Motorola SYMBOL MINISCAN MSXX04 Uživatelská příručka stáhnout pdf (Strana 256)

Chapter 21: GPS

GPS Configuration

Psion Mobile Devices Developers Guide

244

AGpsHelperI Class

This class supports AGPS (Assisted Global Positioning System). AGPS reduces Time To First Fix (TTFF) and

increases the likelihood of finding and keeping a fix in poor coverage areas. An overview of this feature is

available in the user manual for your computer. For more detailed information on implementing and using

AGPS on Psion computers see Ingenuity Working.

21.3 GPS Configuration

For an overview of GPS configuration, see the following on Ingenuity Working

community.psion.com/knowledge/w/knowledgebase/689.ikon-gps-settings.aspx.

This process applies to all Psion GPS units, not just that on the Ikôn.

For guidance on selecting a GPS profile see

community.psion.com/knowledge/w/knowledgebase/configuring-the-correct-gps-profile.aspx and

community.psion.com/knowledge/w/knowledgebase/ik-244-n-gps-automobile-profile-scenarios.aspx

21.4 Processing GPS Data

After the GPS hardware is configured:

1. Open the PGS program port.

This is a virtual COM port that can be selected through the GPS applet on the GUI.

2. Read the NMEA data from the GPS program port.

3. Parse the NMEA data.

Parsing GPS data

You have the following options:

• Parse the raw data in your application. See www.gpsinformation.org/dale/nmea.htm

• For Windows CE 6-based, and Windows Mobile 6-based, systems you can use Microsoft GPS Interme-

diate Driver. For information see msdn.microsoft.com/en-us/library/bb158708.aspx

21.5 Getting Started with GPS

For articles on Ingenuity Working that will guide you in getting started with the GPS feature see

the following:

community.psion.com/tags/gps/noteDG

21.6 Code Samples for GPS

For postings on Ingenuity Working that contain code samples that use the GPS feature see:

community.psion.com/tags/gps/codeDG

21.7 GPS API Elements

C++: GPS hardware on all computers with built-in GPS is controlled, and configured, using the

PsionTeklogix::GPS namespace.

.NET: GPS on all computers with built-in GPS is controlled, and configured, using the

PsionTeklogix.GPS namespace.

Reading and parsing NMEA (National Marine Electronics Association) data: Microsoft GPS Interme-

diate Driver. For details see MSDN at msdn.microsoft.com/en-us/library/bb202086.aspx.

Important: Do not open the GPS hardware port. If your application opens the hardware port, the port

cannot be shared with other applications.

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