问以编程方式选择两个Uart(ft232r)

EN

// Open an FTDI USB Device
        public boolean begin(int baudrate) {
            for (UsbDevice device : mManager.getDeviceList().values()) {
                Log.i(TAG, "Devices : " + device.toString());

                getPermission(device);
                if (!mManager.hasPermission(device)) {
                    return false;
                }

                // TODO: support any connections(current version find a first
                // device)
                if (getUsbInterfaces(device)) {
                    break;
                }
            }

            if (mSelectedDeviceInfo == null) {
                return false;
            }

            if (mDevice == null) {
                return false;
            }

            if (mDevice.getDeviceClass() == UsbConstants.USB_CLASS_COMM) {
                isCDC = true;
            } else {
                isCDC = false;
            }

            mFTDIEndpointIN = new UsbEndpoint[mSelectedDeviceInfo.mNumOfChannels];
            mFTDIEndpointOUT = new UsbEndpoint[mSelectedDeviceInfo.mNumOfChannels];

            if (isCDC) {
                if (!getCdcEndpoint()) {
                    return false;
                }
            } else {
                if (!setFTDIEndpoints(mInterface,
                        mSelectedDeviceInfo.mNumOfChannels)) {
                    return false;
                }
            }

            if (isCDC) {
                initCdcAcm(mDeviceConnection, baudrate);
            } else {
                initFTDIChip(mDeviceConnection, baudrate);
            }

            Log.i(TAG, "Device Serial : " + mDeviceConnection.getSerial());

            return true;
    }