Пример #1
0
// Value related functions
int VhpiSignalObjHdl::set_signal_value(int value)
{
    switch (m_value.format) {
        case vhpiEnumVal:
        case vhpiLogicVal: {
            m_value.value.enumv = value ? vhpi1 : vhpi0;
            break;
        }

        case vhpiEnumVecVal:
        case vhpiLogicVecVal: {
            unsigned int i;
            for (i=0; i<m_size; i++)
                m_value.value.enumvs[m_size-i-1] = value&(1<<i) ? vhpi1 : vhpi0;

            break;
        }

        default: {
            LOG_CRITICAL("VHPI type of object has changed at runtime: ABORTING");
        }
    }
    vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiForcePropagate);
    check_vhpi_error();
    return 0;
}
Пример #2
0
// Value related functions
int VhpiLogicSignalObjHdl::set_signal_value(long value)
{
    switch (m_value.format) {
        case vhpiEnumVal:
        case vhpiLogicVal: {
            m_value.value.enumv = value ? vhpi1 : vhpi0;
            break;
        }

        case vhpiEnumVecVal:
        case vhpiLogicVecVal: {
            int i;
            for (i=0; i<m_num_elems; i++)
                m_value.value.enumvs[m_num_elems-i-1] = value&(1<<i) ? vhpi1 : vhpi0;

            m_value.numElems = m_num_elems;
            break;
        }

        default: {
            LOG_ERROR("VHPI: Unable to set a std_logic signal with a raw value");
            return -1;
        }
    }

    if (vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiDepositPropagate)) {
        check_vhpi_error();
        return -1;
    }

    return 0;
}
Пример #3
0
int VhpiLogicSignalObjHdl::set_signal_value(std::string &value)
{
    switch (m_value.format) {
        case vhpiEnumVal:
        case vhpiLogicVal: {
            m_value.value.enumv = chr2vhpi(value.c_str()[0]);
            break;
        }

        case vhpiEnumVecVal:
        case vhpiLogicVecVal: {
            int len = value.length();

            // Since we may not get the numElems correctly from the sim and have to infer it
            // we also need to set it here as well each time.

            m_value.numElems = len;

            if (len > m_num_elems) {
                LOG_DEBUG("VHPI: Attempt to write string longer than (%s) signal %d > %d",
                          m_name.c_str(), len, m_num_elems);
                m_value.numElems = m_num_elems;
            }

            std::string::iterator iter;

            int i = 0;
            for (iter = value.begin();
                 (iter != value.end()) && (i < m_num_elems);
                 iter++, i++) {
                m_value.value.enumvs[i] = chr2vhpi(*iter);
            }

            // Fill bits at the end of the value to 0's
            for (i = len; i < m_num_elems; i++) {
                m_value.value.enumvs[i] = vhpi0;
            }

            break;
        }

        default: {
           LOG_ERROR("VHPI: Unable to set a std_logic signal with a raw value");
           return -1;
        }
    }

    if (vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiDepositPropagate)) {
        check_vhpi_error();
        return -1;
    }

    return 0;
}
Пример #4
0
static void start_of_sim(const vhpiCbDataT *cb_data)
{
   vhpi_printf("start of sim callback! user data is '%s'",
               (char *)cb_data->user_data);

   long cycles;
   vhpiTimeT now;
   vhpi_get_time(&now, &cycles);

   fail_unless(now.low == 0);
   fail_unless(now.high == 0);
   fail_unless(cycles == 0);

   vhpiValueT value = {
      .format = vhpiObjTypeVal
   };
   vhpi_get_value(handle_x, &value);
   check_error();
   fail_unless(value.format == vhpiIntVal);
   fail_unless(value.value.intg == 0);

   value.value.intg = 5;
   vhpi_put_value(handle_x, &value, vhpiForcePropagate);
   check_error();

   vhpiTimeT time_5ns = {
      .low = 5000000
   };

   vhpiCbDataT cb_data2 = {
      .reason = vhpiCbAfterDelay,
      .cb_rtn = after_5ns,
      .time   = &time_5ns
   };
   vhpi_register_cb(&cb_data2, 0);
   check_error();
}

static void end_of_sim(const vhpiCbDataT *cb_data)
{
   vhpi_printf("end of sim callback");

   vhpiValueT value = {
      .format = vhpiObjTypeVal
   };
   vhpi_get_value(handle_y, &value);
   check_error();
   fail_unless(value.format == vhpiIntVal);
   fail_unless(value.value.intg == 75);

   vhpi_release_handle(handle_x);
   vhpi_release_handle(handle_y);
   vhpi_release_handle(handle_sos);
}
Пример #5
0
int VhpiSignalObjHdl::set_signal_value(std::string &value)
{
    switch (m_value.format) {
        case vhpiEnumVal:
        case vhpiLogicVal: {
            m_value.value.enumv = chr2vhpi(value.c_str()[0]);
            break;
        }

        case vhpiEnumVecVal:
        case vhpiLogicVecVal: {

            unsigned int len = value.length();

            if (len > m_size)  {
                LOG_ERROR("VHPI: Attempt to write string longer than signal %d > %d",
                          len, m_size);
                return -1;
            }

            std::string::iterator iter;

            unsigned int i = 0;
            for (iter = value.begin();
                 iter != value.end();
                 iter++, i++) {
                m_value.value.enumvs[i] = chr2vhpi(*iter);
            }

            // Fill bits at the end of the value to 0's
            for (i = len; i < m_size; i++) {
                m_value.value.enumvs[i] = vhpi0;
            }

            break;
        }

        default: {
           LOG_CRITICAL("VHPI type of object has changed at runtime: ABORTING");
        }
    }

    vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiForcePropagate);
    check_vhpi_error();
    return 0;
}
Пример #6
0
// Value related functions
int VhpiSignalObjHdl::set_signal_value(long value)
{
    switch (m_value.format) {
        case vhpiEnumVecVal:
        case vhpiLogicVecVal: {
            int i;
            for (i=0; i<m_num_elems; i++)
                m_value.value.enumvs[m_num_elems-i-1] = value&(1<<i);

            // Since we may not get the numElems correctly from the sim and have to infer it
            // we also need to set it here as well each time.

            m_value.numElems = m_num_elems;
            break;
        }

        case vhpiLogicVal:
        case vhpiEnumVal: {
            m_value.value.enumv = value;
            break;
        }

        case vhpiIntVal: {
            m_value.value.intg = value;
            break;
        }

        case vhpiCharVal: {
            m_value.value.ch = value;
            break;
        }

        default: {
            LOG_ERROR("VHPI: Unable to handle this format type %s",
                      ((VhpiImpl*)GpiObjHdl::m_impl)->format_to_string(m_value.format));
            return -1;
        }
    }
    if (vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiDepositPropagate)) {
        check_vhpi_error();
        return -1;
    }

    return 0;
}
Пример #7
0
int VhpiSignalObjHdl::set_signal_value(double value)
{
    switch (m_value.format) {
        case vhpiRealVal:
            m_value.numElems = 1;
            m_value.bufSize = sizeof(value);
            m_value.value.real = value;
            break;

        default: {
            LOG_ERROR("VHPI: Unable to set a Real handle this format type %s",
                      ((VhpiImpl*)GpiObjHdl::m_impl)->format_to_string(m_value.format));
            return -1;
        }

    }

    if (vhpi_put_value(GpiObjHdl::get_handle<vhpiHandleT>(), &m_value, vhpiDepositPropagate)) {
        check_vhpi_error();
        return -1;
    }

    return 0;
}
Пример #8
0
// this function updates object's value of index in in information table
bool objUpdateMain( int i , TValObjPtrs* _pValObjs, void* _pVar, int _bVarType)
{
	if ( ( (_pValObjs[i].vValue)->format == vhpiEnumVal ) && ( ( _bVarType == typeIntVar ) || ( ( _pValObjs[i].nType == 0 ) && ( _bVarType == typeDefaultVar ) ) ) )
	{			  
	// if scalar enum object and int variable (default for scalar objects of non-logic enum type)
		if (( _pVar )) 
			// if user variable specified, copies it to port structure
			*(_pValObjs[i].pIntVar) = *(int*)_pVar;			
		// updates value structure with variable value
		(_pValObjs[i].vValue)->value.enumv = *(_pValObjs[i].pIntVar);	
		if ( ( *(_pValObjs[i].pIntVar) > _pValObjs[i].enumMax ) || ( *(_pValObjs[i].pIntVar) < _pValObjs[i].enumMin ) )
			vhpi_printf( "objUpdate(): Variable value %d exceeds %s type's range.\n", *(_pValObjs[i].pIntVar), _pValObjs[i].szName );
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiEnumVal ) && ( ( _bVarType == typeBoolVar ) || ( ( _pValObjs[i].nType == 1 ) && ( _bVarType == typeDefaultVar ) ) ) )
	{
	// if scalar enum object and bool variable (default for scalar objects of logic enum type)
		if (( _pVar )) // if user variable specified, copies it to port structure
			*(_pValObjs[i].pBoolVar) = *(bool*)_pVar;
		// updates value structure with variable value
		if ( _pValObjs[i].nType == 0 ) 
			// if non-logic enum type
			(_pValObjs[i].vValue)->value.enumv = *(_pValObjs[i].pBoolVar) ? 1 : 0;
		if ( _pValObjs[i].nType == 1 )
			// if logic enum type
			(_pValObjs[i].vValue)->value.enumv = *(_pValObjs[i].pBoolVar) ? _pValObjs[i].enumOnes[0] : _pValObjs[i].enumZeros[0];
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiEnumVecVal ) && ( ( _bVarType == typeIntVecVar ) || ( ( _pValObjs[i].nType == 0 ) && ( _bVarType == typeDefaultVar ) ) ) )
	{
	// if vector of enum object and int[n] variable (default for vector objects of non-logic enum type)
		if (( _pVar )) 
			// if user variable specified, copies it to port structure
			memcpy( _pValObjs[i].pIntVecVar, _pVar, _pValObjs[i].vValue->bufSize );
		// updates value structure with variable value
		for ( int j = 0; j < _pValObjs[i].vValue->numElems; j++ )
		{																	
			// check if integer value fits the object type range
			if ( ( _pValObjs[i].pIntVecVar[j] <= _pValObjs[i].enumMax ) && ( _pValObjs[i].pIntVecVar[j] >= _pValObjs[i].enumMin ) )
				(_pValObjs[i].vValue)->value.enumvs[j] = _pValObjs[i].pIntVecVar[j];
			else																	
			{													
				// if integer value exceeds the object type range
				vhpi_printf( "objUpdate(): Variable value %d exceeds %s type range. Object value set to the leftmost value in type\n", _pValObjs[i].pIntVecVar[j], _pValObjs[i].szName );
				(_pValObjs[i].vValue)->value.enumvs[j] = _pValObjs[i].enumMin;
			}
		}
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiEnumVecVal ) &&  ( _bVarType == typeBoolVecVar ) )
	{
	// if vector of enum object and bool[n] variable 
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			memcpy( _pValObjs[i].pBoolVecVar, _pVar, _pValObjs[i].vValue->bufSize );
		// updates value structure with variable value
		if ( _pValObjs[i].nType == 0 )		
		// if non-logic type
			for ( int j = 0; j < _pValObjs[i].vValue->numElems; j++ )
				(_pValObjs[i].vValue)->value.enumvs[j] = _pValObjs[i].pBoolVecVar[j] ? _pValObjs[i].enumMin + 1 : _pValObjs[i].enumMin;
		if ( _pValObjs[i].nType == 1 )		
		// if logic type
			for ( int j = 0; j < _pValObjs[i].vValue->numElems; j++ )
				(_pValObjs[i].vValue)->value.enumvs[j] = _pValObjs[i].pBoolVecVar[j] ? _pValObjs[i].enumOnes[0] : _pValObjs[i].enumZeros[0];
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiEnumVecVal ) &&  ( _pValObjs[i].nType == 1 ) && ( ( _bVarType == typeIntVar ) || ( _bVarType == typeDefaultVar ) ) )
	{
	// if vector of enum object and int variable (default for vector objects of logic enum type)
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			memcpy( _pValObjs[i].pIntVar, _pVar, _pValObjs[i].vValue->bufSize );
		// updates value structure with variable value
		int2logicv( _pValObjs[i] );	
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiIntVal ) && ( ( _bVarType == typeIntVar ) || ( _bVarType == typeDefaultVar ) ) ) 
	{
	// if integer port and int variable (default for integer ports)
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			*(_pValObjs[i].pIntVar) = *(int*)_pVar;
		// updates value structure with variable value
		(_pValObjs[i].vValue)->value.intg = *(_pValObjs[i].pIntVar);
	}										
	else if ( ( (_pValObjs[i].vValue)->format == vhpiIntVecVal ) && ( ( _bVarType == typeIntVecVar ) || ( _bVarType == typeDefaultVar ) ) ) 
	{
	// if array of integer port and int[n] variable (default for array of integer port)
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			memcpy( _pValObjs[i].pIntVecVar, _pVar, _pValObjs[i].vValue->bufSize );
		// updates value structure with variable value
		for ( int j = 0; j < _pValObjs[i].vValue->numElems; j++ )
			(_pValObjs[i].vValue)->value.intgs[j] = _pValObjs[i].pIntVecVar[j];
	}										
	else if ( ( (_pValObjs[i].vValue)->format == vhpiRealVal ) && ( ( _bVarType == typeRealVar ) || ( _bVarType == typeDefaultVar ) ) ) 
	{
	// if real port and double variable (default for real port)
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			*(_pValObjs[i].pRealVar) = *(double*)_pVar;
		// updates value structure with variable value
		(_pValObjs[i].vValue)->value.real = *(_pValObjs[i].pRealVar);
	}
	else if ( ( (_pValObjs[i].vValue)->format == vhpiRealVecVal ) && ( ( _bVarType == typeRealVecVar ) || ( _bVarType == typeDefaultVar ) ) ) 
	{
	// if array of real port and double[n] variable (default for array of real port)
		if (( _pVar )) 
		// if user variable specified, copies it to port structure
			memcpy( _pValObjs[i].pRealVecVar, _pVar, _pValObjs[i].vValue->bufSize );
		// updates value structure with variable value
		for ( int j = 0; j < _pValObjs[i].vValue->numElems; j++ )
			(_pValObjs[i].vValue)->value.reals[j] = _pValObjs[i].pRealVecVar[j];
	}
	else
	{
		vhpi_printf( "objUpdate(): Object %s type is not supported\n", _pValObjs[i].szName  );
		return false;	
	}						
	
	vhpiErrorInfoT errInf;	
	if ( ( vhpi_put_value( _pValObjs[i].hHdl, _pValObjs[i].vValue, vhpiDepositPropagate ) ) == 0 )
	{
		// vhpi_printf("Signal value update succeeded\n");
		return true;
	}	
	else
	{
		vhpi_printf( "objUpdate(): Object %s value update failed\n", _pValObjs[i].szName );
		// check error info from vhpi_put_value()
		if ( vhpi_check_error( &errInf ) )
			vhpi_printf( "objUpdate(): vhpi_check_error() message: \n", errInf.message );
		else
			vhpi_printf( "objUpdate(): No vhpi_check_error() message...\n" ); 
		return false;	
	}
}
Пример #9
0
static void test_bin_str(void)
{
   vhpiHandleT root = vhpi_handle(vhpiRootInst, NULL);
   check_error();

   vhpiHandleT hb = vhpi_handle_by_name("b", root);
   check_error();

   vhpiHandleT hv = vhpi_handle_by_name("v", root);
   check_error();

   char b_str[2] = { 0xff, 0xff };
   vhpiValueT b_value = {
      .format    = vhpiBinStrVal,
      .bufSize   = sizeof(b_str),
      .value.str = (vhpiCharT *)b_str
   };
   vhpi_get_value(hb, &b_value);
   check_error();

   vhpi_printf("b bit string '%s' %x", b_str);
   fail_unless(strcmp(b_str, "0") == 0);

   vhpiValueT v_value = {
      .format    = vhpiBinStrVal,
      .bufSize   = 0,
      .value.str = NULL
   };
   const int need = vhpi_get_value(hv, &v_value);
   check_error();

   vhpi_printf("need %d bytes for v string", need);

   v_value.value.str = malloc(need);
   v_value.bufSize   = need;
   fail_if(v_value.value.str == NULL);
   fail_unless(vhpi_get_value(hv, &v_value) == 0);
   check_error();

   vhpi_printf("v bit string '%s'", v_value.value.str);
   fail_unless(strcmp((char *)v_value.value.str, "0011") == 0);
   free(v_value.value.str);

   vhpi_release_handle(root);
   vhpi_release_handle(hb);
   vhpi_release_handle(hv);
}

static void y_value_change(const vhpiCbDataT *cb_data)
{
   vhpiValueT value = {
      .format = vhpiObjTypeVal
   };
   vhpi_get_value(handle_y, &value);
   check_error();
   fail_unless(value.format == vhpiIntVal);

   vhpi_printf("y value changed to %d", value.value.intg);

   if (value.value.intg == 75) {
      test_bin_str();

      vhpi_control(vhpiFinish);
      check_error();
   }
   else {
      value.value.intg++;
      vhpi_put_value(handle_x, &value, vhpiForcePropagate);
      check_error();
   }
}

static void after_5ns(const vhpiCbDataT *cb_data)
{
   vhpi_printf("after_5ns callback!");

   long cycles;
   vhpiTimeT now;
   vhpi_get_time(&now, &cycles);

   fail_unless(now.low == 5000000);
   fail_unless(now.high == 0);
   fail_unless(cycles == 0);

   vhpiValueT value = {
      .format = vhpiObjTypeVal
   };
   vhpi_get_value(handle_y, &value);
   check_error();
   fail_unless(value.format == vhpiIntVal);
   fail_unless(value.value.intg == 6);

   value.value.intg = 70;
   vhpi_put_value(handle_x, &value, vhpiForcePropagate);
   check_error();

   vhpiCbDataT cb_data2 = {
      .reason = vhpiCbValueChange,
      .cb_rtn = y_value_change,
      .obj    = handle_y
   };
   vhpi_register_cb(&cb_data2, 0);
   check_error();
}
Пример #10
0
//----------------------------------------------------------------------------
// Callback for signal value changing event									  
//---------------------------------------------------------------------------- 
PLI_VOID SignalChangedEvent (const struct vhpiCbDataS * cbDatap)
{ 
 int signalValue = 0;	
 
 vhpiHandleT SigHdl; 
 vhpiValueT  *value;
 
 value = (vhpiValueT*) malloc(sizeof(vhpiValueT));
 value->format = vhpiEnumVal; 
 
  
 if (cbDatap->obj){
		// display information about current signal
		vhpi_printf("E V E N T : signal %s has value %c at time : %u\n",
				vhpi_get_str(vhpiNameP,cbDatap->obj), 
				cbDatap->value->value.ch,
				cbDatap->time->low);
				
 if(cbDatap->value->value.ch == '1')
  signalValue = 0;
 else	
  signalValue = 1;
				
 if(!strcmp(vhpi_get_str(vhpiNameP,cbDatap->obj),"CLK"))
 {
  invec_data.clock = signalValue;
   vhpi_printf("invec_data.clock = %d\n", signalValue);
 }
 else 
 {
 signalValue = !signalValue;
  vhpi_printf("invec_data.clear = %d\n", signalValue);
  invec_data.clear = signalValue;
 }
 				
 //-------------------------------------------------------------------------
 if ((invec_data.clock_prev == 0 && invec_data.clock == 1) || (invec_data.clock_prev == 1 && invec_data.clock == 0))
 {
  vhpi_printf("***********************************\n");
  vhpi_printf("Simulation time :  %u\n",cbDatap->time->low);
  vhpi_printf("Module : OSCIL : Read inputs\n"); 
  vhpi_printf("Port CLK=%d Port CLR=%d\n", invec_data.clock, invec_data.clear);
 vhpi_printf("Current Q %d\n", Q);
  //CLK'event and CLK = '1'
  if (invec_data.clock_prev == 0 && invec_data.clock == 1)
  {	
    vhpi_printf("CLK - Rising edge occured _|¯\n");
    if (!invec_data.clear)
	 Q = Q + 1;
  }
  else
  //CLK'event and CLK = '0'
  if (invec_data.clock_prev == 1 && invec_data.clock == 0)
  {	 
     vhpi_printf("CLK - Falling edge occured ¯|_\n");
     if (!invec_data.clear)
	  Q = Q + 1;
  }
  vhpi_printf("Current Q %d\n", Q);
  switch (Q) 
  {
   case 3 :  outvec_data.f0 = 1; 
             value->value.enumv = 3;
			 if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F0",0) ) )
			 {
  		      if(vhpi_put_value(SigHdl,value,vhpiForcePropagate))
			   vhpi_printf("E R R O R : Cannot update F0 port\n");
			 } 
			 else
			  vhpi_printf("E R R O R : Cannot get handler for F0 port\n");
    		 break; 
   case 4 :  outvec_data.f0 = 0;
             value->value.enumv = 2;
			 if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F0",0) ) )
			 {
  		      if(vhpi_put_value(SigHdl,value,vhpiForcePropagate))
			   vhpi_printf("E R R O R : Cannot update F0 port\n");
			 } 
			 else
			  vhpi_printf("E R R O R : Cannot get handler for F0 port\n");
    	     break; 				 
   case 7 :	 outvec_data.f1 = 1;
             value->value.enumv = 3;
			 if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F1",0) ) )
			 {
  		      if(vhpi_put_value(SigHdl,value,vhpiForcePropagate))
			   vhpi_printf("E R R O R : Cannot update F1 port\n");
			 } 
			 else
			  vhpi_printf("E R R O R : Cannot get handler for F1 port\n");
    	     break; 
   case 8 :	 outvec_data.f1 = 0;
             value->value.enumv = 2;   
			 if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F1",0) ) )
			 {
  		      if(vhpi_put_value(SigHdl,value,vhpiForcePropagate))
			   vhpi_printf("E R R O R : Cannot update F1 port\n");
			 } 
			 else
			  vhpi_printf("E R R O R : Cannot get handler for F1 port\n");
			 Q = 0;
    	     break; 
   default :
    	     break; 
  }	
 
  invec_data.clock_prev = invec_data.clock;
  invec_data.clear_prev = invec_data.clear;									 
    
  vhpi_printf("Module : OSCIL : Update outputs\n"); 
  vhpi_printf("Port F0=%d Port F1=%d\n", outvec_data.f0, outvec_data.f1);
  vhpi_printf("***********************************\n");
 } 
 //-------------------------------------------------------------------
 }
}
Пример #11
0
PLI_VOID oscil_c_vhpi_proc(const struct vhpiCbDataS *cb_data_p)
{
	vhpiCbDataT		cbDataAction;
	vhpiHandleT		SigHdl; 
	vhpiHandleT		CallbackHdl;
	vhpiValueT		value;
	vhpiTimeT		time;
	
	vhpiValueT  *initValue;
	
	vhpi_printf( "Registering signals CLK & CLR for event changes\n");
	vhpi_printf( "invec_data.clear = %d\n", invec_data.clear);
	vhpi_printf( "invec_data.clock = %d\n", invec_data.clock);
	//Entity: oscil_c_vhpi
	//port CLK	: in STD_LOGIC;
	//port CLR	: in STD_LOGIC;
	//port F0	: out STD_LOGIC;
	//port F1	: out STD_LOGIC;
		
	value.format			= vhpiCharVal;		 //signals are BIT
	cbDataAction.value		= &value;
	cbDataAction.reason		= vhpiCbValueChange; //on signal value change event
	cbDataAction.time		= &time;				
	cbDataAction.cb_rtn		= SignalChangedEvent;
	
	//get signal by name
	if ( (SigHdl = vhpi_handle_by_name(":UUT:U1:CLK",0) ) )
	{
		cbDataAction.obj = SigHdl; //connect callback to the signal

		//register 
		if ( (CallbackHdl = vhpi_register_cb(&cbDataAction, vhpiReturnCb) ) )
		{
			vhpi_printf("callback on signal %s registered \n",vhpi_get_str(vhpiNameP,SigHdl));
			registration = 1;
		}
		else
		{
			vhpi_printf("callback on signal %s NOT registered \n",vhpi_get_str(vhpiNameP,SigHdl));
			registration = 0;
		}
	}			

	//get signal by name 
	if ( (SigHdl = vhpi_handle_by_name(":UUT:U1:CLR",0) ) )
	{
		cbDataAction.obj = SigHdl; //connect callback to the signal

		//register 
		if ( (CallbackHdl = vhpi_register_cb(&cbDataAction, vhpiReturnCb) ) )
		{
			vhpi_printf("callback on signal %s registered \n",vhpi_get_str(vhpiNameP,SigHdl));
			registration = 1;
		}
		else
		{
			vhpi_printf("callback on signal %s NOT registered \n",vhpi_get_str(vhpiNameP,SigHdl));
			registration = 0;
		}
	}
	
	if(registration)
	{
     vhpi_printf("**********************************************************************\n");
     vhpi_printf("* Active-HDL - SystemC/VHDL/Verilog/EDIF/C/C++ interface initialized *\n");
	 vhpi_printf("* -----------------------VHPI VERSION------------------------------- *\n");
     vhpi_printf("**********************************************************************\n");

     invec_data.clock = 0;
     invec_data.clear = 0;
	 invec_data.clock_prev = invec_data.clock;
     invec_data.clear_prev = invec_data.clear;
	 Q = 0;	
	 
	 initValue = (vhpiValueT*) malloc(sizeof(vhpiValueT));
     initValue->format = vhpiEnumVal; 
     initValue->value.enumv = 2;
	 
	 //Initialize out port F0
	 if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F0",0) ) )
	 {
  	  if(vhpi_put_value(SigHdl,initValue,vhpiForcePropagate))
	   vhpi_printf("E R R O R : Cannot update F0 port\n");
	 } 
	 else
	  vhpi_printf("E R R O R : Cannot get handler for F0 port\n");

	 //Initialize out port F1
     if( (SigHdl = vhpi_handle_by_name(":UUT:U1:F1",0) ) )
	 {
  	  if(vhpi_put_value(SigHdl,initValue,vhpiForcePropagate))
	   vhpi_printf("E R R O R : Cannot update F1 port\n");
	 } 
	 else
	  vhpi_printf("E R R O R : Cannot get handler for F1 port\n");
	 
	}
	else
	{
     vhpi_printf("**************************************************************************\n");
     vhpi_printf("* Active-HDL - SystemC/VHDL/Verilog/EDIF/C/C++ interface not initialized *\n");
	 vhpi_printf("* -----------------------VHPI VERSION----------------------------------- *\n");
     vhpi_printf("**************************************************************************\n");
	}
}