1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.hardware; 18 19 import android.annotation.SystemService; 20 import android.compat.annotation.UnsupportedAppUsage; 21 import android.content.Context; 22 import android.os.Build; 23 import android.os.ParcelFileDescriptor; 24 import android.os.RemoteException; 25 26 import java.io.IOException; 27 28 /** 29 * @hide 30 */ 31 @SystemService(Context.SERIAL_SERVICE) 32 public class SerialManager { 33 private static final String TAG = "SerialManager"; 34 35 private final Context mContext; 36 private final ISerialManager mService; 37 38 /** 39 * {@hide} 40 */ SerialManager(Context context, ISerialManager service)41 public SerialManager(Context context, ISerialManager service) { 42 mContext = context; 43 mService = service; 44 } 45 46 /** 47 * Returns a string array containing the names of available serial ports 48 * 49 * @return names of available serial ports 50 */ 51 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) getSerialPorts()52 public String[] getSerialPorts() { 53 try { 54 return mService.getSerialPorts(); 55 } catch (RemoteException e) { 56 throw e.rethrowFromSystemServer(); 57 } 58 } 59 60 /** 61 * Opens and returns the {@link android.hardware.SerialPort} with the given name. 62 * The speed of the serial port must be one of: 63 * 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 64 * 19200, 38400, 57600, 115200, 230400, 460800, 500000, 576000, 921600, 1000000, 1152000, 65 * 1500000, 2000000, 2500000, 3000000, 3500000 or 4000000 66 * 67 * @param name of the serial port 68 * @param speed at which to open the serial port 69 * @return the serial port 70 */ 71 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) openSerialPort(String name, int speed)72 public SerialPort openSerialPort(String name, int speed) throws IOException { 73 try { 74 ParcelFileDescriptor pfd = mService.openSerialPort(name); 75 if (pfd != null) { 76 SerialPort port = new SerialPort(name); 77 port.open(pfd, speed); 78 return port; 79 } else { 80 throw new IOException("Could not open serial port " + name); 81 } 82 } catch (RemoteException e) { 83 throw e.rethrowFromSystemServer(); 84 } 85 } 86 } 87