Android上控制PL2303HX

[名人堂再聚首]

大家好！
我现在有一个Android开发方面的问题，就是我使用Android的USB Host功能，通过Android手机程序来和单片机通信，使用PL2303HX的USB转RS232或TTL来实现这个功能，目前的问题是，我能在Android平板上发现USB设备，但不能打开，设置其波特率等操作，试了很久都不行，不知哪些兄弟有做过这方面的开发，指点一下，谢谢！

[meegowei1]

//看这里，http://www.2cto.com/kf/201212/174105.html //直接放代码了 package com.android.usb; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.nio.ByteBuffer; import java.util.HashMap; import java.util.Iterator; import com.hoho.android.usbserial.driver.FtdiSerialDriver; import com.hoho.android.usbserial.driver.UsbSerialDriver; import com.hoho.android.usbserial.util.SerialInputOutputManager; import com.hoho.android.usbserial.util.SerialInputOutputManager.Listener; import android.app.Activity; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.hardware.usb.UsbDevice; import android.hardware.usb.UsbDeviceConnection; import android.hardware.usb.UsbManager; import android.os.Bundle; import android.os.Handler; import android.os.SystemClock; import android.util.Log; import android.view.View; import android.widget.*; public class UsbtestActivity extends Activity { /** Called when the activity is first created. */ protected TextView txtTips ; protected EditText edSend ; protected EditText edReceive ; protected Button btnSend ; private UsbManager managerme; private FtdiSerialDriver driver ; //private SerialInputOutputManager rs232ReadWrite ; private ReadThread readThread ; private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION"; //收到 RS232 数据事件 public class ReadListener { public void onRunError(Exception e) { // TODO Auto-generated method stub } public void onNewData( final byte[] data) { // TODO Auto-generated method stub UsbtestActivity.this.runOnUiThread(new Runnable() { public void run() { UsbtestActivity.this.updateReceivedData( data ) ; } }); } }; private ReadListener readListener=new ReadListener(); /*private Listener readListener=new Listener() { public void onNewData(final byte[] data) { UsbtestActivity.this.runOnUiThread(new Runnable() { public void run() { String recString=data.toString(); edReceive.setText(recString) ; } }); } public void onRunError(Exception e) { } }; */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); txtTips=(TextView)this.findViewById(R.id.txtTips) ; edSend=(EditText)this.findViewById(R.id.edSend) ; edReceive=(EditText)this.findViewById(R.id.edReceive) ; btnSend=(Button)this.findViewById(R.id.btnSend) ; managerme = (UsbManager) getSystemService(Context.USB_SERVICE); } @Override protected void onDestroy() { btnCloseClick(null); super.onDestroy(); } //在 调用 getUsb() 时，申请 USB 设备授权时激发 private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); //得到授权 if (ACTION_USB_PERMISSION.equals(action)) { synchronized (this) { UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) { if(device != null){ //call method to set up device communication UsbDeviceConnection connection = managerme.openDevice(device); if(connection==null) { txtTips.setText(txtTips.getText()+"/connection is null"); } else { driver=new FtdiSerialDriver(device,connection); open232Port(); txtTips.setText(txtTips.getText()+"/success connect 2"); } } } else { // Log.d(TAG, "permission denied for device " + device); txtTips.setText(txtTips.getText()+"/permission denied"); } } } //USB 设备被拔出 if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) { UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); if (device != null) { // call your method that cleans up and closes communication with the device btnCloseClick(null); } } } }; private class ReadThread extends Thread{ //private ArrayList<Bundle> mList; private Boolean IsRun=true ; private ReadListener mListener; private static final int BUFSIZ = 4096; private static final int READ_WAIT_MILLIS = 200; private final ByteBuffer mReadBuffer = ByteBuffer.allocate(BUFSIZ); //private final byte[] mReadBuffer=new byte[BUFSIZ]; public ReadThread(ReadListener listener){ super(); mListener = listener; } public void Stop() { IsRun=false ; } public synchronized ReadListener getListener() { return mListener; } public void run(){ while(IsRun) { if(driver!=null) { int len =0; mReadBuffer.clear(); try { len=driver.read(mReadBuffer.array(), READ_WAIT_MILLIS); } catch (Exception e) { // TODO: handle exception } if (len > 0) { final ReadListener listener = getListener(); if (listener != null) { try { final byte[] data = mReadBuffer.toString().getBytes("gbk") ; listener.onNewData(data); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block //e.printStackTrace(); } } mReadBuffer.clear(); } } } } }; //连接到 USB 设备，并打开 RS-232 口 public void getUsb() { HashMap<String, UsbDevice> deviceList = managerme.getDeviceList(); txtTips.setText("size():" + deviceList.size()); Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); while (deviceIterator.hasNext()) { UsbDevice tmpDevice = deviceIterator.next(); //<!-- 梁军 RS232-USB 蕊片 Prolific 0x067B=1659/2303=8963--> //<!-- DTECH USB-232 线 0x0403=1027/0x6001=24577--> //if(usd.getVendorId()==1659 && usd.getProductId()==8963 ) if(tmpDevice.getVendorId()==1027 && tmpDevice.getProductId()==24577 ) { txtTips.setText(txtTips.getText()+"/found usb device "); UsbDeviceConnection connection=null ; if( managerme.hasPermission(tmpDevice)) { connection = managerme.openDevice(tmpDevice); } if(connection==null) { //授权 PendingIntent mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent( ACTION_USB_PERMISSION), 0); IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION); //注册 USB 授权通知器，如果得到授权，而有消息,从而打开设备 registerReceiver(mUsbReceiver, filter); //申请授权,等到 mUsbReceiver 成功则创建 driver managerme.requestPermission(tmpDevice, mPermissionIntent); } else { driver=new FtdiSerialDriver(tmpDevice,connection); open232Port(); txtTips.setText(txtTips.getText()+"/success connect 1"); } //真正打开串口代码在 mUsbReceiver return ; } } } //当 driver 连接后，打开 232 口,并初始化读写线程 public void open232Port() { if(driver!=null) { try { driver.open(); driver.setParameters(9600, UsbSerialDriver.DATABITS_8, UsbSerialDriver.STOPBITS_1, UsbSerialDriver.PARITY_NONE) ; txtTips.setText(txtTips.getText()+"/success open"); readThread=new ReadThread(readListener) ; readThread.start(); //这是一个 interface ，无须调用 run 接口 //rs232ReadWrite=new SerialInputOutputManager(driver,readListener ) ; //rs232ReadWrite.run() ; //Thread.sleep(1000); //rs232ReadWrite.run(); } catch (Exception e) { // TODO: handle exception txtTips.setText(txtTips.getText()+"/open error:"+e.getMessage()); driver=null ; } } else { txtTips.setText(txtTips.getText()+"/connection is null"); } } //打开串口 public void btnOpenClick(View v) { btnCloseClick(v); getUsb(); } //关闭串口 public void btnCloseClick(View v) { if(driver!=null) { /*if(rs232ReadWrite!=null) { rs232ReadWrite.stop(); rs232ReadWrite=null; }*/ if(readThread!=null) { readThread.Stop(); readThread=null ; } driver.close(); driver=null ; } //edReceive.setText("close click") ; } public void btnSendClick(View v) throws UnsupportedEncodingException { //edReceive.setText("buton click") ; if(driver!=null) { byte buffer[] = edSend.getText().toString().getBytes("gbk"); byte endChar[]={0x61,0x62,0x63,0x0d,0x0a} ; try { driver.write(buffer, 500) ; driver.write(endChar, 500) ; //rs232ReadWrite.writeAsync(buffer) ; //rs232ReadWrite.writeAsync(endChar) ; } catch (Exception e) { // TODO: handle exception txtTips.setText(txtTips.getText()+e.getMessage()); } } else { edReceive.setText("driver is null") ; } } private void updateReceivedData(byte[] data) { final String recString=data.toString(); edReceive.setText(recString) ; } }

[名人堂再聚首]

太感谢meegowei1兄弟你了，我马上去测试下。

[名人堂再聚首]

已经搞定了，原来是我的一根GND线没接，谢谢大家！

[w379004118]

你好，我是用的pl2303hxUsb转ttl，但是我的平板电脑识别不了，看资料说平板电脑Usb关于pl2303 的芯片只支持pl2303hxd，ea，ra的，但是我用的是hxa的，不知道这样行不行，想问一下你用的什么芯片。

[熬夜程序员？]

引用 3 楼 jmmx 的回复:

已经搞定了，原来是我的一根GND线没接，谢谢大家！

能不能给发一份源码啊

[c08021205]

你好！群主，我的问题跟你一样， 能发份代码过来吗？