Java Communications API PocketPC/WinCE Driver: Changes

Version 0.8 pre 1

• If an error occurs enumerating the ports then print the error on System.out instead of a native MessageBox

Version 0.7 (13 February 2003)

• Enabled workaround of the JNI bug in Suns pjava 1.1b1 VM.
  • This should be enabled automatically if needed, however you can overrdide detection by setting the property "serial.port.sunjnifix" to "true" or "false".
  • Currently this is enabled for MIPS and ARM processors only.

Version 0.6 (30 Janurary 2003)

• Fixed port open bug.

Version 0.5 (10 Janurary 2003)

• Implemented ability to override comm port detection (-Dserial.ports=COMnn:,COMnn:)
• Implemented ability to change flowcontrol, see:
  • setFlowControlMode(int)
• Implemented UART status methods, see:
  • setDTR(boolean)
  • setRTS(boolean)
  • isCD
  • isCTS
  • isDSR
  • isRI
• Implemented sendBreak(int) method
• Implemented event notifications, see:
  • addEventListener(SerialPortEventListener)
  • notifyOnXXX(boolean)
  • removeEventListener()
• Implemented Comm time-outs
  • Implemented the xxxReceiveTimeout methods
  • The xxxReceiveThreshold methods have not been implemented yet.
• Efficient implementation of write(byte[]) and write(byte[], int, int)
  • added native method to write a byte array without calling write for each byte
• Better feedback to java level if an error occurs
  • in previous versions the error was signalled with a message box from native level and a generic IOException may have been thrown
• Fixed bug in native implementation of read(byte[])
  • we now check the number of bytes read > 0 before copying the data into the jbytearray (prevents the ArrayIndexOutOfBoundsException when the port is closed)
• General code cleanup
  • remove old code & debug statements
  • remove native methods for reading/writing singular bytes (reduce clutter)
  • remove redundant code - should increase read efficiency

version 0.4 (16 Dec 2001)

• Automatic enumeration of comm ports.
• Ability to change port properties - baud, parity, stop bits and data bits
• Default port settings now match those of the Java Communications spec
  • 9600 baud, 8 data bits, 1 stop bit, no parity
• Include commapi and javax.comm.properties in the build
• Fixed bad JNI coding (caused hang when used with Insignia Solutions Jeode EVM)

version 0.3 (28 June 2001)

• implemented the available() function to return the number of bytes that can be read without blocking.

version 0.2 (27 March 2001)

• No longer any hardcoded limitations on the number of ports you can open.
• Improved I/O efficiency -
  • Can now read into a byte array.
  • Writes are still handled on a per byte basis.

version 0.1 (13 March 2001)

• First Release
• Basic I/O functionality -synchronous byte reads/writes via Input/OutputStreams.
• Receive Framing is not implemented
• Direct access to port status (CTS RTS etc...) is not implemented
• Port settings are fixed at: 4800 baud, 8 data bits, 1 stop bit, N no parity (Will add the functionality to change this later)