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SystemC vcd file cannot open GTKwave

Jeime_Rhee

By Jeime_Rhee
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Jeime_Rhee Member

Jeime_Rhee

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Hi

I'm learning SystemC language and I made a JK flipflop and 8bit counter using 8-JK flipflop there's no problem building project but if I running GTKwave using vcd trace file it cannot show anything. please help me

 

//test.h

#include "systemc.h"
 
SC_MODULE(test)
{
      sc_in<bool> clock;
      sc_out<bool>  go;
 
      void do_test();
 
      SC_CTOR(test)
      {
             SC_CTHREAD(do_test, clock);
             go.initialize(0);
      }
};
 
//test.cpp
#include "test.h"
 
void test::do_test()
{
      go.write(1);
      while(true)
      {
             wait(1);
      }
}
 
//JK_FlipFlop.h
#include "systemc.h"
 
SC_MODULE(JK_FlipFlop)
{
      sc_in<bool> Input_J; 
      sc_in<bool> Input_K; 
      sc_in<bool> Input_clk;
 
      sc_out<bool> Output_q1;
      sc_out<bool> Output_q2;
 
      void do_jk();
 
      SC_CTOR(JK_FlipFlop)
      {
             SC_METHOD(do_jk);
             sensitive<< Input_clk.neg() << Input_J << Input_K;
             Output_q1.initialize(0);
             Output_q2.initialize(1);
       }
};
 
//JK_FlipFlop.cpp
#include "JK_FlipFlop.h"
 
void JK_FlipFlop::do_jk()
{
       if(Input_J == true && Input_K == false)
       {
                 Output_q1.write(1);
                 Output_q2.write(0);
        }
 
       else if(Input_J == false && Input_K == true)
       {
                 Output_q1.write(0);
                 Output_q2.write(1);
       }
 
       else if(Input_J == true && Input_K == true)
      {
                 Output_q1.write(!Output_q1);
                 Output_q2.write(!Output_q2);
       }
 
      else
      {
                Output_q1.write(Output_q1);
                Output_q2.write(Output_q2);
       }
}
 
//counter.h
#include "JK_FlipFlop.h"
 
SC_MODULE(counter)
{
          sc_in<bool> clk, go;
          sc_out<unsigned char> value;
          sc_signal<bool> connect1; 
          sc_signal<bool> connect2;
          sc_signal<bool> connect3;
          sc_signal<bool> connect4;
          sc_signal<bool> connect5;
          sc_signal<bool> connect6;
          sc_signal<bool> connect7;
          sc_signal<bool> connect8;
          sc_signal<bool> no1, no2, no3, no4, no5, no6, no7, no8;
 
          JK_FlipFlop *FF1;
          JK_FlipFlop *FF2;
          JK_FlipFlop *FF3;
          JK_FlipFlop *FF4;
          JK_FlipFlop *FF5;
          JK_FlipFlop *FF6;
          JK_FlipFlop *FF7;
          JK_FlipFlop *FF8;
 
          void do_count();
          SC_CTOR(counter)
          {
                    FF1 = new JK_FlipFlop("jk1");
                    FF2 = new JK_FlipFlop("jk2");
                    FF3 = new JK_FlipFlop("jk3");
                    FF4 = new JK_FlipFlop("jk4");
                    FF5 = new JK_FlipFlop("jk5");
                    FF6 = new JK_FlipFlop("jk6");
                    FF7 = new JK_FlipFlop("jk7");
                    FF8 = new JK_FlipFlop("jk8");
 
                    FF1->Input_clk(clk); FF1->Input_J(go); FF1->Input_K(go); FF1->Output_q1(connect1); FF1->Output_q2(no1);
                    FF2->Input_clk(connect1); FF2->Input_J(go); FF2->Input_K(go); FF2->Output_q1(connect2); FF2->Output_q2(no2);
                    FF3->Input_clk(connect2); FF3->Input_J(go); FF3->Input_K(go); FF3->Output_q1(connect3); FF3->Output_q2(no3);
                    FF4->Input_clk(connect3); FF4->Input_J(go); FF4->Input_K(go); FF4->Output_q1(connect4); FF4->Output_q2(no4);
                    FF5->Input_clk(connect4); FF5->Input_J(go); FF5->Input_K(go); FF5->Output_q1(connect5); FF5->Output_q2(no5);
                    FF6->Input_clk(connect5); FF6->Input_J(go); FF6->Input_K(go); FF6->Output_q1(connect6); FF6->Output_q2(no6);
                    FF7->Input_clk(connect6); FF7->Input_J(go); FF7->Input_K(go); FF7->Output_q1(connect7); FF7->Output_q2(no7);
                    FF8->Input_clk(connect7); FF8->Input_J(go); FF8->Input_K(go); FF8->Output_q1(connect8); FF8->Output_q2(no8);
 
                    SC_METHOD(do_count);
                    sensitive << clk;
                    sensitive << go;
          }
};
 
//counter.cpp
#include "counter.h"
 
void counter::do_count()
{
          unsigned char local_value = 0;
 
          local_value |= (FF1->Output_q1)<<0;
          local_value |= (FF2->Output_q1)<<1;
          local_value |= (FF3->Output_q1)<<2;
          local_value |= (FF4->Output_q1)<<3;
          local_value |= (FF5->Output_q1)<<4;
          local_value |= (FF6->Output_q1)<<5;
          local_value |= (FF7->Output_q1)<<6;
          local_value |= (FF8->Output_q1)<<7;
 
          value.write(local_value);
}

 

 

//main.cpp

#include "counter.h"
#include "test.h"
 
int sc_main(int argc, char* argv[])
{
 
          sc_signal<unsigned char> Value;
          sc_signal<bool> Go;
 
 
          sc_clock CLK("clock", 50, SC_NS);
 
          counter COUNTER("ccc");
          COUNTER.clk(CLK);
          COUNTER.go(Go);
 
          COUNTER.value(Value);
 
 
          test TST("TST");
          TST.clock(CLK);
          TST.go(Go);
 
          sc_trace_file *tf = sc_create_vcd_trace_file("wave");
 
          sc_trace(tf, COUNTER.connect1, "jk1"); sc_trace(tf, COUNTER.connect2, "jk2"); sc_trace(tf, COUNTER.connect3, "jk3");
          sc_trace(tf, COUNTER.connect4, "jk4"); sc_trace(tf, COUNTER.connect5, "jk5"); sc_trace(tf, COUNTER.connect6, "jk6");
          sc_trace(tf, COUNTER.connect7, "jk7"); sc_trace(tf, COUNTER.connect8, "jk8");
 
          sc_trace(tf, CLK, "clock"); sc_trace(tf, Value, "SystemC value");
 
          sc_start(20000, SC_NS);
          sc_close_vcd_trace_file(tf);
 
          return(0);
}
 
 
 
 
test is making signal always true
 
jk flip-flop working only falling edge so I'm using clk.neg()
 
counter have 8 flip-flop. first flip-flop clock accept main clock and second flip flop accept first flip-flop's q1 value the other flip-flop connected same way to second flip-flop
 
is there any problem??
 
I can't find any problem but I can't see anything in GTKwave
 
please tell me why. I need your help
 
(P.S : Actually I can't speaking English very well. so please understand I'm using wrong grammar or vocabulary. Thanks)
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dakupoto Advanced Member

dakupoto

Posted
Posted

Hi

I'm learning SystemC language and I made a JK flipflop and 8bit counter using 8-JK flipflop there's no problem building project but if I running GTKwave using vcd trace file it cannot show anything. please help me

 

//test.h

#include "systemc.h"
 
SC_MODULE(test)
{
      sc_in<bool> clock;
      sc_out<bool>  go;
 
      void do_test();
 
      SC_CTOR(test)
      {
             SC_CTHREAD(do_test, clock);
             go.initialize(0);
      }
};
 
//test.cpp

#include "test.h"
 
void test::do_test()
{
      go.write(1);
      while(true)
      {
             wait(1);
      }
}
 

//JK_FlipFlop.h
#include "systemc.h"
 
SC_MODULE(JK_FlipFlop)
{
      sc_in<bool> Input_J; 
      sc_in<bool> Input_K; 
      sc_in<bool> Input_clk;
 
      sc_out<bool> Output_q1;
      sc_out<bool> Output_q2;
 
      void do_jk();
 
      SC_CTOR(JK_FlipFlop)
      {
             SC_METHOD(do_jk);
             sensitive<< Input_clk.neg() << Input_J << Input_K;
             Output_q1.initialize(0);
             Output_q2.initialize(1);
       }
};
 
//JK_FlipFlop.cpp

#include "JK_FlipFlop.h"
 
void JK_FlipFlop::do_jk()
{
       if(Input_J == true && Input_K == false)
       {
                 Output_q1.write(1);
                 Output_q2.write(0);
        }
 
       else if(Input_J == false && Input_K == true)
       {
                 Output_q1.write(0);
                 Output_q2.write(1);
       }
 
       else if(Input_J == true && Input_K == true)
      {
                 Output_q1.write(!Output_q1);
                 Output_q2.write(!Output_q2);
       }
 
      else
      {
                Output_q1.write(Output_q1);
                Output_q2.write(Output_q2);
       }
}
 
//counter.h

#include "JK_FlipFlop.h"
 
SC_MODULE(counter)
{
          sc_in<bool> clk, go;
          sc_out<unsigned char> value;
          sc_signal<bool> connect1; 
          sc_signal<bool> connect2;
          sc_signal<bool> connect3;
          sc_signal<bool> connect4;
          sc_signal<bool> connect5;
          sc_signal<bool> connect6;
          sc_signal<bool> connect7;
          sc_signal<bool> connect8;
          sc_signal<bool> no1, no2, no3, no4, no5, no6, no7, no8;
 
          JK_FlipFlop *FF1;
          JK_FlipFlop *FF2;
          JK_FlipFlop *FF3;
          JK_FlipFlop *FF4;
          JK_FlipFlop *FF5;
          JK_FlipFlop *FF6;
          JK_FlipFlop *FF7;
          JK_FlipFlop *FF8;
 
          void do_count();
          SC_CTOR(counter)
          {
                    FF1 = new JK_FlipFlop("jk1");
                    FF2 = new JK_FlipFlop("jk2");
                    FF3 = new JK_FlipFlop("jk3");
                    FF4 = new JK_FlipFlop("jk4");
                    FF5 = new JK_FlipFlop("jk5");
                    FF6 = new JK_FlipFlop("jk6");
                    FF7 = new JK_FlipFlop("jk7");
                    FF8 = new JK_FlipFlop("jk8");
 
                    FF1->Input_clk(clk); FF1->Input_J(go); FF1->Input_K(go); FF1->Output_q1(connect1); FF1->Output_q2(no1);
                    FF2->Input_clk(connect1); FF2->Input_J(go); FF2->Input_K(go); FF2->Output_q1(connect2); FF2->Output_q2(no2);
                    FF3->Input_clk(connect2); FF3->Input_J(go); FF3->Input_K(go); FF3->Output_q1(connect3); FF3->Output_q2(no3);
                    FF4->Input_clk(connect3); FF4->Input_J(go); FF4->Input_K(go); FF4->Output_q1(connect4); FF4->Output_q2(no4);
                    FF5->Input_clk(connect4); FF5->Input_J(go); FF5->Input_K(go); FF5->Output_q1(connect5); FF5->Output_q2(no5);
                    FF6->Input_clk(connect5); FF6->Input_J(go); FF6->Input_K(go); FF6->Output_q1(connect6); FF6->Output_q2(no6);
                    FF7->Input_clk(connect6); FF7->Input_J(go); FF7->Input_K(go); FF7->Output_q1(connect7); FF7->Output_q2(no7);
                    FF8->Input_clk(connect7); FF8->Input_J(go); FF8->Input_K(go); FF8->Output_q1(connect8); FF8->Output_q2(no8);
 
                    SC_METHOD(do_count);
                    sensitive << clk;
                    sensitive << go;
          }
};
 
//counter.cpp

#include "counter.h"
 
void counter::do_count()
{
          unsigned char local_value = 0;
 
          local_value |= (FF1->Output_q1)<<0;
          local_value |= (FF2->Output_q1)<<1;
          local_value |= (FF3->Output_q1)<<2;
          local_value |= (FF4->Output_q1)<<3;
          local_value |= (FF5->Output_q1)<<4;
          local_value |= (FF6->Output_q1)<<5;
          local_value |= (FF7->Output_q1)<<6;
          local_value |= (FF8->Output_q1)<<7;
 
          value.write(local_value);
}

 

 

//main.cpp

#include "counter.h"
#include "test.h"
 
int sc_main(int argc, char* argv[])
{
 
          sc_signal<unsigned char> Value;
          sc_signal<bool> Go;
 
 
          sc_clock CLK("clock", 50, SC_NS);
 
          counter COUNTER("ccc");
          COUNTER.clk(CLK);
          COUNTER.go(Go);
 
          COUNTER.value(Value);
 
 
          test TST("TST");
          TST.clock(CLK);
          TST.go(Go);
 
          sc_trace_file *tf = sc_create_vcd_trace_file("wave");
 
          sc_trace(tf, COUNTER.connect1, "jk1"); sc_trace(tf, COUNTER.connect2, "jk2"); sc_trace(tf, COUNTER.connect3, "jk3");
          sc_trace(tf, COUNTER.connect4, "jk4"); sc_trace(tf, COUNTER.connect5, "jk5"); sc_trace(tf, COUNTER.connect6, "jk6");
          sc_trace(tf, COUNTER.connect7, "jk7"); sc_trace(tf, COUNTER.connect8, "jk8");
 
          sc_trace(tf, CLK, "clock"); sc_trace(tf, Value, "SystemC value");
 
          sc_start(20000, SC_NS);
          sc_close_vcd_trace_file(tf);
 
          return(0);
}
 
 
 
 
test is making signal always true
 
jk flip-flop working only falling edge so I'm using clk.neg()
 
counter have 8 flip-flop. first flip-flop clock accept main clock and second flip flop accept first flip-flop's q1 value the other flip-flop connected same way to second flip-flop
 
is there any problem??
 
I can't find any problem but I can't see anything in GTKwave
 
please tell me why. I need your help
 
(P.S : Actually I can't speaking English very well. so please understand I'm using wrong grammar or vocabulary. Thanks)

 

Hello Sir,

To set up the VCD trace output, please set the time step as :

 

  sc_core::sc_trace_file *fp;

  fp = sc_create_vcd_trace_file("<tracefilename>");

  fp->set_time_unit(1.0, sc_core::SC_NS);

  .....

  /* connect output streams to VCD trace file */

  sc_core::sc_trace(fp, <streamname>, "name");

  .....

  /* Finally close trace file at end of simulation */

  sc_core::sc_stop();

  sc_core::sc_close_vcd_trace_file(fp);

  return 0;

  Also, in your counter module you use "new" to dynamically

  create the JK flip flop objects. But there are no corresponding

  "delete" in the module destructor. In fact, there is no module

  destructor.

  Finally, first put in some print statements to check that the 

  correct output is being generated before directing the output

  to the VCD trace files. The question is -- is your code doing

  exactly what it is supposed to do ? Hope that helps.

 

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Jeime_Rhee Member

Jeime_Rhee

Posted
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Posted

Thank you for your reply Dev, dakupoto

That code correctly work that I expected.

I check counter's value and that code can export vcd file but if I try to open in GTKwave using vcd file it does not work. even GTKwave doesn't running.

I changed the code dakupoto's way but it still doesn't work.

I have the other code that mostly same this code also don't using 'delete' operator but the other code is working.

so I post this question.

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