---

Contents

---

1

Introducing the Open Simulation System (OSS)

OSS Components Overview

Simulator Integration Overview

Designer and Developer Perspectives

64-bit OSS

2

Integrating Simulators

Requirements

SKILL

Database Access Functions (SKILL Database Access)

Running Simulation Using SE

Creating Stimuli Using STL

Developing a Simulator Interface

Simulation Steps

Generating Stimuli

Generating a Netlist

Translating Stimuli Names

Running the Simulator

Translating Names in Simulator Text Output

Creating Backannotation Error Messages

Integration Steps

3

Customizing the Simulation Environment (SE)

SE Goals

SE Steps

Run Directory Initialization

Netlisting

Simulation Input Translation

Running the Simulator

Simulation Output Translation

How SE Works

Files Needed To Integrate Your Simulator

Simulator-Specific SE Customization File

Template Control File

Name Translation File

SE Naming Conventions

SE Variables

simActions

simAlwaysAddPrefixInInstName

simCapUnit

simCellName

simCellViewModifiedAction

simCheckNetCollisionAction

simCleanFileList

simCommand

simCompleteMessage

simControlFile

simDefaultControl

simDefaultRunDir

simDefaultSimulator

simDetectPCellFailure

simDoNetlist

simDoNotForkNetlist

simFailedMessage

simGenWarnings

simHost

simHostDiffers

simIgnoreTerm

simResolveStopCellImplicitConns

simInitRunActions

simInstNamePrefix

simLibName

simMaxNetlistErrors

simModelNamePrefix

simNetlistHier

simNetNamePrefix

simNlpGlobalCellName

simNlpGlobalLibName

simNlpGlobalViewName

simNotIncremental

simPcellPrefix

simPinGlobals

simReNetlistAll

simViewName

simViewList

simRunDir

simRunningInSi

simSedFile

simSimulatorSaveVars

simSimulatorUnbindFuncs

simSimulatorUnbindVars

simStopList

simStopNetlistOnPcellFailure

simTimeUnit

simSimulator

simSupportDuplicatePorts

simSymbolModifiedAction

SE SKILL Functions

SE Graphics Variables

4

Customizing the Interactive Simulation Environment (ISE)

Understanding Interactive Simulation

Interactive and Batch Simulation

Creating an Interactive Interface

Using an Interactive Simulation Interface

Initializing the Interactive Environment

Creating Windows for Interactive Simulation

Running the Simulation

Ending the Session

Customizing ISE

ISE Interfacing Steps

Foreground Simulation Environment

Window Environment

Menu Commands

ISE Variables

ISE Functions

ISE Interfacing Steps

Foreground Simulation Environment

Window Environment

Menu Commands

Filtering Simulator Inputs and Outputs

Creating User Specified Window Placement

ISE Variables

iseDontOpenSchematicWindowIfOneExists

iseExitSimulator Command

iseFilterInputFunc

iseFilterOutputFunc

iseInitSchWindowFunc

iseInitSimWindowFunc

iiseInputNetlistCommand

iseInputStimulus Command

iseInvokeSimulatorFunc

iseOpenWindowsFunc

iseReleaseFunc

iseRunSimulator Command

iseSchematicMenu Handle

iseSetFunc

iseSimulateFunc

iseSimulatorMenuHandle

iseStartSimulatorFunc

iseSchWinAttrId

iseSimWinAttrId

ISE Functions

NFS-Mount Mode

Copy Mount Mode

Assigning the Path

Selecting the Mode

Copying the Simulation Files

OSS System Requirements

5

Customizing the Hierarchical Netlister (HNL)

How the Netlister Works

Introduction

Defaults Setup

Handling Designs with Instances of Different Place Masters Having the Same Switch Master

Property Inheritance Warning

Instance Ignore Conventions

Skipping Terminals

Output Formatting

Map File

Naming Conventions

Source Code

Support for Inherited Connections

Support for Supply Sensitivity

Ignoring Mismatch in Inherited Connections

Support for Iterated Instances

Writing a Formatter

Set Output Variables

Create Netlister Data Structures

Print Netlist Header

Print Connectivity for Subcircuits

Print Connectivity for Top Cells

Print Netlist Footer

Unbind Variables

Required Formatter Functions and Variables

Formatter-Specific Triggers that Customize the Netlist

HNL Specific Properties

HNL Variables

HNL Global Variables

HNL Access Functions

Incremental Hierarchical Netlisting

How IHNL Works

Terms You Need To Know

Name Mapping in IHNL

Netlist Module Names

Global Signals

Known Problems

Configuring an Incremental Netlist Formatter

Writing the HNL Formatter

Converting to an IHNL Formatter

Example

HNL Code To Change

IHNL Code To Add

Variables and Functions for Incremental Netlisting

Definable Variables

Variables IHNL Defines

6

Customizing the HNL Net-Based Netlister

Flow of Net-Based HNL

HNL Variables for Net-Based Netlisting

HNL Procedures for Net-Based Netlisting

Other Variables and Procedures

Controlling the Format of the Netlist File

Variable and Name Mapping Functions

Other Procedures and Functions

Other Variables

Procedures the Formatter Must Define

Designing an HNL Net-Based Formatter

Determine Name Mapping and Netlist Syntax Needed

Initialize Variables

Code the Needed Procedures

Net-Based Netlister Design Example

Designing the Netlister

The Formatter

Sample Output from Formatter Design

7

Customizing the Flat Netlister (FNL)

How FNL Works

Formatting Instructions

Database Traversal Routines

FNL Naming Conventions

FNL Flattening Process

Locating an Instance of a Device

Switching Views

Stopping Views

Opening a Design

Locating a Cellview

Expand or Format

Global Nets

Support of Multiplicity Factors for Flat Netlisters

FNL Name Map

FNL Output Formatting

Global Cellview (nlpglobals) Contents

Creating Predetermined Properties

Formatting Substitution Expressions

SKILL Formatting

Customizing FNL Output

Learn Required Information

Create Global Cellview

Create Library Elements

Write SKILL Formatting Procedures

Modify the Simulation Environment (SE)

FNL Format Example

FNL SKILL Functions

8

Customizing Post-Layout Simulation

Parasitics Extracted by the Layout Extractor

Parasitics Extracted by the Symbolic Layout Parameter Extraction Tool

Customization Steps

Variables

Functions

9

Generating a Library

Library Structure Overview

Data Organization

Library Directory Contents

Logical Name to Physical Path Name Mapping

Cell

Views

Version

Library Element Views

Symbol Views

Simulation Views

Subcircuit Primitive Views

Creating Your Own Library

Symbol Generation

View Generation

Library Maintenance

Library Update Procedures

Example of Updating a Cadence Sample Library

A

Support for HED

APIs Modified to Support these Features

Bind to Open

Handling of views without DFII-DB data by OSS

B

Troubleshooting: Bus Direction

Determining a Bus Direction

Resolving a Conflict in Bus Direction

Return to top