Echelon i.LON SmartServer User's Guide download pdf (Page 80)

66 Creating Freely Programmable Modules

Creating FPMs Overview

You can use the full version of the i.LON SmartServer 2.0 Programming Tool to create FPMs. The

full version of the i.LON SmartServer 2.0 Programming Tool includes all the components needed to

manage an FPM project:

• Eclipse Development Kit preconfigured for writing, building, and uploading FPMs.

• FPM template files.

• FPM library. A tool for creating the C structures of user-defined UNVTs is also included.

• C++ compiler.

• CYGWIN environment.

Creating an FPM with the full version of the i.LON SmartServer 2.0 Programming Tool, entails

creating a new FPM project or opening an existing project, writing the FPM application or FPM driver

in C or C++, and then compiling the FPM.

You can create a new FPM project from the user-defined functional profile template (UFPT) that you

generated with NodeBuilder Resource Editor and you uploaded to your SmartServer following the

steps described in Chapter 3, Creating FPM Templates. When you create the new FPM project, you

select whether you are creating an FPM application or an FPM driver. An FPM application reads and

writes values to the data points declared in it, executes an algorithm upon data point updates, reads

data point properties, and controls timers and executes code upon their expiration. An FPM driver

provides values for the data points declared in it by reading and writing to the RS-232 and RS-485

ports on the SmartServer. Once the FPM project has been created, you can add any user-defined data

types to your FPM that were not declared in the UFPT.

After you create a new FPM project or import an existing FPM project, you can write the FPM

application or FPM driver in C or C++. Writing the FPM application or FPM driver essentially

requires you to implement four main routines that specify the behavior of your FPM:

Initialize(), Work(), Shutdown(), and OnTimer(). The Initialize() routine is

executed when the FPM is started or enabled; the Work() routine is executed when a data point

declared in the FPM is updated; the Shutdown() routine is executed when the FPM is stopped or

disabled; and the OnTimer()routine is executed when a timer expires.

You can debug your FPMs using a source level debugger (VxWorks 6.2 - Wind River Workbench 2.4)

that you can purchase from Wind River. If you are not using Wind River Workbench to debug your

FPMs, you should follow the FPM coding guidelines described in this chapter so that you can debug

your code more easily. For example, you should frequently insert printf() statements in your code

so that you can view the status of your FPM using the console port of the SmartServer. For more

information on ordering “WindRiver Platform for Industrial Services V3.2 for MIPS32 Processors”,

which includes Wind River Workbench, contact Wind River

sales at

www.windriver.com/company/contact/index.html.

Once you finish writing the FPM, you can compile it. If your code has any errors or warnings, they

will be displayed in the Problems view at the bottom of the document window. You can click on the

errors and warnings listed in this view to debug your FPM. You can also check the Console view

(located to the right of the Problems view) to see if there is more detailed information available for a

given compiler error or warning.

Notes: To use the full version of the i.LON SmartServer 2.0 Programming Tool, you must order and

install the i.LON SmartServer 2.0 Programming Tools DVD. To order the i.LON SmartServer 2.0

Programming Tools DVD (Echelon part number 72111-409), contact your Echelon sales

representative. If you have a demo version of the i.LON SmartServer 2.0 Programming Tool, you can

write FPMs, but you cannot compile and upload them.

If you have already created an FPM project and you want to modify your FPM application or FPM

driver, you can import your FPM project into the current workspace following the steps described in

the

Importing FPM Projects section in Chapter 2. After you import your FPM project, you can

proceed to the

Writing an FPM Application or Writing an FPM Driver section.

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Echelon i.LON SmartServer User's Guide Page 80

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