2nd RTL Workshop: A Coming Age for GPS: A RTLinux GPS Receiver

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B.M. Ledvina

GPS, or Global Positioning System, is a key technology for both the civilian and scientific research markets. GPS provides users with precise geodetic positioning and time determination. Most GPS receivers require specialized hardware and complex software to operate. One receiver, known as GPSBuilder-2 originally designed by GEC Plessy, takes a novel approach. This receiver uses a minimal amount of hardware, thus its operation relies extensively upon software. The software runs on a Pentium class machine under DOS and interfaces an ISA card. In an effort to modernize this receiver, we migrated the code to RTLinux. The major aspects of the migrated code are an Interrupt Service Routine, multiple threads, and TCP connectivity. Following the migration we noticed that not only did receiver stability increase dramatically, but also errors in positioning decreased significantly. To provide insight into code migration from DOS to RTLinux, we will focus on the specific difficulties, discoveries, and enlightenments encountered.

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	Ziff Davis Enterprise Home \| Contact Us \| Advertise \| Link to Us \| Reprints \| Magazine Subscriptions \| Newsletters Tech RSS Feeds \| White Papers \| ROI Calculators \| Tech Podcasts \| Tech Video \| VARs \| Channel News
	Baseline \| Careers \| Channel Insider \| CIO Insight \| DesktopLinux \| DeviceForge \| DevSource \| eSeminars \| eWEEK \| Enterprise Network Security \| LinuxDevices \| Linux Watch \| Microsoft Watch \| Mid-market \| Networking \| PDF Zone \| Publish \| Security IT Hub \| Strategic Partner \| Web Buyer's Guide \| Windows for Devices
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Use of this site is governed by our Terms of Service and Privacy Policy. Except where otherwise specified, the contents of this site are copyright © 1999-2008 Ziff Davis Enterprise Holdings Inc. All Rights Reserved. Reproduction in whole or in part in any form or medium without express written permission of Ziff Davis Enterprise is prohibited. Linux is a registered trademark of Linus Torvalds. All other marks are the property of their respective owners.