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-project.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);
			}
		};

