错误：(E109)完成绑定失败:未绑定端口- SystemC

Question

我正在尝试在SystemC中设计一个LFSR计数器，它应该看起来像这样：(click to see picture)

我已经写了我的代码，但我认为lfsr.h文件中的模块shiftreg.h和lfsr-feedback.h之间的连接有问题，但我找不出问题所在。

我在终端上运行时收到以下错误消息：

Error: (E109) complete binding failed: port not bound: port 'top_p.LFSR_p.shiftReg_p.port_3' (sc_in)
In file: ../../../../src/sysc/communication/sc_port.cpp:231

main.cpp文件如下所示：

#include <iostream>
#include "systemc.h"
#include "lfsr.h"
#include "stim_shiftReg.h"

SC_MODULE(TOP)
{
    LFSR          *LFSR_p;
    stim_shiftReg *stim_shiftReg_p;

    sc_clock               sig_clk;  //define clock pin

    sc_signal< bool >      sig_rst;
    sc_signal< bool >      sig_lshift;
    sc_signal< sc_bv<8> >  sig_out;

    SC_CTOR(TOP) : sig_clk ("ClockSignal", 20, SC_NS)
    {
        stim_shiftReg_p = new stim_shiftReg("stim_shiftReg_p");
        stim_shiftReg_p -> clk(sig_clk);          //input bool
        stim_shiftReg_p -> rst(sig_rst);          //input bool
        stim_shiftReg_p -> stim_lshift(sig_lshift);    //input bool
        stim_shiftReg_p -> stim_out(sig_out);          //output sc_bv

        LFSR_p = new LFSR("LFSR_p");
        LFSR_p -> clk(sig_clk);           //input bool
        LFSR_p -> rst(sig_rst);           //input bool
        LFSR_p -> lshift(sig_lshift);
        LFSR_p -> out(sig_out);           //output sc_bv

    }
    ~TOP(){
        //free up memory
        delete LFSR_p;
        delete stim_shiftReg_p;
    }
};

TOP *top_p = NULL;

int sc_main(int argc, char* argv[])
{
    sc_set_time_resolution(1, SC_NS);
    top_p = new TOP("top_p");
    sc_start();
    return 0;
}

这是lfsr.h文件的外观：

#include"systemc.h"
#include"shiftReg.h"
#include"lfsr_feedback.h"

SC_MODULE(LFSR)
{
    shiftReg      *shiftReg_p;
    lfsr_feedback *lfsr_feedback_p;

       //define input
       sc_in<bool> clk;
       sc_in<bool> rst;
       sc_in<bool> lshift;

       //define output
       sc_out<sc_bv<8> > out;

       sc_signal<bool> rightin;

    SC_CTOR(LFSR)
    {
        shiftReg_p = new shiftReg("shiftReg_p");
        shiftReg_p -> clk(clk);                //input bool
        shiftReg_p -> rst(rst);                //input bool
        shiftReg_p -> lshift(lshift);     //enable shift signal connection
        shiftReg_p -> out(out);        //output sc_bv

        lfsr_feedback_p = new lfsr_feedback("lfsr_feedback_p");
        lfsr_feedback_p -> clk(clk);                  //input bool
        lfsr_feedback_p -> rst(rst);                  //input bool
        lfsr_feedback_p -> rightin(rightin);          //feedback signal
        lfsr_feedback_p -> out(out);                  //output sc_bv
    }
    ~LFSR()
    {
        //free up memory
        delete shiftReg_p;
        delete lfsr_feedback_p;
    }
};

这是shiftReg.h

#include<iostream>
#include<systemc.h>
SC_MODULE(shiftReg) //'shiftReg' - Module name
{

   //define input
   sc_in<bool> clk;
   sc_in<bool> rst;
   sc_in<bool> lshift;
   sc_in<bool> rightin;

   //define output
   sc_out<sc_bv<8> > out;

   sc_bv<8> RegValue;

   SC_CTOR(shiftReg) //'shiftReg' - Module name
   {
     SC_CTHREAD(ShiftReg, clk.pos());
     async_reset_signal_is(rst, true);
   }

   private:
   void ShiftReg()
   {
       //Reset actions
       RegValue = (11111111); //Use RegValue to store the register value
       wait();
       std::cout << "Reset done! RegisterValue = " << RegValue << endl;
       wait();

       while(true)
       {
           if(lshift.read() == true)
           {
               RegValue = RegValue << 1; //shift to the left
               RegValue[0] = rightin.read();
               std::cout << "Left shift done! RegisterValue = " << RegValue << endl;
           }
           else //if both are set to FALSE, no action should happen
           {
               std::cout << "'lshift' is set to FALSE status. No shift is done!" << endl;
           }
           out.write(RegValue); //Write output value to the out port
           wait();
       }
   };
};

这是lfsr_feedback.h

#include<iostream>
#include<systemc.h>
SC_MODULE(lfsr_feedback) //'lfsr_feedback' - Module name
{
   sc_in< bool > clk;
   sc_in< bool > rst;
   sc_out< bool > rightin;
   sc_in< sc_bv<8> > out;

   sc_signal<bool> fb_xor, a, b, c, d;

   SC_CTOR(lfsr_feedback)    //'lfsr_feedback' - Module name
   {
     SC_CTHREAD(Feedaback_Gen, clk.pos());
     async_reset_signal_is(rst, true);
   }

   private: void Feedaback_Gen()
   {
       wait();
       while(true)
       {
           a = out[7]; b = out[5]; c = out[4]; d = out[3];
           std::cout << "Load random bits" << endl;

           fb_xor =  (a ^ b) ^ (c ^ d);
           std::cout << "Calculate xor value!" << rightin << endl;

           rightin.write(fb_xor);
           wait();
       }
   };
};

这是stim_shiftReg.h

#include "systemc.h"

SC_MODULE(stim_shiftReg) 
{
    //define stimuli input for shift register
    sc_in<bool> clk;
    sc_out<bool> rst;
    sc_out<bool> stim_lshift;

    //define stimuli output for shift register
    sc_in<sc_bv<8> > stim_out;

    SC_CTOR(stim_shiftReg) {   //'stim_shiftReg' module name
      SC_CTHREAD(Stim_Shift, clk.pos());
    }

    private:
    void Stim_Shift() {
        //Simulate reset signal
        wait();
        rst.write(true);
        wait();
        rst.write(false);

        //Write input value for 'in'
        stim_lshift.write(true);  //enable shifting
        wait(40000);

        sc_stop();
    };
};

注意:我不确定lfsr.h中的out端口。它是来自shiftReg.h的sc_out<T>，也是LFSR.h的输出。但是相同的端口应该是lfsr_feedback.h的输入。

非常感谢!

Answer 1

1)很可能是您忘记了绑定LFSR模块实例的"out“端口

2)你应该总是用名字初始化所有的sc_objects，这样你就可以得到可读的错误。例如，在C++11中，您可以就地初始化成员

//define input
sc_in<bool> clk{"clk"};
sc_in<bool> rst{"rst"};
sc_in<bool> lshift{"lshift"};
//define output
sc_out<sc_bv<8> > out{"out"};

Answer 2

顶级模块中未绑定端口"lshift“。查看我的内联评论：

#include <iostream>
#include "systemc.h"
#include "lfsr.h"
#include "stim_shiftReg.h"

SC_MODULE(TOP)
{
  LFSR          *LFSR_p;
  stim_shiftReg *stim_shiftReg_p;

  sc_clock               sig_clk;  //define clock pin

  sc_signal< bool >      sig_rst;
  sc_signal< bool >      sig_lshift;
  sc_signal< sc_bv<8> >  sig_out;

  SC_CTOR(TOP) : sig_clk ("ClockSignal", 20, SC_NS)
  {
    stim_shiftReg_p = new stim_shiftReg("stim_shiftReg_p");
    stim_shiftReg_p -> clk(sig_clk);          //input bool
    stim_shiftReg_p -> rst(sig_rst);          //input bool
    stim_shiftReg_p -> stim_lshift(sig_lshift);    //input bool
    stim_shiftReg_p -> stim_out(sig_out);          //output sc_bv

    LFSR_p = new LFSR("LFSR_p");
    LFSR_p -> clk(sig_clk);           //input bool
    LFSR_p -> rst(sig_rst);           //input bool
    LFSR_p -> out(sig_out);           //output sc_bv
    LFSR_p -> lshift(sig_lshift);     //< The missing lshift port bind.
  }
  ~TOP(){
    //free up memory
    delete LFSR_p;
    delete stim_shiftReg_p;
  }
};

TOP *top_p = NULL;

int sc_main(int argc, char* argv[])
{
  sc_set_time_resolution(1, SC_NS);
  top_p = new TOP("top_p");
  sc_start();
  return 0;
}

更新：您仍然可以使用初始值设定项list方法来调用SystemC对象的构造函数。

从您的代码示例中：

SC_MODULE(LFSR)
{
  shiftReg      *shiftReg_p;
  lfsr_feedback *lfsr_feedback_p;

  //define input
  sc_in<bool> clk;
  sc_in<bool> rst;
  sc_in<bool> lshift;

  //define output
  sc_out<sc_bv<8> > out;

  sc_signal<bool> rightin;

  SC_CTOR(LFSR):
    clk("clk")    //<< Added these lines
    , rst("rst")  //<< Added these lines
    , lshift("lshift")  //<< Added these lines
    , out("out")  //<< Added these lines
    , rightin("rightin")  //<< Added these lines
  {

这些更改将使错误消息更有意义，而不仅仅是打印未绑定的port_3。

更新2:

模块中rightin中的端口在模块中未绑定: LFSR (在lfsr.h中)

SC_CTOR(LFSR)
{
    shiftReg_p = new shiftReg("shiftReg_p");
    shiftReg_p -> clk(clk);                //input bool
    shiftReg_p -> rst(rst);                //input bool
    shiftReg_p -> lshift(lshift);     //enable shift signal connection
    shiftReg_p -> out(out);        //output sc_bv
    shiftReg_p -> rightin(rightin); //< Missing statement.

    lfsr_feedback_p = new lfsr_feedback("lfsr_feedback_p");
    lfsr_feedback_p -> clk(clk);                  //input bool
    lfsr_feedback_p -> rst(rst);                  //input bool
    lfsr_feedback_p -> rightin(rightin);          //feedback signal
    lfsr_feedback_p -> out(out);                  //output sc_bv
}

注意：请遵循上一次更新中提到的更改，以便获得比未绑定"port_3“更有意义的错误消息。

Answer 3

处理不太有用的消息的一种方法：

Error: (E109) complete binding failed: port not bound: port 'top_p.LFSR_p.shiftReg_p.port_3' (sc_in)

是在定义模块端口的头文件上使用egrep (此处猜测)：

egrep "sc_in|sc_out" shiftReg_p.h

然后，您将看到按数字顺序排列的sc_in和sc_out的列表，然后就可以知道哪个是port_3