org.avineas.comli.impl

Class MasterImpl

java.lang.Object

org.avineas.comli.impl.MasterImpl

All Implemented Interfaces:

Master

public class MasterImpl
extends java.lang.Object
implements Master

COMLI master. Takes care of sending and receiving data from/to slaves that are connected to the same channel.

Author:

Arie van Wijngaarden

Constructor Summary

Constructors

Constructor and Description
MasterImpl(Channel channel, long timeout) Create a COMLI master part from a channel and a response timeout

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	request(int destination, byte type, int startAddress, int size) Request data from a slave.
void	setTries(int tries) Set the number of times a message is tried to be sent before it is said to be failed.
boolean	transfer(int destination, byte type, int startAddress, byte[] contents, int offset, int size) Perform a data transfer to a slave node.

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterImpl

public MasterImpl(Channel channel,
          long timeout)

Create a COMLI master part from a channel and a response timeout

Parameters:

channel - The channel to communicate over

timeout - The time out for responses, in ms.

Method Detail

transfer

public boolean transfer(int destination,
               byte type,
               int startAddress,
               byte[] contents,
               int offset,
               int size)

Perform a data transfer to a slave node.

Specified by:

transfer in interface Master

Parameters:

destination - The slave this message is meant for

type - The transfer type

startAddress - The start address

contents - The contents of the addresses

offset - The offset in the buffer to start the data transfer

size - The size of the buffer to send

Returns:

Indication whether the transfer was successful

request

public byte[] request(int destination,
             byte type,
             int startAddress,
             int size)

Request data from a slave.

Specified by:

request in interface Master

Parameters:

destination - The destination/slave number

type - The type of the message

startAddress - The start address

size - The size to request

Returns:

The received data or null if something went wrong

setTries

public void setTries(int tries)

Set the number of times a message is tried to be sent before it is said to be failed.

Parameters:

tries - The number of tries, defaults to 3