private ReadPacket read(int numOfBytes) {
byte[] readData = new byte[numOfBytes];
int len = 0;
try {
// UsbInterface mDataInterface = mDevice.getInterface(1);
// UsbEndpoint mReadEndpoint = mDataInterface.getEndpoint(1);
// byte[] mReadBuffer;
// mReadBuffer = new byte[16 * 1024];
//
// int readAmt = Math.min(readData.length, mReadBuffer.length);
// synchronized (mReadBufferLock) {
//
//
// Log.d(TAG, "Read about to call bulk transfer.");
// if (len < 0) {
// // This sucks: we get -1 on timeout, not 0 as preferred.
// // We *should* use UsbRequest, except it has a bug/api oversight
// // where there is no way to determine the number of bytes read
// // in response :\ -- http://b.android.com/28023
// if (IO_TIMEOUT == Integer.MAX_VALUE) {
// // Hack: Special case "~infinite timeout" as an error.
// len = -1;
// }
// len = 0;
// }
//
//// System.arraycopy(mReadBuffer, 0, readData, 0, readAmt);
// }
// len = mConnection.bulkTransfer(mReadEndpoint, readData, readAmt, IO_TIMEOUT);
len = mSerialDevice.getPorts().get(0).read(readData, IO_TIMEOUT);
Log.d(TAG, "Read " + len + " byte(s) complete.");
// Add a 100ms delay for when multiple write/reads are occurring in series
Thread.sleep(100);
// TODO: this debug code to print data of the read, should be removed after
// finding the source of the reading issue
String bytes = "";
int readAmount = len;
for (int i = 0; i < readAmount; i++) bytes += String.format("%02x", readData[i]) + " ";
Log.d(TAG, "Read data: " + bytes);
////////////////////////////////////////////////////////////////////////////////////////
} catch (Exception e) {
Log.e(TAG, "Unable to read from serial device.", e);
}
byte[] data = Arrays.copyOfRange(readData, 0, len);
return new ReadPacket(data);
}
private void writeCommand(int command) {
byte[] packet = new PacketBuilder(command).compose();
if (mSerialDevice != null) {
try {
// UsbInterface mDataInterface = mDevice.getInterface(1);
// UsbEndpoint mWriteEndpoint = mDataInterface.getEndpoint(0);
// mConnection.bulkTransfer(mWriteEndpoint, packet, packet.length,
// IO_TIMEOUT);
mSerialDevice.getPorts().get(0).write(packet, IO_TIMEOUT);
} catch (Exception e) {
Log.e(TAG, "Unable to write to serial device.", e);
}
}
}
@TargetApi(21)
private void scanLeDeviceLollipop(final boolean enable) {
if (enable) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
lollipopScanner = bluetooth_adapter.getBluetoothLeScanner();
}
if (lollipopScanner != null) {
Log.d(TAG, "Starting scanner 21");
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(
new Runnable() {
@Override
public void run() {
is_scanning = false;
if (bluetooth_adapter != null && bluetooth_adapter.isEnabled()) {
lollipopScanner.stopScan(mScanCallback);
}
invalidateOptionsMenu();
}
},
SCAN_PERIOD);
ScanSettings settings =
new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY).build();
is_scanning = true;
lollipopScanner.startScan(null, settings, mScanCallback);
} else {
try {
scanLeDevice(true);
} catch (Exception e) {
Log.e(TAG, "Failed to scan for ble device", e);
}
}
} else {
is_scanning = false;
if (bluetooth_adapter != null && bluetooth_adapter.isEnabled()) {
lollipopScanner.stopScan(mScanCallback);
}
}
invalidateOptionsMenu();
}