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SDF Delay Annotation

SDF (Standard Delay Format) is a text format for storing time delays across elements of a (digital) circuit. The collection of these delays then represents the timing of the circuit. SDF is primarily an interchange format to communicate circuit timing among EDA tools, with STA tools being the typical producers and (digital) simulators being the typical consumers.

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Tolerate Glitches on Bus Transitioning between Stable States

This example shows how to use Verilog inertial delay modeling to avoid dynamic hazards on a bus changing from one stable state to another, such as when caused by differences in delays of individual bits.

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LFSR based implementation of CRC-8-CCITT

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API Doc Generators for Python Code

• https://wiki.python.org/moin/DocumentationTools
• https://pdoc3.github.io/pdoc/doc/pdoc/#pdoc&gsc.tab=0
• https://github.com/PyCQA/pydocstyle - pydoc style checker
• testing examples
  • https://github.com/pdoc3/pdoc/blob/master/pdoc/test/example_pkg/__init__.py

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SystemVerilog: Display eventual observed bus value

Problem: For a bus, ignore delta cycle changes and report only the eventual value at the and of the current time (slot).

`timescale 1ns/1ps

module tb;

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References to Titles/Headings in reStructuredText (RST)

In RST, one can easily refer to a title/heading (or more generally to a section start, which the heading really is) by using its text as a reference. For example:

... some text and then reference to `My Heading`_ ...

My Heading
~~~~~~~~~~

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Python Prductivity Tips

UML Class Diagrams

Pyreverse (part of Pylint):

• natively supports .dot (GraphViz), UMLet and PlantUML outputs
• useful options

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Distributing total into evenly sized integers

A snippet showing how to distribute even integral weights (e.g. percantage).

from random import randrange

def distribute(n,total=100):

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Customizing reStructuredText (rst) for Domain-specific Syntax

• document tree
  • created by a Parser component (i.e. from reStructuredText input)
  • manually constructed
• docutils components

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OpenSTA

OpenSTA is an open-source STA tool by Parallax (hence a.k.a. Parallax STA/Static Timing Analyzer). User Manual is part of the repository.

Build