SystemC Simulation Tutorial:
Design of a 1-bit Adder and a 4-bit Adder

I. Procedure

Setting up SystemC

1. Start Microsoft Visual C++ 6.0
2. Create a Project Workspace:
1. Click on "File", then "New", select "Projects", then click on "Win32 Console Application".
2. In the "Location" box, click on the down arrow, then on "Drives", and choose "h:\\some_server_name\cs1Xxx" , then click "OK" (some_server_name will have some name there (it changes periodically)) (csXxx is your login). You should not actually be typing anything here, just click.
3. For the "Project Name", We will use "lab1a" as the example.
4. Type "OK".
5. Choose "An empty project" and click "Finish". Then click "OK".
3. You can now see a folder named "lab1a classes" in the workspace window. (Left part of screen)
4. Port SystemC libraries to Microsoft Visual C++ 6.0:
1. Click on “Project”, then “Settings”, then select the C/C++ tab, and then finally select the “C++ Language” category. Make sure that the “Enable Run Time Type Information (RTTI)” checkbox is checked.

2. Also make sure that the SystemC header files are included by  switching to the “Preprocessor” on the C/C++ tab and then typing “C:\SystemC\systemc-2.0.1\src” in the text entry field labeled “Additional include directories”.

3. Next click on the “Link” tab, and make sure the SystemC library is included to your project by typing “C:\SystemC\systemc-2.0.1\msvc60\systemc\Debug” in the text entry field labeled “Additional library path”.

4. Add the SystemC object files by first clicking on “Project”, then “Add to Project”, then “Files”. In the File Browser navigate to the “C:\SystemC\systemc-2.0.1\msvc60\systemc\Debug” directory. In the text entry field labeled “File Name” type “*.obj” and press enter. Click on the file “sc_attribute.obj” and then simultaneously press the “Ctrl” & “A” keys (CTRL+A). Click the OK button to add the files.

5. In your workspace window under the “File View” Tab, you should see a number of object files with the “sc_” prefix such as sc_attribute.obj, sc_bit.obj, etc. Find the file “sc_isdb_trace.obj”, click that file name, and press “delete” on your keyboard.

1. After creating  a new project by following the steps above, Click on "File", then "New",  then click on "C++ Source File" under the "Files" tab.
2. Make Sure the "Add to Project" box is checked. In the "Filename" box, type in the file's name.
   To keep things simple,  name your file "add1", the .cpp extension is automatically added.
3. Enter the following is the SystemC code for the 1-bit adder. Enter the code as seen below into the empty file. NOTE: All lines that start with "//" are not needed. These are comments to help you better understand what the actual code is doing.

            // Simulation Tutorial
         // 1-bit Adder
   
         // This is to include the SystemC constructs and objects.
         #include "systemc.h"

         // We declare the 1-bit ADDER as a "SC_MODULE" with the input and
         // output ports declared immediately after the module declarations
         // This will add two bits together(a,b), with a carry in(cin) and
         // output the sum(sum) and a carry out(cout).
         SC_MODULE (BIT_ADDER)
         {
         	sc_in<sc_logic> a,b,cin;
           sc_out<sc_logic> sum,cout;
   	//In the constructor block of the module, declare a method called "process"
           //with a sensitivity list that includes a, b, & cin.
   	SC_CTOR (BIT_ADDER)
   	{
   	     SC_METHOD (process);
        	     sensitive << a << b << cin;
          	}  
   
         	//Define the functionality for the "process" method in the 1-BIT adder
   	void process()
           {
                //Declare variables of type "logic" to be used in calculations
   	     sc_logic aANDb,aXORb,cinANDaXORb;
   	
         	     //Perform intermediate calculations for the 1-BIT adder
   	     //Note to read input from a port, one must use the format: "port_name.read()"
         	     aANDb = a.read() & b.read();
                aXORb = a.read() ^ b.read();
         	     cinANDaXORb = cin.read() & aXORb;
   
                //Calculate sum and carry out of the 1-BIT adder
                sum = aXORb ^ cin.read();
                cout = aANDb | cinANDaXORb;
            }
   
          };   //Don't forget the semicolon!