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/*
* Java libusb wrapper
* Copyright (c) 2005-2006 Andreas Schlaepfer <spandi at users.sourceforge.net>
*
* http://libusbjava.sourceforge.net
* This library is covered by the LGPL, read LGPL.txt for details.
*/
package ch.ntb.usb;
/**
* Represents the descriptor of a USB interface.<br>
* The interface descriptor could be seen as a header or grouping of the
* endpoints into a functional group performing a single feature of the device.<br>
* <br>
* The length of the interface descriptor is
* {@link ch.ntb.usb.Usb_Descriptor#USB_DT_INTERFACE_SIZE} and the type is
* {@link ch.ntb.usb.Usb_Descriptor#USB_DT_INTERFACE}.
*
*/
public class Usb_Interface_Descriptor extends Usb_Descriptor {
/**
* Maximum number of interfaces
*/
public static final int USB_MAXINTERFACES = 32;
private byte bInterfaceNumber;
private byte bAlternateSetting;
private byte bNumEndpoints;
private byte bInterfaceClass;
private byte bInterfaceSubClass;
private byte bInterfaceProtocol;
private byte iInterface;
private Usb_Endpoint_Descriptor[] endpoint;
private byte[] extra; /* Extra descriptors */
private int extralen;
@Override
public String toString() {
return "Usb_Interface_Descriptor bNumEndpoints: 0x"
+ Integer.toHexString(bNumEndpoints);
}
/**
* Returns the value used to select the alternate setting ({@link LibusbJava#usb_set_altinterface(long, int)}).<br>
*
* @return the alternate setting
*/
public byte getBAlternateSetting() {
return bAlternateSetting;
}
/**
* Returns the class code (Assigned by <a
* href="http://www.usb.org">www.usb.org</a>).<br>
*
* @return the class code
*/
public byte getBInterfaceClass() {
return bInterfaceClass;
}
/**
* Returns the number (identifier) of this interface.<br>
*
* @return the number (identifier) of this interface
*/
public byte getBInterfaceNumber() {
return bInterfaceNumber;
}
/**
* Returns the protocol code (Assigned by <a
* href="http://www.usb.org">www.usb.org</a>).<br>
*
* @return the protocol code
*/
public byte getBInterfaceProtocol() {
return bInterfaceProtocol;
}
/**
* Returns the subclass code (Assigned by <a
* href="http://www.usb.org">www.usb.org</a>).<br>
*
* @return the subclass code
*/
public byte getBInterfaceSubClass() {
return bInterfaceSubClass;
}
/**
* Returns the number of endpoints used for this interface.<br>
*
* @return the number of endpoints used for this interface
*/
public byte getBNumEndpoints() {
return bNumEndpoints;
}
/**
* Returns an array of endpoint descriptors.<br>
*
* @return an array of endpoint descriptors
*/
public Usb_Endpoint_Descriptor[] getEndpoint() {
return endpoint;
}
/**
* Returns the data of extra descriptor(s) if available.<br>
*
* @return null or a byte array with the extra descriptor data
*/
public byte[] getExtra() {
return extra;
}
/**
* Returns the number of bytes of the extra descriptor.<br>
*
* @return the number of bytes of the extra descriptor
*/
public int getExtralen() {
return extralen;
}
/**
* Returns the index of the String descriptor describing this interface.<br>
*
* @return the index of the String descriptor
*/
public byte getIInterface() {
return iInterface;
}
}
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