WGL：Waveform Generation Language（附笔记）

Languages, Vol. II, R11.0 2-1

Fluence Technology, Inc.

Chapter 2

Waveform Generation Language

2.1 Introduction

The Waveform Generation Language (WGL) is a data description language. It

is used to convey an editable ASCII representation of the data contained in a

Waveform DataBase (WDB), allowing you to use your system’s text editor to

fully customize the database.

Use WGL to:

■ Transfer a WDB from one host platform type to another type. WDBs are

not otherwise portable.

■ View and edit the ATE-specific portions of the WDB. Such portions of the

WDB are not accessible by WaveMaker’s editors.

■ Create a WDB solely from WGL. This permits users who have a TDS

WaveBridge module, but do not have WaveMaker, to run WaveBridge with

a WDB.

■ Use binary pattern data from the CAE simulation as input to TDS. (For

more information, see Binary WGL on page 2-102.)

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and WGL Out Converter modules. For details on how to use the WGL In

Converter and the WGL Out Converter, see Chapter 15 in the In Converters

Guide and Chapter 16 in the Out Converters Guide.

2.3 WGL and Wavemaker

Since WGL describes a WDB, the language necessarily reflects the structure

of the WDB. If you have used the WaveMaker editors to view a WDB, you will

recognize this similarity. Many of the entities (such as ATE Pin and DUT Pin

fields) that are visible in WaveMaker’s editors are easily identifiable in WGL.

Some WGL structures, however, are associated with ATE-specific descriptions,

and are not visible in the WaveMaker Editors. The WGL Formats program

area in which the signal name or names are entered.

Figure 2-1 shows the Timing Editor’s view of a TimePlate named Fetch. Note

the TimePlate name, the signal names, the signal directions, and the

waveform tracks; all of these entities can be described using WGL. Timing

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The corresponding WGL description of the TimePlate Fetch is shown in the

following example. Note how the TimePlate name, the signal name, direction,

waveform track, and channel correspond to the same entities shown in the

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2.4 WGL Language Conventions

A WGL program is an ASCII text version of the information in the WDB.

The

language is free-form (multiple white spaces are treated as a single white

space and line returns are ignored) and limited to a line length of 512

languages.

In describing the syntax of WGL, the following variation of the Backus-Naur

Formalism (BNF) is used:

■ Two colons followed by an equivalence sign ( ::= ) denote a syntactic

category to syntactic rules relationship.

■ Double quotation marks ( “ ” ) or Bold typeface denote the literal use of a

reserved word, typographical symbol, or parameter. If double quotation

marks are to be used literally, they are enclosed within single quotation

marks ( ‘ ’ ).

syntax. (This notation implies that the enclosed syntax is optional, since

zero repetitions of a syntax is optional usage.)

■ A vertical bar ( | ) denotes separate choices of syntax.

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2—Waveform Generation Language WGL Language Conventions

User-defined identifiers, such as <TDSstate>, are defined in the Glossary of

WGL Terminology on page 2-134.

Do not confuse the BNF use of such typographical symbols as braces

)

of the action enclosed within the braces, while WGL uses braces to mark

database annotations.

As in other programming languages, you can add explanatory comments to a