How to schedule interrupt to trigger for next time?

[Minu]

Hi All,

I am trying to schedule interrupt of timer for next time as my current logic only executed interrupt only one time.

void call_overflow_interrupt(){
      //check overflow
      //cout<<"\nIn callInterrupts func\n";
      if((timer_cntrl &(1<<TIMER_CNTRL_OV))&& timer_val==0xff)
        {
          intr1=1;
          timer_intr_status=ENABLE(timer_intr_status,TIMER_OV_INTR);
          
        }
      else{
        cout<<"\ncall_overflow_interrupt is not coming\n";
      }
      
    }

And in SC_CTOR i am registering this process

    SC_METHOD(call_overflow_interrupt);
    sensitive<<Event;
    dont_initialize();
    Event.notify(256*20,SC_NS);//count=256(0xFF),clock period=20ns
    

I wrote above code but it is not scheduling the process for next time.How this can be achieved?

[tmp_sc]

SC_METHOD is like a cpp function, you need explicitly to trigger it's sensitivity list (in this case to notify Event again), otherwise it won't be re-entered.
E.g.
 

void call_overflow_interrupt(){
      //check overflow
      //cout<<"\nIn callInterrupts func\n";
      if((timer_cntrl &(1<<TIMER_CNTRL_OV))&& timer_val==0xff)
        {
          intr1=1;
          timer_intr_status=ENABLE(timer_intr_status,TIMER_OV_INTR);
          
        }
      else{
        cout<<"\ncall_overflow_interrupt is not coming\n";
      }
     // Added this line to trigger SC_METHOD's sensitivity
     Event.notify(256*20,SC_NS);//count=256(0xFF),clock period=20ns
      
    }

 

[Minu]

Thanks @tmp_sc for answering my question.But when I did as you suggested it is coming to else part.

One more thing ,like at 256*20 ns interrupt will enable . I want to disable interrupt after 20ns also.How this can be achieved in SC_METHOD?