實作IPC COM控制程式

以下程式用於DMA-6410L 開發平台，其步驟如下：
1. 新增新的activity元件。
2. 修改activityMain.java，更換執行元件。
3. 新增AIDL檔案。
4. 新增COM Service程式。
5. 修改activity程式。
6. 修改Manifest檔案。
7. 安裝及測試














UartIPCactivity.java程式列表:

package tw.com.dmatek.dma6410xp.ipc;

import java.util.Timer;
import java.util.TimerTask;

import tw.com.dmatek.dma6410xp.R;
import tw.com.dmatek.dma6410xp.uart.Linuxc;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;

public class UartIPCactivity extends Activity {
 TextView view1,view2,view;
 
 Spinner spinner1;
 
 String receiveMsg;
 String Msg,str="liwei",ReStr;
 EditText editmsg;
 Button myButton0,myButton1,myButton2,myButton3,myButton4;
 public int num=1; 
 public int fd,set,i=-1,ss=0;
 int p;
 private static final String[] countriesStr =
   { "B1200", "B2400", "B4800", "B9600","B19200","B38400","B57600","B115200","B230400","B921600"};
 private Spinner mySpinner;
 private ArrayAdapter adapter;
 private IUartService uartService=null; 

 private Button.OnClickListener myButton0_listener=new Button.OnClickListener()
 {
  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub

  try {
   if(uartService.openUart(1)>=0)
     setTitle("ipc open device sucess!");
    else
     setTitle("ipc open device false!"); 
  } catch (RemoteException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
   view1.setText("The current COM1");
  }
  
 };

 
 private Button.OnClickListener myButton1_listener=new Button.OnClickListener()
 {
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   try {
    if(uartService.openUart(2)>=0)
      setTitle("ipc open device sucess!");
     else
      setTitle("ipc open device false!"); 
   } catch (RemoteException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
    view1.setText("The current COM2");   
  }  
 };
 
 private Button.OnClickListener myButton2_listener=new Button.OnClickListener()
 {
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub   
   view.setText(null);

  }  
 };

 private Button.OnClickListener myButton3_listener=new Button.OnClickListener()
 {
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
//   timer.cancel();
   try {
    uartService.closeUart(0);
   } catch (RemoteException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   finish();
  }  
 };
 
 private Button.OnClickListener myButton4_listener=new Button.OnClickListener()
 {
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   Msg=editmsg.getText().toString();
   try {
    uartService.sendMsgUart(Msg);
   } catch (RemoteException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }  
 };

 private ServiceConnection mConnection = new ServiceConnection(){

  @Override
  public void onServiceConnected(ComponentName arg0, IBinder arg1) {
   // TODO Auto-generated method stub
   uartService = IUartService.Stub.asInterface(arg1);
  }

  @Override
  public void onServiceDisconnected(ComponentName arg0) {
   // TODO Auto-generated method stub
   uartService = null;
   
  }
  
 };
 
 Timer timer = new Timer();
 
 TimerTask task = new TimerTask() {
  public void run() {
   runOnUiThread(new Runnable() {
    @Override
    public void run() {
     if (uartService!=null) {

      try {
       ReStr=uartService.receiveMsgUart();
      } catch (RemoteException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
      if(ReStr!=null)
       {
        
        view.append(ReStr);
        view.append("\n");
        ReStr=null;
       }
            
     }
      
    }
   });
  }
 };
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.uart);
  timer.schedule(task, 1000, 1000);
  setTitle("IPC Testing");
        bindService(new Intent(UartIPCactivity.this, UartService.class), mConnection , Context.BIND_AUTO_CREATE);

        view1=(TextView)findViewById(R.id.uart_textview);
        view=(TextView)findViewById(R.id.uart_view);
        editmsg=(EditText)findViewById(R.id.uart_edit);
        editmsg.setWidth(200);
        mySpinner=(Spinner)findViewById(R.id.uart_mode);
        myButton0=(Button)findViewById(R.id.uart_button0);
        myButton1=(Button)findViewById(R.id.uart_button1);
        myButton2=(Button)findViewById(R.id.uart_button2);
        myButton3=(Button)findViewById(R.id.uart_button3);
        myButton4=(Button)findViewById(R.id.uart_button4);       
        
        myButton0.setOnClickListener(myButton0_listener);     
        myButton1.setOnClickListener(myButton1_listener);  
        myButton2.setOnClickListener(myButton2_listener);   
        myButton3.setOnClickListener(myButton3_listener);  
        myButton4.setOnClickListener(myButton4_listener);  
        
        adapter = new ArrayAdapter(this,
        android.R.layout.simple_spinner_item, countriesStr);
           
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

          
        mySpinner.setAdapter(adapter);
            
        mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
         {

            @Override
        public void onItemSelected(AdapterView arg0, View arg1, int arg2,long arg3)
          {                              
             try {
     if(uartService!=null) uartService.setUart(arg2);
    } catch (RemoteException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
              arg0.setVisibility(View.VISIBLE);
          }

              @Override
              public void onNothingSelected(AdapterView arg0)
              {
                // TODO Auto-generated method stub
              }

            });   
 }

}

UartService.java程式列表：

package tw.com.dmatek.dma6410xp.ipc;

import tw.com.dmatek.dma6410xp.uart.Linuxc;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;

public class UartService extends Service {
 int fd = -1;
 int ss = 3;
 
 private final IUartService.Stub mBinder = new IUartService.Stub() {

  @Override
  public int setUart(int buad) throws RemoteException {
   // TODO Auto-generated method stub
   ss=buad;
   return Linuxc.setUart(ss);
  }
  
  @Override
  public int openUart(int port) throws RemoteException {
   // TODO Auto-generated method stub
   if(fd>=0) Linuxc.closeUart(0);
   fd=Linuxc.openUart(port);
   
   if(fd>=0)
       {
    Linuxc.setUart(ss);
       }

   return fd;
  }
  
  @Override
  public void closeUart(int port) throws RemoteException {
   // TODO Auto-generated method stub
   Linuxc.closeUart(port);
  }

  @Override
  public int sendMsgUart(String message) throws RemoteException {
   // TODO Auto-generated method stub
   return Linuxc.sendMsgUart(message);
  
  }

  @Override
  public String receiveMsgUart() throws RemoteException {
   // TODO Auto-generated method stub
   return Linuxc.receiveMsgUart();
  }
 };
 @Override
 public IBinder onBind(Intent arg0) {
  // TODO Auto-generated method stub
  return mBinder;
 }
 
}

IUartService.aidl程式列表如下：

package tw.com.dmatek.dma6410xp.ipc;

interface IUartService{
 int openUart(int buad);
 void closeUart(int port);
 int setUart(int port);
 int sendMsgUart(String message);
 String receiveMsgUart();
}