usbprobe.java

这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统

package net.sf.dz.setup;

import java.io.IOException;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;

import usb.core.Bus;
import usb.core.Configuration;
import usb.core.ControlMessage;
import usb.core.Descriptor;
import usb.core.Device;
import usb.core.DeviceDescriptor;
import usb.core.Endpoint;
import usb.core.Host;
import usb.core.HostFactory;
import usb.core.Interface;
import usb.core.USBException;

import org.freehold.jukebox.logger.LogAware;
import org.freehold.jukebox.logger.LogChannel;

public class UsbProbe extends LogAware {

    public static final LogChannel CH_UP = new LogChannel("USB Probe");

    /**
     * Walk the USB bus[ses] and find all the devices with a given
     * <strong>hexadecimal</strong> vendor/product IDs.
     *
     * @param deviceDefs A set of descriptors as strings:
     * "<code>${vendor_id}:${product_id}</code>".
     *
     * @return A set of device descriptors for the devices found, as
     * strings: "<code>${vendor_id}:${product_id}:${serial_number}</code>".
     */
    public Set probe(Set deviceDefs) {
    
        Set result = new TreeSet();
        
        try {
        
            Host usbHost = HostFactory.getHost();
            
            if ( usbHost == null ) {
            
                complain(LOG_WARNING, CH_UP, "No hosts found");
                return result;
            }
            
            Bus busSet[] = usbHost.getBusses();
            
            for ( int idx = 0; idx < busSet.length; idx++ ) {
            
                Bus bus = busSet[idx];
                Device rootHub = bus.getRootHub();
                
                probe(deviceDefs, result, rootHub);
            }
            
        
        } catch ( IOException ioex ) {
        
            complain(LOG_ERR, CH_UP, "Failed to complete the probe:", ioex);
        }
        
        return result;
    }
    
    private void probe(Set deviceDefs, Set result, Device root) throws IOException {
    
        if ( root == null ) {
        
            return;
        }
        
        DeviceDescriptor dd = root.getDeviceDescriptor();
        
        if ( dd.getDeviceClass() == Descriptor.CLASS_HUB ) {
        
            for ( int port = 0; port < root.getNumPorts(); port++ ) {
            
                complain(LOG_DEBUG, CH_UP, "Hub " + dd.getSerial(0) + ": port " + (port + 1));

                Device child = root.getChild(port + 1);
                
                probe(deviceDefs, result, child);
            }
        
        } else {
        
            int vendorId = dd.getVendorId();
            int productId = dd.getProductId();
            String pair = Integer.toHexString(vendorId) + ":" + Integer.toHexString(productId);
            
            complain(LOG_DEBUG, CH_UP, "Found: " + pair);
            
            if ( deviceDefs.contains(pair) ) {
            
                // Aha! Found it!
                
                int languageSet[] = ControlMessage.getLanguages(root);
                int defaultLanguage = 0;
                
                if ( languageSet != null && languageSet.length != 0 ) {
                
                    defaultLanguage = languageSet[0];
                }
                
                String serial = dd.getSerial(defaultLanguage);
                
                result.add(pair + ":" + serial);
            }
            
        }
    }
}