User`s guide

DC 900-1516D 35

Chapter

Programming Using the

DLITE Embedded Interface

Tec hp ub s —

Terminology

Cautions: 1)

use blocking

and non-

blocking I/O

(instead of

synchronous

and

asynchronou

s 2) use

“Raw

operation”

rather than

“Raw mode”

3.1 Overview

This chapter primarily describes the differences between the data link interface (DLI) to

Freeway (as described in the Freeway Data Link Interface Reference Guide) and the

DLITE embedded interface in a OpenVMS system, referred to as “DLITE.” Changes to

the scope and nature of Freeway DLI support are described.

This chapter should be read by application programmers who are doing one of the fol-

lowing:

• Porting an existing application (currently operational in the Freeway environ-

ment) to the embedded environment (for example, the embedded ICP2432

PCIbus board).

• Developing an initial DLITE application in the embedded environment. You

should first read the Freeway Data Link Interface Reference Guide and have it avail-

able as your primary reference.

In addition to the Freeway Data Link Interface Reference Guide, the following Protogate

reference documents are of interest to application programmers:

• Freeway Client-Server Interface Control Document (for writing to the socket level)

• The applicable protocol-specific programmer’s guide for your application.

DLITE is a new, streamlined interface designed specifically for the embedded interface

to the ICP2432 board. The interface provides new capabilities while retaining the

majority of the “Freeway DLI” (henceforth referred to as DLI) capabilities. By using