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5.2.1 : How to import a Synopsys submodule into a Viewlogic Schematic


Record #2450

Problem Title:
5.2.1 : How to import a Synopsys submodule into a Viewlogic Schematic


Problem Description:
Keywords: Viewlogic, Synopsys, module, import

Urgency: Standard

Design Compiler created design in a Viewlogic schematic?


Solution 1:

In order to import a Synopsys design into a Viewlogic
schematic, the XACT 5.2.1 core tools (DS502) as well as the
Xilinx Synopsys Interface (DS401) and the Viewlogic Interface
(DS391) needs to be installed on the system and the environment
needs to be properly setup to run these tools.

Note:  Where referenced, replace <module> with the name of the
       top level design of the Synopsys created module.

1.  Add/modify the following lines in your .synopsys_dc.setup
    file:

    bus_naming_style = "%s%d"
    bus_dimension_separator_style = ""
    bus_inference_style = "%s%d"

    This needs to be performed so that the bus index naming is
    compatible with the Viewlogic bus naming style.

2.  Compile the design in Synopsys ommitting the
    set_port_is_pad and insert_pads steps of implementation to
    avoid the inferrence of pads and buffers in the module.
    Create a .sxnf (FPGA Compiler) or .sedif (Design Compiler)
    file.

3.  Run syn2xnf -s <module>.  The final output file will
    be <module>.xff.  The -s switch (sub-module) will omit the
    EXT records from the produced .xff file so that the design
    may be instantiated as a module.  Open the .xff file with a
    text viewer and verify that the file does not contain lines
    that begin with EXT to ensure this step was executed
    properly.

4.  Rename the <module>.xff file to <module>.xnf and copy the
    file to your Viewlogic project directory.

5.  From Viewlogic, create a symbol with the appropraite
    connecting pins.  Be sure to specify the Property BlockType
    of the symbol as a module rather than a composite
    (default).	It is usally best to name the symbol the same
    name as the <module> created in Synopsys although this is
    not required.

6.  Place the symbol into the top level Viewlogic schematic.

7.  Add the following attribute to the newly created symbol:
    file=<module>.xnf

8.  Connect the symbol to your schematic and complete the
    design.

9.  Implement the design as normal Viewlogic project.  If
    design changes need to be made to the Synopsys module,
    simply perform steps 2 through 4 again.



End of Record #2450