Android上控制PL2303HX
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！
[解决办法]
//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) ;
}
}