# SystemC netlister README

    TITLE:

         Gnetlist SystemC Backend

    OBJECTIVE:

         Transform a geda schematic into a transaction based structural systemc module.

    LIMITATIONS:

         1.- Only transaction based wires are considered (wire_name<user_type>).
         2.- Unnamed wires are eliminated.
         3.- In/out ports have to be inserted manually in the sysc code.
         4.- Duplicated include headers are not eliminated by the backend.
         5.- The maximum number of object constructor parameters is 31 (attr1->attr31).

    LINKS:

         GPL Electronic Design Automation (geda-gnetlist): http://www.geda.seul.org
         SystemC: http://www.systemc.org

    ACK:

         Based on gnet-verilog.scm by Mike Jarabek.

    EXAMPLE:

         Schematic:

         src1                         alg1                      snk1
         ______________               _______________           _______________
         | source     |  a<user_type> |  algorithm  |  b<float> |        sink |
         |         OUT|__ _________ __|IN        OUT|__ _____ __|IN           |
         |            |               |             |           |             |
         | infile.data|               |             |           | outfile.data|
         |____________|               |_____________|           |_____________|

         Attributes:

                Schematic:
                         module_name=test_sch2sysc

                Wires:
                         netname=a<user_type>
                         netname=b<float>
                Symbols:
                         refdes=src1 attr1=infile.data
                         refdes=alg1
                         refdes=snk1 attr1=outfile.data
                         refdes=pina
                         refdes=pinb

         SystemC:

    		#include "systemc.h"
    		#include "sink.h"
    		#include "source.h"
    		#include "algorithm.h"

    		SC_MODULE (test_sch2sysc)
    		{
    			/* Port directions begin here */

    		 	/* Wires from the design */
    			sc_signal<float> b;
    			sc_signal<packet_type> a;

    			/* Package instantiations */
    			sink snk1;
    			source src1;
    			algorithm alg1;

    			SC_CTOR(test_sch2sysc):
    				snk1("snk1","outfile.data"),
    				src1("src1","infile.data"),
    				alg1("alg1")
    			{
    				snk1.IN(b);
    			  	src1.OUT(a);
    			  	alg1.IN(a);
    			  	alg1.OUT(b);
    			}
    		};