user defined data type signal assignment

[zareie.ehsan]

I'm new to SystemC and I have problem with signal assignment.

I defined a new data type "digit" :

 

class digit

{

public:

       sc_uint<4> dt;

 

       ///////constructor/////////

       digit (sc_uint<4> d=0)

       {

            dt=d;

       }

 

       digit& operator =(const digit& d) 

       {

            dt=d.dt;

            return(*this);

       }

}

 

here is the code I tried to assign a signal which is in digit  type

 

digit t1(3);

sc_signal <digit> d1;

d1.write(t1);

 

 

I also tried d1=t1 (operator= is overloaded in class digit) but signal d1 does not take the value of t1

would you pleas help me?

[apfitch]

How do you know the assignment is not working?

When are you printing out the assigned value?

 

Remember that you must wait at least a delta for a primitive channel to update.

 

There's more about user defined types and sc_signal here

 

http://www.doulos.com/knowhow/systemc/faq/#q1

 

regards

Alan

[zareie.ehsan]

when I debug the program using F10 line by line and check the value of the signals I found the value does not change after d1. write.

also with this below main() value is 0;

int sc_main(int argc,char* argv[])

{

   digit t1(8);

   sc_signal <digit> d1;

   d1.write(t1);

  cout<<"value:"<<d1<<endl;

}

 

 

[kocha]

Hi, zareie

 

Is digit class have "ostream& operator << ( ostream& os,  MyType const & v )" ?

[zareie.ehsan]

yes it has operator<<

[kocha]

Hi, zareie

 

I have fixed the problem.

Please try the following program.

 

int sc_main(int argc,char* argv[])

{

   digit t1(8);

   sc_signal <digit> d1;

   d1.write(t1);

   sc_start(10, SC_NS); // <- add

   cout<<"value:"<<d1<<endl;

}

 

Best regards,

Kocha

[apfitch]

when I debug the program using F10 line by line and check the value of the signals I found the value does not change after d1. write.

also with this below main() value is 0;

int sc_main(int argc,char* argv[])

{

   digit t1(8);

   sc_signal <digit> d1;

   d1.write(t1);

  cout<<"value:"<<d1<<endl;

}

 

 

 

Hi Zarie,

 that's what I meant by "you must wait a delta". If no time passes, a primitive channel does not update. Kocha's solution will work (adding a call to sc_start - in fact even sc_start(SC_ZERO_TIME)  should work.

 

regards

Alan

[zareie.ehsan]

thank you guys for your guide, it works