X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/blast.git/blobdiff_plain/4cf57e6db08da791233d75237f62e74bc88dd427..HEAD:/Dispatcher.cpp?ds=inline

diff --git a/Dispatcher.cpp b/Dispatcher.cpp
index a552f20..574243e 100644
--- a/Dispatcher.cpp
+++ b/Dispatcher.cpp
@@ -2,6 +2,8 @@
 #include "Parameters.h"
 #include "MainWindow.h"
 
+#include "ExternalResource.h"
+
 #include "Graph.h"
 #include "ReferenceBlock.h"
 #include "GroupBlock.h"
@@ -16,7 +18,7 @@
 #include "GroupScene.h"
 #include "GroupItem.h"
 #include "BoxItem.h"
-#include "SourceItem.h"
+#include "StimuliItem.h"
 #include "InterfaceItem.h"
 #include "ConnectionItem.h"
 
@@ -27,7 +29,9 @@
 #include "DelayInputModifier.h"
 
 
-#include "InterfacePropertiesWindow.h"
+#include "InterfacePropertiesDialog.h"
+
+#include <QHashIterator>
 
 int Dispatcher::sceneCounter = 0;
 
@@ -35,8 +39,8 @@ Dispatcher::Dispatcher(Parameters* _params, MainWindow* _window) {
   params = _params;
   mainWindow =_window;
   params->setDispatcher(this);
-  currentGroup = NULL;
-  topGroup = NULL;    
+  currentGroupWidget = NULL;
+  topGroupWidget = NULL;
 }
 
 GroupWidget *Dispatcher::loadProject(const QString& filename) {
@@ -60,7 +64,7 @@ GroupWidget *Dispatcher::loadProject(const QString& filename) {
   params->setCurrentScene(scene);
 */
   try {   
-    topGroup = params->loadProject(root);
+    topGroupWidget = params->loadProject(root);
   }
   catch(Exception e){
     cerr << qPrintable(e.getDefaultMessage()) << endl;
@@ -69,8 +73,12 @@ GroupWidget *Dispatcher::loadProject(const QString& filename) {
     return NULL;
   }
 
-  groupList.append(topGroup);
-  return topGroup;
+  QFileInfo info(filename);
+  params->projectPath = info.absolutePath();
+  params->projectName = info.baseName();
+  cout << "project path = " << qPrintable(params->projectPath) << endl;
+  groupList.append(topGroupWidget);
+  return topGroupWidget;
 }
 
 void Dispatcher::closeCurrentProject() {
@@ -80,13 +88,28 @@ void Dispatcher::closeCurrentProject() {
   }
   groupList.clear();
   params->destroyGraph();
-  topGroup = NULL;
-  currentGroup = NULL;
+  topGroupWidget = NULL;
+  currentGroupWidget = NULL;
   sceneCounter = 0;
 }
 
-bool Dispatcher::createConnection(InterfaceItem *iface1, InterfaceItem *iface2) {
-    
+void Dispatcher::setSceneCounter(Context context, int value) {
+
+  if (context != Load) return;
+  sceneCounter = value;
+}
+
+bool Dispatcher::createConnection(Context context, InterfaceItem *iface1, InterfaceItem *iface2, bool visible) {
+  static QString fctName = "Dispatcher::createConnection()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+
+  bool testClock = false;
+  if (context == Design) {
+    testClock = true;
+  }
+
   ConnectedInterface* ref1 = iface1->refInter;
   ConnectedInterface* ref2 = iface2->refInter;  
   // connect both interface
@@ -94,30 +117,43 @@ bool Dispatcher::createConnection(InterfaceItem *iface1, InterfaceItem *iface2)
   bool ok1 = false;
   bool ok2 = false;
 
+  cout << "trying to create a connection between " << qPrintable(ref1->getOwner()->getName()) << "/" << qPrintable(ref1->getName());
+  cout << " and " << qPrintable(ref2->getOwner()->getName()) << "/" << qPrintable(ref2->getName());
+
   // test the ref1->ref2 connection
-  if ((ref1->canConnectTo(ref2)) && (ref2->canConnectFrom(ref1))) {
+  if ((ref1->canConnectTo(ref2,testClock)) && (ref2->canConnectFrom(ref1,testClock))) {
     ref1->connectTo(ref2);    
     ok1 = true;
   }
-  // if the frist one did not work, test ref2->ref1
-  if ((ok1 == false) && (ref2->canConnectTo(ref1)) && (ref1->canConnectFrom(ref2))) {  
+  // if the first one did not work, test ref2->ref1
+  if ((ok1 == false) && (ref2->canConnectTo(ref1,testClock)) && (ref1->canConnectFrom(ref2,testClock))) {
     ref2->connectTo(ref1);    
     ok2 = true;
   }
-  if ((ok1 == true) || (ok2 == true)) {
+  if ((ok1 == true) || (ok2 == true)) {    
+
+    if (ok1) {
+      cout << " ... done with " << qPrintable(ref1->getOwner()->getName()) << "/" << qPrintable(ref1->getName());
+      cout << " to " << qPrintable(ref2->getOwner()->getName()) << "/" << qPrintable(ref2->getName());
+      iface1->getOwner()->getScene()->createConnectionItem(iface1,iface2, visible);
+    }
+    else {
+      cout << "... done with " << qPrintable(ref2->getOwner()->getName()) << "/" << qPrintable(ref2->getName());
+      cout << " to " << qPrintable(ref1->getOwner()->getName()) << "/" << qPrintable(ref1->getName());
+      iface2->getOwner()->getScene()->createConnectionItem(iface2,iface1, visible);
+    }
 
-    iface1->getOwner()->getScene()->createConnectionItem(iface1,iface2);
+    cout << endl;
 
-    unselectAllItems();
-    params->unsaveModif = true;
-    cout << "created a connection from " << qPrintable(ref1->getName()) << " to " << qPrintable(ref2->getName()) << endl;
+    unselectAllItems(context);
+    params->unsaveModif = true;    
     return true;
   }
   return false;
 }
 
 
-void Dispatcher::unselectAllItems(int direction){
+void Dispatcher::unselectAllItems(Context context, int direction){
 
   GroupScene *scene = params->getCurrentScene();
 
@@ -129,14 +165,14 @@ void Dispatcher::unselectAllItems(int direction){
   scene->update();
 }
 
-void Dispatcher::setCurrentGroupWidget(GroupWidget *win){
+void Dispatcher::setCurrentGroupWidget(Context context, GroupWidget *win){
   win->setFocus();
   win->changeConnectionMode(-1);
-  currentGroup = win;
+  currentGroupWidget = win;
   params->setCurrentScene(win->getScene());
 }
 
-void Dispatcher::changeConnectionMode(int mode){
+void Dispatcher::changeConnectionMode(Context context, int mode){
 
   /*
   foreach(GroupWidget* win, groupList){
@@ -171,18 +207,132 @@ void Dispatcher::changeConnectionMode(int mode){
   */
 }
 
-void Dispatcher::generateBlockVHDL(BoxItem *item){
+void Dispatcher::generateVHDL(Context context) throw(Exception) {
+  static QString fctName = "Dispatcher::generateVHDL()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+
+  QDir baseDir(params->projectPath);
+  QDir srcDir(params->projectPath+"/src");
+
+  if (!baseDir.exists()) {
+    cerr << "Project path " << qPrintable(params->projectPath) << " no longer exists. First, recreate it and put the project file within. Then retry to generate." << endl;
+    return;
+  }
+
+  if (srcDir.exists()) {
+    srcDir.removeRecursively();
+  }
+  baseDir.mkdir("src");
+
+  if (! baseDir.exists("testbench")) {
+    baseDir.mkdir("testbench");
+  }
+  if (! baseDir.exists("Makefile")) {
+    QFile make("/home/sdomas/Projet/Blast/code/blast/Makefile-isim");
+    QString dest = params->projectPath;
+    dest += "/Makefile";
+    make.copy(dest);
+  }
+
+  // generate VHDL + copying external resources
+  QString dest = params->projectPath;
+  dest += "/src/";  
+  try {    
+    params->getGraph()->generateVHDL(dest);
+
+    QList<QString> extResources = params->getGraph()->getExternalResources();
+    foreach(QString name, extResources) {
+      cout << qPrintable(name) << endl;
+      QList<ExternalResource*> lstRes = params->searchResourceByName(name);
+      foreach(ExternalResource* res, lstRes) {
+        QFile resFile(res->getFile());
+        QFileInfo info(res->getFile());
+        QString destFile = dest+info.fileName();
+        cout << "copying " << qPrintable(res->getFile()) << " into " << qPrintable(destFile) << endl;
+        resFile.copy(destFile);
+      }
+    }
+  }
+  catch(Exception e) {
+    throw(e);
+  }
+  // generate testbench
+  dest = params->projectPath;
+  dest += "/testbench/";
+  dest += params->projectName;
+  dest += "_tb.vhd";
+  try {
+    params->getGraph()->generateTestbench(params->projectName, dest);
+  }
+  catch(Exception e) {
+    throw(e);
+  }
+
+  // creating parameters file
+  QString paramName = params->projectPath+"/params-isim.txt";
+  QFile paramFile(paramName);
+  if (!paramFile.open(QIODevice::WriteOnly)) {
+    throw(Exception(PROJECTPATH_NOACCESS));
+  }
+  QTextStream out(&paramFile);
+  out << "PROJECT_NAME := " << params->projectName << endl << endl;
+  out << "SRC_DIR := src" << endl;
+  out << "TB_DIR := testbench" << endl << endl;
+  out << "VHDL_SRC := ";
+  QStringList filter;
+  filter << "*.vhd" ;
+  srcDir.setNameFilters(filter);
+  QStringList listVHDL = srcDir.entryList();
+  for(int j=0;j<listVHDL.size();j++) {
+    if (j > 0) {
+      out << "\t";
+    }
+    out << "$(SRC_DIR)/" << qPrintable(listVHDL.at(j));
+    if (j != listVHDL.size()-1) {
+      out << " \\";
+    }
+    out << endl;
+  }
+  out << endl;
+  out << "VL_SRC := ${XILINX}/verilog/src/glbl.v" << endl << endl;
+  out << "TB_SRC := $(TB_DIR)/$(PROJECT_NAME)_tb.vhd" << endl << endl;
+  out << "SIMU_EXE := $(PROJECT_NAME)_tb" << endl << endl;
+
+  paramFile.close();
+
+  QString msg = "VHDL generation completed successfully. Go to ";
+  msg += params->projectPath+" and type the following commands to launch a simulation:\n";
+  msg += "\tmake clean\n";
+  msg += "\tmake\n";
+  msg += "\tmake view\n";
+  QMessageBox::information(mainWindow,"VHDL generation", msg, QMessageBox::Ok);
+
+}
+
+void Dispatcher::generateBlockVHDL(Context context, BoxItem *item){
   static QString fctName = "Dispatcher::generateBlockVHDL()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
 
   if (item->getRefBlock()->isFunctionalBlock()) {
     FunctionalBlock* block = AB_TO_FUN(item->getRefBlock());
-    ReferenceBlock* ref = block->getReference();
-    BlockImplementation* impl = ref->getImplementations().at(0);
     try {
-      impl->generateVHDL(block,"/home/sdomas/");
+      block->generateVHDL(params->projectPath);      
     }
     catch(Exception e) {
       cout << qPrintable(e.getMessage()) << endl;
@@ -190,11 +340,17 @@ void Dispatcher::generateBlockVHDL(BoxItem *item){
   }
 }
 
-void Dispatcher::renameFunctionalBlock(BoxItem *item){
+void Dispatcher::renameFunctionalBlock(Context context, BoxItem *item){
   static QString fctName = "Dispatcher::renameFunctionalBlock()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
     
   GroupWidget* win = item->getScene()->getGroupWidget();
   
@@ -229,11 +385,17 @@ void Dispatcher::renameFunctionalBlock(BoxItem *item){
   item->nameChanged();
 }
 
-void Dispatcher::renameGroupBlock(GroupItem *item){
+void Dispatcher::renameGroupBlock(Context context, GroupItem *item){
   static QString fctName = "Dispatcher::renameGroupBlock()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
   
   GroupWidget* win = item->getScene()->getGroupWidget();
   
@@ -275,18 +437,24 @@ void Dispatcher::renameGroupBlock(GroupItem *item){
   mainWindow->getLibrary()->updateComboScene();   
 }
 
-void Dispatcher::renameSourceBlock(SourceItem *item){
-  static QString fctName = "Dispatcher::renameSourceBlock()";
+void Dispatcher::renameStimuliItem(Context context, StimuliItem *item){
+  static QString fctName = "Dispatcher::renameStimuliItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
     
   GroupWidget* win = item->getScene()->getGroupWidget();
   
   bool ok = false;
   QString text = "";  
   while (!ok) {  
-    text = QInputDialog::getText(win, "Rename a source",
+    text = QInputDialog::getText(win, "Rename a stimuli",
                                        "New name:", QLineEdit::Normal,
                                        item->getRefBlock()->getName(), &ok);
     if (!ok) return;
@@ -300,10 +468,10 @@ void Dispatcher::renameSourceBlock(SourceItem *item){
       ok = false;
     }
     else {
-      FunctionalBlock* block = params->getGraph()->getSourceBlockByName(text);
+      FunctionalBlock* block = params->getGraph()->getStimuliBlockByName(text);
       if (block != NULL) {
         QMessageBox::warning(win,"Error in given name",
-                             "the name provided is similar to that of another source block within the top group",
+                             "the name provided is similar to that of another stimuli block within the top group",
                              QMessageBox::Ok);
         ok = false;
       }
@@ -315,11 +483,16 @@ void Dispatcher::renameSourceBlock(SourceItem *item){
 }
 
 
-void Dispatcher::renameInterface(InterfaceItem *item) {
+void Dispatcher::renameInterface(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::renameInterface()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   GroupWidget* win = item->getOwner()->getScene()->getGroupWidget();
   
@@ -359,11 +532,17 @@ void Dispatcher::renameInterface(InterfaceItem *item) {
   item->getOwner()->nameChanged();  
 }
 
-void Dispatcher::showPatterns(InterfaceItem *item) {
+void Dispatcher::showPatterns(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::showPatterns()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
   QString msg = "";
   if (item->refInter->getDirection() == AbstractInterface::Input) {
     msg = "Input pattern of iface ";
@@ -371,10 +550,18 @@ void Dispatcher::showPatterns(InterfaceItem *item) {
     msg += " owned by ";
     msg += item->refInter->getOwner()->getName();
     msg += " is:\n";
-    ConnectedInterface* iface = AI_TO_CON(item->refInter->getAssociatedIface());
-    ConnectedInterface* fromIface = iface->getConnectedFrom();
-    if (fromIface->getOutputPattern() == NULL) return;
-    foreach(char c, *(fromIface->getOutputPattern())) {
+    // get the precursor output pattern
+    ConnectedInterface* connIface = AI_TO_CON(item->refInter->getAssociatedIface());
+    QList<char>* out = connIface->getConnectedFrom()->getOutputPattern();
+    // get the modifier
+    AbstractInputModifier* modifier = connIface->getInputModifier();
+    // check if the input is modified
+    if (modifier != NULL) {
+
+      out = modifier->getModifiedInput(out);
+    }
+
+    foreach(char c, *out) {
       msg += QString::number((int)c);
     }
     msg += "\n";
@@ -395,13 +582,20 @@ void Dispatcher::showPatterns(InterfaceItem *item) {
   QMessageBox::information(NULL,"Interface pattern",msg,QMessageBox::Ok,QMessageBox::Ok);
 }
 
-void Dispatcher::showModifier(InterfaceItem *item) {
+void Dispatcher::showModifier(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::showModifier()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
   QString msg = "";
-  AbstractInputModifier* mod = item->refInter->getInputModifier();
+  ConnectedInterface* assoIface = AI_TO_CON(item->refInter->getAssociatedIface());
+  AbstractInputModifier* mod = assoIface->getInputModifier();
   if (mod->isDelay()) {
     DelayInputModifier* delay = (DelayInputModifier *)mod;
     msg = "Pattern of iface ";
@@ -415,21 +609,34 @@ void Dispatcher::showModifier(InterfaceItem *item) {
   QMessageBox::information(NULL,"Interface pattern",msg,QMessageBox::Ok,QMessageBox::Ok);
 }
 
-void Dispatcher::removeModifier(InterfaceItem *item) {
-  static QString fctName = "Dispatcher::showModifier()";
+void Dispatcher::removeModifier(Context context, InterfaceItem *item) {
+  static QString fctName = "Dispatcher::removeModifier()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
-  item->refInter->clearInputModifier();
+
+  ConnectedInterface* assoIface = AI_TO_CON(item->refInter->getAssociatedIface());
+  assoIface->clearInputModifier();
 }
 
 
-void Dispatcher::duplicateBoxItem(BoxItem *item){
+void Dispatcher::duplicateBoxItem(Context context, BoxItem *item){
   static QString fctName = "Dispatcher::duplicateBoxItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
 
   GroupScene *scene = item->getScene();
   AbstractBlock* block = item->getRefBlock();  
@@ -448,11 +655,17 @@ void Dispatcher::duplicateBoxItem(BoxItem *item){
   }
 }
 
-void Dispatcher::duplicateSourceItem(SourceItem *item) {
-  static QString fctName = "Dispatcher::duplicateSourceItem()";
+void Dispatcher::duplicateStimuliItem(Context context, StimuliItem *item) {
+  static QString fctName = "Dispatcher::duplicateStimuliItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
 
   GroupScene *scene = item->getScene();
   AbstractBlock* block = item->getRefBlock();  
@@ -463,19 +676,25 @@ void Dispatcher::duplicateSourceItem(SourceItem *item) {
 
     // adding to the model
     FunctionalBlock* funBlock = (FunctionalBlock*)block;
-    newBlock = params->getGraph()->duplicateSourceBlock(funBlock);
+    newBlock = params->getGraph()->duplicateStimuliBlock(funBlock);
     // adding to the view
-    scene->createSourceItem(newBlock);
+    scene->createStimuliItem(newBlock);
 
     params->unsaveModif = true;
   }
 }
 
-void Dispatcher::duplicateInterfaceItem(InterfaceItem *item) {
+void Dispatcher::duplicateInterfaceItem(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::duplicateInterfaceItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
 
   AbstractInterface *refI = item->refInter;
   if (! refI->isFunctionalInterface()) return;
@@ -507,95 +726,201 @@ void Dispatcher::duplicateInterfaceItem(InterfaceItem *item) {
 }
 
 
-BoxItem* Dispatcher::addBlock(int idCategory, int idBlock, int idScene) {
+void Dispatcher::addBlock(Context context, int idCategory, int idBlock, int idScene, QHash<QString, int> clkRstToGen) {
   static QString fctName = "Dispatcher::addBlock()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
-  bool newSource = false;
-  BoxItem* item = NULL;
-  GroupScene *scene = getSceneById(idScene);
-  ReferenceBlock* ref = params->getReferenceBlock(idCategory,idBlock);
-  // if block has no inputs, propose to add it as a source to top scene
-  if ((scene->isTopScene()) && (ref->isGeneratorBlock())) {
-    int ret = QMessageBox::question(NULL,"Adding a block to top scene","Selected block may be used as a source for the top scene. Do you want to add it as a source ?");
-    if (ret == QMessageBox::Yes) {
-      newSource = true;      
-    }   
-  }
-  if (newSource) {
-    FunctionalBlock* newOne = params->getGraph()->createSourceBlock(ref);
-    scene->createSourceItem(newOne);
+  bool newStimuli = false;  
+
+  /* For now, this method is only used while designing and not loading */
+  if (context == Design) {
+    GroupScene *scene = getSceneById(idScene);
+    ReferenceBlock* ref = params->getReferenceBlock(idCategory,idBlock);
+    // if block has no inputs, propose to add it as a source to top scene
+    if ((scene->isTopScene()) && (ref->isSourceBlock())) {
+      int ret = QMessageBox::question(NULL,"Adding a block to top scene","Selected block may be used as a stimuli for the top scene. Do you want to add it as a stimuli ?");
+      if (ret == QMessageBox::Yes) {
+        newStimuli = true;
+      }
+    }
+    if (newStimuli) {
+      FunctionalBlock* newOne = params->getGraph()->createStimuliBlock(ref, true);
+      StimuliItem* item = scene->createStimuliItem(newOne);
+      QHashIterator<QString,int> iter(clkRstToGen);
+      while (iter.hasNext()) {
+        iter.next();
+        AbstractInterface* iface = newOne->getIfaceFromName(iter.key());
+        if (iface->getPurpose() == AbstractInterface::Clock) {
+          connectStimuliItemClock(context,item,iface->getName(),iter.value());
+        }
+        else if (iface->getPurpose() == AbstractInterface::Reset) {
+          connectStimuliItemReset(context,item,iface->getName(),iter.value());
+        }
+      }
+    }
+    else {
+
+      GroupBlock* group = AB_TO_GRP(scene->getGroupItem()->getRefBlock());
+      FunctionalBlock* newOne = params->getGraph()->createFunctionalBlock(group, ref, true);
+
+      // creating the box item
+      BoxItem* item = scene->createBoxItem(newOne);
+
+      QHashIterator<QString,int> iter(clkRstToGen);
+      while (iter.hasNext()) {
+        iter.next();
+        AbstractInterface* iface = newOne->getIfaceFromName(iter.key());
+        if (iface->getPurpose() == AbstractInterface::Clock) {
+          connectBoxItemClock(context,item,iface->getName(),iter.value());
+        }
+        else if (iface->getPurpose() == AbstractInterface::Reset) {
+          connectBoxItemReset(context,item,iface->getName(),iter.value());
+        }
+      }
+
+      params->blockToItem.insert(newOne,item);
+    }
+    params->unsaveModif = true;
   }
-  else {
-    GroupBlock* group = AB_TO_GRP(scene->getGroupItem()->getRefBlock());
-    FunctionalBlock* newOne = params->getGraph()->createFunctionalBlock(group, ref);
-    item = scene->createBoxItem(newOne);
+}
+
+void Dispatcher::addClkRstGenBlock(Context context, double frequency) {
+  static QString fctName = "Dispatcher::addClkRstGenBlock()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+
+
+  if (context == Design) {
+
+    params->getGraph()->addClock(frequency);
+
+    // get the top group
+    GroupBlock *group = params->getGraph()->getTopGroup();
+    GroupScene *scene = topGroupWidget->getScene();
+
+    // creating the clkrstgen block
+    ReferenceBlock* ref = params->getHiddenReferenceBlock("clkrstgen");
+    FunctionalBlock* newOne = params->getGraph()->createFunctionalBlock(group, ref, true);
+
+    QString name = "clkrstgen_";
+    name += QString::number(params->getGraph()->getClocks().size()-1);
+    newOne->setName(name);
+
+    // creating the box item
+    BoxItem* item = scene->createBoxItem(newOne, BoxItem::Left, AbstractBoxItem::Dimension);
+    item->setVisible(false);
+
+    ConnectedInterface* fromIfaceClk = NULL;
+    ConnectedInterface* fromIfaceReset = NULL;
+    QString clkName = "ext_clk_"+QString::number(params->getGraph()->getClocks().size()-1);
+    QString rstName = "ext_reset_"+QString::number(params->getGraph()->getClocks().size()-1);
+    fromIfaceClk = new GroupInterface(group,clkName, AbstractInterface::Input, AbstractInterface::Clock);
+    fromIfaceReset = new GroupInterface(group,rstName, AbstractInterface::Input, AbstractInterface::Reset);
+    group->addInterface(fromIfaceClk);
+    group->addInterface(fromIfaceReset);
+  // creating top group ext_clk iface item
+    GroupItem* groupItem = scene->getGroupItem();
+    InterfaceItem* fromIfaceItemClk = new InterfaceItem(0.5 , Parameters::West, fromIfaceClk, groupItem, params, true);
+    groupItem->addInterfaceItem(fromIfaceItemClk,true);
+    // creating top group ext_reset iface item
+    InterfaceItem* fromIfaceItemReset = new InterfaceItem(0.5 , Parameters::West, fromIfaceReset, groupItem, params, false);
+    groupItem->addInterfaceItem(fromIfaceItemReset,true);
+    // connecting ext_clk iface items
+    InterfaceItem* toIfaceItemClk = item->searchInterfaceItemByName("ext_clk");
+    if (toIfaceItemClk == NULL) {
+      cerr << "Abnormal case while connecting top group ext_clk to clkrstgen" << endl;
+    }
+    createConnection(context,fromIfaceItemClk, toIfaceItemClk, false);
+    // connecting ext_reset iface items
+    InterfaceItem* toIfaceItemReset = item->searchInterfaceItemByName("ext_reset");
+    if (toIfaceItemReset == NULL) {
+      cerr << "Abnormal case while connecting top group ext_reset to clkrstgen" << endl;
+    }
+    createConnection(context,fromIfaceItemReset, toIfaceItemReset, false);
+
     params->blockToItem.insert(newOne,item);
+    params->unsaveModif = true;
   }
-  params->unsaveModif = true;
-  return item;
 }
 
 
-GroupWidget *Dispatcher::createTopScene(){
+
+GroupWidget *Dispatcher::createTopScene(Context context, double mainClock){
   static QString fctName = "Dispatcher::createTopScene()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
 
-  // creating the model part of the group
-  Graph* graph = params->createGraph();
-  GroupBlock *refBlock = graph->getTopGroup();
-
-  // creating a fake and not connected interface
-  //AbstractInterface* iface = new GroupInterface(refBlock,"grp_iface",AbstractInterface::Input,AbstractInterface::Top);
+  Graph* graph = NULL;
+  // creating the graph and thus, the topgroup
+  if (context == Design) {
+    graph = params->initGraph(true);
+    graph->addClock(mainClock);
+  }
+  else if (context == Load) {
+    graph = params->initGraph(false);
+  }
 
-  // creating the group widget
-  topGroup = new GroupWidget(NULL,this,params);
-  currentGroup = topGroup;
+  // get the top group
+  GroupBlock *topBlock = graph->getTopGroup();
+  // creating the top group widget
+  topGroupWidget = new GroupWidget(NULL,this,params);
+  currentGroupWidget = topGroupWidget;
   // getting the newly created scene
-  GroupScene *scene = topGroup->getScene();
+  GroupScene *scene = topGroupWidget->getScene();
   scene->setId(sceneCounter++);
   params->setTopScene(scene);
   params->setCurrentScene(scene);
   // creating the view part of the group
-  GroupItem *group = new GroupItem(NULL,refBlock,this,params);
-
+  GroupItem *group = new GroupItem(NULL,topBlock,this,params);
+  // associate the top scene to the top group iten
+  scene->setGroupItem(group);
 
   // adding the fake interface to the top group item
   //InterfaceItem* item = new InterfaceItem(0.0 , Parameters::West, (ConnectedInterface*)iface, group, params);
   //group->addInterface(item,true);
 
-  scene->setGroupItem(group);
 
-  groupList.append(topGroup);
-  return topGroup;
+  if (context == Design) {
+    // create clkrstgen
+    double freq = params->getGraph()->getClock(0);
+    params->getGraph()->resetClocks();
+    addClkRstGenBlock(context,freq);
+  }
+
+  groupList.append(topGroupWidget);
+  return topGroupWidget;
 }
 
-GroupWidget* Dispatcher::addNewEmptyGroup(GroupScene* scene, bool show) {
+GroupWidget* Dispatcher::addNewEmptyGroup(Context context, GroupScene* scene, bool show) {
   static QString fctName = "Dispatcher::addNewEmptyGroup();";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  bool createIfaces = true;
+  if (context == Load) {
+    createIfaces = false;
+  }
 
   // getting the parent block in the graph
   GroupBlock* parent = AB_TO_GRP(scene->getGroupItem()->getRefBlock());
   cout << "new group : parent = "<< qPrintable(parent->getName()) << endl;
-  GroupBlock* groupBlock = params->getGraph()->createChildGroupBlock(parent);
+  GroupBlock* groupBlock = params->getGraph()->createChildGroupBlock(parent, createIfaces);
   cout << "new group : child = "<< qPrintable(groupBlock->getName()) << ", child of " << qPrintable(groupBlock->getParent()->getName()) << endl;
   // creating the BlockItem in the scene
   BoxItem* newItem = scene->createBoxItem(groupBlock);
 
   params->unsaveModif = true;
 
-  GroupWidget* child = createChildScene(scene->getGroupWidget(),newItem);
+  GroupWidget* child = createChildScene(context, scene->getGroupWidget(),newItem);
   if (show) child->show();
   return child;
 
 }
 
-GroupWidget *Dispatcher::createChildScene(GroupWidget* parentWidget, BoxItem *upperItemOfGroupItem) {
+GroupWidget *Dispatcher::createChildScene(Context context, GroupWidget* parentWidget, BoxItem *upperItemOfGroupItem) {
   static QString fctName = "Dispatcher::createChildScene()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
@@ -637,9 +962,9 @@ GroupWidget *Dispatcher::createChildScene(GroupWidget* parentWidget, BoxItem *up
   return group;
 }
 
-void Dispatcher::destroyScene(GroupScene *scene) {
+void Dispatcher::destroyScene(Context context, GroupScene *scene) {
   foreach(GroupScene* s, scene->getChildrenScene()) {
-    destroyScene(s);
+    destroyScene(context, s);
   }
 
   if (scene->getNbChildScene() == 0) {
@@ -656,7 +981,7 @@ void Dispatcher::destroyScene(GroupScene *scene) {
   }
 }
 
-void Dispatcher::showRaiseWindow(BoxItem *item) {
+void Dispatcher::showRaiseWindow(Context context, BoxItem *item) {
   static QString fctName = "Dispatcher::showRaiseWindow()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
@@ -675,11 +1000,11 @@ void Dispatcher::showRaiseWindow(BoxItem *item) {
   win->raise();
   win->activateWindow();
 
-  currentGroup = win;
-  params->setCurrentScene(currentGroup->getScene());
+  currentGroupWidget = win;
+  params->setCurrentScene(currentGroupWidget->getScene());
 }
 
-void Dispatcher::showRstClkIface(AbstractBoxItem *item) {
+void Dispatcher::showRstClkIface(Context context, AbstractBoxItem *item) {
   static QString fctName = "Dispatcher::showRstClkIface()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
@@ -689,7 +1014,7 @@ void Dispatcher::showRstClkIface(AbstractBoxItem *item) {
   
 }
 
-void Dispatcher::showWishboneIface(AbstractBoxItem *item) {
+void Dispatcher::showWishboneIface(Context context, AbstractBoxItem *item) {
   static QString fctName = "Dispatcher::showWishboneIface()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
@@ -698,7 +1023,7 @@ void Dispatcher::showWishboneIface(AbstractBoxItem *item) {
   item->setWishboneVisible(!item->isWishboneVisible());  
 }
 
-void Dispatcher::addNewFullGroup() {
+void Dispatcher::addNewFullGroup(Context context) {
   static QString fctName = "Dispatcher::addNewFullGroup()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
@@ -859,11 +1184,16 @@ void Dispatcher::addNewFullGroup() {
 #endif
 }
 
-void Dispatcher::removeBoxItem(BoxItem *item) {
+void Dispatcher::removeBoxItem(Context context, BoxItem *item) {
   static QString fctName = "Dispatcher::removeBoxItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " << qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   /* a BoxItem (group of func) can be removed only if none of its
      interfaces is connected to a group interface that is itself
@@ -910,7 +1240,7 @@ void Dispatcher::removeBoxItem(BoxItem *item) {
   if (ret == QMessageBox::Cancel) {
     return;
   }
-  removeAllBlockConnections(item);
+  removeAllBlockConnections(context, item);
 
   if (item->getRefBlock()->isFunctionalBlock()) {
     FunctionalBlock* block = AB_TO_FUN(item->getRefBlock());    
@@ -925,7 +1255,7 @@ void Dispatcher::removeBoxItem(BoxItem *item) {
 
     // remove all child scenes recursively
     GroupItem* subgroup = item->getChildGroupItem();
-    destroyScene(subgroup->getScene());
+    destroyScene(context, subgroup->getScene());
     // remove the BoxItem
     item->getScene()->removeBoxItem(item);
     // remove the group from the graph
@@ -933,47 +1263,63 @@ void Dispatcher::removeBoxItem(BoxItem *item) {
   }
 }
 
-void Dispatcher::removeAllBlockConnections(AbstractBoxItem *item) {
+void Dispatcher::removeAllBlockConnections(Context context, AbstractBoxItem *item) {
   static QString fctName = "Dispatcher::removeAllBlockConnection()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   foreach(InterfaceItem* ifaceItem, item->getInterfaces()) {
     foreach(ConnectionItem* conn, ifaceItem->connections) {
-      removeConnection(conn);
+      removeConnection(context, conn);
     }
   }
 }
 
-void Dispatcher::removeSourceItem(SourceItem *item) {
-  static QString fctName = "Dispatcher::removeSourceItem()";
+void Dispatcher::removeStimuliItem(Context context, StimuliItem *item) {
+  static QString fctName = "Dispatcher::removeStimuliItem()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
   
-  QString msg = "Removing source ";
+  QString msg = "Removing stimmuli ";
   
   msg += item->getRefBlock()->getName();
   msg += " and all its connections.\n\nAre you sure ?";
 
-  int ret = QMessageBox::question(NULL,"Removing source block",msg, QMessageBox::Ok | QMessageBox::Cancel, QMessageBox::Ok);
+  int ret = QMessageBox::question(NULL,"Removing stimuli block",msg, QMessageBox::Ok | QMessageBox::Cancel, QMessageBox::Ok);
   if (ret == QMessageBox::Cancel) {
     return;
   }
-  removeAllBlockConnections(item);
+  removeAllBlockConnections(context, item);
   
   FunctionalBlock* block = AB_TO_FUN(item->getRefBlock());  
-  item->getScene()->removeSourceItem(item);
-  params->getGraph()->removeSourceBlock(block);  
+  item->getScene()->removeStimuliItem(item);
+  params->getGraph()->removeStimuliBlock(block);
 }
 
 
-void Dispatcher::removeConnection(ConnectionItem *connItem) {
+void Dispatcher::removeConnection(Context context, ConnectionItem *connItem) {
   static QString fctName = "Dispatcher::removeConnection()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
   InterfaceItem* fromIfaceItem = connItem->getFromInterfaceItem();
   InterfaceItem* toIfaceItem = connItem->getToInterfaceItem();
 
@@ -1045,14 +1391,184 @@ void Dispatcher::removeConnection(ConnectionItem *connItem) {
   }
 }
 
+void Dispatcher::connectBoxItemClock(Context context, BoxItem *item, QString clkName, int idGen) throw(Exception) {
+
+  static QString fctName = "Dispatcher::connectBoxItemClock()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+  InterfaceItem* fromIfaceItemClk = NULL;
+  InterfaceItem* toIfaceItemClk = item->searchInterfaceItemByName(clkName);
+  GroupItem* parentGroup = item->getScene()->getGroupItem();
+  BoxItem* clkrstItem = NULL;
+
+  if (parentGroup->getRefBlock()->isTopGroupBlock()) {
+    QString genName = "clkrstgen_" + QString::number(idGen);
+    clkrstItem = item->getScene()->searchBoxItemByName(genName);
+    if (clkrstItem == NULL) {
+      throw(Exception(IFACE_TOP_NOCLKRSTGEN));
+    }
+    else {
+      fromIfaceItemClk = clkrstItem->searchInterfaceItemByName("clk");
+    }
+    cout << "connecting clock of " << qPrintable(item->getRefBlock()->getName()) << " to clk of " << qPrintable(genName) << endl;
+  }
+  else {
+    // searching for ext_clk_idGen
+    QString name = "ext_clk_"+QString::number(idGen);
+    fromIfaceItemClk = parentGroup->searchInterfaceItemByName(name);
+    cout << "connecting clock of " << qPrintable(item->getRefBlock()->getName()) << " to " << qPrintable(name) << " of parent group " << qPrintable(parentGroup->getRefBlock()->getName()) << endl;
+  }
+
+  if (fromIfaceItemClk == NULL) {
+    throw(Exception(IFACE_GROUP_NOCLKRST));
+  }
+  else {
+    createConnection(context, fromIfaceItemClk, toIfaceItemClk, false);
+    cout << "connection done."  << endl;
+  }
+}
+
+void Dispatcher::connectBoxItemReset(Context context, BoxItem *item, QString rstName, int idGen) throw(Exception) {
+
+  static QString fctName = "Dispatcher::connectBoxItemReset()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+  InterfaceItem* fromIfaceItemRst = NULL;
+  InterfaceItem* toIfaceItemRst = item->searchInterfaceItemByName(rstName);
+  GroupItem* parentGroup = item->getScene()->getGroupItem();
+  BoxItem* clkrstItem = NULL;
+
+  if (parentGroup->getRefBlock()->isTopGroupBlock()) {
+    QString genName = "clkrstgen_" + QString::number(idGen);
+    clkrstItem = item->getScene()->searchBoxItemByName(genName);
+    if (clkrstItem == NULL) {
+      throw(Exception(IFACE_TOP_NOCLKRSTGEN));
+    }
+    else {
+      fromIfaceItemRst = clkrstItem->searchInterfaceItemByName("reset");
+    }
+    cout << "connecting reset of " << qPrintable(item->getRefBlock()->getName()) << " to reset of " << qPrintable(genName) << endl;
+  }
+  else {
+    // searching for ext_rst_idGen
+    QString name = "ext_rst_"+QString::number(idGen);
+    fromIfaceItemRst = parentGroup->searchInterfaceItemByName(name);
+    cout << "connecting reset of " << qPrintable(item->getRefBlock()->getName()) << " to " << qPrintable(name) << " of parent group " << qPrintable(parentGroup->getRefBlock()->getName()) << endl;
+  }
+
+  if (fromIfaceItemRst == NULL) {
+    throw(Exception(IFACE_GROUP_NOCLKRST));
+  }
+  else {
+    createConnection(context, fromIfaceItemRst, toIfaceItemRst, false);
+    cout << "connection done."  << endl;
+  }
+}
+
+void Dispatcher::connectStimuliItemClock(Context context, StimuliItem *item, QString clkName, int idGen) throw(Exception) {
+
+  static QString fctName = "Dispatcher::connectStimuliItemClock()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+  InterfaceItem* fromIfaceItemClk = NULL;
+  InterfaceItem* toIfaceItemClk = item->searchInterfaceItemByName(clkName);
+  BoxItem* clkrstItem = NULL;
+
+  QString genName = "clkrstgen_" + QString::number(idGen);
+  clkrstItem = item->getScene()->searchBoxItemByName(genName);
+  if (clkrstItem == NULL) {
+    throw(Exception(IFACE_TOP_NOCLKRSTGEN));
+  }
+  else {
+    fromIfaceItemClk = clkrstItem->searchInterfaceItemByName("clk");
+  }
+  cout << "connecting clock of " << qPrintable(item->getRefBlock()->getName()) << " to clock of " << qPrintable(genName) << endl;
+
+  if (fromIfaceItemClk == NULL) {
+    throw(Exception(IFACE_GROUP_NOCLKRST));
+  }
+  else {
+    createConnection(context, fromIfaceItemClk, toIfaceItemClk, false);
+    cout << "connection done."  << endl;
+  }
+}
+
+void Dispatcher::connectStimuliItemReset(Context context, StimuliItem *item, QString rstName, int idGen) throw(Exception) {
+  static QString fctName = "Dispatcher::connectStimuliItemReset()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+  InterfaceItem* fromIfaceItemRst = NULL;
+  InterfaceItem* toIfaceItemRst = item->searchInterfaceItemByName(rstName);
+  BoxItem* clkrstItem = NULL;
+
+  QString genName = "clkrstgen_" + QString::number(idGen);
+  clkrstItem = item->getScene()->searchBoxItemByName(genName);
+  if (clkrstItem == NULL) {
+    throw(Exception(IFACE_TOP_NOCLKRSTGEN));
+  }
+  else {
+    fromIfaceItemRst = clkrstItem->searchInterfaceItemByName("reset");
+  }
+  cout << "connecting reset of " << qPrintable(item->getRefBlock()->getName()) << " to reset of " << qPrintable(genName) << endl;
+
+  if (fromIfaceItemRst == NULL) {
+    throw(Exception(IFACE_GROUP_NOCLKRST));
+  }
+  else {
+    createConnection(context, fromIfaceItemRst, toIfaceItemRst, false);
+    cout << "connection done."  << endl;
+  }
+}
+
+
 void Dispatcher::showBlocksLibrary(){
   cout << "showing block library" << endl;
   mainWindow->getLibrary()->show();
   mainWindow->getLibrary()->raise();
 }
 
-void Dispatcher::showProperties(InterfaceItem *inter) {
-  new InterfacePropertiesWindow(inter);
+void Dispatcher::showProperties(Context context, InterfaceItem *inter) {
+
+  static QString fctName = "Dispatcher::showProperties()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
+
+  QDialog* dial = new InterfacePropertiesDialog(inter);
+  dial->exec();
 }
 
 /* connectInterToGroup() :
@@ -1061,7 +1577,17 @@ void Dispatcher::showProperties(InterfaceItem *inter) {
    That action will create a new InterfaceItem on the GroupItem and a connectionItem between the
    interfaces.
 */
-void Dispatcher::connectInterToGroup(InterfaceItem *item){
+void Dispatcher::connectInterToGroup(Context context, InterfaceItem *item){
+
+  static QString fctName = "Dispatcher::connectInterToGroup()";
+#ifdef DEBUG_FCTNAME
+  cout << "call to " << qPrintable(fctName) << endl;
+#endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   // getting the GroupBlock and GroupItem that are parent of the block that owns item
   ConnectedInterface *refInter = item->refInter;
@@ -1073,16 +1599,23 @@ void Dispatcher::connectInterToGroup(InterfaceItem *item){
   // creating/adding the group interface in the graph model
   GroupInterface *groupInter = new GroupInterface(parentBlock,refInter->getName()+"_group",refInter->getDirection(),refInter->getPurpose());  
   parentItem->getRefBlock()->addInterface(groupInter);
-  // creating/adding the group control interface in the graph model
-  GroupInterface *groupCtlInter = new GroupInterface(parentBlock,refInter->getName()+"_group_enb",refInter->getDirection(),AbstractInterface::Control);
-  groupCtlInter->setAssociatedIface(groupInter);
-  parentItem->getRefBlock()->addInterface(groupCtlInter);  
+  // creating/adding the group control interface in the graph model if the purpose is data
+  if (refInter->getPurpose() == AbstractInterface::Data) {
+    GroupInterface *groupCtlInter = new GroupInterface(parentBlock,refInter->getName()+"_group_enb",refInter->getDirection(),AbstractInterface::Control);
+    groupCtlInter->setAssociatedIface(groupInter);
+    parentItem->getRefBlock()->addInterface(groupCtlInter);
+  }
   // creating/adding the group interface in the current scene model, and connection item
   InterfaceItem *groupIfaceItem = new InterfaceItem(0,item->getOrientation(),groupInter,parentItem,params);
   parentItem->addInterfaceItem(groupIfaceItem,true);
 
   // creating the connection, in graph and with an item
-  createConnection(item, groupIfaceItem);
+  /* NOTE:
+     Since the group interface is for now unconnected, it is impossible to determine
+     its clock domain. Thus, the connection must be created without testing the clock domain
+     consistency. For that, we cheat by changing the context to Load because it implies no clock test.
+   */
+  createConnection(Load, item, groupIfaceItem);
 
   // if groupItem is not topGroup, must also add a new interface to the parent BlockItem
   BoxItem* parent2Item = parentItem->getParentItem();
@@ -1093,15 +1626,20 @@ void Dispatcher::connectInterToGroup(InterfaceItem *item){
 
 
   parentItem->getScene()->updateConnectionItemsShape();
-  unselectAllItems();
+  unselectAllItems(context);
   params->unsaveModif = true;
 }
 
-void Dispatcher::removeFunctionalInterface(InterfaceItem *item) {
+void Dispatcher::removeFunctionalInterface(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::removeBlockInterface()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   /* first, remove all connections from item
      NB:  if there is a connection to a group interface, then this
@@ -1111,7 +1649,7 @@ void Dispatcher::removeFunctionalInterface(InterfaceItem *item) {
      that allows to remove an interface.
    */
   foreach(ConnectionItem* conn, item->connections) {
-    removeConnection(conn);
+    removeConnection(context, conn);
   }
 
   ConnectedInterface* ref = item->refInter;
@@ -1120,17 +1658,22 @@ void Dispatcher::removeFunctionalInterface(InterfaceItem *item) {
   fun->removeInterface(ref);
 }
 
-void Dispatcher::removeGroupInterface(InterfaceItem *item) {
+void Dispatcher::removeGroupInterface(Context context, InterfaceItem *item) {
   static QString fctName = "Dispatcher::removeGroupInterface()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   /* NB: just remove all connections from/to this item, since when there are no more
      ones to a GroupItem, it is automatically deleted.
    */
   foreach(ConnectionItem* conn, item->connections) {
-    removeConnection(conn);
+    removeConnection(context, conn);
   }
 }
 
@@ -1198,11 +1741,16 @@ InterfaceItem* Dispatcher::getInterfaceItemById(int id) {
   return NULL;
 }
 
-void Dispatcher::findGraphModifications(FunctionalBlock *block) {
+void Dispatcher::findGraphModifications(Context context, FunctionalBlock *block) {
   static QString fctName = "Dispatcher::findGraphModifications()";
 #ifdef DEBUG_FCTNAME
   cout << "call to " << qPrintable(fctName) << endl;
 #endif
+  /* NB: only called in Design context */
+  if (context != Design) {
+    cout << "Abnormal case: call to " <<qPrintable(fctName) << " not in Design context" << endl;
+    return;
+  }
 
   block->computeAdmittanceDelays();
   // get the block item that is associated to block
@@ -1216,8 +1764,9 @@ void Dispatcher::findGraphModifications(FunctionalBlock *block) {
     QList<int>* delay = iterD.value();
     if (delay->at(0) > 0) {
       // create delay and associate it to the connected input
-      AbstractInputModifier* mod = new DelayInputModifier(delay->at(0));
-      ConnectedInterface* toIface = AI_TO_CON(iterD.key()->getAssociatedIface());
+
+      ConnectedInterface* toIface = AI_TO_CON(iterD.key());
+      AbstractInputModifier* mod = new DelayInputModifier(toIface, delay->at(0));
       cout << "modify input of " << qPrintable(toIface->getName()) << endl;
       toIface->setInputModifier(mod);
       // repaint