a3814e2443
- some javadoc changes - package descriptions added git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@160 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c
77 lines
2.1 KiB
Java
77 lines
2.1 KiB
Java
package ch.ntb.usb;
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import java.util.Iterator;
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import java.util.LinkedList;
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import ch.ntb.usb.logger.LogUtil;
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import ch.ntb.usb.logger.UsbLogger;
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/**
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* This class manages all USB devices and defines some USB specific constants.<br>
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*
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* @author schlaepfer
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*
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*/
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public class USB {
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/**
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* The maximum packet size of a bulk transfer when operation in highspeed
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* (480 MB/s) mode.
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*/
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public static int HIGHSPEED_MAX_BULK_PACKET_SIZE = 512;
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/**
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* The maximum packet size of a bulk transfer when operation in fullspeed
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* (12 MB/s) mode.
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*/
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public static int FULLSPEED_MAX_BULK_PACKET_SIZE = 64;
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private static UsbLogger logger = LogUtil.ch_ntb_usb;
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private static LinkedList<Device> devices = new LinkedList<Device>();
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/**
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* Create a new device an register it in a device queue. If the device is
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* already registered, a reference to it will be returned.<br>
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*
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* @param idVendor
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* the vendor id of the USB device
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* @param idProduct
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* the product id of the USB device
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* @return a newly created device or an already registered device
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*/
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public static Device getDevice(short idVendor, short idProduct) {
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// check if this device is already registered
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Device dev = getRegisteredDevice(idVendor, idProduct);
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if (dev != null) {
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logger.info("return already registered device");
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return dev;
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}
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dev = new Device(idVendor, idProduct);
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logger.info("create new device");
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devices.add(dev);
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return dev;
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}
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/**
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* Get an already registered device or null if the device does not exist.<br>
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*
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* @param idVendor
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* the vendor id of the USB device
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* @param idProduct
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* the product id of the USB device
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* @return the device or null
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*/
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private static Device getRegisteredDevice(short idVendor, short idProduct) {
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for (Iterator<Device> iter = devices.iterator(); iter.hasNext();) {
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Device dev = iter.next();
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if ((dev.getIdVendor() == idVendor)
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&& (dev.getIdProduct() == idProduct)) {
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return dev;
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}
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}
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return null;
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}
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}
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