Re: EDIF input to Xilinx ISE

The & is used to allow identifiers to begin with an _ or a number. Make sure
your files are purely structural. EDIF2NGD only supports EDIF 2.0.0. What's
worse: the error messages can be off by thousands of lines either direction.
What's worse than that: the memory efficiency of the tool is terrible. As
far as a "conversion tool" is concerned, get the parser from www.edif.org
for the 2.0.0 files. Run your code in and out of there. The pretty printed
version from that should work better. I have plenty of EDIF files that will
work with the EDIF2NGD tool Xilinx ships. Here's an example:

(edif Test
 (edifVersion 2 0 0)
(edifLevel 0)(keywordMap (keywordLevel 0))(status(written
(timeStamp 2003 5 20 15 25 35)(author "SBS")(program "SBS" (version
"Whoopee"))))
(library Test (edifLevel 0) (technology (numberDefinition ))
(cell GND (cellType GENERIC)
 (view net (viewType NETLIST)
  (interface
   (port G (direction OUTPUT))
   (property  LEVEL (string "XILINX"))(property  LIBVER (string "2.0.0"))
  )
 )
)

(cell VCC (cellType GENERIC)
 (view net (viewType NETLIST)
  (interface
   (port P (direction OUTPUT))
   (property  LEVEL (string "XILINX"))(property  LIBVER (string "2.0.0"))
  )
 )
)

(cell OR2 (cellType GENERIC)
 (view net (viewType NETLIST)
  (interface
   (port I0 (direction INPUT))
   (port I1 (direction INPUT))
   (port O (direction OUTPUT))
   (property  LEVEL (string "XILINX"))(property  LIBVER (string "2.0.0"))
  )
 )
)
(cell someOr (cellType GENERIC)
 (view net (viewType NETLIST)
  (interface
   (port In1 (direction INPUT))
   (port In2 (direction INPUT))
   (port Out1 (direction OUTPUT))
  )
  (contents
   (instance I234OR2 (viewRef net (cellRef OR2)))
   (net N1727(joined(portref O(instanceRef I234OR2) ) (portRef Out1)))
   (net N1728(joined(portref In1 ) (portRef I0(instanceRef I234OR2))))
   (net N1729(joined(portref In2 ) (portRef I1(instanceRef I234OR2))))
  )
 )
)
)  (design Test (cellRef someOr (libraryRef Test))(property PART(string
"xc2v6000ff1152-4") (owner "Xilinx"))))



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