stack systemc model ( seek support in error handling )

[ankit]

1) I followed following steps to execute and to debug but could not see use of debugger

a) g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux -o out stack_class.cpp -lsystemc -lm

gdb out

c) b sc_main

d) run ------failed to see step-by-step output

 

2) if in switch i interchange wait and notify statement it give incorrect output. I wish to know how scheduler is working

 

3) i have used most of C++ as when i used more of systemC constructs such as ( read, write, sc_in, sc_out ) it leads to numerous error.

 

4) seek guidance to implement stack code in systemc in whatsoever best possible optimized manner

#include "systemc.h"
#include "iostream"
using namespace std;

SC_MODULE (stack_1)
{
sc_event e1,e2;
sc_int<10> ch,num,top,space_left;
sc_int<10> a[5];
 

SC_CTOR(stack_1)
{
	top=0;
	SC_METHOD(read_1);
	sensitive<<e1;
	dont_initialize();

	SC_METHOD(write_1);
	sensitive<<e2;
	dont_initialize();

	SC_THREAD(sync);

}
	void sync()
	{
		cout<<"\n***** MY STACK CODE *****";
	do
	{
		cout<<"\nInput READ(0) or write(1)";
		cin>>ch;
		switch(ch)
		{
			case 1:
				e2.notify();
				wait(5,SC_SEC);
				cout<<"\n@"<<sc_time_stamp();
				break;d
			case 0:
				e1.notify();
				wait(5,SC_SEC);
				cout<<"\n@"<<sc_time_stamp();
				break;
			default:
				cout<<"bad choice";
				break;
		}
	
	}while(ch==0 || ch==1);
	}
	void read_1()
	{
		if(top==0)
		{
			cout<<"\nStack Underflow--cannot read";
		}
		else
		{       top --;
			cout<<"\nRead element is:";
			cout<<a[top];
		}
	}
	void write_1()
	{
		if(top==5)
		{
			cout<<"\nStack Overflow--cannot write";
		}
		else
		{
			cout<<"\nenter element to write:";
			cin>>num;
			a[top++]=num;
		}
	}
	
};

int sc_main(int argc,char* argv[])
{
	
	stack_1 s("s");
	sc_start(100,SC_SEC);
	
return (0);
}

	
	












					

[dakupoto]

 

1) I followed following steps to execute and to debug but could not see use of debugger

a) g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux -o out stack_class.cpp -lsystemc -lm

gdb out

c) b sc_main

d) run ------failed to see step-by-step output

 

2) if in switch i interchange wait and notify statement it give incorrect output. I wish to know how scheduler is working

 

3) i have used most of C++ as when i used more of systemC constructs such as ( read, write, sc_in, sc_out ) it leads to numerous error.

 

4) seek guidance to implement stack code in systemc in whatsoever best possible optimized manner

#include "systemc.h"
#include "iostream"
using namespace std;

SC_MODULE (stack_1)
{
sc_event e1,e2;
sc_int<10> ch,num,top,space_left;
sc_int<10> a[5];
 

SC_CTOR(stack_1)
{
	top=0;
	SC_METHOD(read_1);
	sensitive<<e1;
	dont_initialize();

	SC_METHOD(write_1);
	sensitive<<e2;
	dont_initialize();

	SC_THREAD(sync);

}
	void sync()
	{
		cout<<"\n***** MY STACK CODE *****";
	do
	{
		cout<<"\nInput READ(0) or write(1)";
		cin>>ch;
		switch(ch)
		{
			case 1:
				e2.notify();
				wait(5,SC_SEC);
				cout<<"\n@"<<sc_time_stamp();
				break;d
			case 0:
				e1.notify();
				wait(5,SC_SEC);
				cout<<"\n@"<<sc_time_stamp();
				break;
			default:
				cout<<"bad choice";
				break;
		}
	
	}while(ch==0 || ch==1);
	}
	void read_1()
	{
		if(top==0)
		{
			cout<<"\nStack Underflow--cannot read";
		}
		else
		{       top --;
			cout<<"\nRead element is:";
			cout<<a[top];
		}
	}
	void write_1()
	{
		if(top==5)
		{
			cout<<"\nStack Overflow--cannot write";
		}
		else
		{
			cout<<"\nenter element to write:";
			cin>>num;
			a[top++]=num;
		}
	}
	
};

int sc_main(int argc,char* argv[])
{
	
	stack_1 s("s");
	sc_start(100,SC_SEC);
	
return (0);
}

	
	












					

 

Hello Sir,

A statck is a LIFO -- Last In First Out. For starters, implement this in

simple C/C++ -- that is NO SystemC. Run it and verify that it works

correctly -- add elements - remove some and verify that the Last In

First Out order is maintained.

A simple stack can be implemented as an array. The last element

added is removed first -- adding an element increments the array

index, and removing an element decrements it. Ensure array

bound checking at each addition/removal. Try this out in plain C.

When you have got it working just right, translate it to SystemC.

However, SystemC does not offer any built in stack.

Hope that helps.

[David Black]

In your compilation (step 1a) you forgot to add the -g option to get debugging information into the resulting executable.

 

% g++ -ggdb -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux -o out stack_class.cpp -lsystemc -lm