org.iu.gps
Class GPSDriver

java.lang.Object
  |
  +--org.iu.gps.GPSDriver

All Implemented Interfaces:

java.lang.Runnable

public class GPSDriver

extends java.lang.Object

implements java.lang.Runnable

This class realizes access to GPS devices over a serial line (NMEA0183 message format). GPSDriver has the following features: - auto-detection of the GPS device's serial line - logging of GPS information into a file - playback of previously logged GPS information (application transparent; application thinks data comes from GPS)

Constructor Summary

GPSDriver()
Creates a close GPSDriver instance.

GPSDriver(java.lang.String port, int baudRate)
Creates a new GPSDriver instance, open and listening on the given serial port with the specified baudRate.

Method Summary

void	addGPSListener(GPSListener gl) Add new GPS listener.
void	close() Close the GPS device.
static org.iu.gps.GPSDriver.Configuration	detect() Tries to find the serial line + baudRate to which a GPS is connected to.
void	disableHardware() Disables GPS hardware reporting.
void	disableLogging() Disable logging.
void	disableRawLogging() Stops logging process.
void	disableReplay() Disables replay mode.
void	enableHardware() Enables GPS hardware reporting.
void	enableLogging(java.io.OutputStream s) Enables logging current GPS data into a stream.
void	enableRawLogging(java.io.OutputStream s) Start logging GPS information into the given output stream (usually a FileOutputStream will be used).
void	enableReplay(java.io.InputStream logStream) Enables replay from a previously logged stream.
static int[]	getBaudrateList() Returns the list of all known baud rates.
org.iu.gps.GPSDriver.Configuration	getConfiguration() Return the current GPS configuration.
GPSInfo	getGPSInfo() Obtain the current GPS information.
static java.lang.String[]	getPortList() Returns the list of all known serial ports.
void	gpsThread() Method
boolean	isAlive() Checks if the GPS is alive according to the following definition: There have been more than 5 valid NMEA messages on the current serial line.
void	logThread() Method
static void	main(java.lang.String[] arg) The main program for the GPSDriver class
static void	normGPSInfo(GPSInfo gi) Normalize GPS Information: convert from degrees/minutes to degrees only representation, convert from the GPS ellipsoid, and fill in the GaussKrueger coordinates
static double	normLatLong(double c) Method
void	open(org.iu.gps.GPSDriver.Configuration cfg) Open the GPSDevice using the given configuration.
void	open(java.io.InputStream logStream) Open GPSDevice using an input stream to replay logged GPS information.
void	removeGPSListener(GPSListener gl) Remove GPS listener.
void	replayThread() Method
void	run() Main thread.
void	setSimulationInfo(GPSInfo gi) Simulate a GPS device that returns the given GPSInfo.
void	setSimulationPosition(double lat, double lon) Sets the current GPSInfo to the given position.
void	setupGPS(java.lang.String port, int baudRate) Setup the GPS hardware.

Methods inherited from class java.lang.Object

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

Constructor Detail

GPSDriver

public GPSDriver(java.lang.String port,
                 int baudRate)
          throws java.lang.Exception

Creates a new GPSDriver instance, open and listening on the given serial port with the specified baudRate.

Parameters:

port - Symbolic name of serial port to listen on (/dev/ttySX on UN*X, or COMx: on Win32)

baudRate - Baudrate to use in communication with the GPS device

Throws:

java.lang.Exception - Exception

java.lang.Exception - Throws various exceptions if comm. cannot be established, or if the port does not exist.

GPSDriver

public GPSDriver()

Creates a close GPSDriver instance.

Method Detail

getPortList

public static java.lang.String[] getPortList()

Returns the list of all known serial ports.

Returns:

List of ports.

getBaudrateList

public static int[] getBaudrateList()

Returns the list of all known baud rates.

Returns:

List of Baud rates.

main

public static void main(java.lang.String[] arg)
                 throws java.lang.Exception

The main program for the GPSDriver class

Parameters:

arg - The command line arguments

Throws:

java.lang.Exception - Exception

detect

public static org.iu.gps.GPSDriver.Configuration detect()

Tries to find the serial line + baudRate to which a GPS is connected to.

Returns:

GPS configuration, or null if no GPS was found.

normGPSInfo

public static void normGPSInfo(GPSInfo gi)

Normalize GPS Information: convert from degrees/minutes to degrees only representation, convert from the GPS ellipsoid, and fill in the GaussKrueger coordinates

Parameters:

gi - GPSInfo to normalize.

normLatLong

public static double normLatLong(double c)

Method

Parameters:

c - Parameter

Returns:

Returned Value

setSimulationInfo

public void setSimulationInfo(GPSInfo gi)

Simulate a GPS device that returns the given GPSInfo. Note: Disables hardware and replay modes.

Parameters:

gi - GPSInfo to use.

setSimulationPosition

public void setSimulationPosition(double lat,
                                  double lon)

Sets the current GPSInfo to the given position. The rest of the GPSInfo fields are set to default values. Note: This is a convenience method for setSimulationInfo(...)

Parameters:

lat - Latitude to use for simulation.

lon - Longitude to use for simulation.

setupGPS

public void setupGPS(java.lang.String port,
                     int baudRate)
              throws java.lang.Exception

Setup the GPS hardware.

Parameters:

port - Serial port.

baudRate - Baud rate of GPS device.

Throws:

java.lang.Exception -

getConfiguration

public org.iu.gps.GPSDriver.Configuration getConfiguration()

Return the current GPS configuration.

Returns:

Configuration

isAlive

public boolean isAlive()

Checks if the GPS is alive according to the following definition: There have been more than 5 valid NMEA messages on the current serial line. This method can be used to search for the serial port.

Returns:

True if GPS is alive, false otherwise.

getGPSInfo

public GPSInfo getGPSInfo()

Obtain the current GPS information.

Returns:

GPS information.

open

public void open(org.iu.gps.GPSDriver.Configuration cfg)
          throws java.lang.Exception

Open the GPSDevice using the given configuration.

Parameters:

cfg - Configuration.

Throws:

java.lang.Exception - If comm. to GPS cannot be established.

open

public void open(java.io.InputStream logStream)
          throws java.lang.Exception

Open GPSDevice using an input stream to replay logged GPS information.

Parameters:

logStream - Input stream with logged GPS information.

Throws:

java.lang.Exception - If the stream is in error.

enableReplay

public void enableReplay(java.io.InputStream logStream)
                  throws java.lang.Exception

Enables replay from a previously logged stream. Automatically detects raw and our internal log formats.

Parameters:

logStream - Stream with logged information.

Throws:

java.lang.Exception - In case the stream cannnot be opened or the format cannot be detected, an IllegalArgumentException is thrown.

disableReplay

public void disableReplay()

Disables replay mode.

enableHardware

public void enableHardware()

Enables GPS hardware reporting.

disableHardware

public void disableHardware()

Disables GPS hardware reporting.

enableRawLogging

public void enableRawLogging(java.io.OutputStream s)

Start logging GPS information into the given output stream (usually a FileOutputStream will be used).

Parameters:

s - Output stream to use for logging.

disableRawLogging

public void disableRawLogging()

Stops logging process. Does nothing if logging was not enabled.

enableLogging

public void enableLogging(java.io.OutputStream s)

Enables logging current GPS data into a stream.

Parameters:

s - Stream to use for logging.

disableLogging

public void disableLogging()

Disable logging.

close

public void close()
           throws java.io.IOException

Close the GPS device.

Throws:

java.io.IOException -

replayThread

public void replayThread()

Method

logThread

public void logThread()

Method

gpsThread

public void gpsThread()

Method

run

public void run()

Main thread.

Specified by:

run in interface java.lang.Runnable

addGPSListener

public void addGPSListener(GPSListener gl)

Add new GPS listener.

Parameters:

gl - GPSListener to add.

removeGPSListener

public void removeGPSListener(GPSListener gl)

Remove GPS listener.

Parameters:

gl - GPSListener to remove.