Error in sc_fifo example

[Rahul_111]

•  

Hi.

I have taken this example from a book and tried to execute it,But i got few errors.

I am not able to find a right solution for this one.

Can someone please help me out with this. I have posted the code below

Thank you.

//main.cpp
#include "systemc"
#include "testbench.cpp"
#include "adder.cpp"

int sc_main(int argc, char *argv[])
{
  sc_core::sc_fifo<int> fifo(10);

  testbench tb("test");
  tb.TB_a(fifo);
  tb.TB_b(fifo);
  tb.TB_OUT(fifo);

  adder ad("adder");
  ad.a(fifo);
  ad.b(fifo);
  ad.out(fifo);
  
  sc_start(60, sc_core::SC_NS);

  return 0;
}

//testbench.cpp
#include "systemc"
SC_MODULE(testbench)
{
  sc_core::sc_fifo_out<int> TB_a, TB_b;
  sc_core::sc_fifo_in<int> TB_OUT;

  void adder()     // Testbench
  {
    wait(0, sc_core::SC_NS);
    TB_a = 0;
    TB_b = 0;

    wait(5, sc_core::SC_NS);
    TB_a = 5;
    TB_b = 0;

    wait(3, sc_core::SC_NS);
    TB_a = 5;
    TB_b = 10;

    wait(7, sc_core::SC_NS);
    TB_a = 5;
    TB_b = 1;

  }
  void output()
  {
    std::cout << sc_core::sc_time_stamp() << " : ";
    std::cout << "A= " << TB_a.read() << " B= " << TB_b.read();
    std::cout << " OUT= " << TB_OUT << std::endl;
  }
  SC_CTOR(testbench)
  {
    SC_METHOD(output);
    sensitive << TB_OUT;
    SC_THREAD(adder);
  }
};

//adder.cpp

#include "systemc"

SC_MODULE(adder)
{
  sc_core::sc_fifo_in<int> a, b;
  sc_core::sc_fifo_out<int> out;

  void add_input()
  {
      out.write(a.read() + b.read());
  }
  SC_CTOR(adder)
  {
    SC_METHOD(add_input);
    sensitive << a << b;
  }
};

 

[David Black]

What errors?

You cannot just assign to sc_fifo. You need to use an appropriate write() method or read() to get the values back.

Do you have an adequate training in C++.

What book had this code?