binding issue

[Partha]

i am trying to implement i2c protocol using systemC. and i'm getting this error  some port binding fails.

cam anyone please resolve this problem ??

 

// Code your testbench here.
// Uncomment the next line for SystemC modules.
#include <systemc.h>
#include <stdlib.h>
class slave_if : public sc_interface
{
  public:
    virtual void write(int data) = 0;
      virtual void read() = 0;
};

SC_MODULE(Host)
{
     sc_in<bool> scl;
      sc_in<bool> sda;
      sc_in<bool> rw;
    sc_port<slave_if> host_port;
      int val;
      void behaviour()
    {
        if(scl == 1 && sda == 0 && rw == 0)
        {
              val = rand()%50;
            host_port->write(val);
        }
          else if(scl == 1 && sda == 0 && rw == 1)
        {
            host_port->read();
        }
    }
  SC_CTOR(Host)
  {
      SC_METHOD(behaviour);
    sensitive << scl << sda << rw;
  }
      
};

SC_MODULE(Master),public slave_if
{
    sc_in<bool> clk;
      sc_out<bool> scl;
      sc_out<bool> sda;
      sc_out<bool> rw;
      sc_fifo_out<int> master_write_fifo;
      sc_fifo_in<int> master_read_fifo;
      int i = 0,data_get,val,no_bits = 8;
      Host my_host;
  void write(int data)
  {
      while(no_bits!=0)
      {
          sda = data & 1;
          wait(SC_ZERO_TIME);
          master_write_fifo.write(sda);
          no_bits++;
      }
  }
  
  void read()
  {
      while(i!=8)
      {
        master_read_fifo.read(val);
        data_get = data_get + (val*pow(2,i));
        /*master_read_fifo.read(val);
        cout<<"value:->"<<val<<endl;*/
        i++;
      }
       cout<<"my data:-->"<<data_get;
  }
  
  SC_CTOR(Master):my_host("my_host")
  {
    my_host.scl(scl);
    my_host.sda(sda);
    my_host.rw(rw);
  }
};

SC_MODULE(Slave)
{
    sc_inout<bool> scl ;
      sc_inout<bool> sda ;
      sc_inout<bool> rw ;
      
      Master slave_master;
  
      SC_CTOR(Slave) : slave_master("slave_master")
    {
        slave_master.scl(scl);
          slave_master.sda(sda);
          slave_master.rw(rw);
    }
      
};

int sc_main(int argc , char* argv[])
{
  sc_clock clk("clk",1,SC_NS);
  sc_signal<bool> scl;
  sc_signal<bool> sda;
  sc_signal<bool> rw;
  sc_fifo<int> main_fifo;
  Master master("master");
  master.clk(clk);
  master.master_write_fifo(main_fifo);
  master.master_read_fifo(main_fifo);
  Slave slave("slave");
  scl.write(1);
  sda.write(0);
  rw.write(0);
  slave.scl(scl);
  slave.sda(sda);
  slave.rw(rw);
  
  sc_start();
  return 0;
}

 

Error: (E109) complete binding failed: port not bound: port 'slave.slave_master.my_host.port_3' (sc_port)
In file: ../../../../src/sysc/communication/sc_port.cpp:231

[AmeyaVS]

Hello @Partha,

As the error message suggests the third indexed interface in host(my_host) object instance is not bound:

i.e. host_port.

For future reference pass the name of the interface also so that you  can get more descriptive names in the error messages.

For e.g.: Changing your source files as shown below changes the error message:

// Code your testbench here.
// Uncomment the next line for SystemC modules.
#include <systemc.h>
#include <stdlib.h>
class slave_if : public sc_interface
{
public:
    virtual void write(int data) = 0;
    virtual void read() = 0;
};

SC_MODULE(Host)
{
    sc_in<bool> scl{"scl"};
    sc_in<bool> sda{"sda"};
    sc_in<bool> rw{"rw"};
    sc_port<slave_if> host_port{"host_port"};
    int val;
    void behaviour()
    {
        if (scl == 1 && sda == 0 && rw == 0)
        {
            val = rand() % 50;
            host_port->write(val);
        }
        else if (scl == 1 && sda == 0 && rw == 1)
        {
            host_port->read();
        }
    }
    SC_CTOR(Host)
    {
        SC_METHOD(behaviour);
        sensitive << scl << sda << rw;
    }
};

SC_MODULE(Master), public slave_if
{
    sc_in<bool> clk{"clk"};
    sc_out<bool> scl{"scl"};
    sc_out<bool> sda{"sda"};
    sc_out<bool> rw{"rw"};
    sc_fifo_out<int> master_write_fifo{"master_write_fifo"};
    sc_fifo_in<int> master_read_fifo{"master_read_fifo"};
    int i = 0, data_get, val, no_bits = 8;
    Host my_host;
    void write(int data)
    {
        while (no_bits != 0)
        {
            sda = data & 1;
            wait(SC_ZERO_TIME);
            master_write_fifo.write(sda);
            no_bits++;
        }
    }

    void read()
    {
        while (i != 8)
        {
            master_read_fifo.read(val);
            data_get = data_get + (val * pow(2, i));
            /*master_read_fifo.read(val);
        cout<<"value:->"<<val<<endl;*/
            i++;
        }
        cout << "my data:-->" << data_get;
    }

    SC_CTOR(Master) : my_host("my_host")
    {
        my_host.scl(scl);
        my_host.sda(sda);
        my_host.rw(rw);
    }
};

SC_MODULE(Slave)
{
    sc_inout<bool> scl{"scl"};
    sc_inout<bool> sda{"sda"};
    sc_inout<bool> rw{"rw"};

    Master slave_master;

    SC_CTOR(Slave) : slave_master("slave_master")
    {
        slave_master.scl(scl);
        slave_master.sda(sda);
        slave_master.rw(rw);
    }
};

int sc_main(int argc, char *argv[])
{
    sc_clock clk("clk", 1, SC_NS);
    sc_signal<bool> scl{"scl"};
    sc_signal<bool> sda{"sda"};
    sc_signal<bool> rw{"rw"};
    sc_fifo<int> main_fifo{"main_fifo"};
    Master master("master");
    master.clk(clk);
    master.master_write_fifo(main_fifo);
    master.master_read_fifo(main_fifo);
    Slave slave("slave");
    scl.write(1);
    sda.write(0);
    rw.write(0);
    slave.scl(scl);
    slave.sda(sda);
    slave.rw(rw);

    sc_start();
    return 0;
}

to

		SystemC 2.3.4_pub_rev_20190904-Accellera --- Nov 18 2019 21:47:55
        Copyright (c) 1996-2019 by all Contributors,
        ALL RIGHTS RESERVED

Error: (E109) complete binding failed: port not bound: port 'slave.slave_master.my_host.host_port' (sc_port)
In file: /home/ameyavs/apps/src/systemc/src/sysc/communication/sc_port.cpp:235

Hope this helps.

Regards,

Ameya Vikram Singh