Verilog-to-physical conversion scripts
This package accepts a Verilog file and collateral headers and generates an internal physical representation of the design, which it translates to a LEF, LIB, and GDS view.
Relevant scripts live in the scripts directory.
To generate the SRAM views, run generate_srams.py. This finds all SRAM types
defined in the behavioral model and performs the physical view generation for each one.
To modify the parameters in the generation, the relevant object classes are in gen_srams.py
This file contains three class structures, SRAMBBox, ASAP7Characterizer and ASAP7SRAMs.
This class represents the per-instance physical representation for each SRAM instance. Methods for determining design width and aspect ratio, as well as options for the view generation itself live here and are shared across all SRAM instances. If you need custom settings for a particular SRAM instance, this can be subclassed for those cases.
The _get_xwidth_from_* methods are the most arbitrary here, where I just picked some scale factor
for the xwidth based on the word length and address width of the SRAM. This will directly affect
the SRAM dimensions, so these should probably be the first methods to be modified for tweaking SRAM
generation.
This is a characterizer for the dotlibber when generating LIBs for the SRAMs. The characterizer formulas are completely arbitrary and were the result of me doing a very rough manual curve fit to sort of emulate the characteristics of another SRAM lib, with scaling from technology.
This is a container object for all the SRAMs generated from the behavioral file. This class just contains
wrapper methods for creating the SRAMBBox instances and abstracts the behavioral file scraping to a few
"make/build objs" APIs. This is just to streamline the script in generate_srams.py.