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Android串口通信（基于Tiny6410平台）

2024-07-07 17:19:38   222人阅读

友善之臂的Android系统有他们自己编写的一个串口通信程序，网上没有找到他的源代码，而且界面操作不在一个界面，不是很方便，这里我自己写了一个粗糙点的串口通信程序。
同样这里还是调用友善之臂的friendlyarm-hardware.so库文件。
在Android工程文件下面加入com.friendlyarm.androidSDK包，在其下添加HardwareControler.java。下面我把我做的截图发上来。
                                                 
主程序代码：
  1. package geekle.lab;

  3. import android.app.Activity;
  4. import android.os.Bundle;
  5. import android.os.Handler;
  6. import android.os.Message;
  7. import android.text.method.ScrollingMovementMethod;
  8. import android.util.Log;
  9. import android.view.View;
  10. import android.view.View.OnClickListener;
  11. import android.view.WindowManager;
  12. import android.widget.AdapterView;
  13. import android.widget.ArrayAdapter;
  14. import android.widget.Button;
  15. import android.widget.EditText;
  16. import android.widget.Spinner;
  17. import android.widget.TextView;
  18. import android.widget.Toast;

  20. import com.friendlyarm.AndroidSDK.HardwareControler;

  22. public class SerialPortActivity extends Activity
  23. {
  24.     private static final String[] serial_port={"/dev/s3c2410_serial0","/dev/s3c2410_serial1","/dev/s3c2410_serial2"};
  25.     private static final String[] baud_rate={"4800","9600","19200","115200"};
  26.     
  27.     TextView chooseserialPortView;
  28.     TextView choosebaudRateView;
  29.     TextView commucationView;
  30.     EditText editmsg;
  31.     private Button stopButton;
  32.     private Button sendButton;
  33.     private Spinner choose_serialport;
  34.     private Spinner choose_baudrate;
  35.     private ArrayAdapter<String> serialportAdapter;
  36.     private ArrayAdapter<String> baudrateAdaptera;
  37.     
  38.     private int fd = 0;
  39.     String thread = "readThread";
  40.     String choosed_serial = "/dev/s3c2410_serial2";
  41.     int choosed_buad = 19200;
  42.     byte[] buf= new byte[300];

  44.     /** Called when the activity is first created. */
  45.     @Override
  46.     public void onCreate(Bundle savedInstanceState)
  47.     {
  48.         super.onCreate(savedInstanceState);
  49.         setContentView(R.layout.main);
  50.         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏
  51.         chooseserialPortView = (TextView)findViewById(R.id.choose_serialPort_text);
  52.         choose_serialport = (Spinner)findViewById(R.id.choose_seriaPort_spinner);
  53.         chooseserialPortView = (TextView)findViewById(R.id.choose_baudRate_text);
  54.         choose_baudrate = (Spinner)findViewById(R.id.choose_baudRate_spinner);
  55.                 
  56.         serialportAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,serial_port);//建立下拉控件的适配器
  57.         baudrateAdaptera = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,baud_rate);
  58.         serialportAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
  59.         baudrateAdaptera.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
  60.         choose_serialport.setAdapter(serialportAdapter);//连接控件和适配器
  61.         choose_baudrate.setAdapter(baudrateAdaptera);
  62.         choose_serialport.setSelection(2);
  63.         choose_baudrate.setSelection(2);
  64.         
  65.         choose_serialport.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
  66.         {
  67.             
  68.             public void onItemSelected(AdapterView<?> arg0, View arg1,
  69.                     int arg2, long arg3) {
  70.                 // TODO Auto-generated method stub
  71.                 choosed_serial = serial_port[arg2];
  72.             }

  74.             public void onNothingSelected(AdapterView<?> arg0) {
  75.                 // TODO Auto-generated method stub
  76.                 
  77.             }
  78.             
  79.         });
  80.             
  81.         choose_baudrate.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
  82.         {
  83.             
  84.             public void onItemSelected(AdapterView<?> arg0, View arg1,
  85.                     int arg2, long arg3) {
  86.                 // TODO Auto-generated method stub
  87.                 choosed_buad = Integer.parseInt(baud_rate[arg2]);
  88.             }

  90.             public void onNothingSelected(AdapterView<?> arg0) {
  91.                 // TODO Auto-generated method stub
  92.                 
  93.             }
  94.             
  95.         });
  96.         fd = HardwareControler.openSerialPort(choosed_serial,choosed_buad, 8, 1);//打开串口
  97.         if (fd != -1) {
  98.             Toast.makeText(getApplicationContext(), getResources().getString(R.string.open_serial_success)+choosed_serial, 1).show();
  99.         } else {
  100.             Toast.makeText(this, getResources().getString(R.string.open_fail), 1).show();
  101.         }
  102.         stopButton = (Button)findViewById(R.id.stopButton);
  103.         stopButton.setOnClickListener(new ClickEvent());
  104.         
  105.         sendButton = (Button)findViewById(R.id.sendButton);//发送消息
  106.         sendButton.setOnClickListener(new OnClickListener() {
  107.             
  108.             public void onClick(View arg0) {
  109.                 // TODO Auto-generated method stub
  110.                 HardwareControler.write(fd, editmsg.getText().toString().getBytes());
  111.                 commucationView.append(editmsg.getText()+"\n");
  112.             }
  113.         });

  115.         commucationView = (TextView)findViewById(R.id.commucation_window);
  116.         commucationView.setMovementMethod(ScrollingMovementMethod.getInstance()); //让textview实现滚动
  117.         editmsg = (EditText)findViewById(R.id.editmsg);
  118.         
  119.         new readThread().start();//开始串口的监听线程
  120.         
  121.     }
  122.     
  123.     public class ClickEvent implements Button.OnClickListener//退出
  124.     {
  125.         public void onClick(View arg0) {
  126.             // TODO Auto-generated method stub
  127.             android.os.Process.killProcess(android.os.Process.myPid());
  128.             System.exit(0);
  129.         }
  130.     }
  131.     Handler handler = new Handler() {
  132.         public void handleMessage(Message msg) {
  133.             switch (msg.arg1) {
  134.             case 0:
  135.                 int len = HardwareControler.read(fd, buf, 300);    
  136.                 String string = new String(buf, 0, len);
  137.                 commucationView.append(string+"\n");
  138.                 new readThread().start();//处理完消息后立即开启监听线程
  139.                 Log.d(thread,"接收到数据，新线程启动");
  140.                 break;
  141.             case 1:
  142.                 HardwareControler.setLedState(1, 0);
  143.                 new readThread().start();
  144. //                Log.d(thread,"没有数据，新线程启动");
  145.                 break;
  146.             default:
  147.                 break;
  148.             }
  149.         }
  150.     };
  151.     
  152.     class readThread extends Thread//读取串口信息线程
  153.     {        
  154.         public void run()
  155.         {
  156.             Message msg = new Message();
  157.             HardwareControler.setLedState(0, 0);
  158.             if (HardwareControler.select(fd,5, 0)==1) {            
  159.                 msg.arg1 = 0;            
  160.             }
  161.             else {
  162.                 msg.arg1 =1;
  163.                 HardwareControler.setLedState(0, 1);
  164.             }
  165.             handler.sendMessage(msg);
  166.         }
  167.     }
  168. }
main.xml代码：
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="fill_parent"
  4.     android:layout_height="fill_parent"
  5.     android:orientation="vertical" >

  7.     <TextView
  8.         android:id="@+id/choose_serialPort_text"
  9.         android:layout_width="fill_parent"
  10.         android:layout_height="wrap_content"
  11.         android:text="@+string/chooseserialPort" />

  13.     <Spinner
  14.         android:id="@+id/choose_seriaPort_spinner"
  15.         android:layout_width="wrap_content"
  16.         android:layout_height="40dp" >
  17.     </Spinner>

  19.     <TextView
  20.         android:id="@+id/choose_baudRate_text"
  21.         android:layout_width="wrap_content"
  22.         android:layout_height="wrap_content"
  23.         android:text="@+string/choosebaudRate" />

  25.     <Spinner
  26.         android:id="@+id/choose_baudRate_spinner"
  27.         android:layout_width="wrap_content"
  28.         android:layout_height="40dp" >
  29.     </Spinner>


  32.          <TextView
  33.           android:id="@+id/commucation_window"
  34.           android:layout_width="fill_parent"
  35.           android:layout_height="190dp" >
  36.          </TextView>
  37.     <EditText
  38.         android:id="@+id/editmsg"
  39.         android:layout_width="fill_parent"
  40.         android:layout_height="wrap_content"
  41.         android:hint="edit here" />

  43.     <LinearLayout
  44.         android:layout_width="fill_parent"
  45.         android:layout_height="wrap_content"
  46.         android:layout_weight="1"
  47.         android:orientation="horizontal" >

  49.         <Button
  50.             android:id="@+id/sendButton"
  51.             android:layout_width="wrap_content"
  52.             android:layout_height="wrap_content"
  53.             android:layout_weight="1"
  54.             android:text="@+string/send" />

  56.         <Button
  57.             android:id="@+id/stopButton"
  58.             android:layout_width="wrap_content"
  59.             android:layout_height="wrap_content"
  60.             android:layout_weight="1"
  61.             android:text="@string/stopButton" />
  62.     </LinearLayout>

  64. </LinearLayout>


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