Android Open Source - smartcar Serial Output

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Back to project page smartcar.

License

The source code is released under:

GNU General Public License

Java Source Code

package piSockets;
/**//from ww w.  j  a  va 2 s . co m
 * Sends bytes to arduino through a serial connection
 * @author Team Pegasus (dimi) 
 * Original source: http://playground.arduino.cc/Interfacing/Java#.Uz1nj3WSxGg
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;

import gnu.io.CommPortIdentifier; 
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent; 
import gnu.io.SerialPortEventListener; 

import java.util.Enumeration;


public class SerialOutput implements SerialPortEventListener {
  SerialPort serialPort;
        /** The port we're normally going to use. */
  private static final String PORT_NAMES[] = { 
      "/dev/tty.usbserial-A9007UX1", // Mac OS X
      "/dev/ttyACM0", // Linux
      "/dev/ttyACM1", // Linux
      "/dev/ttyUSB0", // RPi
      "COM3", // Windows
  };
  /**
  * A BufferedReader which will be fed by a InputStreamReader 
  * converting the bytes into characters 
  * making the displayed results codepage independent
  */
  private BufferedReader input;
  /** The output stream to the port */
  private static OutputStream output;
  /** Milliseconds to block while waiting for port open */
  private static final int TIME_OUT = 2000;
  /** Default bits per second for COM port. */
  private static final int DATA_RATE = 9600;

  public void initialize() {
    CommPortIdentifier portId = null;
    @SuppressWarnings("rawtypes")
    Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

    //First, Find an instance of serial port as set in PORT_NAMES.
    while (portEnum.hasMoreElements()) {
      CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
      for (String portName : PORT_NAMES) {
        if (currPortId.getName().equals(portName)) {
          portId = currPortId;
          break;
        }
      }
    }
    if (portId == null) {
      System.out.println("Could not find COM port.");
      return;
    }

    try {
      // open serial port, and use class name for the appName.
      serialPort = (SerialPort) portId.open(this.getClass().getName(),
          TIME_OUT);

      // set port parameters
      serialPort.setSerialPortParams(DATA_RATE,
          SerialPort.DATABITS_8,
          SerialPort.STOPBITS_1,
          SerialPort.PARITY_NONE);

      // open the streams
      input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));
    
      output = serialPort.getOutputStream();
      Thread.sleep(45);
      // add event listeners
      serialPort.addEventListener(this);
      serialPort.notifyOnDataAvailable(true);
    } catch (Exception e) {
      System.err.println(e.toString());
    }
        System.out.println("ready");
  }

  /**
   * This should be called when you stop using the port.
   * This will prevent port locking on platforms like Linux.
   */
  public synchronized void close() {
    if (serialPort != null) {
      serialPort.removeEventListener();
      serialPort.close();
    }
  }
  
  public void send2Serial(byte[] outMsg){
    try {
      output.write(outMsg);
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }

  /**
   * Handle an event on the serial port. Read the data and print it.
   */
  public synchronized void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
      try {
        //print the input line from the arduino if there is such
        String inputLine=input.readLine();
        System.out.println("Arduino says: " + inputLine);
      } catch (Exception e) {
        System.err.println(e.toString());
      }
    }
    // Ignore all the other eventTypes, but you should consider the other ones.
  }

}

Java Source Code List

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