Package lejos.hardware.gps

Class GPS

java.lang.Object

java.lang.Thread

lejos.hardware.gps.SimpleGPS

lejos.hardware.gps.GPS

All Implemented Interfaces:

java.lang.Runnable

public class GPS
extends SimpleGPS

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

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Date	date
private GSVSentence	gsvSentence
private RMCSentence	rmcSentence

Fields inherited from class lejos.hardware.gps.SimpleGPS

ggaSentence, gsaSentence, vtgSentence

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
GPS(java.io.InputStream in) The constructor.

Method Summary

Modifier and Type	Method and Description
float	getCompassDegrees() Return Compass Degrees in a range: 0.0-359.9
java.util.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(java.lang.String header, java.lang.String s) Internal helper method to aid in the subclass architecture.
private void	updateDate() Update Date values
private void	updateTime() Update Time values

Methods inherited from class lejos.hardware.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

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

rmcSentence

private RMCSentence rmcSentence

gsvSentence

private GSVSentence gsvSentence

date

private java.util.Date date

Constructor Detail

GPS

public GPS(java.io.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 java.util.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(java.lang.String header,
                               java.lang.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:

header -

s -

updateTime

private void updateTime()

Update Time values

updateDate

private void updateDate()

Update Date values