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kicad/eeschema/connection_graph.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 CERN
* @author Jon Evans <jon@craftyjon.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <list>
#include <thread>
#include <algorithm>
#include <future>
#include <vector>
#include <unordered_map>
#include <profile.h>
#include <common.h>
#include <erc.h>
#include <sch_bus_entry.h>
#include <sch_component.h>
#include <sch_edit_frame.h>
#include <sch_line.h>
#include <sch_marker.h>
#include <sch_pin.h>
#include <sch_sheet.h>
#include <sch_sheet_path.h>
#include <sch_text.h>
#include <schematic.h>
#include <connection_graph.h>
#include <widgets/ui_common.h>
#include <advanced_config.h> // for realtime connectivity switch
/*
* Flag to enable connectivity profiling
* @ingroup trace_env_vars
*/
static const wxChar ConnProfileMask[] = wxT( "CONN_PROFILE" );
bool CONNECTION_SUBGRAPH::ResolveDrivers( bool aCreateMarkers )
{
PRIORITY highest_priority = PRIORITY::INVALID;
std::vector<SCH_ITEM*> candidates;
std::vector<SCH_ITEM*> strong_drivers;
m_driver = nullptr;
// Hierarchical labels are lower priority than local labels here,
// because on the first pass we want local labels to drive subgraphs
// so that we can identify same-sheet neighbors and link them together.
// Hierarchical labels will end up overriding the final net name if
// a higher-level sheet has a different name during the hierarchical
// pass.
for( SCH_ITEM* item : m_drivers )
{
PRIORITY item_priority = GetDriverPriority( item );
if( item_priority == PRIORITY::PIN
&& !static_cast<SCH_PIN*>( item )->GetParentComponent()->IsInNetlist() )
continue;
if( item_priority >= PRIORITY::HIER_LABEL )
strong_drivers.push_back( item );
if( item_priority > highest_priority )
{
candidates.clear();
candidates.push_back( item );
highest_priority = item_priority;
}
else if( !candidates.empty() && ( item_priority == highest_priority ) )
{
candidates.push_back( item );
}
}
if( highest_priority >= PRIORITY::HIER_LABEL )
m_strong_driver = true;
// Power pins are 5, global labels are 6
m_local_driver = ( highest_priority < PRIORITY::POWER_PIN );
if( !candidates.empty() )
{
if( candidates.size() > 1 )
{
if( highest_priority == PRIORITY::SHEET_PIN )
{
// We have multiple options, and they are all hierarchical
// sheet pins. Let's prefer outputs over inputs.
for( auto c : candidates )
{
auto p = static_cast<SCH_SHEET_PIN*>( c );
if( p->GetShape() == PINSHEETLABEL_SHAPE::PS_OUTPUT )
{
m_driver = c;
break;
}
}
}
else
{
// For all other driver types, sort by name
std::sort( candidates.begin(), candidates.end(),
[&]( SCH_ITEM* a, SCH_ITEM* b ) -> bool
{
SCH_CONNECTION* ac = a->Connection( m_sheet );
SCH_CONNECTION* bc = b->Connection( m_sheet );
// Ensure we don't pick the subset over the superset
if( ac->IsBus() && bc->IsBus() )
return bc->IsSubsetOf( ac );
return GetNameForDriver( a ) < GetNameForDriver( b );
} );
}
}
if( !m_driver )
m_driver = candidates[0];
}
if( strong_drivers.size() > 1 )
m_multiple_drivers = true;
// Drop weak drivers
if( m_strong_driver )
m_drivers = strong_drivers;
// Cache driver connection
if( m_driver )
m_driver_connection = m_driver->Connection( m_sheet );
else
m_driver_connection = nullptr;
if( aCreateMarkers && m_multiple_drivers )
{
// First check if all the candidates are actually the same
bool same = true;
wxString first = GetNameForDriver( candidates[0] );
SCH_ITEM* second_item = nullptr;
for( unsigned i = 1; i < candidates.size(); i++ )
{
if( GetNameForDriver( candidates[i] ) != first )
{
second_item = candidates[i];
same = false;
break;
}
}
if( !same )
{
wxPoint pos = candidates[0]->Type() == SCH_PIN_T ?
static_cast<SCH_PIN*>( candidates[0] )->GetTransformedPosition() :
candidates[0]->GetPosition();
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_DRIVER_CONFLICT );
ercItem->SetItems( candidates[0], second_item );
SCH_MARKER* marker = new SCH_MARKER( ercItem, pos );
m_sheet.LastScreen()->Append( marker );
// If aCreateMarkers is true, then this is part of ERC check, so we
// should return false even if the driver was assigned
return false;
}
}
return aCreateMarkers || ( m_driver != nullptr );
}
wxString CONNECTION_SUBGRAPH::GetNetName() const
{
if( !m_driver || m_dirty )
return "";
if( !m_driver->Connection( m_sheet ) )
{
#ifdef CONNECTIVITY_DEBUG
wxASSERT_MSG( false, "Tried to get the net name of an item with no connection" );
#endif
return "";
}
return m_driver->Connection( m_sheet )->Name();
}
std::vector<SCH_ITEM*> CONNECTION_SUBGRAPH::GetBusLabels() const
{
std::vector<SCH_ITEM*> labels;
for( SCH_ITEM* item : m_drivers )
{
switch( item->Type() )
{
case SCH_LABEL_T:
case SCH_GLOBAL_LABEL_T:
{
SCH_CONNECTION* label_conn = item->Connection( m_sheet );
// Only consider bus vectors
if( label_conn->Type() == CONNECTION_TYPE::BUS )
labels.push_back( item );
break;
}
default: break;
}
}
return labels;
}
const wxString& CONNECTION_SUBGRAPH::GetNameForDriver( SCH_ITEM* aItem )
{
if( m_driver_name_cache.count( aItem ) )
return m_driver_name_cache.at( aItem );
switch( aItem->Type() )
{
case SCH_PIN_T:
{
SCH_PIN* pin = static_cast<SCH_PIN*>( aItem );
m_driver_name_cache[aItem] = pin->GetDefaultNetName( m_sheet );
break;
}
case SCH_LABEL_T:
case SCH_GLOBAL_LABEL_T:
case SCH_HIER_LABEL_T:
case SCH_SHEET_PIN_T:
{
m_driver_name_cache[aItem] = EscapeString( static_cast<SCH_TEXT*>( aItem )->GetShownText(),
CTX_NETNAME );
break;
}
default:
wxFAIL_MSG( "Unhandled item type in GetNameForDriver" );
break;
}
return m_driver_name_cache.at( aItem );
}
void CONNECTION_SUBGRAPH::Absorb( CONNECTION_SUBGRAPH* aOther )
{
wxASSERT( m_sheet == aOther->m_sheet );
for( SCH_ITEM* item : aOther->m_items )
{
item->Connection( m_sheet )->SetSubgraphCode( m_code );
AddItem( item );
}
m_bus_neighbors.insert( aOther->m_bus_neighbors.begin(), aOther->m_bus_neighbors.end() );
m_bus_parents.insert( aOther->m_bus_parents.begin(), aOther->m_bus_parents.end() );
m_multiple_drivers |= aOther->m_multiple_drivers;
aOther->m_absorbed = true;
aOther->m_dirty = false;
aOther->m_driver = nullptr;
aOther->m_driver_connection = nullptr;
aOther->m_absorbed_by = this;
}
void CONNECTION_SUBGRAPH::AddItem( SCH_ITEM* aItem )
{
m_items.push_back( aItem );
if( aItem->Connection( m_sheet )->IsDriver() )
m_drivers.push_back( aItem );
if( aItem->Type() == SCH_SHEET_PIN_T )
m_hier_pins.push_back( static_cast<SCH_SHEET_PIN*>( aItem ) );
else if( aItem->Type() == SCH_HIER_LABEL_T )
m_hier_ports.push_back( static_cast<SCH_HIERLABEL*>( aItem ) );
}
void CONNECTION_SUBGRAPH::UpdateItemConnections()
{
if( !m_driver_connection )
return;
for( SCH_ITEM* item : m_items )
{
SCH_CONNECTION* item_conn = item->Connection( m_sheet );
if( !item_conn )
item_conn = item->InitializeConnection( m_sheet, m_graph );
if( ( m_driver_connection->IsBus() && item_conn->IsNet() ) ||
( m_driver_connection->IsNet() && item_conn->IsBus() ) )
{
continue;
}
if( item != m_driver )
{
item_conn->Clone( *m_driver_connection );
item_conn->ClearDirty();
}
}
}
CONNECTION_SUBGRAPH::PRIORITY CONNECTION_SUBGRAPH::GetDriverPriority( SCH_ITEM* aDriver )
{
if( !aDriver )
return PRIORITY::NONE;
switch( aDriver->Type() )
{
case SCH_SHEET_PIN_T: return PRIORITY::SHEET_PIN;
case SCH_HIER_LABEL_T: return PRIORITY::HIER_LABEL;
case SCH_LABEL_T: return PRIORITY::LOCAL_LABEL;
case SCH_GLOBAL_LABEL_T: return PRIORITY::GLOBAL;
case SCH_PIN_T:
{
auto sch_pin = static_cast<SCH_PIN*>( aDriver );
if( sch_pin->IsPowerConnection() )
return PRIORITY::POWER_PIN;
else
return PRIORITY::PIN;
}
default: return PRIORITY::NONE;
}
}
bool CONNECTION_GRAPH::m_allowRealTime = true;
void CONNECTION_GRAPH::Reset()
{
for( auto& subgraph : m_subgraphs )
delete subgraph;
m_items.clear();
m_subgraphs.clear();
m_driver_subgraphs.clear();
m_sheet_to_subgraphs_map.clear();
m_invisible_power_pins.clear();
m_bus_alias_cache.clear();
m_net_name_to_code_map.clear();
m_bus_name_to_code_map.clear();
m_net_code_to_subgraphs_map.clear();
m_net_name_to_subgraphs_map.clear();
m_item_to_subgraph_map.clear();
m_local_label_cache.clear();
m_global_label_cache.clear();
m_last_net_code = 1;
m_last_bus_code = 1;
m_last_subgraph_code = 1;
}
void CONNECTION_GRAPH::Recalculate( const SCH_SHEET_LIST& aSheetList, bool aUnconditional )
{
PROF_COUNTER recalc_time( "CONNECTION_GRAPH::Recalculate" );
if( aUnconditional )
Reset();
PROF_COUNTER update_items( "updateItemConnectivity" );
for( const SCH_SHEET_PATH& sheet : aSheetList )
{
std::vector<SCH_ITEM*> items;
for( SCH_ITEM* item : sheet.LastScreen()->Items() )
{
if( item->IsConnectable() && ( aUnconditional || item->IsConnectivityDirty() ) )
items.push_back( item );
}
m_items.reserve( m_items.size() + items.size() );
updateItemConnectivity( sheet, items );
// UpdateDanglingState() also adds connected items for SCH_TEXT
sheet.LastScreen()->TestDanglingEnds( &sheet );
}
if( wxLog::IsAllowedTraceMask( ConnProfileMask ) )
update_items.Show();
PROF_COUNTER build_graph( "buildConnectionGraph" );
buildConnectionGraph();
if( wxLog::IsAllowedTraceMask( ConnProfileMask ) )
build_graph.Show();
recalc_time.Stop();
if( wxLog::IsAllowedTraceMask( ConnProfileMask ) )
recalc_time.Show();
#ifndef DEBUG
// Pressure relief valve for release builds
const double max_recalc_time_msecs = 250.;
if( m_allowRealTime && ADVANCED_CFG::GetCfg().m_realTimeConnectivity &&
recalc_time.msecs() > max_recalc_time_msecs )
{
m_allowRealTime = false;
}
#endif
}
void CONNECTION_GRAPH::updateItemConnectivity( const SCH_SHEET_PATH& aSheet,
const std::vector<SCH_ITEM*>& aItemList )
{
std::map< wxPoint, std::vector<SCH_ITEM*> > connection_map;
for( SCH_ITEM* item : aItemList )
{
std::vector< wxPoint > points;
item->GetConnectionPoints( points );
item->ConnectedItems( aSheet ).clear();
if( item->Type() == SCH_SHEET_T )
{
for( SCH_SHEET_PIN* pin : static_cast<SCH_SHEET*>( item )->GetPins() )
{
if( !pin->Connection( aSheet ) )
pin->InitializeConnection( aSheet, this );
pin->ConnectedItems( aSheet ).clear();
pin->Connection( aSheet )->Reset();
connection_map[ pin->GetTextPos() ].push_back( pin );
m_items.emplace_back( pin );
}
}
else if( item->Type() == SCH_COMPONENT_T )
{
SCH_COMPONENT* component = static_cast<SCH_COMPONENT*>( item );
// TODO(JE) right now this relies on GetSchPins() returning good SCH_PIN pointers
// that contain good LIB_PIN pointers. Since these get invalidated whenever the
// library component is refreshed, the current solution as of ed025972 is to just
// rebuild the SCH_PIN list when the component is refreshed, and then re-run the
// connectivity calculations. This is slow and should be improved before release.
// See https://gitlab.com/kicad/code/kicad/issues/3784
for( SCH_PIN* pin : component->GetSchPins( &aSheet ) )
{
pin->InitializeConnection( aSheet, this );
wxPoint pos = pin->GetPosition();
// because calling the first time is not thread-safe
pin->GetDefaultNetName( aSheet );
pin->ConnectedItems( aSheet ).clear();
// Invisible power pins need to be post-processed later
if( pin->IsPowerConnection() && !pin->IsVisible() )
m_invisible_power_pins.emplace_back( std::make_pair( aSheet, pin ) );
connection_map[ pos ].push_back( pin );
m_items.emplace_back( pin );
}
}
else
{
m_items.emplace_back( item );
auto conn = item->InitializeConnection( aSheet, this );
// Set bus/net property here so that the propagation code uses it
switch( item->Type() )
{
case SCH_LINE_T:
conn->SetType( item->GetLayer() == LAYER_BUS ? CONNECTION_TYPE::BUS :
CONNECTION_TYPE::NET );
break;
case SCH_BUS_BUS_ENTRY_T:
conn->SetType( CONNECTION_TYPE::BUS );
// clean previous (old) links:
static_cast<SCH_BUS_BUS_ENTRY*>( item )->m_connected_bus_items[0] = nullptr;
static_cast<SCH_BUS_BUS_ENTRY*>( item )->m_connected_bus_items[1] = nullptr;
break;
case SCH_PIN_T:
conn->SetType( CONNECTION_TYPE::NET );
break;
case SCH_BUS_WIRE_ENTRY_T:
conn->SetType( CONNECTION_TYPE::NET );
// clean previous (old) link:
static_cast<SCH_BUS_WIRE_ENTRY*>( item )->m_connected_bus_item = nullptr;
break;
default:
break;
}
for( const wxPoint& point : points )
connection_map[ point ].push_back( item );
}
item->SetConnectivityDirty( false );
}
for( const auto& it : connection_map )
{
auto connection_vec = it.second;
for( auto primary_it = connection_vec.begin(); primary_it != connection_vec.end(); primary_it++ )
{
SCH_ITEM* connected_item = *primary_it;
// Bus entries are special: they can have connection points in the
// middle of a wire segment, because the junction algo doesn't split
// the segment in two where you place a bus entry. This means that
// bus entries that don't land on the end of a line segment need to
// have "virtual" connection points to the segments they graphically
// touch.
if( connected_item->Type() == SCH_BUS_WIRE_ENTRY_T )
{
// If this location only has the connection point of the bus
// entry itself, this means that either the bus entry is not
// connected to anything graphically, or that it is connected to
// a segment at some point other than at one of the endpoints.
if( connection_vec.size() == 1 )
{
SCH_SCREEN* screen = aSheet.LastScreen();
SCH_LINE* bus = screen->GetBus( it.first );
if( bus )
{
auto bus_entry = static_cast<SCH_BUS_WIRE_ENTRY*>( connected_item );
bus_entry->m_connected_bus_item = bus;
}
}
}
// Bus-to-bus entries are treated just like bus wires
else if( connected_item->Type() == SCH_BUS_BUS_ENTRY_T )
{
if( connection_vec.size() < 2 )
{
SCH_SCREEN* screen = aSheet.LastScreen();
SCH_LINE* bus = screen->GetBus( it.first );
if( bus )
{
auto bus_entry = static_cast<SCH_BUS_BUS_ENTRY*>( connected_item );
if( it.first == bus_entry->GetPosition() )
bus_entry->m_connected_bus_items[0] = bus;
else
bus_entry->m_connected_bus_items[1] = bus;
bus_entry->ConnectedItems( aSheet ).insert( bus );
bus->ConnectedItems( aSheet ).insert( bus_entry );
}
}
}
// Change junctions to be on bus junction layer if they are touching a bus
else if( connected_item->Type() == SCH_JUNCTION_T )
{
SCH_SCREEN* screen = aSheet.LastScreen();
SCH_LINE* bus = screen->GetBus( it.first );
connected_item->SetLayer( bus ? LAYER_BUS_JUNCTION : LAYER_JUNCTION );
}
for( auto test_it = primary_it + 1; test_it != connection_vec.end(); test_it++ )
{
auto test_item = *test_it;
if( connected_item != test_item &&
connected_item->ConnectionPropagatesTo( test_item ) &&
test_item->ConnectionPropagatesTo( connected_item ) )
{
connected_item->ConnectedItems( aSheet ).insert( test_item );
test_item->ConnectedItems( aSheet ).insert( connected_item );
}
// Set up the link between the bus entry net and the bus
if( connected_item->Type() == SCH_BUS_WIRE_ENTRY_T )
{
if( test_item->Connection( aSheet )->IsBus() )
{
auto bus_entry = static_cast<SCH_BUS_WIRE_ENTRY*>( connected_item );
bus_entry->m_connected_bus_item = test_item;
}
}
}
// If we got this far and did not find a connected bus item for a bus entry,
// we should do a manual scan in case there is a bus item on this connection
// point but we didn't pick it up earlier because there is *also* a net item here.
if( connected_item->Type() == SCH_BUS_WIRE_ENTRY_T )
{
auto bus_entry = static_cast<SCH_BUS_WIRE_ENTRY*>( connected_item );
if( !bus_entry->m_connected_bus_item )
{
auto screen = aSheet.LastScreen();
auto bus = screen->GetBus( it.first );
if( bus )
bus_entry->m_connected_bus_item = bus;
}
}
}
}
}
// TODO(JE) This won't give the same subgraph IDs (and eventually net/graph codes)
// to the same subgraph necessarily if it runs over and over again on the same
// sheet. We need:
//
// a) a cache of net/bus codes, like used before
// b) to persist the CONNECTION_GRAPH globally so the cache is persistent,
// c) some way of trying to avoid changing net names. so we should keep track
// of the previous driver of a net, and if it comes down to choosing between
// equally-prioritized drivers, choose the one that already exists as a driver
// on some portion of the items.
void CONNECTION_GRAPH::buildConnectionGraph()
{
// Recache all bus aliases for later use
wxCHECK_RET( m_schematic, "Connection graph cannot be built without schematic pointer" );
SCH_SHEET_LIST all_sheets = m_schematic->GetSheets();
for( unsigned i = 0; i < all_sheets.size(); i++ )
{
for( const auto& alias : all_sheets[i].LastScreen()->GetBusAliases() )
m_bus_alias_cache[ alias->GetName() ] = alias;
}
// Build subgraphs from items (on a per-sheet basis)
for( SCH_ITEM* item : m_items )
{
for( const auto& it : item->m_connection_map )
{
const auto sheet = it.first;
auto connection = it.second;
if( connection->SubgraphCode() == 0 )
{
auto subgraph = new CONNECTION_SUBGRAPH( this );
subgraph->m_code = m_last_subgraph_code++;
subgraph->m_sheet = sheet;
subgraph->AddItem( item );
connection->SetSubgraphCode( subgraph->m_code );
m_item_to_subgraph_map[item] = subgraph;
std::list<SCH_ITEM*> members;
auto get_items =
[&]( SCH_ITEM* aItem ) -> bool
{
auto* conn = aItem->Connection( sheet );
if( !conn )
conn = aItem->InitializeConnection( sheet, this );
return ( conn->SubgraphCode() == 0 );
};
std::copy_if( item->ConnectedItems( sheet ).begin(),
item->ConnectedItems( sheet ).end(),
std::back_inserter( members ), get_items );
for( auto connected_item : members )
{
if( connected_item->Type() == SCH_NO_CONNECT_T )
subgraph->m_no_connect = connected_item;
auto connected_conn = connected_item->Connection( sheet );
wxASSERT( connected_conn );
if( connected_conn->SubgraphCode() == 0 )
{
connected_conn->SetSubgraphCode( subgraph->m_code );
m_item_to_subgraph_map[connected_item] = subgraph;
subgraph->AddItem( connected_item );
std::copy_if( connected_item->ConnectedItems( sheet ).begin(),
connected_item->ConnectedItems( sheet ).end(),
std::back_inserter( members ), get_items );
}
}
subgraph->m_dirty = true;
m_subgraphs.push_back( subgraph );
}
}
}
/**
* TODO(JE)
*
* It would be good if net codes were preserved as much as possible when
* generating netlists, so that unnamed nets don't keep shifting around when
* you regenerate.
*
* Right now, we are clearing out the old connections up in
* UpdateItemConnectivity(), but that is useful information, so maybe we
* need to just set the dirty flag or something.
*
* That way, ResolveDrivers() can check what the driver of the subgraph was
* previously, and if it is in the situation of choosing between equal
* candidates for an auto-generated net name, pick the previous one.
*
* N.B. the old algorithm solves this by sorting the possible net names
* alphabetically, so as long as the same refdes components are involved,
* the net will be the same.
*/
// Resolve drivers for subgraphs and propagate connectivity info
// We don't want to spin up a new thread for fewer than 8 nets (overhead costs)
size_t parallelThreadCount = std::min<size_t>( std::thread::hardware_concurrency(),
( m_subgraphs.size() + 3 ) / 4 );
std::atomic<size_t> nextSubgraph( 0 );
std::vector<std::future<size_t>> returns( parallelThreadCount );
std::vector<CONNECTION_SUBGRAPH*> dirty_graphs;
std::copy_if( m_subgraphs.begin(), m_subgraphs.end(), std::back_inserter( dirty_graphs ),
[&] ( const CONNECTION_SUBGRAPH* candidate )
{
return candidate->m_dirty;
} );
auto update_lambda = [&nextSubgraph, &dirty_graphs]() -> size_t
{
for( size_t subgraphId = nextSubgraph++; subgraphId < dirty_graphs.size(); subgraphId = nextSubgraph++ )
{
auto subgraph = dirty_graphs[subgraphId];
if( !subgraph->m_dirty )
continue;
// Special processing for some items
for( auto item : subgraph->m_items )
{
switch( item->Type() )
{
case SCH_NO_CONNECT_T:
subgraph->m_no_connect = item;
break;
case SCH_BUS_WIRE_ENTRY_T:
subgraph->m_bus_entry = item;
break;
case SCH_PIN_T:
{
auto pin = static_cast<SCH_PIN*>( item );
if( pin->GetType() == ELECTRICAL_PINTYPE::PT_NC )
subgraph->m_no_connect = item;
break;
}
default:
break;
}
}
if( !subgraph->ResolveDrivers() )
{
subgraph->m_dirty = false;
}
else
{
// Now the subgraph has only one driver
SCH_ITEM* driver = subgraph->m_driver;
SCH_SHEET_PATH sheet = subgraph->m_sheet;
SCH_CONNECTION* connection = driver->Connection( sheet );
connection->ConfigureFromLabel( subgraph->GetNameForDriver( driver ) );
connection->SetDriver( driver );
connection->ClearDirty();
subgraph->m_dirty = false;
}
}
return 1;
};
if( parallelThreadCount == 1 )
update_lambda();
else
{
for( size_t ii = 0; ii < parallelThreadCount; ++ii )
returns[ii] = std::async( std::launch::async, update_lambda );
// Finalize the threads
for( size_t ii = 0; ii < parallelThreadCount; ++ii )
returns[ii].wait();
}
// Now discard any non-driven subgraphs from further consideration
std::copy_if( m_subgraphs.begin(), m_subgraphs.end(), std::back_inserter( m_driver_subgraphs ),
[&] ( const CONNECTION_SUBGRAPH* candidate ) -> bool
{
return candidate->m_driver;
} );
// Check for subgraphs with the same net name but only weak drivers.
// For example, two wires that are both connected to hierarchical
// sheet pins that happen to have the same name, but are not the same.
for( auto&& subgraph : m_driver_subgraphs )
{
wxString full_name = subgraph->m_driver_connection->Name();
wxString name = subgraph->m_driver_connection->Name( true );
m_net_name_to_subgraphs_map[full_name].emplace_back( subgraph );
subgraph->m_dirty = true;
if( subgraph->m_strong_driver )
{
SCH_ITEM* driver = subgraph->m_driver;
SCH_SHEET_PATH sheet = subgraph->m_sheet;
switch( driver->Type() )
{
case SCH_LABEL_T:
case SCH_HIER_LABEL_T:
{
m_local_label_cache[std::make_pair( sheet, name )].push_back( subgraph );
break;
}
case SCH_GLOBAL_LABEL_T:
{
m_global_label_cache[name].push_back( subgraph );
break;
}
case SCH_PIN_T:
{
auto pin = static_cast<SCH_PIN*>( driver );
wxASSERT( pin->IsPowerConnection() );
m_global_label_cache[name].push_back( subgraph );
break;
}
default:
wxLogTrace( "CONN", "Unexpected strong driver %s",
driver->GetSelectMenuText( EDA_UNITS::MILLIMETRES ) );
break;
}
}
}
// Generate subgraphs for invisible power pins. These will be merged with other subgraphs
// on the same sheet in the next loop.
std::unordered_map<int, CONNECTION_SUBGRAPH*> invisible_pin_subgraphs;
for( const auto& it : m_invisible_power_pins )
{
SCH_SHEET_PATH sheet = it.first;
SCH_PIN* pin = it.second;
if( !pin->ConnectedItems( sheet ).empty() && !pin->GetLibPin()->GetParent()->IsPower() )
{
// ERC will warn about this: user has wired up an invisible pin
continue;
}
SCH_CONNECTION* connection = pin->Connection( sheet );
if( !connection )
connection = pin->InitializeConnection( sheet, this );
// If this pin already has a subgraph, don't need to process
if( connection->SubgraphCode() > 0 )
continue;
connection->SetName( pin->GetName() );
int code = assignNewNetCode( *connection );
connection->SetNetCode( code );
CONNECTION_SUBGRAPH* subgraph;
if( invisible_pin_subgraphs.count( code ) )
{
subgraph = invisible_pin_subgraphs.at( code );
subgraph->AddItem( pin );
}
else
{
subgraph = new CONNECTION_SUBGRAPH( this );
subgraph->m_code = m_last_subgraph_code++;
subgraph->m_sheet = sheet;
subgraph->AddItem( pin );
subgraph->ResolveDrivers();
auto key = std::make_pair( subgraph->GetNetName(), code );
m_net_code_to_subgraphs_map[ key ].push_back( subgraph );
m_subgraphs.push_back( subgraph );
m_driver_subgraphs.push_back( subgraph );
invisible_pin_subgraphs[code] = subgraph;
}
connection->SetSubgraphCode( subgraph->m_code );
}
for( auto it : invisible_pin_subgraphs )
it.second->UpdateItemConnections();
// Here we do all the local (sheet) processing of each subgraph, including assigning net
// codes, merging subgraphs together that use label connections, etc.
// Cache remaining valid subgraphs by sheet path
for( auto subgraph : m_driver_subgraphs )
m_sheet_to_subgraphs_map[ subgraph->m_sheet ].emplace_back( subgraph );
std::unordered_set<CONNECTION_SUBGRAPH*> invalidated_subgraphs;
for( CONNECTION_SUBGRAPH* subgraph : m_driver_subgraphs )
{
if( subgraph->m_absorbed )
continue;
SCH_CONNECTION* connection = subgraph->m_driver_connection;
SCH_SHEET_PATH sheet = subgraph->m_sheet;
wxString name = connection->Name();
// Test subgraphs with weak drivers for net name conflicts and fix them
unsigned suffix = 1;
auto create_new_name = [&] ( SCH_CONNECTION* aConn, wxString aName ) -> wxString
{
wxString new_name = wxString::Format( "%s_%u", aName, suffix );
aConn->SetSuffix( wxString::Format( "_%u", suffix ) );
suffix++;
return new_name;
};
if( !subgraph->m_strong_driver )
{
auto& vec = m_net_name_to_subgraphs_map.at( name );
if( vec.size() > 1 )
{
wxString new_name = create_new_name( connection, name );
while( m_net_name_to_subgraphs_map.count( new_name ) )
new_name = create_new_name( connection, name );
wxLogTrace( "CONN", "%ld (%s) is weakly driven and not unique. Changing to %s.",
subgraph->m_code, name, new_name );
vec.erase( std::remove( vec.begin(), vec.end(), subgraph ), vec.end() );
m_net_name_to_subgraphs_map[new_name].emplace_back( subgraph );
name = new_name;
subgraph->UpdateItemConnections();
}
else
{
// If there is no conflict, promote sheet pins to be strong drivers so that they
// will be considered below for propagation/merging.
// It is possible for this to generate a conflict if the sheet pin has the same
// name as a global label on the same sheet, because global merging will then treat
// this subgraph as if it had a matching local label. So, for those cases, we
// don't apply this promotion
if( subgraph->m_driver->Type() == SCH_SHEET_PIN_T )
{
bool conflict = false;
wxString global_name = connection->Name( true );
size_t count = m_net_name_to_subgraphs_map.count( global_name );
if( count )
{
// A global will conflict if it is on the same sheet as this subgraph, since
// it would be connected by implicit local label linking
auto& candidates = m_net_name_to_subgraphs_map.at( global_name );
for( const auto& candidate : candidates )
{
if( candidate->m_sheet == sheet )
conflict = true;
}
}
if( conflict )
{
wxLogTrace( "CONN",
"%ld (%s) skipped for promotion due to potential conflict",
subgraph->m_code, name );
}
else
{
wxLogTrace( "CONN",
"%ld (%s) weakly driven by unique sheet pin %s, promoting",
subgraph->m_code, name,
subgraph->m_driver->GetSelectMenuText( EDA_UNITS::MILLIMETRES ) );
subgraph->m_strong_driver = true;
}
}
}
}
// Assign net codes
if( connection->IsBus() )
{
int code = -1;
if( m_bus_name_to_code_map.count( name ) )
{
code = m_bus_name_to_code_map.at( name );
}
else
{
code = m_last_bus_code++;
m_bus_name_to_code_map[ name ] = code;
}
connection->SetBusCode( code );
assignNetCodesToBus( connection );
}
else
{
assignNewNetCode( *connection );
}
subgraph->UpdateItemConnections();
// Reset the flag for the next loop below
subgraph->m_dirty = true;
// Next, we merge together subgraphs that have label connections, and create
// neighbor links for subgraphs that are part of a bus on the same sheet.
// For merging, we consider each possible strong driver.
// If this subgraph doesn't have a strong driver, let's skip it, since there is no
// way it will be merged with anything.
if( !subgraph->m_strong_driver )
continue;
// candidate_subgraphs will contain each valid, non-bus subgraph on the same sheet
// as the subgraph we are considering that has a strong driver.
// Weakly driven subgraphs are not considered since they will never be absorbed or
// form neighbor links.
std::vector<CONNECTION_SUBGRAPH*> candidate_subgraphs;
std::copy_if( m_sheet_to_subgraphs_map[ subgraph->m_sheet ].begin(),
m_sheet_to_subgraphs_map[ subgraph->m_sheet ].end(),
std::back_inserter( candidate_subgraphs ),
[&] ( const CONNECTION_SUBGRAPH* candidate )
{
return ( !candidate->m_absorbed &&
candidate->m_strong_driver &&
candidate != subgraph );
} );
// This is a list of connections on the current subgraph to compare to the
// drivers of each candidate subgraph. If the current subgraph is a bus,
// we should consider each bus member.
std::vector< std::shared_ptr<SCH_CONNECTION> > connections_to_check;
// Also check the main driving connection
connections_to_check.push_back( std::make_shared<SCH_CONNECTION>( *connection ) );
auto add_connections_to_check = [&] ( CONNECTION_SUBGRAPH* aSubgraph ) {
for( SCH_ITEM* possible_driver : aSubgraph->m_items )
{
if( possible_driver == aSubgraph->m_driver )
continue;
auto c = getDefaultConnection( possible_driver, aSubgraph );
if( c )
{
if( c->Type() != aSubgraph->m_driver_connection->Type() )
continue;
if( c->Name( true ) == aSubgraph->m_driver_connection->Name( true ) )
continue;
connections_to_check.push_back( c );
wxLogTrace( "CONN", "%lu (%s): Adding secondary driver %s", aSubgraph->m_code,
aSubgraph->m_driver_connection->Name( true ), c->Name( true ) );
}
}
};
// Now add other strong drivers
// The actual connection attached to these items will have been overwritten
// by the chosen driver of the subgraph, so we need to create a dummy connection
add_connections_to_check( subgraph );
for( unsigned i = 0; i < connections_to_check.size(); i++ )
{
auto member = connections_to_check[i];
if( member->IsBus() )
{
connections_to_check.insert( connections_to_check.end(),
member->Members().begin(),
member->Members().end() );
}
wxString test_name = member->Name( true );
for( auto candidate : candidate_subgraphs )
{
if( candidate->m_absorbed )
continue;
bool match = false;
if( candidate->m_driver_connection->Name( true ) == test_name )
{
match = true;
}
else
{
if( !candidate->m_multiple_drivers )
continue;
for( SCH_ITEM *driver : candidate->m_drivers )
{
if( driver == candidate->m_driver )
continue;
// Sheet pins are not candidates for merging
if( driver->Type() == SCH_SHEET_PIN_T )
continue;
if( driver->Type() == SCH_PIN_T )
{
auto pin = static_cast<SCH_PIN*>( driver );
if( pin->IsPowerConnection() && pin->GetName() == test_name )
{
match = true;
break;
}
}
else
{
wxASSERT( driver->Type() == SCH_LABEL_T ||
driver->Type() == SCH_GLOBAL_LABEL_T ||
driver->Type() == SCH_HIER_LABEL_T );
if( subgraph->GetNameForDriver( driver ) == test_name )
{
match = true;
break;
}
}
}
}
if( match )
{
if( connection->IsBus() && candidate->m_driver_connection->IsNet() )
{
wxLogTrace( "CONN", "%lu (%s) has bus child %lu (%s)", subgraph->m_code,
connection->Name(), candidate->m_code, member->Name() );
subgraph->m_bus_neighbors[member].insert( candidate );
candidate->m_bus_parents[member].insert( subgraph );
}
else
{
wxLogTrace( "CONN", "%lu (%s) absorbs neighbor %lu (%s)",
subgraph->m_code, connection->Name(),
candidate->m_code, candidate->m_driver_connection->Name() );
// Candidate may have other non-chosen drivers we need to follow
add_connections_to_check( candidate );
subgraph->Absorb( candidate );
invalidated_subgraphs.insert( subgraph );
}
}
}
}
}
// Update any subgraph that was invalidated above
for( auto subgraph : invalidated_subgraphs )
{
if( subgraph->m_absorbed )
continue;
subgraph->ResolveDrivers();
if( subgraph->m_driver_connection->IsBus() )
assignNetCodesToBus( subgraph->m_driver_connection );
else
assignNewNetCode( *subgraph->m_driver_connection );
subgraph->UpdateItemConnections();
wxLogTrace( "CONN", "Re-resolving drivers for %lu (%s)", subgraph->m_code,
subgraph->m_driver_connection->Name() );
}
// Absorbed subgraphs should no longer be considered
m_driver_subgraphs.erase( std::remove_if( m_driver_subgraphs.begin(), m_driver_subgraphs.end(),
[&] ( const CONNECTION_SUBGRAPH* candidate ) -> bool
{
return candidate->m_absorbed;
} ),
m_driver_subgraphs.end() );
// Store global subgraphs for later reference
std::vector<CONNECTION_SUBGRAPH*> global_subgraphs;
std::copy_if( m_driver_subgraphs.begin(), m_driver_subgraphs.end(),
std::back_inserter( global_subgraphs ),
[&] ( const CONNECTION_SUBGRAPH* candidate ) -> bool
{
return !candidate->m_local_driver;
} );
// Recache remaining valid subgraphs by sheet path
m_sheet_to_subgraphs_map.clear();
for( auto subgraph : m_driver_subgraphs )
m_sheet_to_subgraphs_map[ subgraph->m_sheet ].emplace_back( subgraph );
// Next time through the subgraphs, we do some post-processing to handle things like
// connecting bus members to their neighboring subgraphs, and then propagate connections
// through the hierarchy
for( auto subgraph : m_driver_subgraphs )
{
if( !subgraph->m_dirty )
continue;
// For subgraphs that are driven by a global (power port or label) and have more
// than one global driver, we need to seek out other subgraphs driven by the
// same name as the non-chosen driver and update them to match the chosen one.
if( !subgraph->m_local_driver && subgraph->m_multiple_drivers )
{
for( SCH_ITEM* driver : subgraph->m_drivers )
{
if( driver == subgraph->m_driver )
continue;
wxString secondary_name = subgraph->GetNameForDriver( driver );
if( secondary_name == subgraph->m_driver_connection->Name() )
continue;
bool secondary_is_global = CONNECTION_SUBGRAPH::GetDriverPriority( driver )
>= CONNECTION_SUBGRAPH::PRIORITY::POWER_PIN;
for( CONNECTION_SUBGRAPH* candidate : global_subgraphs )
{
if( candidate == subgraph )
continue;
if( !secondary_is_global && candidate->m_sheet != subgraph->m_sheet )
continue;
SCH_CONNECTION* conn = candidate->m_driver_connection;
if( conn->Name() == secondary_name )
{
wxLogTrace( "CONN", "Global %lu (%s) promoted to %s", candidate->m_code,
conn->Name(), subgraph->m_driver_connection->Name() );
conn->Clone( *subgraph->m_driver_connection );
candidate->UpdateItemConnections();
candidate->m_dirty = false;
}
}
}
}
// This call will handle descending the hierarchy and updating child subgraphs
propagateToNeighbors( subgraph );
}
// Handle buses that have been linked together somewhere by member (net) connections.
// This feels a bit hacky, perhaps this algorithm should be revisited in the future.
// For net subgraphs that have more than one bus parent, we need to ensure that those
// buses are linked together in the final netlist. The final name of each bus might not
// match the local name that was used to establish the parent-child relationship, because
// the bus may have been renamed by a hierarchical connection. So, for each of these cases,
// we need to identify the appropriate bus members to link together (and their final names),
// and then update all instances of the old name in the hierarchy.
for( CONNECTION_SUBGRAPH* subgraph : m_driver_subgraphs )
{
if( subgraph->m_bus_parents.size() < 2 )
continue;
SCH_CONNECTION* conn = subgraph->m_driver_connection;
wxLogTrace( "CONN", "%lu (%s) has multiple bus parents", subgraph->m_code, conn->Name() );
wxASSERT( conn->IsNet() );
for( const auto& it : subgraph->m_bus_parents )
{
SCH_CONNECTION* link_member = it.first.get();
for( CONNECTION_SUBGRAPH* parent : it.second )
{
while( parent->m_absorbed )
parent = parent->m_absorbed_by;
SCH_CONNECTION* match = matchBusMember( parent->m_driver_connection, link_member );
if( !match )
{
wxLogTrace( "CONN", "Warning: could not match %s inside %lu (%s)", conn->Name(),
parent->m_code, parent->m_driver_connection->Name() );
continue;
}
if( conn->Name() != match->Name() )
{
wxString old_name = match->Name();
wxLogTrace( "CONN", "Updating %lu (%s) member %s to %s", parent->m_code,
parent->m_driver_connection->Name(), old_name, conn->Name() );
match->Clone( *conn );
if( !m_net_name_to_subgraphs_map.count( old_name ) )
continue;
for( CONNECTION_SUBGRAPH* old_sg : m_net_name_to_subgraphs_map.at( old_name ) )
{
while( old_sg->m_absorbed )
old_sg = old_sg->m_absorbed_by;
old_sg->m_driver_connection->Clone( *conn );
old_sg->UpdateItemConnections();
}
}
}
}
}
m_net_code_to_subgraphs_map.clear();
m_net_name_to_subgraphs_map.clear();
for( CONNECTION_SUBGRAPH* subgraph : m_driver_subgraphs )
{
// Every driven subgraph should have been marked by now
if( subgraph->m_dirty )
{
// TODO(JE) this should be caught by hierarchical sheet port/pin ERC, check this
// Reset to false so no complaints come up later
subgraph->m_dirty = false;
}
if( subgraph->m_driver_connection->IsBus() )
{
// No other processing to do on buses
continue;
}
else
{
// As a visual aid, we can check sheet pins that are driven by themselves to see
// if they should be promoted to buses
if( subgraph->m_driver->Type() == SCH_SHEET_PIN_T )
{
SCH_SHEET_PIN* pin = static_cast<SCH_SHEET_PIN*>( subgraph->m_driver );
if( SCH_SHEET* sheet = pin->GetParent() )
{
wxString pinText = pin->GetText();
for( auto item : sheet->GetScreen()->Items().OfType( SCH_HIER_LABEL_T ) )
{
auto label = static_cast<SCH_HIERLABEL*>( item );
if( label->GetText() == pinText )
{
SCH_SHEET_PATH path = subgraph->m_sheet;
path.push_back( sheet );
SCH_CONNECTION* parent_conn = label->Connection( path );
if( parent_conn && parent_conn->IsBus() )
subgraph->m_driver_connection->SetType( CONNECTION_TYPE::BUS );
break;
}
}
if( subgraph->m_driver_connection->IsBus() )
continue;
}
}
}
auto key = std::make_pair( subgraph->GetNetName(),
subgraph->m_driver_connection->NetCode() );
m_net_code_to_subgraphs_map[ key ].push_back( subgraph );
m_net_name_to_subgraphs_map[subgraph->m_driver_connection->Name()].push_back( subgraph );
}
// Clean up and deallocate stale subgraphs
m_subgraphs.erase( std::remove_if( m_subgraphs.begin(), m_subgraphs.end(),
[&]( const CONNECTION_SUBGRAPH* sg )
{
if( sg->m_absorbed )
{
delete sg;
return true;
}
else
{
return false;
}
} ),
m_subgraphs.end() );
}
int CONNECTION_GRAPH::assignNewNetCode( SCH_CONNECTION& aConnection )
{
int code;
if( m_net_name_to_code_map.count( aConnection.Name() ) )
{
code = m_net_name_to_code_map.at( aConnection.Name() );
}
else
{
code = m_last_net_code++;
m_net_name_to_code_map[ aConnection.Name() ] = code;
}
aConnection.SetNetCode( code );
return code;
}
void CONNECTION_GRAPH::assignNetCodesToBus( SCH_CONNECTION* aConnection )
{
auto connections_to_check( aConnection->Members() );
for( unsigned i = 0; i < connections_to_check.size(); i++ )
{
auto member = connections_to_check[i];
if( member->IsBus() )
{
connections_to_check.insert( connections_to_check.end(),
member->Members().begin(),
member->Members().end() );
continue;
}
assignNewNetCode( *member );
}
}
void CONNECTION_GRAPH::propagateToNeighbors( CONNECTION_SUBGRAPH* aSubgraph )
{
SCH_CONNECTION* conn = aSubgraph->m_driver_connection;
std::vector<CONNECTION_SUBGRAPH*> search_list;
std::unordered_set<CONNECTION_SUBGRAPH*> visited;
std::vector<SCH_CONNECTION*> stale_bus_members;
auto visit = [&] ( CONNECTION_SUBGRAPH* aParent ) {
for( SCH_SHEET_PIN* pin : aParent->m_hier_pins )
{
SCH_SHEET_PATH path = aParent->m_sheet;
path.push_back( pin->GetParent() );
if( !m_sheet_to_subgraphs_map.count( path ) )
continue;
for( CONNECTION_SUBGRAPH* candidate : m_sheet_to_subgraphs_map.at( path ) )
{
if( !candidate->m_strong_driver ||
candidate->m_hier_ports.empty() ||
visited.count( candidate ) )
continue;
for( SCH_HIERLABEL* label : candidate->m_hier_ports )
{
if( candidate->GetNameForDriver( label ) == aParent->GetNameForDriver( pin ) )
{
wxLogTrace( "CONN", "%lu: found child %lu (%s)", aParent->m_code,
candidate->m_code, candidate->m_driver_connection->Name() );
candidate->m_hier_parent = aParent;
search_list.push_back( candidate );
break;
}
}
}
}
for( SCH_HIERLABEL* label : aParent->m_hier_ports )
{
SCH_SHEET_PATH path = aParent->m_sheet;
path.pop_back();
if( !m_sheet_to_subgraphs_map.count( path ) )
continue;
for( CONNECTION_SUBGRAPH* candidate : m_sheet_to_subgraphs_map.at( path ) )
{
if( candidate->m_hier_pins.empty() ||
visited.count( candidate ) ||
( candidate->m_driver_connection->Type() !=
aParent->m_driver_connection->Type() ) )
continue;
for( SCH_SHEET_PIN* pin : candidate->m_hier_pins )
{
SCH_SHEET_PATH pin_path = path;
pin_path.push_back( pin->GetParent() );
if( pin_path != aParent->m_sheet )
continue;
if( aParent->GetNameForDriver( label ) == candidate->GetNameForDriver( pin ) )
{
wxLogTrace( "CONN", "%lu: found additional parent %lu (%s)",
aParent->m_code, candidate->m_code,
candidate->m_driver_connection->Name() );
search_list.push_back( candidate );
break;
}
}
}
}
};
auto propagate_bus_neighbors = [&]( CONNECTION_SUBGRAPH* aParentGraph ) {
for( const auto& kv : aParentGraph->m_bus_neighbors )
{
for( CONNECTION_SUBGRAPH* neighbor : kv.second )
{
// May have been absorbed but won't have been deleted
while( neighbor->m_absorbed )
neighbor = neighbor->m_absorbed_by;
SCH_CONNECTION* parent = aParentGraph->m_driver_connection;
// Now member may be out of date, since we just cloned the
// connection from higher up in the hierarchy. We need to
// figure out what the actual new connection is.
SCH_CONNECTION* member = matchBusMember( parent, kv.first.get() );
if( !member )
{
// Try harder: we might match on a secondary driver
for( CONNECTION_SUBGRAPH* sg : kv.second )
{
if( sg->m_multiple_drivers )
{
SCH_SHEET_PATH sheet = sg->m_sheet;
for( SCH_ITEM* driver : sg->m_drivers )
{
auto c = getDefaultConnection( driver, sg );
member = matchBusMember( parent, c.get() );
if( member )
break;
}
}
if( member )
break;
}
}
// This is bad, probably an ERC error
if( !member )
{
wxLogTrace( "CONN", "Could not match bus member %s in %s",
kv.first->Name(), parent->Name() );
continue;
}
auto neighbor_conn = neighbor->m_driver_connection;
auto neighbor_name = neighbor_conn->Name();
// Matching name: no update needed
if( neighbor_name == member->Name() )
continue;
// Safety check against infinite recursion
wxASSERT( neighbor_conn->IsNet() );
wxLogTrace( "CONN", "%lu (%s) connected to bus member %s (local %s)",
neighbor->m_code, neighbor_name, member->Name(), member->LocalName() );
// Take whichever name is higher priority
if( CONNECTION_SUBGRAPH::GetDriverPriority( neighbor->m_driver )
>= CONNECTION_SUBGRAPH::PRIORITY::POWER_PIN )
{
member->Clone( *neighbor_conn );
stale_bus_members.push_back( member );
}
else
{
neighbor_conn->Clone( *member );
neighbor->UpdateItemConnections();
recacheSubgraphName( neighbor, neighbor_name );
// Recurse onto this neighbor in case it needs to re-propagate
neighbor->m_dirty = true;
propagateToNeighbors( neighbor );
}
}
}
};
// If we are a bus, we must propagate to local neighbors and then the hierarchy
if( conn->IsBus() )
propagate_bus_neighbors( aSubgraph );
// If we don't have any hier pins (i.e. no children), nothing to do
if( aSubgraph->m_hier_pins.empty() )
{
// If we also don't have any parents, we'll never be visited again
if( aSubgraph->m_hier_ports.empty() )
aSubgraph->m_dirty = false;
return;
}
// If we do have hier ports, skip this subgraph as it will be visited by a parent
// TODO(JE) this will leave the subgraph dirty if there is no matching parent subgraph,
// which should be flagged as an ERC error
if( !aSubgraph->m_hier_ports.empty() )
return;
visited.insert( aSubgraph );
wxLogTrace( "CONN", "Propagating %lu (%s) to subsheets",
aSubgraph->m_code, aSubgraph->m_driver_connection->Name() );
visit( aSubgraph );
for( unsigned i = 0; i < search_list.size(); i++ )
{
auto child = search_list[i];
visited.insert( child );
visit( child );
child->m_dirty = false;
}
// Now, find the best driver for this chain of subgraphs
CONNECTION_SUBGRAPH* driver = aSubgraph;
CONNECTION_SUBGRAPH::PRIORITY highest =
CONNECTION_SUBGRAPH::GetDriverPriority( aSubgraph->m_driver );
// Check if a subsheet has a higher-priority connection to the same net
if( highest < CONNECTION_SUBGRAPH::PRIORITY::POWER_PIN )
{
for( CONNECTION_SUBGRAPH* subgraph : visited )
{
CONNECTION_SUBGRAPH::PRIORITY priority =
CONNECTION_SUBGRAPH::GetDriverPriority( subgraph->m_driver );
// Upgrade driver to be this subgraph if this subgraph has a power pin or global
// Also upgrade if we found something with a shorter sheet path (higher in hierarchy)
// but with an equivalent priority
if( ( priority >= CONNECTION_SUBGRAPH::PRIORITY::POWER_PIN ) ||
( priority >= highest && subgraph->m_sheet.size() < aSubgraph->m_sheet.size() ) )
driver = subgraph;
}
}
if( driver != aSubgraph )
{
wxLogTrace( "CONN", "%lu (%s) overridden by new driver %lu (%s)",
aSubgraph->m_code, aSubgraph->m_driver_connection->Name(),
driver->m_code, driver->m_driver_connection->Name() );
}
conn = driver->m_driver_connection;
for( CONNECTION_SUBGRAPH* subgraph : visited )
{
wxString old_name = subgraph->m_driver_connection->Name();
subgraph->m_driver_connection->Clone( *conn );
subgraph->UpdateItemConnections();
if( old_name != conn->Name() )
recacheSubgraphName( subgraph, old_name );
if( conn->IsBus() )
propagate_bus_neighbors( subgraph );
}
// Somewhere along the way, a bus member may have been upgraded to a global or power label.
// Because this can happen anywhere, we need a second pass to update all instances of that bus
// member to have the correct connection info
if( conn->IsBus() && !stale_bus_members.empty() )
{
for( auto stale_member : stale_bus_members )
{
for( CONNECTION_SUBGRAPH* subgraph : visited )
{
SCH_CONNECTION* member = matchBusMember( subgraph->m_driver_connection,
stale_member );
wxASSERT( member );
wxLogTrace( "CONN", "Updating %lu (%s) member %s to %s", subgraph->m_code,
subgraph->m_driver_connection->Name(), member->LocalName(),
stale_member->Name() );
member->Clone( *stale_member );
propagate_bus_neighbors( subgraph );
}
}
}
aSubgraph->m_dirty = false;
}
std::shared_ptr<SCH_CONNECTION> CONNECTION_GRAPH::getDefaultConnection( SCH_ITEM* aItem,
CONNECTION_SUBGRAPH* aSubgraph )
{
auto c = std::shared_ptr<SCH_CONNECTION>( nullptr );
switch( aItem->Type() )
{
case SCH_PIN_T:
{
auto pin = static_cast<SCH_PIN*>( aItem );
if( pin->IsPowerConnection() )
c = std::make_shared<SCH_CONNECTION>( aItem, aSubgraph->m_sheet );
break;
}
case SCH_GLOBAL_LABEL_T:
case SCH_HIER_LABEL_T:
case SCH_LABEL_T:
{
c = std::make_shared<SCH_CONNECTION>( aItem, aSubgraph->m_sheet );
break;
}
default:
break;
}
if( c )
{
c->SetGraph( this );
c->ConfigureFromLabel( aSubgraph->GetNameForDriver( aItem ) );
}
return c;
}
SCH_CONNECTION* CONNECTION_GRAPH::matchBusMember( SCH_CONNECTION* aBusConnection,
SCH_CONNECTION* aSearch )
{
wxASSERT( aBusConnection->IsBus() );
SCH_CONNECTION* match = nullptr;
if( aBusConnection->Type() == CONNECTION_TYPE::BUS )
{
// Vector bus: compare against index, because we allow the name
// to be different
for( const auto& bus_member : aBusConnection->Members() )
{
if( bus_member->VectorIndex() == aSearch->VectorIndex() )
{
match = bus_member.get();
break;
}
}
}
else
{
// Group bus
for( const auto& c : aBusConnection->Members() )
{
// Vector inside group: compare names, because for bus groups
// we expect the naming to be consistent across all usages
// TODO(JE) explain this in the docs
if( c->Type() == CONNECTION_TYPE::BUS )
{
for( const auto& bus_member : c->Members() )
{
if( bus_member->LocalName() == aSearch->LocalName() )
{
match = bus_member.get();
break;
}
}
}
else if( c->LocalName() == aSearch->LocalName() )
{
match = c.get();
break;
}
}
}
return match;
}
void CONNECTION_GRAPH::recacheSubgraphName( CONNECTION_SUBGRAPH* aSubgraph,
const wxString& aOldName )
{
if( m_net_name_to_subgraphs_map.count( aOldName ) )
{
auto& vec = m_net_name_to_subgraphs_map.at( aOldName );
vec.erase( std::remove( vec.begin(), vec.end(), aSubgraph ), vec.end() );
}
wxLogTrace( "CONN", "recacheSubgraphName: %s => %s", aOldName,
aSubgraph->m_driver_connection->Name() );
m_net_name_to_subgraphs_map[aSubgraph->m_driver_connection->Name()].push_back( aSubgraph );
}
std::shared_ptr<BUS_ALIAS> CONNECTION_GRAPH::GetBusAlias( const wxString& aName )
{
if( m_bus_alias_cache.count( aName ) )
return m_bus_alias_cache.at( aName );
return nullptr;
}
std::vector<const CONNECTION_SUBGRAPH*> CONNECTION_GRAPH::GetBusesNeedingMigration()
{
std::vector<const CONNECTION_SUBGRAPH*> ret;
for( auto&& subgraph : m_subgraphs )
{
// Graph is supposed to be up-to-date before calling this
wxASSERT( !subgraph->m_dirty );
if( !subgraph->m_driver )
continue;
auto sheet = subgraph->m_sheet;
auto connection = subgraph->m_driver->Connection( sheet );
if( !connection->IsBus() )
continue;
auto labels = subgraph->GetBusLabels();
if( labels.size() > 1 )
{
bool different = false;
wxString first = static_cast<SCH_TEXT*>( labels.at( 0 ) )->GetShownText();
for( unsigned i = 1; i < labels.size(); ++i )
{
if( static_cast<SCH_TEXT*>( labels.at( i ) )->GetShownText() != first )
{
different = true;
break;
}
}
if( !different )
continue;
wxLogTrace( "CONN", "SG %ld (%s) has multiple bus labels", subgraph->m_code,
connection->Name() );
ret.push_back( subgraph );
}
}
return ret;
}
CONNECTION_SUBGRAPH* CONNECTION_GRAPH::FindSubgraphByName(
const wxString& aNetName, const SCH_SHEET_PATH& aPath )
{
if( !m_net_name_to_subgraphs_map.count( aNetName ) )
return nullptr;
for( auto sg : m_net_name_to_subgraphs_map.at( aNetName ) )
{
// Cache is supposed to be valid by now
wxASSERT( sg && !sg->m_absorbed && sg->m_driver_connection );
if( sg->m_sheet == aPath && sg->m_driver_connection->Name() == aNetName )
return sg;
}
return nullptr;
}
CONNECTION_SUBGRAPH* CONNECTION_GRAPH::FindFirstSubgraphByName( const wxString& aNetName )
{
if( !m_net_name_to_subgraphs_map.count( aNetName ) )
return nullptr;
wxASSERT( !m_net_name_to_subgraphs_map.at( aNetName ).empty() );
return m_net_name_to_subgraphs_map.at( aNetName )[0];
}
CONNECTION_SUBGRAPH* CONNECTION_GRAPH::GetSubgraphForItem( SCH_ITEM* aItem )
{
if( !m_item_to_subgraph_map.count( aItem ) )
return nullptr;
CONNECTION_SUBGRAPH* ret = m_item_to_subgraph_map.at( aItem );
while( ret->m_absorbed )
ret = ret->m_absorbed_by;
return ret;
}
int CONNECTION_GRAPH::RunERC()
{
int error_count = 0;
wxCHECK_MSG( m_schematic, true, "Null m_schematic in CONNECTION_GRAPH::ercCheckLabels" );
ERC_SETTINGS& settings = m_schematic->ErcSettings();
for( auto&& subgraph : m_subgraphs )
{
// Graph is supposed to be up-to-date before calling RunERC()
wxASSERT( !subgraph->m_dirty );
/**
* NOTE:
*
* We could check that labels attached to bus subgraphs follow the
* proper format (i.e. actually define a bus).
*
* This check doesn't need to be here right now because labels
* won't actually be connected to bus wires if they aren't in the right
* format due to their TestDanglingEnds() implementation.
*/
if( settings.IsTestEnabled( ERCE_DRIVER_CONFLICT ) && !subgraph->ResolveDrivers() )
error_count++;
if( settings.IsTestEnabled( ERCE_BUS_TO_NET_CONFLICT )
&& !ercCheckBusToNetConflicts( subgraph ) )
error_count++;
if( settings.IsTestEnabled( ERCE_BUS_ENTRY_CONFLICT )
&& !ercCheckBusToBusEntryConflicts( subgraph ) )
error_count++;
if( settings.IsTestEnabled( ERCE_BUS_TO_BUS_CONFLICT )
&& !ercCheckBusToBusConflicts( subgraph ) )
error_count++;
// The following checks are always performed since they don't currently
// have an option exposed to the user
if( !ercCheckNoConnects( subgraph ) )
error_count++;
if( ( settings.IsTestEnabled( ERCE_LABEL_NOT_CONNECTED )
|| settings.IsTestEnabled( ERCE_GLOBLABEL ) ) && !ercCheckLabels( subgraph ) )
error_count++;
}
return error_count;
}
bool CONNECTION_GRAPH::ercCheckBusToNetConflicts( const CONNECTION_SUBGRAPH* aSubgraph )
{
auto sheet = aSubgraph->m_sheet;
auto screen = sheet.LastScreen();
SCH_ITEM* net_item = nullptr;
SCH_ITEM* bus_item = nullptr;
SCH_CONNECTION conn( this );
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_LINE_T:
{
if( item->GetLayer() == LAYER_BUS )
bus_item = ( !bus_item ) ? item : bus_item;
else
net_item = ( !net_item ) ? item : net_item;
break;
}
case SCH_GLOBAL_LABEL_T:
case SCH_SHEET_PIN_T:
case SCH_HIER_LABEL_T:
{
SCH_TEXT* text = static_cast<SCH_TEXT*>( item );
conn.ConfigureFromLabel( EscapeString( text->GetShownText(), CTX_NETNAME ) );
if( conn.IsBus() )
bus_item = ( !bus_item ) ? item : bus_item;
else
net_item = ( !net_item ) ? item : net_item;
break;
}
default:
break;
}
}
if( net_item && bus_item )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_BUS_TO_NET_CONFLICT );
ercItem->SetItems( net_item, bus_item );
SCH_MARKER* marker = new SCH_MARKER( ercItem, net_item->GetPosition() );
screen->Append( marker );
return false;
}
return true;
}
bool CONNECTION_GRAPH::ercCheckBusToBusConflicts( const CONNECTION_SUBGRAPH* aSubgraph )
{
wxString msg;
auto sheet = aSubgraph->m_sheet;
auto screen = sheet.LastScreen();
SCH_ITEM* label = nullptr;
SCH_ITEM* port = nullptr;
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_TEXT_T:
case SCH_GLOBAL_LABEL_T:
{
if( !label && item->Connection( sheet )->IsBus() )
label = item;
break;
}
case SCH_SHEET_PIN_T:
case SCH_HIER_LABEL_T:
{
if( !port && item->Connection( sheet )->IsBus() )
port = item;
break;
}
default:
break;
}
}
if( label && port )
{
bool match = false;
for( const auto& member : label->Connection( sheet )->Members() )
{
for( const auto& test : port->Connection( sheet )->Members() )
{
if( test != member && member->Name() == test->Name() )
{
match = true;
break;
}
}
if( match )
break;
}
if( !match )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_BUS_TO_BUS_CONFLICT );
ercItem->SetItems( label, port );
SCH_MARKER* marker = new SCH_MARKER( ercItem, label->GetPosition() );
screen->Append( marker );
return false;
}
}
return true;
}
bool CONNECTION_GRAPH::ercCheckBusToBusEntryConflicts( const CONNECTION_SUBGRAPH* aSubgraph )
{
bool conflict = false;
auto sheet = aSubgraph->m_sheet;
auto screen = sheet.LastScreen();
SCH_BUS_WIRE_ENTRY* bus_entry = nullptr;
SCH_ITEM* bus_wire = nullptr;
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_BUS_WIRE_ENTRY_T:
{
if( !bus_entry )
bus_entry = static_cast<SCH_BUS_WIRE_ENTRY*>( item );
break;
}
default:
break;
}
}
if( bus_entry && bus_entry->m_connected_bus_item )
{
bus_wire = bus_entry->m_connected_bus_item;
wxASSERT( bus_wire->Type() == SCH_LINE_T );
// In some cases, the connection list (SCH_CONNECTION*) can be null.
// Skip null connections.
if( bus_entry->Connection( sheet ) && bus_wire->Type() == SCH_LINE_T
&& bus_wire->Connection( sheet ) )
{
conflict = true;
auto test_name = bus_entry->Connection( sheet )->Name( true );
for( const auto& member : bus_wire->Connection( sheet )->Members() )
{
if( member->Type() == CONNECTION_TYPE::BUS )
{
for( const auto& sub_member : member->Members() )
{
if( sub_member->Name( true ) == test_name )
conflict = false;
}
}
else if( member->Name( true ) == test_name )
{
conflict = false;
}
}
}
}
// Don't report warnings if this bus member has been overridden by a higher priority power pin
// or global label
if( conflict && CONNECTION_SUBGRAPH::GetDriverPriority( aSubgraph->m_driver )
>= CONNECTION_SUBGRAPH::PRIORITY::POWER_PIN )
conflict = false;
if( conflict )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_CONFLICT );
ercItem->SetItems( bus_entry, bus_wire );
SCH_MARKER* marker = new SCH_MARKER( ercItem, bus_entry->GetPosition() );
screen->Append( marker );
return false;
}
return true;
}
// TODO(JE) Check sheet pins here too?
bool CONNECTION_GRAPH::ercCheckNoConnects( const CONNECTION_SUBGRAPH* aSubgraph )
{
wxString msg;
auto sheet = aSubgraph->m_sheet;
auto screen = sheet.LastScreen();
if( aSubgraph->m_no_connect != nullptr )
{
bool has_invalid_items = false;
bool has_other_items = false;
SCH_PIN* pin = nullptr;
std::vector<SCH_ITEM*> invalid_items;
// Any subgraph that contains both a pin and a no-connect should not
// contain any other driving items.
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_PIN_T:
pin = static_cast<SCH_PIN*>( item );
has_other_items = true;
break;
case SCH_LINE_T:
case SCH_JUNCTION_T:
case SCH_NO_CONNECT_T:
break;
default:
has_invalid_items = true;
has_other_items = true;
invalid_items.push_back( item );
}
}
if( pin && has_invalid_items )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_NOCONNECT_CONNECTED );
ercItem->SetItems( pin );
SCH_MARKER* marker = new SCH_MARKER( ercItem, pin->GetTransformedPosition() );
screen->Append( marker );
return false;
}
if( !has_other_items )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_NOCONNECT_NOT_CONNECTED );
ercItem->SetItems( aSubgraph->m_no_connect );
SCH_MARKER* marker = new SCH_MARKER( ercItem, aSubgraph->m_no_connect->GetPosition() );
screen->Append( marker );
return false;
}
}
else
{
bool has_other_connections = false;
SCH_PIN* pin = nullptr;
// Any subgraph that lacks a no-connect and contains a pin should also
// contain at least one other connectable item.
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_PIN_T:
if( !pin )
pin = static_cast<SCH_PIN*>( item );
else
has_other_connections = true;
break;
default:
if( item->IsConnectable() )
has_other_connections = true;
break;
}
}
// Check if invisible power pins connect to anything else.
// Note this won't catch a component with multiple invisible power pins but these don't
// connect to any other net; maybe that should be added as a further optional ERC check?
if( pin && !has_other_connections && pin->IsPowerConnection() && !pin->IsVisible() )
{
wxString name = pin->Connection( sheet )->Name();
wxString local_name = pin->Connection( sheet )->Name( true );
if( m_global_label_cache.count( name ) ||
( m_local_label_cache.count( std::make_pair( sheet, local_name ) ) ) )
{
has_other_connections = true;
}
}
if( pin && !has_other_connections && pin->GetType() != ELECTRICAL_PINTYPE::PT_NC )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( ERCE_PIN_NOT_CONNECTED );
ercItem->SetItems( pin );
SCH_MARKER* marker = new SCH_MARKER( ercItem, pin->GetTransformedPosition() );
screen->Append( marker );
return false;
}
}
return true;
}
bool CONNECTION_GRAPH::ercCheckLabels( const CONNECTION_SUBGRAPH* aSubgraph )
{
// Label connection rules:
// Local labels are flagged if they don't connect to any pins and don't have a no-connect
// Global labels are flagged if they appear only once, don't connect to any local labels,
// and don't have a no-connect marker
// So, if there is a no-connect, we will never generate a warning here
if( aSubgraph->m_no_connect )
return true;
SCH_TEXT* text = nullptr;
bool has_other_connections = false;
for( auto item : aSubgraph->m_items )
{
switch( item->Type() )
{
case SCH_LABEL_T:
case SCH_GLOBAL_LABEL_T:
case SCH_HIER_LABEL_T:
text = static_cast<SCH_TEXT*>( item );
break;
case SCH_PIN_T:
case SCH_SHEET_PIN_T:
has_other_connections = true;
break;
default:
break;
}
}
if( !text )
return true;
bool is_global = text->Type() == SCH_GLOBAL_LABEL_T;
wxCHECK_MSG( m_schematic, true, "Null m_schematic in CONNECTION_GRAPH::ercCheckLabels" );
// Global label check can be disabled independently
if( !m_schematic->ErcSettings().IsTestEnabled( ERCE_GLOBLABEL ) && is_global )
return true;
wxString name = EscapeString( text->GetShownText(), CTX_NETNAME );
if( is_global )
{
// This will be set to true if the global is connected to a pin above, but we
// want to reset this to false so that globals get flagged if they only have a
// single instance
has_other_connections = false;
if( m_net_name_to_subgraphs_map.count( name )
&& m_net_name_to_subgraphs_map.at( name ).size() > 1 )
has_other_connections = true;
}
else if( text->Type() == SCH_HIER_LABEL_T )
{
// For a hier label, check if the parent pin is connected
if( aSubgraph->m_hier_parent &&
( aSubgraph->m_hier_parent->m_strong_driver ||
aSubgraph->m_hier_parent->m_drivers.size() > 1))
{
// For now, a simple check: if there is more than one driver, the parent is probably
// connected elsewhere (because at least one driver will be the hier pin itself)
has_other_connections = true;
}
}
else
{
auto pair = std::make_pair( aSubgraph->m_sheet, name );
if( m_local_label_cache.count( pair ) && m_local_label_cache.at( pair ).size() > 1 )
has_other_connections = true;
}
if( !has_other_connections )
{
ERC_ITEM* ercItem = ERC_ITEM::Create( is_global ? ERCE_GLOBLABEL : ERCE_LABEL_NOT_CONNECTED );
ercItem->SetItems( text );
SCH_MARKER* marker = new SCH_MARKER( ercItem, text->GetPosition() );
aSubgraph->m_sheet.LastScreen()->Append( marker );
return false;
}
return true;
}
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