Eugen G.
- Forum posts: 4
Apr 17, 2012, 11:59:56 AM via Website
Apr 17, 2012 11:59:56 AM via Website
I have a problem with my galaxy nexus 4.0.4. I try to connect to my Device over the USB.
I have done all initializations without failure. The UsbDeviceConnection.controlTransfer() function works fine in both directions.
However if I call UsbDeviceConnection.bulkTransfer() it always returns -1.
Has anyone encountered the same issue? If code is mandated I'll post it!
If I use UsbRequest.queue() following with UsbDeviceConnection.requestWait(), the same problem occurs and no data will be transfered.
If I try to communicate with the named function that doesn't work because my device doesn't generate an interrupt. It looks like no data leaves the Android device with these functions!
Who have experience?
I hope to get some answers or help!
Below my code.
Init code
Now the code in the thread
I have done all initializations without failure. The UsbDeviceConnection.controlTransfer() function works fine in both directions.
However if I call UsbDeviceConnection.bulkTransfer() it always returns -1.
Has anyone encountered the same issue? If code is mandated I'll post it!
If I use UsbRequest.queue() following with UsbDeviceConnection.requestWait(), the same problem occurs and no data will be transfered.
If I try to communicate with the named function that doesn't work because my device doesn't generate an interrupt. It looks like no data leaves the Android device with these functions!
Who have experience?
I hope to get some answers or help!
Below my code.
Init code
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 }
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 }
Now the code in the thread
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 );
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 );
