Echelon LonBridg Server Manual de usuario descargar pdf (Pagina 26)

20 Using the LonBridge API

Tasks Performed by a LonBridge Application

Using the LonBridge API, a LonBridge application can discover manage

ONWORKS interoperable self-installation (ISI) devices on a LONWORKS network,

communicate with the devices, and communicate with the LonBridge Server

about the devices.

Defining Device Classes

The Classes directory contains device class files that describe classes of devices

that the LonBridge Server supports. A specific LonBridge application can add

support for additional classes of devices by creating additional files in the Classes

directory.

See Chapter

LonBridge Device Class File

, on page 34, for information about

the LonBridge device class file format.

Discovering and Communicating with Devices

The LonBridge API defines a set of XML elements for sending commands to the

LonBridge Server and receiving responses from the LonBridge Server. It also

includes commands for discovering devices and for communicating with devices.

The API provides commands that allow an application to perform the following

tasks:

• Request that LonBridge perform device discovery

• Retrieve information about a device

• Read data from a device

• Write data to a device

In addition, the API provides commands that allow an application to define

tracers to identify and filter messages.

See Chapter

LonBridge API

, on page 23, for information about the API.

Tasks Performed by the LonBridge Server

When the LonBridge Server starts, it initializes a network interface. The

network interface can be any network interface running a layer-5 MIP or the

layer-6 ShortStack Micro Server.

By default, a LonBridge Server built for the Windows platform communicates

with a network interface with a layer-5 MIP through the OpenLDV network

driver. For example, the Echelon U20 USB Network Interface includes a layer-5

MIP and is supported by the OpenLDV network driver.

By default, a LonBridge Server built for the Linux platform communicates with a

network interface running a ShortStack Micro Server through an LDV

compatible network driver. For example, the LonBridge Server can be built for

the Altera Nios II Embedded Evaluation Kit (NEEK) attached to an Echelon PL

3120 or 3150 EVB Evaluation Board running the ShortStack Micro Server.

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