the following is my code
- Code: Select all
import icommand.platform.nxt.*;
import icommand.nxtcomm.*;
import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
public class iCommand0715_1 {
static void checkPort (String portName) throws Exception
{
try
{
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
if(portIdentifier.isCurrentlyOwned())
{
System.out.println("port is currently in use");
}
else
{
System.out.println("no use");
Ultrasonic us = new Ultrasonic(Sensor.S1);
System.out.println("Version: " + us.getVersion());
NXTCommand.close();
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
public static void main(String[] args) {
try
{
//(new TwoWaySerialComm()).connect("COM3");
checkPort("COM8");
}
catch ( Exception e )
{
// TODO Auto-generated catch block
e.printStackTrace();
}
the error message in pc is
- Code: Select all
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
no use
Looking for 'icommand.properties' in working dir: D:\Eclipse\Workspace\iCommand-0715
Looking for 'icommand.properties' in home dir: C:\Documents and Settings\Gary
NXTCOMM = COM8
Error while connecting NXTCommand() constructor
gnu.io.PortInUseException: Unknown Application
at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:354)
at icommand.nxtcomm.NXTComm.open(Unknown Source)
at icommand.nxtcomm.NXTCommand.<clinit>(Unknown Source)
at icommand.platform.nxt.Sensor.setTypeAndMode(Unknown Source)
at icommand.platform.nxt.I2CSensor.<init>(Unknown Source)
at icommand.platform.nxt.Ultrasonic.<init>(Unknown Source)
at iCommand0715_1.checkPort(iCommand0715_1.java:31)
at iCommand0715_1.main(iCommand0715_1.java:52)
java.lang.NullPointerException
at icommand.nxtcomm.NXTComm.sendData(Unknown Source)
at icommand.nxtcomm.NXTCommand.sendRequest(Unknown Source)
at icommand.nxtcomm.NXTCommand.setInputMode(Unknown Source)
at icommand.platform.nxt.Sensor.setTypeAndMode(Unknown Source)
at icommand.platform.nxt.I2CSensor.<init>(Unknown Source)
at icommand.platform.nxt.Ultrasonic.<init>(Unknown Source)
at iCommand0715_1.checkPort(iCommand0715_1.java:31)
at iCommand0715_1.main(iCommand0715_1.java:52)
the error message in NoteBook is
- Code: Select all
Looking for 'icommand.properties' in working dir: C:\JavaTest
Looking for 'icommand.properties' in home dir: C:\Documents and Settings\Adminis
trator
NXTCOMM = COM6
Experimental: JNI_OnLoad called.
Stable Library
=========================================
Native lib Version = RXTX-2.1-7pre20
Java lib Version = RXTX-2.1-7
WARNING: RXTX Version mismatch
Jar version = RXTX-2.1-7
native lib Version = RXTX-2.1-7pre20
Error 0x0 at .\src\termios.c(1296): 操作順利完成。
Error encountered in NXTComm.sendData()
java.io.IOException: Input/output error in writeByte
at gnu.io.RXTXPort.writeByte(Native Method)
at gnu.io.RXTXPort$SerialOutputStream.write(RXTXPort.java:1093)
at icommand.nxtcomm.NXTComm.sendData(Unknown Source)
at icommand.nxtcomm.NXTCommand.sendRequest(Unknown Source)
at icommand.nxtcomm.NXTCommand.setInputMode(Unknown Source)
at icommand.platform.nxt.Sensor.setTypeAndMode(Unknown Source)
at icommand.platform.nxt.I2CSensor.<init>(Unknown Source)
at icommand.platform.nxt.Ultrasonic.<init>(Unknown Source)
at DistanceTest.main(DistanceTest.java:13)
Error 0x0 at .\src\termios.c(1296): 操作順利完成。
Error encountered in NXTComm.sendData()
java.io.IOException: Input/output error in writeByte
at gnu.io.RXTXPort.writeByte(Native Method)
at gnu.io.RXTXPort$SerialOutputStream.write(RXTXPort.java:1093)
at icommand.nxtcomm.NXTComm.sendData(Unknown Source)
at icommand.nxtcomm.NXTCommand.LSGetStatus(Unknown Source)
at icommand.platform.nxt.I2CSensor.<init>(Unknown Source)
at icommand.platform.nxt.Ultrasonic.<init>(Unknown Source)
at DistanceTest.main(DistanceTest.java:13)
my os of pc and notebook are both MS XP , why do i get the different errors , and how do i solve this problem , is my bluetooth wrong with nxt?
who can help me , i surf for many days in google , but i can't find the solution. thanks
