
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{
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return false;
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}
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else if( !m_prevPair->PrimP() || ( m_prevPair->PrimP()->OfKind( ITEM::VIA_T ) &&
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m_prevPair->PrimP()->Layers().Overlaps( aLayer ) ) )
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{
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m_currentLayer = aLayer;
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m_start = *m_prevPair;
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initPlacement();
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Move( m_currentEnd, NULL );
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return true;
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}
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return false;
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}
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OPT_VECTOR2I DIFF_PAIR_PLACER::getDanglingAnchor( NODE* aNode, ITEM* aItem )
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{
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switch( aItem->Kind() )
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{
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case ITEM::VIA_T:
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case ITEM::SOLID_T:
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return aItem->Anchor( 0 );
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case ITEM::SEGMENT_T:
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{
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SEGMENT* s =static_cast<SEGMENT*>( aItem );
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JOINT* jA = aNode->FindJoint( s->Seg().A, s );
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JOINT* jB = aNode->FindJoint( s->Seg().B, s );
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if( jA->LinkCount() == 1 )
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return s->Seg().A;
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else if( jB->LinkCount() == 1 )
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return s->Seg().B;
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else
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return OPT_VECTOR2I();
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}
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default:
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return OPT_VECTOR2I();
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break;
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}
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}
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bool DIFF_PAIR_PLACER::findDpPrimitivePair( const VECTOR2I& aP, ITEM* aItem,
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DP_PRIMITIVE_PAIR& aPair, wxString* aErrorMsg )
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{
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int netP, netN;
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wxLogTrace( "PNS", "world %p", m_world );
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bool result = m_world->GetRuleResolver()->DpNetPair( aItem, netP, netN );
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if( !result )
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{
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if( aErrorMsg )
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{
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*aErrorMsg = _( "Unable to find complementary differential pair "
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"nets. Make sure the names of the nets belonging "
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"to a differential pair end with either _N/_P or +/-." );
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}
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return false;
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}
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int refNet = aItem->Net();
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int coupledNet = ( refNet == netP ) ? netN : netP;
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wxLogTrace( "PNS", "result %d", !!result );
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OPT_VECTOR2I refAnchor = getDanglingAnchor( m_currentNode, aItem );
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ITEM* primRef = aItem;
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wxLogTrace( "PNS", "refAnchor %p", aItem );
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if( !refAnchor )
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{
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if( aErrorMsg )
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{
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*aErrorMsg = _( "Can't find a suitable starting point. If starting "
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"from an existing differential pair make sure you are "
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"at the end." );
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}
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return false;
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}
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std::set<ITEM*> coupledItems;
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m_currentNode->AllItemsInNet( coupledNet, coupledItems );
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double bestDist = std::numeric_limits<double>::max();
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bool found = false;
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for( ITEM* item : coupledItems )
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{
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if( item->Kind() == aItem->Kind() )
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{
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OPT_VECTOR2I anchor = getDanglingAnchor( m_currentNode, item );
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if( !anchor )
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continue;
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double dist = ( *anchor - *refAnchor ).EuclideanNorm();
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bool shapeMatches = true;
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if( item->OfKind( ITEM::SOLID_T ) && item->Layers() != aItem->Layers() )
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{
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shapeMatches = false;
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}
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if( dist < bestDist && shapeMatches )
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{
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found = true;
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bestDist = dist;
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if( refNet != netP )
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{
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aPair = DP_PRIMITIVE_PAIR ( item, primRef );
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aPair.SetAnchors( *anchor, *refAnchor );
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}
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else
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{
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aPair = DP_PRIMITIVE_PAIR( primRef, item );
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aPair.SetAnchors( *refAnchor, *anchor );
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}
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}
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}
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}
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if( !found )
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{
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if( aErrorMsg )
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{
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*aErrorMsg = wxString::Format( _( "Can't find a suitable starting point "
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"for coupled net \"%s\"." ),
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m_world->GetRuleResolver()->NetName( coupledNet ) );
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}
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return false;
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}
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return true;
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}
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int DIFF_PAIR_PLACER::viaGap() const
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{
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return m_sizes.DiffPairViaGap();
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}
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int DIFF_PAIR_PLACER::gap() const
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{
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return m_sizes.DiffPairGap() + m_sizes.DiffPairWidth();
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}
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bool DIFF_PAIR_PLACER::Start( const VECTOR2I& aP, ITEM* aStartItem )
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{
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VECTOR2I p( aP );
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wxString msg;
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if( !aStartItem )
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{
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Router()->SetFailureReason( _( "Can't start a differential pair "
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" in the middle of nowhere." ) );
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return false;
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}
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setWorld( Router()->GetWorld() );
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m_currentNode = m_world;
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if( !findDpPrimitivePair( aP, aStartItem, m_start, &msg ) )
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{
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Router()->SetFailureReason( msg );
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return false;
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}
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m_netP = m_start.PrimP()->Net();
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m_netN = m_start.PrimN()->Net();
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#if 0
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// FIXME: this also needs to be factored out but not so important right now
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// Check if the current track/via gap & track width settings are violated
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BOARD* brd = NULL; // FIXME Router()->GetBoard();
|
|
NETCLASSPTR netclassP = brd->FindNet( m_netP )->GetNetClass();
|
|
NETCLASSPTR netclassN = brd->FindNet( m_netN )->GetNetClass();
|
|
int clearance = std::min( m_sizes.DiffPairGap(), m_sizes.DiffPairViaGap() );
|
|
|
|
if( clearance < netclassP->GetClearance() || clearance < netclassN->GetClearance() )
|
|
{
|
|
Router()->SetFailureReason( _( "Current track/via gap setting violates "
|
|
"design rules for this net." ) );
|
|
return false;
|
|
}
|
|
|
|
if( m_sizes.DiffPairWidth() < brd->GetDesignSettings().m_TrackMinWidth )
|
|
{
|
|
Router()->SetFailureReason( _( "Current track width setting violates design rules." ) );
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
m_currentStart = p;
|
|
m_currentEnd = p;
|
|
m_placingVia = false;
|
|
m_chainedPlacement = false;
|
|
|
|
initPlacement();
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
void DIFF_PAIR_PLACER::initPlacement()
|
|
{
|
|
m_idle = false;
|
|
m_orthoMode = false;
|
|
m_currentEndItem = NULL;
|
|
m_startDiagonal = m_initialDiagonal;
|
|
|
|
NODE* world = Router()->GetWorld();
|
|
|
|
world->KillChildren();
|
|
NODE* rootNode = world->Branch();
|
|
|
|
setWorld( rootNode );
|
|
|
|
m_lastNode = NULL;
|
|
m_currentNode = rootNode;
|
|
m_currentMode = Settings().Mode();
|
|
|
|
if( m_shove )
|
|
delete m_shove;
|
|
|
|
m_shove = NULL;
|
|
|
|
if( m_currentMode == RM_Shove || m_currentMode == RM_Smart )
|
|
{
|
|
m_shove = new SHOVE( m_currentNode, Router() );
|
|
}
|
|
}
|
|
|
|
|
|
bool DIFF_PAIR_PLACER::routeHead( const VECTOR2I& aP )
|
|
{
|
|
m_fitOk = false;
|
|
|
|
DP_GATEWAYS gwsEntry( gap() );
|
|
DP_GATEWAYS gwsTarget( gap() );
|
|
|
|
if( !m_prevPair )
|
|
m_prevPair = m_start;
|
|
|
|
gwsEntry.BuildFromPrimitivePair( *m_prevPair, m_startDiagonal );
|
|
|
|
DP_PRIMITIVE_PAIR target;
|
|
|
|
if( findDpPrimitivePair( aP, m_currentEndItem, target ) )
|
|
{
|
|
gwsTarget.BuildFromPrimitivePair( target, m_startDiagonal );
|
|
m_snapOnTarget = true;
|
|
}
|
|
else
|
|
{
|
|
VECTOR2I fp;
|
|
|
|
if( !propagateDpHeadForces( aP, fp ) )
|
|
return false;
|
|
|
|
VECTOR2I midp, dirV;
|
|
m_prevPair->CursorOrientation( fp, midp, dirV );
|
|
|
|
VECTOR2I fpProj = SEG( midp, midp + dirV ).LineProject( fp );
|
|
|
|
// compute 'leader point' distance from the cursor (project cursor position
|
|
// on the extension of the starting segment pair of the DP)
|
|
int lead_dist = ( fpProj - fp ).EuclideanNorm();
|
|
|
|
gwsTarget.SetFitVias( m_placingVia, m_sizes.ViaDiameter(), viaGap() );
|
|
|
|
// far from the initial segment extension line -> allow a 45-degree obtuse turn
|
|
if( lead_dist > m_sizes.DiffPairGap() + m_sizes.DiffPairWidth() )
|
|
{
|
|
gwsTarget.BuildForCursor( fp );
|
|
}
|
|
// close to the initial segment extension line -> keep straight part only, project as close
|
|
// as possible to the cursor
|
|
else
|
|
{
|
|
gwsTarget.BuildForCursor( fpProj );
|
|
gwsTarget.FilterByOrientation( DIRECTION_45::ANG_STRAIGHT | DIRECTION_45::ANG_HALF_FULL, DIRECTION_45( dirV ) );
|
|
}
|
|
|
|
m_snapOnTarget = false;
|
|
}
|
|
|
|
m_currentTrace = DIFF_PAIR();
|
|
m_currentTrace.SetGap( gap() );
|
|
m_currentTrace.SetLayer( m_currentLayer );
|
|
|
|
bool result = gwsEntry.FitGateways( gwsEntry, gwsTarget, m_startDiagonal, m_currentTrace );
|
|
|
|
if( result )
|
|
{
|
|
m_currentTrace.SetNets( m_netP, m_netN );
|
|
m_currentTrace.SetWidth( m_sizes.DiffPairWidth() );
|
|
m_currentTrace.SetGap( m_sizes.DiffPairGap() );
|
|
|
|
if( m_placingVia )
|
|
{
|
|
m_currentTrace.AppendVias ( makeVia( m_currentTrace.CP().CPoint( -1 ), m_netP ),
|
|
makeVia( m_currentTrace.CN().CPoint( -1 ), m_netN ) );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool DIFF_PAIR_PLACER::Move( const VECTOR2I& aP , ITEM* aEndItem )
|
|
{
|
|
m_currentEndItem = aEndItem;
|
|
m_fitOk = false;
|
|
|
|
delete m_lastNode;
|
|
m_lastNode = NULL;
|
|
|
|
bool retval = route( aP );
|
|
|
|
NODE* latestNode = m_currentNode;
|
|
m_lastNode = latestNode->Branch();
|
|
|
|
assert( m_lastNode != NULL );
|
|
m_currentEnd = aP;
|
|
|
|
updateLeadingRatLine();
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
void DIFF_PAIR_PLACER::UpdateSizes( const SIZES_SETTINGS& aSizes )
|
|
{
|
|
m_sizes = aSizes;
|
|
|
|
if( !m_idle )
|
|
{
|
|
initPlacement();
|
|
Move( m_currentEnd, NULL );
|
|
}
|
|
}
|
|
|
|
|
|
bool DIFF_PAIR_PLACER::FixRoute( const VECTOR2I& aP, ITEM* aEndItem, bool aForceFinish )
|
|
{
|
|
if( !m_fitOk && !Settings().CanViolateDRC() )
|
|
return false;
|
|
|
|
if( m_currentTrace.CP().SegmentCount() < 1 ||
|
|
m_currentTrace.CN().SegmentCount() < 1 )
|
|
return false;
|
|
|
|
if( m_currentTrace.CP().SegmentCount() > 1 )
|
|
m_initialDiagonal = !DIRECTION_45( m_currentTrace.CP().CSegment( -2 ) ).IsDiagonal();
|
|
|
|
TOPOLOGY topo( m_lastNode );
|
|
|
|
if( !m_snapOnTarget && !m_currentTrace.EndsWithVias() && !aForceFinish )
|
|
{
|
|
SHAPE_LINE_CHAIN newP( m_currentTrace.CP() );
|
|
SHAPE_LINE_CHAIN newN( m_currentTrace.CN() );
|
|
|
|
if( newP.SegmentCount() > 1 && newN.SegmentCount() > 1 )
|
|
{
|
|
newP.Remove( -1, -1 );
|
|
newN.Remove( -1, -1 );
|
|
}
|
|
|
|
m_currentTrace.SetShape( newP, newN );
|
|
}
|
|
|
|
if( m_currentTrace.EndsWithVias() )
|
|
{
|
|
m_lastNode->Add( Clone( m_currentTrace.PLine().Via() ) );
|
|
m_lastNode->Add( Clone( m_currentTrace.NLine().Via() ) );
|
|
m_chainedPlacement = false;
|
|
}
|
|
else
|
|
{
|
|
m_chainedPlacement = !m_snapOnTarget && !aForceFinish;
|
|
}
|
|
|
|
LINE lineP( m_currentTrace.PLine() );
|
|
LINE lineN( m_currentTrace.NLine() );
|
|
|
|
m_lastNode->Add( lineP );
|
|
m_lastNode->Add( lineN );
|
|
|
|
topo.SimplifyLine( &lineP );
|
|
topo.SimplifyLine( &lineN );
|
|
|
|
m_prevPair = m_currentTrace.EndingPrimitives();
|
|
|
|
Router()->CommitRouting( m_lastNode );
|
|
|
|
m_lastNode = NULL;
|
|
m_placingVia = false;
|
|
|
|
if( m_snapOnTarget || aForceFinish )
|
|
{
|
|
m_idle = true;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
initPlacement();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
void DIFF_PAIR_PLACER::GetModifiedNets( std::vector<int> &aNets ) const
|
|
{
|
|
aNets.push_back( m_netP );
|
|
aNets.push_back( m_netN );
|
|
}
|
|
|
|
|
|
void DIFF_PAIR_PLACER::updateLeadingRatLine()
|
|
{
|
|
SHAPE_LINE_CHAIN ratLineN, ratLineP;
|
|
TOPOLOGY topo( m_lastNode );
|
|
|
|
if( topo.LeadingRatLine( &m_currentTrace.PLine(), ratLineP ) )
|
|
{
|
|
Dbg()->AddLine( ratLineP, 1, 10000 );
|
|
}
|
|
|
|
if( topo.LeadingRatLine ( &m_currentTrace.NLine(), ratLineN ) )
|
|
{
|
|
Dbg()->AddLine( ratLineN, 3, 10000 );
|
|
}
|
|
}
|
|
|
|
|
|
const std::vector<int> DIFF_PAIR_PLACER::CurrentNets() const
|
|
{
|
|
std::vector<int> rv;
|
|
rv.push_back( m_netP );
|
|
rv.push_back( m_netN );
|
|
return rv;
|
|
}
|
|
|
|
}
|