com.meiglobal.ebds.api
Class EBDS_SerialPort

java.lang.Object
  com.meiglobal.ebds.api.WrappedSerialPort
      com.meiglobal.ebds.api.EBDS_SerialPort

All Implemented Interfaces:

gnu.io.SerialPortEventListener, java.util.EventListener

public class EBDS_SerialPort
extends WrappedSerialPort

Specialized class to handle EBDS communications down a serial port. Uses the custom WrappedSerialPort class to communicate with the device.

Field Summary

static byte	ETX
static byte	STX

Fields inherited from class com.meiglobal.ebds.api.WrappedSerialPort

_buffer, _iRead, _iWrite, _strPortName

Constructor Summary

EBDS_SerialPort(Acceptor acceptor)
Constructor.

Method Summary

protected byte	calcCRC(byte[] b) Calculates the CRC of a byte array.
boolean	getReplyAcked(byte[] reply) Informs if a received reply has been acknowledged.
byte[]	receive() Receives information from the device.
void	resetPort() Attempts to reset the port by closing and re-opening.
void	sendData(byte[] data) Sends data to the device.

Methods inherited from class com.meiglobal.ebds.api.WrappedSerialPort

close, flushInputStream, isOpen, listPorts, openPort, send, serialEvent

Methods inherited from class java.lang.Object

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

Field Detail

STX

public static final byte STX

See Also:

Constant Field Values

ETX

public static final byte ETX

See Also:

Constant Field Values

Constructor Detail

EBDS_SerialPort

public EBDS_SerialPort(Acceptor acceptor)

Constructor.

Parameters:

acceptor - The Acceptor object that will use this serial port.

Method Detail

resetPort

public void resetPort()

Attempts to reset the port by closing and re-opening. This function call will consume (but log) any exceptions.

sendData

public void sendData(byte[] data)
              throws AcceptorException,
                     java.io.IOException

Sends data to the device.

Parameters:

data - The data to be sent.

Throws:

AcceptorException - If message payload is null

java.io.IOException - If there is a problem with the serial port

receive

public byte[] receive()
               throws AcceptorException,
                      SerialReadTimeout

Receives information from the device.

Returns:

A byte array containing the received data.

Throws:

AcceptorException - If an error occurs.

SerialReadTimeout - If a reply is not received in a timely manner.

getReplyAcked

public boolean getReplyAcked(byte[] reply)

Informs if a received reply has been acknowledged.

Parameters:

reply - The byte array reply to check.

Returns:

True if it is ACKed. False if NAKed.

calcCRC

protected byte calcCRC(byte[] b)

Calculates the CRC of a byte array.

Parameters:

b - The byte array.

Returns:

The result of the calculation.