Serial Port Communication error

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2 total messages Started by Magnus Tue, 06 Dec 2005 15:53

#340

Author: Magnus
Date: Tue, 06 Dec 2005 15:53

50 lines
2698 bytes

Hi,

I have one customer (out of ~100) that can't get his communication over 
the Serial port to work and I don't know how to find why this fails. The 
customer can use the serial port to transfer data to other programs.

Any ideas?
Maybe it can be checked/verified in WinXP?
Can I add more exceptions to catch the fault?

Magnus

--- code ---
  public UploadCommunication(String pID) {  // Constr
      try {
          Format formatter = new SimpleDateFormat("yyMMdd-HHmmss");
          LOGFILE = "UploadLog"+formatter.format(new Date())+".txt";

          TimeStamp = new java.util.Date().toString();
          Logg.ULLog(TimeStamp, LOGFILE);

          Enumeration a = CommPortIdentifier.getPortIdentifiers();
          if (!a.hasMoreElements()) {
               Logg.ULLog("No ports found!", LOGFILE);
               boolean stopRead = true;
          }
          portID = CommPortIdentifier.getPortIdentifier(pID);
          serialPort1 = (SerialPort) portID.open("UploadCommunication", 
2000);

          Logg.ULLog(portID.getName() + " opened for instrument 
input",LOGFILE);
     } catch (Exception ee) {
          if (portID == null) {
              Logg.ULLog("PortID is NULL for port: " + pID,LOGFILE);
          } else {
              Logg.ULLog("main catch portID: " + portID, LOGFILE);
          }
          Logg.ULLog("main catch ee: " + ee.toString(),LOGFILE);
          boolean stopRead = true;
          try {serialPort1.close();
          } catch (Exception ce) {} //try to close the port
      }
--- end code ---

--- I get the following in UploadLog ---
Mon Dec 5 14:45:09 GMT-05:00 2005
No ports found!
PortID is NULL for port: COM1
main catch ee: javax.comm.NoSuchPortException

Re: Serial Port Communication error - solved

#344

Author: Magnus
Date: Tue, 13 Dec 2005 20:50

20 lines
1718 bytes

It turned out that the install did not find the correct JRE Home so the 
communication files did not end up in the right directories.

Magnus wrote:
> Hi,
> 
> I have one customer (out of ~100) that can't get his communication over 
> the Serial port to work and I don't know how to find why this fails. The 
> customer can use the serial port to transfer data to other programs.
> 
> Any ideas?
> Maybe it can be checked/verified in WinXP?
> Can I add more exceptions to catch the fault?
> 
> 
> --- I get the following in UploadLog ---
> Mon Dec 5 14:45:09 GMT-05:00 2005
> No ports found!
> PortID is NULL for port: COM1
> main catch ee: javax.comm.NoSuchPortException

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