org.lsst.ccs.drivers.usb
Class UsbCommPipe

java.lang.Object
  org.lsst.ccs.drivers.usb.UsbCommPipe

public class UsbCommPipe
extends Object

Performs I/O operations on a UsbPipe

Author:

Owen Saxton

Constructor Summary

UsbCommPipe(UsbPipe pipe)
Constructor

Method Summary

void	close() Closes the pipe
int	flush() Flushes any pending read data
int	read(byte[] data, int timeout) Reads data from the pipe
int	read(byte[] data, int offs, int leng, int timeout) Reads data from the pipe
int	write(byte[] data) Writes data to the pipe
int	write(byte[] data, int offs, int leng) Writes data to the pipe

Methods inherited from class java.lang.Object

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

Constructor Detail

UsbCommPipe

public UsbCommPipe(UsbPipe pipe)
            throws UsbException

Constructor

Throws:

UsbException

Method Detail

close

public void close()
           throws UsbException

Closes the pipe

Throws:

UsbException - if the device is not open.

write

public int write(byte[] data)
          throws UsbException

Writes data to the pipe

Parameters:

data - Byte array of data to be written.

Returns:

The number of bytes of data actually written.

Throws:

UsbException - if the out endpoint is not open.

write

public int write(byte[] data,
                 int offs,
                 int leng)
          throws UsbException

Writes data to the pipe

Parameters:

data - Byte array containing the data to be written.

offs - The offset of the first byte to be written.

leng - The number of bytes to be written.

Returns:

The number of bytes of data actually written.

Throws:

UsbException - if the out endpoint is not open.

read

public int read(byte[] data,
                int timeout)
         throws UsbException,
                UsbTimeoutException

Reads data from the pipe

Parameters:

data - Byte array to receive the read data.

timeout - The maximum time, in milliseconds, to wait for data.

Returns:

The number of bytes read.

Throws:

UsbException - if the in endpoint is not open.

UsbTimeoutException - if the read times out.

read

public int read(byte[] data,
                int offs,
                int leng,
                int timeout)
         throws UsbException,
                UsbTimeoutException

Reads data from the pipe

Parameters:

data - Byte array to receive the read data.

offs - The offset in data where the read data is to start.

leng - The number of bytes of data to read.

timeout - The maximum time, in milliseconds, to wait for data.

Returns:

The number of bytes read.

Throws:

UsbException - if the in endpoint is not open.

UsbTimeoutException - if the read times out.

flush

public int flush()
          throws UsbException

Flushes any pending read data

Returns:

The number of bytes flushed.

Throws:

UsbException