// Sets the current USB device and interface
private boolean setAdbInterface(UsbDevice device, UsbInterface intf) {
if (mDeviceConnection != null) {
if (mInterface != null) {
mDeviceConnection.releaseInterface(mInterface);
mInterface = null;
}
mDeviceConnection.close();
mDevice = null;
mDeviceConnection = null;
}
if (device != null && intf != null) {
UsbDeviceConnection connection = mManager.openDevice(device);
if (connection != null) {
log("open succeeded");
if (connection.claimInterface(intf, false)) {
log("claim interface succeeded");
mDevice = device;
mDeviceConnection = connection;
mInterface = intf;
mAdbDevice = new AdbDevice(this, mDeviceConnection, intf);
log("call start");
mAdbDevice.start();
return true;
} else {
log("claim interface failed");
connection.close();
}
} else {
log("open failed");
}
}
if (mDeviceConnection == null && mAdbDevice != null) {
mAdbDevice.stop();
mAdbDevice = null;
}
return false;
}
/**
* デバイスの切断通知
*
* @return
*/
public String onDetach(UsbDevice device) {
Log.d(TAG, "onDetach:" + device);
if (!device.equals(usbDevice)) {
Log.d(TAG, "onDetach: Other device.");
return "Other device";
}
if (usbConnection != null) {
UsbInterface usbIf = usbDevice.getInterface(INTERFACE_INDEX);
usbConnection.releaseInterface(usbIf);
usbConnection.close();
}
usbConnection = null;
usbDevice = null;
isReady = false;
return null;
}
/** Closes connections, releases resources, cleans up variables */
private void destroy() {
/* Release the interface that was previously claimed and close
* the connection.
*/
connection.releaseInterface(intf);
connection.close();
/* Clear up all of the locals */
device = null;
manager = null;
handler = null;
toggleLEDCount = 0;
lastButtonState = false;
buttonStatusInitialized = false;
closeRequested = false;
connection = null;
intf = null;
}
/**
* Constructor - creates connection to device and launches the thread that runs the actual demo.
*
* @param context Context requesting to run the demo.
* @param device The USB device to attach to.
* @param handler The Handler where demo Messages should be sent.
*/
DemoCustomHID(Context context, UsbDevice device, Handler handler) {
/* Save the device and handler information for later use. */
this.device = device;
this.handler = handler;
/* Get the USB manager from the requesting context */
this.manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
/*
* Get the required interface from the USB device. In this case
* we are hard coding the interface number to 0. In a dynamic example
* the code could scan through the interfaces to find the right
* interface. In this case since we know the exact device we are connecting
* to, we can hard code it.
*/
intf = device.getInterface(0);
/* Open a connection to the USB device */
connection = manager.openDevice(device);
if (connection == null) {
return;
}
/* Claim the required interface to gain access to it */
if (connection.claimInterface(intf, true) == true) {
thread = new Thread(this);
thread.start();
connected = true;
} else {
/* if the interface claim failed, we should close the
* connection and exit.
*/
connection.close();
}
}
public void run() {
Log("USB Thread started");
UsbEndpoint readEp = null;
UsbDeviceConnection usbConnection = null;
UsbInterface Intf = null;
UsbInterface Intf0 = null;
UsbEndpoint readEp0 = null;
UsbEndpoint writeEp0 = null;
byte[] readbuffer = new byte[64];
Log("Entering Read loop");
interfaceclaimed = false;
while (!_shouldstop) {
if (_usbDevice == null) {
Log("No device. Open device and Recheck in 1 sec...");
interfaceclaimed = false;
FindDevice();
Sleep(10000);
continue;
}
if (!interfaceclaimed) {
Log("Read loop Aquiring Interface 0 and Endpoint 1");
Intf = _usbDevice.getInterface(1);
readEp = Intf.getEndpoint(0);
Log("Read loop Aquiring Interface 0 and Endpoint 0");
Intf0 = _usbDevice.getInterface(0);
readEp0 = Intf0.getEndpoint(0);
writeEp0 = Intf0.getEndpoint(1);
if (!_usbManager.getDeviceList().containsKey(_deviceName)) {
Log("Failed to connect to the device. Retrying to acquire it.");
FindDevice();
if (!_usbManager.getDeviceList().containsKey(_deviceName)) {
Log("No device. Recheking in 10 sec...");
_connectionHandler.onDeviceNotFound();
Sleep(10000);
continue;
}
}
try {
usbConnection = _usbManager.openDevice(_usbDevice);
if (usbConnection == null) {
Log(
"Cannot start reader because the user didn't gave me permissions or the device is not present. Retrying in 2 sec...");
_connectionHandler.onUSBPermissionError();
Sleep(2000);
continue;
}
Log("USB loop claiming interface");
// Claim and lock the interface in the android system.
if (usbConnection.claimInterface(Intf, true)
&& usbConnection.claimInterface(Intf0, true)) {
Log("USB loop Interface claimed successful");
interfaceclaimed = true;
_connectionHandler.onUSBDeviceClaimed();
}
} catch (SecurityException e) {
Log(
"Cannot start reader because the user didn't gave me permissions. Retrying in 2 sec...");
interfaceclaimed = false;
Sleep(2000);
continue;
}
}
/*
int filed = readConnection.getFileDescriptor();
int epaddress = readEp.getAddress();
TeensyDeviceUsbNativeHelper nativehelper = new TeensyDeviceUsbNativeHelper(filed,64,epaddress);
nativehelper.beginUrbReadLoop();
byte[] buffer2 = new byte[64];
nativehelper.readUrb(1000, buffer2);
//_receivedQueue.add(buffer2);
Log(String.format("Message received of lengths %s and content: %s", 64, composeString(buffer2)));
*/
synchronized (_writelocker) {
// Queue a USBRequest to USB if any data is in queue
if (_writeQueue.size() > 0) {
byte[] writebuffer = _writeQueue.poll();
Log(String.format("Writing to USB: %s", CAN_Frame.bytesToHexString(writebuffer)));
// Log("USB loop sending bulk write request");
if (usbConnection.bulkTransfer(writeEp0, writebuffer, 64, 100) < 0) {
// failed to transfer
Log("USB loop sending bulk write request FAILED");
} // else Log("USB loop sending bulk write request SUCCEEDED");
}
}
synchronized (_locker) {
// Log("Read loop Waiting for requst to complete");
if (usbConnection.bulkTransfer(readEp0, readbuffer, 64, 100) >= 0) {
byte[] readbuffertrimmed = new byte[readbuffer[0]];
System.arraycopy(readbuffer, 0, readbuffertrimmed, 0, readbuffer[0]);
_receivedQueue.add(readbuffertrimmed);
Log(String.format("Message received: %s", CAN_Frame.bytesToHexString(readbuffer)));
_connectionHandler.onUSBRecieve();
}
}
// Sleep for 10 ms to pause, so other thread can write data or anything.
// As both read and write data methods lock each other - they cannot be run in parallel.
// Looks like Android is not so smart in planning the threads, so we need to give it a
// small time
// to switch the thread context.
// Sleep(10);
}
if (usbConnection != null) {
usbConnection.releaseInterface(Intf);
usbConnection.releaseInterface(Intf0);
interfaceclaimed = false;
usbConnection.close();
_connectionHandler.onUsbStopped();
Log("USB Thread ENDED!");
}
}