lejos.gps
Class GPS

java.lang.Object
  java.lang.Thread
      lejos.gps.SimpleGPS
          lejos.gps.GPS

All Implemented Interfaces:

Runnable

public class GPS
extends SimpleGPS

This class manages a data received from a GPS Device. GPS Class manages the following NMEA Sentences: GPRMC GPGSV GPGSA GPGGA (superclass) GPVTG (superclass)

Author:

BB, Juan Antonio Brenha Moral

Field Summary

Fields inherited from class lejos.gps.SimpleGPS

errors, ggaSentence, listeners, vtgSentence

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

GPS(InputStream in)
The constructor.

Method Summary

float	getCompassDegrees() Return Compass Degrees in a range: 0.0-359.9
Date	getDate() Return a Date Object with data from GGA and RMC NMEA Sentence
Satellite	getSatellite(int index) Get NMEA Satellite.
int	getSatellitesInView() The satellites in view is a list of satellites the GPS could theoretically connect to (i.e.
int	getSatellitesTracked() Returns the number of satellites being tracked to determine the coordinates.
protected void	sentenceChooser(String token, String s) Internal helper method to aid in the subclass architecture.

Methods inherited from class lejos.gps.SimpleGPS

addListener, close, getAltitude, getCourse, getFixMode, getFixType, getHDOP, getLatitude, getLatitudeDirection, getLongitude, getLongitudeDirection, getPDOP, getPRN, getSelectionType, getSpeed, getTimeStamp, getVDOP, notifyListeners, removeListener, run

Methods inherited from class java.lang.Thread

currentThread, getPriority, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, setDaemon, setPriority, sleep, start, yield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GPS

public GPS(InputStream in)

The constructor. It needs an InputStream

Parameters:

in - An input stream from the GPS receiver

Method Detail

getCompassDegrees

public float getCompassDegrees()

Return Compass Degrees in a range: 0.0-359.9

Returns:

the compass degrees

getDate

public Date getDate()

Return a Date Object with data from GGA and RMC NMEA Sentence

Returns:

the date

getSatellite

public Satellite getSatellite(int index)

Get NMEA Satellite. The satellite list is retrieved from the almanac data. Satellites are ordered by their elevation: highest elevation (index 0) -> lowest elevation.

Parameters:

index - the satellite index

Returns:

the NMEASaltellite object for the selected satellite

getSatellitesTracked

public int getSatellitesTracked()

Returns the number of satellites being tracked to determine the coordinates. This method overwrites the superclass method and returns the number from the GSV sentence.

Overrides:

getSatellitesTracked in class SimpleGPS

Returns:

Number of satellites e.g. 8

getSatellitesInView

public int getSatellitesInView()

The satellites in view is a list of satellites the GPS could theoretically connect to (i.e. satellites that are not over the earth's horizon). The getSatellitesInView() method will always return an equal or greater number than getSatellitesTracked().

Returns:

Number of satellites e.g. 8

sentenceChooser

protected void sentenceChooser(String token,
                               String s)

Internal helper method to aid in the subclass architecture. Overwrites the superclass method and calls it internally.

Overrides:

sentenceChooser in class SimpleGPS

Parameters:

token -

s -