Chapter 10 -- SystemC From Gound 读书心得

1. Design Hierarchy



2. How to creat hierarchy

1) Direct/indirect Top-Level Implementation

//=================direct===================

//FILE: main.cpp
#include <systemc>
#include "Car.h"
int sc_main(int argc, char* argv[]) {
Car car_i("car_i");
sc_start();
return 0;
}

//=================indirect===================

//FILE: main.cpp
#include <systemc>
#include "Car.h"
int sc_main(int argc, char* argv[]) {
Car* car_iptr; // pointer to Car
car_iptr = new Car("car_i"); // create Car
sc_start();
delete car_iptr;
return 0;
}

2) direct submodule

//FILE:Car.h
#include "Body.h"
#include "Engine.h"
SC_MODULE(Car) {
Body body_i;
Engine eng_i;
Car(sc_module_name nm);
};

//FILE:Car.cpp
#include <systemc>
#include "Car.h"
// Constructor
SC_HAS_PROCESS(Car);
Car::Car(sc_module_name nm)
: sc_module(nm)
, body_i("body_i")
, eng_i("eng_i")
{
// other initialization
}

3) indirect submodule -- For IP deliver

//FILE:Engine.h
class FuelMix;
class Exhaust;
class Cylinder;
SC_MODULE(Engine) {
FuelMix* fuelmix_iptr;
Exhaust* exhaust_iptr;
Cylinder* cyl1_iptr;
Cylinder* cyl2_iptr;
Engine(sc_module_name nm); // Constructor
};

//FILE: Engine.cpp
#include <systemc>
#include "FuelMix.h"
#include "Exhaust.h"
#include "Cylinder.h"
// Constructor
SC_HAS_PROCESS(Engine);
Engine::Engine(sc_module_name nm)
: sc_module(nm)
{
fuelmix_iptr = new FuelMix("fuelmix_i");
exhaust_iptr = new Exhaust("exhaust_i");
cyl1_iptr = new Cylinder("cyl1_i");
cyl2_iptr = new Cylinder("cyl2_i");
// other initialization
}

注意上例中 Engine.h 没有包括 #include "FuelMix.h", etc..., 而是移到了Engine.cpp中。这就是最大的好处，你只需要提供Engine.h 和 Engine.o 或者 Engine.a就行了，而且 .o, .a都可以方便的更新。