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Subversion Repositories usb_fpga_2_13

[/] [usb_fpga_2_13/] [trunk/] [libusbJava-src/] [ch/] [ntb/] [usb/] [Usb_Config_Descriptor.java] - Blame information for rev 2

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/*
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 * Java libusb wrapper
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 * Copyright (c) 2005-2006 Andreas Schläpfer <spandi at users.sourceforge.net>
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 *
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 * http://libusbjava.sourceforge.net
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 * This library is covered by the LGPL, read LGPL.txt for details.
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 */
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package ch.ntb.usb;
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/**
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 * Represents the descriptor of a USB configuration.<br>
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 * A USB device can have several different configuration.<br>
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 * <br>
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 * The length of the configuration descriptor is
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 * {@link ch.ntb.usb.Usb_Descriptor#USB_DT_CONFIG_SIZE} and the type is
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 * {@link ch.ntb.usb.Usb_Descriptor#USB_DT_CONFIG}.
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 *
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 */
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public class Usb_Config_Descriptor extends Usb_Descriptor {
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        /**
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         * Maximum number of configurations per device
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         */
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        public static final int USB_MAXCONFIG = 8;
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        private short wTotalLength;
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        private byte bNumInterfaces;
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        private byte bConfigurationValue;
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        private byte iConfiguration;
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        private byte bmAttributes;
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        private byte MaxPower;
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        private Usb_Interface[] interface_;
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        private byte[] extra; /* Extra descriptors */
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        private int extralen;
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        /**
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         * Returns the value to use as an argument to select this configuration ({@link LibusbJava#usb_set_configuration(long, int)}).
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         *
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         * @return the value to use as an argument to select this configuration
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         */
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        public byte getBConfigurationValue() {
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                return bConfigurationValue;
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        }
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        /**
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         * Returns the power parameters for this configuration.<br>
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         * <br>
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         * Bit 7: Reserved, set to 1 (USB 1.0 Bus Powered)<br>
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         * Bit 6: Self Powered<br>
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         * Bit 5: Remote Wakeup<br>
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         * Bit 4..0: Reserved, set to 0
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         *
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         * @return the power parameters for this configuration
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         */
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        public byte getBmAttributes() {
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                return bmAttributes;
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        }
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        /**
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         * Returns the number of interfaces.<br>
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         *
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         * @return the number of interfaces
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         */
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        public byte getBNumInterfaces() {
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                return bNumInterfaces;
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        }
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        /**
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         * Returns the data of extra descriptor(s) if available.<br>
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         *
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         * @return null or a byte array with the extra descriptor data
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         */
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        public byte[] getExtra() {
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                return extra;
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        }
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        /**
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         * Returns the number of bytes of the extra descriptor.<br>
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         *
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         * @return the number of bytes of the extra descriptor
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         */
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        public int getExtralen() {
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                return extralen;
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        }
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        /**
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         * Returns the index of the String descriptor describing this configuration.<br>
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         *
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         * @return the index of the String descriptor
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         */
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        public byte getIConfiguration() {
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                return iConfiguration;
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        }
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        /**
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         * Returns the USB interface descriptors.<br>
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         *
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         * @return the USB interface descriptors
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         */
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        public Usb_Interface[] getInterface() {
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                return interface_;
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        }
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        /**
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         * Returns the maximum power consumption in 2mA units.<br>
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         *
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         * @return the maximum power consumption in 2mA units
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         */
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        public byte getMaxPower() {
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                return MaxPower;
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        }
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        /**
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         * Returns the total length in bytes of all descriptors.<br>
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         * When the configuration descriptor is read, it returns the entire
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         * configuration hierarchy which includes all related interface and endpoint
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         * descriptors. The <code>wTotalLength</code> field reflects the number of
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         * bytes in the hierarchy.
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         *
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         * @return the total length in bytes of all descriptors
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         */
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        public short getWTotalLength() {
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                return wTotalLength;
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        }
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        @Override
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        public String toString() {
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                return "Usb_Config_Descriptor bNumInterfaces: 0x"
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                                + Integer.toHexString(bNumInterfaces);
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        }
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}

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