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/* Copyright 2011 Google Inc. *//from w w w. j a v a 2 s . co m * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * Project home page: http://code.google.com/p/usb-serial-for-android/ */ package com.ht1.cc.USB; import java.util.Map; //import com.hoho.android.usbserial.driver.Cp2102SerialDriver; //import com.hoho.android.usbserial.driver.FtdiSerialDriver; import android.hardware.usb.UsbDevice; import android.hardware.usb.UsbDeviceConnection; import android.hardware.usb.UsbManager; /** * Helper class to assist in detecting and building {@link UsbSerialDriver} * instances from available hardware. * * @author mike wakerly (opensource@hoho.com) */ public enum UsbSerialProber { // TODO(mikey): Too much boilerplate. /** * Prober for {@link FtdiSerialDriver}. * * @see FtdiSerialDriver */ /* FTDI_SERIAL { @Override public UsbSerialDriver getDevice(final UsbManager manager, final UsbDevice usbDevice) { if (!testIfSupported(usbDevice, FtdiSerialDriver.getSupportedDevices())) { return null; } final UsbDeviceConnection connection = manager.openDevice(usbDevice); if (connection == null) { return null; } return new FtdiSerialDriver(usbDevice, connection); } },*/ CDC_ACM_SERIAL { @Override public UsbSerialDriver getDevice(UsbManager manager, UsbDevice usbDevice) { // if (!testIfSupported(usbDevice, CdcAcmSerialDriver.getSupportedDevices())) { // return null; // } final UsbDeviceConnection connection = manager.openDevice(usbDevice); if (connection == null) { return null; } return new CdcAcmSerialDriver(usbDevice, connection); } }; //, /* SILAB_SERIAL { @Override public UsbSerialDriver getDevice(final UsbManager manager, final UsbDevice usbDevice) { if (!testIfSupported(usbDevice, Cp2102SerialDriver.getSupportedDevices())) { return null; } final UsbDeviceConnection connection = manager.openDevice(usbDevice); if (connection == null) { return null; } return new Cp2102SerialDriver(usbDevice, connection); } };*/ /** * Builds a new {@link UsbSerialDriver} instance from the raw device, or * returns <code>null</code> if it could not be built (for example, if the * probe failed). * * @param manager the {@link UsbManager} to use * @param usbDevice the raw {@link UsbDevice} to use * @return the first available {@link UsbSerialDriver}, or {@code null} if * no devices could be acquired */ public abstract UsbSerialDriver getDevice(final UsbManager manager, final UsbDevice usbDevice); /** * Acquires and returns the first available serial device among all * available {@link UsbDevice}s, or returns {@code null} if no device could * be acquired. * * @param usbManager the {@link UsbManager} to use * @return the first available {@link UsbSerialDriver}, or {@code null} if * no devices could be acquired */ public static UsbSerialDriver acquire(final UsbManager usbManager) { for (final UsbDevice usbDevice : usbManager.getDeviceList().values()) { final UsbSerialDriver probedDevice = acquire(usbManager, usbDevice); if (probedDevice != null) { return probedDevice; } } return null; } /** * Builds and returns a new {@link UsbSerialDriver} from the given * {@link UsbDevice}, or returns {@code null} if no drivers supported this * device. * * @param usbManager the {@link UsbManager} to use * @param usbDevice the {@link UsbDevice} to use * @return a new {@link UsbSerialDriver}, or {@code null} if no devices * could be acquired */ public static UsbSerialDriver acquire(final UsbManager usbManager, final UsbDevice usbDevice) { for (final UsbSerialProber prober : values()) { final UsbSerialDriver probedDevice = prober.getDevice(usbManager, usbDevice); if (probedDevice != null) { return probedDevice; } } return null; } /** * Returns {@code true} if the given device is found in the vendor/product map. * * @param usbDevice the device to test * @param supportedDevices map of vendor ids to product id(s) * @return {@code true} if supported */ private static boolean testIfSupported(final UsbDevice usbDevice, final Map<Integer, int[]> supportedDevices) { final int[] supportedProducts = supportedDevices.get( Integer.valueOf(usbDevice.getVendorId())); if (supportedProducts == null) { return false; } final int productId = usbDevice.getProductId(); for (int supportedProductId : supportedProducts) { if (productId == supportedProductId) { return true; } } return false; } }