Google Galaxy Nexus — USB HOST UsbDeviceConnection.bulkTransfer() returns -1 every time / UsbRequest.queue() doesnt work, too

1manager = (UsbManager) getSystemService(Context.USB_SERVICE);
2
3 HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
4 Iterator<String> deviceIterator = deviceList.keySet().iterator();
5 Iterator<UsbDevice> iterUsbDevice = deviceList.values().iterator();
6
7 if(iterUsbDevice.hasNext())
8 {
9 Log.d("USB", " Iter has USB Device");
10 device = iterUsbDevice.next();
11
12 if(manager.hasPermission(device))
13 {
14 Log.d("USB", " Permission OK");
15 }
16 else
17 {
18 Log.d("USB", " Permission faild");
19
20 manager.requestPermission(device, mPermissionIntent);
21
22 if(manager.hasPermission(device))
23 {
24 Log.d("USB", "Now is Permission OK");
25 }
26 }
27
28 Log.d("USB", deviceIterator.next());
29
30 Log.d("USB", String.valueOf(device.getInterfaceCount()));
31 UsbInterface usbInterface = device.getInterface(0);
32
33 Log.d("USB", String.valueOf(usbInterface.getEndpointCount()));
34 usbEndpoint = usbInterface.getEndpoint(0);
35
36
37 usbDeviceConnection = manager.openDevice(device);
38 if(usbDeviceConnection.getFileDescriptor() == -1)
39 {
40 Log.d("USB", "Fails to open DeviceConnection");
41 }
42 else
43 {
44 Log.d("USB", "DeviceConnection open");
45 }
46
47
48 if(usbDeviceConnection.releaseInterface(usbInterface))
49 {
50 Log.d("USB", "Released OK");
51 }
52 else
53 {
54 Log.d("USB", "Released fails");
55 }
56
57
58 if(usbDeviceConnection.claimInterface(usbInterface, true))
59 {
60 Log.d("USB", "Claim OK");
61 }
62 else
63 {
64 Log.d("USB", "Claim fails");
65 }

1final Thread usbThread = new Thread(new Runnable()
2 {
3 public void run()
4 {
5 int value = 0;
6
7 buf[0] = 22;
8 //int numberValue;
9 //usbDeviceConnection.controlTransfer(0x40, 0x11, 0, 0, null, 0, 100);
10
11 while(true)
12 {
13 try
14 {
15 Thread.sleep(1000);
16 }
17 catch (InterruptedException e)
18 {
19 // TODO Auto-generated catch block
20 e.printStackTrace();
21 }
22
23 synchronized(this)
24 {
25
26 number = usbDeviceConnection.bulkTransfer(usbEndpoint, buf, 1, 0);
27
28 if(number < 0)
29 {
30 Log.d("USB", "Bulk Transfer fails -> " + number);
31 }
32 else
33 {
34 Log.d("USB", "Bulk Transfer OK");
35 }
36 }
37
38
39 number = usbDeviceConnection.bulkTransfer(usbEndpoint, buf, 1, 100);
40
41 if(number < 0)
42 {
43 Log.d("Ewgenij", "Bulk Transfer fails -> " + number);
44 }
45 else
46 {
47 Log.d("Ewgenij", "Bulk Transfer OK");
48 }
49
50 }
51 }
52 }
53 );