fifo example

[veeresh k]

Hi.

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

I have compared this code with std 2011 and made changes according to that like using namspace sc_core .

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

Can someone plese help me out with this.I have posted the code below along with the error,check it out.

Thank you.

 

 

//error//////////

In file included from testbench.cpp:6:0:
head1.h: In member function 'void www::woperation()':
head1.h:16:9: error: 'class sc_core::sc_port<sc_core::sc_fifo_out_if<int> >' has no member named 'write'
In file included from testbench.cpp:7:0:
head2.h: In member function 'void rrr::roperation()':
head2.h:17:9: error: 'class sc_core::sc_port<sc_core::sc_fifo_in_if<int> >' has no member named 'read'

 

 

 

////////code/////

#include<systemc.h>
#include"Head1.h"
#include"Head2.h"

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

    sc_fifo<int> fifo(10);

    writer w("writer");
    reader r("reader");
    w.out(fifo);
    r.in(fifo);

    sc_start(-1);

    return 0;

}

//header1
#include<systemc.h>
SC_MODULE(reader) {

    sc_port<sc_fifo_in_if<int> > in;

    void roperation()
    {

        int val;

        while (true)
        {
            wait(10, SC_NS)
                for (int i = 0; i <= 15; i++)
                {

                    in.read(val);

                    cout << val << endl;

                }
        }

        cout << "Availaible : " << in.num availaible() << endl;

    }

   SC_CTOR(writer)
    {
        SC_THREAD(woperation);

    }

};

 

//header2
#include<systemc.h>

SC_MODULE(writer)
{
    sc_port<sc_fifo_out_if<int> > out;

    void woperation()
    {

        int val = 0;
        while (true)
        {
            wait(10, SC_NS);
            for (int i = 0; i <= 20; i++)
            {
                out.write(val++);

            }
        }

    }

    SC_CTOR(writer)
    {
        SC_THREAD(woperation);

    }
};

[AmeyaVS]

Hello @veeresh k,

There are multiple issues in the sample code provided by you.

Here are the heavily modified version:

// main.cpp
#include<systemc>    //< Notice not systemc.h
#include"head1.h"
#include"head2.h"

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

  sc_core::sc_fifo<int> fifo(10); //< sc_core namespace specifier

  writer w("writer");
  reader r("reader");
  w.out(fifo);
  r.in(fifo);

  sc_start(1000, sc_core::SC_NS); //< Run simulation for a limited time since no stopping condition are provided upfront. Also time is also specified in sc_core namespace.

  return 0;

}

//head1.h
// Notice the HEADER GUARD
#ifndef HEAD1_H_
#define HEAD1_H_

// Changed the header file to systemc instead of systemc.h
#include<systemc>

SC_MODULE(reader) {
  // sc_fifo_in_if is a abstract class from which you cannot create an object.
  // sc_fifo_in is derived from the above class which actually implements the read method.
  sc_core::sc_fifo_in<int> in; 

  void roperation()
  {

    int val;

    while (true)
    {
      wait(10, sc_core::SC_NS); // Time unit is defined in sc_core namespace.
      for (int i = 0; i <= 15; i++)
      {

        in.read(val);

        std::cout << val << std::endl; //< when using the systemc header you need to specify the std namespace.
        // Or you can use the statement after including all the header files:
        // using namespace std

      }
    }

    std::cout << "Availaible : " << in.num_available() << std::endl; //< Instead of num available it is num_available
    //< when using the systemc header you need to specify the std namespace.
    // Or you can use the statement after including all the header files:
    // using namespace std

  }

  SC_CTOR(reader) //< Your code mentions here writer the constructor name should be same as the class name.
  {
    SC_THREAD(roperation); //< Your code mentions woperation

  }

};

#endif // HEAD1_H_

 

//head2.h
// Refer the head1.h for similar details
#ifndef HEAD2_H_
#define HEAD2_H_


#include<systemc>

SC_MODULE(writer)
{
  // Refer the head1.h for similar details
  sc_core::sc_fifo_out<int> out;

  void woperation()
  {

    int val = 0;
    while (true)
    {
      wait(10, sc_core::SC_NS);
      for (int i = 0; i <= 20; i++)
      {
        out.write(val++);

      }
    }

  }

  SC_CTOR(writer)
  {
    SC_THREAD(woperation);

  }
};
#endif // HEAD2_H_

Here is a minimal makefile for building the example:

CC=gcc
CXX=g++

CXX_FLAGS= -g3 -Wall -c

all: main.exe

main.exe: main.o
  ${CXX} $< -o $@ -L${SYSTEMC_HOME}/lib-linux64 -L${SYSTEMC_HOME}/lib -lsystemc

main.o: main.cpp head1.h head2.h
  ${CXX} ${CXX_FLAGS} -I${SYSTEMC_HOME}/include -o $@ $<

clean:
  rm -rf main.o main.exe

Note:

• For reference of the sc_fifo_in/out_if classes see here.

For more details you can also refer to the SystemC LRM.

Hope it helps.

Regards,
Ameya Vikram Singh

[veeresh k]

Hey ameya,

Thanks for taking out your time n helping me out by modifying code. ?

By seeing the developed code of yours,i can understand now that they had clearly mentioned the error while i was executing,but i dint get it.

And one more thing,I am trying to trace out the wave for the input and the output.

I have tried for different ways,but not getting the desired results.

One of the way was,i created 2 same signals with diff. name in testbench file and tried to trace ,but i was not successful in doing so.

Any suggestions to do? 

Thank you.:-)