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The GPS driver takes GPS sentences in the NMEA protocol from a serial port on the cyber jacket, and interprets them. It then stores the positional data in a structure and waits for the GPS data to be refreshed, or for another process to connect to a socket and request positional information. If the data is not refreshed in a certain time, the GPS driver discards the current data, and unregisters the GPS service with the Device Manager. Once new valid GPS sentences arrive, the GPS service is re registered with the device manager.
The GPS driver is not very clever, and is really more of a converter, transforming data from the NMEA format, into a format that is more like that used by the jacket.
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Last updated: January 14, 2000.
ęCopyright Hewlett-Packard 1997-2000.