Echelon OpenLDV User Manual download pdf (Page 3)

OpenLDV Programmer’s Guide iii

Welcome

This document describes Echelon’s OpenLDV™ Release 4.0 Network Driver and

Software Development Kit (SDK). The OpenLDV driver is an open driver for

Microsoft

Windows

operating systems that enables Windows applications to

send and receive low-level ISO/IEC 14908-1 messages through compatible

Echelon and third-party network interfaces. The OpenLDV SDK provides

example source code that demonstrates how to use the OpenLDV driver.

Supported network interfaces include local network interfaces (such as the

Echelon U10 or U20 USB Network Interface, PCC-10 PC Card, PCLTA-21 PC

LonTalk

Adapter), and Internet-enabled network interfaces (such as the

Echelon SmartServer and i.LON

600 IP-852 Router).

The OpenLDV driver includes an extensible remote network interface (RNI)

component, called xDriver. The OpenLDV driver uses xDriver to connect an

OpenLDV application, such as an LNS

Server, to remote LONWORKS

networks.

This document describes how to configure and extend xDriver, including

descriptions of the software tools that you use to configure and extend xDriver,

and provides programming samples.

The OpenLDV SDK provides a low-level application programming interface (API)

for network applications. For most L

ONWORKS application developers, using

Echelon’s LNS Network Operating System software provides an interface to the

OpenLDV driver that is easier to use and that significantly reduces the time

required to develop L

ONWORKS applications and tools for Windows environments.

Network tools that use LNS software generally have much higher performance

than those that use only the OpenLDV API. You can find out more about LNS

software on Echelon’s Web site at www.echelon.com/lns

. Contact Echelon Sales

at www.echelon.com/sales if you would like assistance in determining whether

you should develop your network tools with LNS software or with the OpenLDV

API.

Programming with the OpenLDV API requires knowledge of the ISO/IEC 14908-

1 Control Network Protocol. Echelon’s implementation of the ISO/IEC 14908

Control Network Protocol is called the LonTalk protocol. Echelon has

implementations of the LonTalk protocol in several product offerings, including

the Neuron firmware, LNS Server, i.LON 600 IP-852 Router, and SmartServer

Energy Managers. This document refers to the ISO/IEC 14908 Control Network

Protocol as the “LonTalk protocol”, although other interoperable implementations

exist.

Audience

This guide is intended for software developers creating OpenLDV applications for

use with OpenLDV compatible network interface products. Readers of this guide

should be familiar with L

ONWORKS technology.

This guide is also intended for software developers creating xDriver extensions.

Programming samples in this document are written in C++ and Microsoft

Visual

Basic

.NET. However, extensions for xDriver can be written in any language

that supports Component Object Model (COM) components or ActiveX

controls.

Developers of xDriver extensions should have programming experience in such a

language, as well as familiarity with L

ONWORKS technology and COM concepts.

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