友善之臂Mini6410之Android开发学习笔记（4）-EEPROM Demo

绝地灬酷狼 2022-06-13 01:49 223阅读 0赞

友善之臂Mini6410之Android开发学习笔记源码同步更新，请使用git工具进行同步。关于Git工具更多信息，请参考：[http://progit.org/book/zh/][http_progit.org_book_zh]

git clone https://code.google.com/p/androiddemoformini6410/

EEPROMActivity.java

package com.mini6410.EEPROM;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.text.Editable;
    import android.view.View;
    import android.view.Window;
    import android.widget.Button;
    import android.widget.EditText;
    
    import com.mini6410.R;
    
    
    /**
     * 
     * ClassName:EEPROMActivity
     * Reason:	 EEPROM Demo
     *
     * @author   snowdream
     * @version  
     * @since    Ver 1.1
     * @Date	 2011	2012-03-16		17:04
     *
     * @see 	 
     */
    public class EEPROMActivity extends Activity {
    	public static final int MSG_UPDATE_UI = 0;
    	public static final int MSG_GET_DATA = 1;
    
    	/*读写按钮和读写输入框*/
    	private Button mButtonWrite = null;
    	private Button mButtonRead = null;
    	private EditText mEditTextWrite = null;
    	private EditText mEditTextRead = null;
    
    	private Editable mEditable = null;
    
    	/*读写模块*/
    	private WriteEEPROM mWriteEEPROM = null;
    	private ReadEEPROM mReadEEPROM = null;
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		requestWindowFeature(Window.FEATURE_PROGRESS);  
    		setContentView(R.layout.eepromdemo);
    		setProgressBarVisibility(true);
    
    		initUI();
    		initData();
    
    	}
    
    
    	/**
    	 * 
    	 * initUI: 初始化UI
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void initUI(){
    		mButtonWrite = (Button)findViewById(R.id.Button_write);
    		mButtonRead =  (Button)findViewById(R.id.Button_read);
    
    		mButtonWrite.setOnClickListener(mClickListener);
    		mButtonRead.setOnClickListener(mClickListener);
    
    		mEditTextWrite = (EditText)findViewById(R.id.EditText_write);
    		mEditTextRead = (EditText)findViewById(R.id.EditText_read);
    
    		mEditable = mEditTextRead.getText();
    	}
    
    
    	/**
    	 * 
    	 * initData:新建读写模块，准备读写数据
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void initData(){
    		mWriteEEPROM = new WriteEEPROM(mHandler);
    		mReadEEPROM = new ReadEEPROM(mHandler);
    	}
    
    
    	private Handler mHandler = new Handler(){
    
    		@Override
    		public void handleMessage(Message msg) {
    			switch (msg.what) {
    			case MSG_UPDATE_UI:
    				int pos = (int)msg.arg1;
    				int length = (int)msg.arg2;
    				setProgress(pos*10000/(length -1));
    				break;
    			case MSG_GET_DATA:
    				Byte dataByte = (Byte)msg.obj;
    				mEditable.append((char)dataByte.byteValue());
    				mEditTextRead.setText(mEditable);
    				break;
    			default:
    				break;
    			}
    		}
    	};
    
    
    	private Button.OnClickListener mClickListener = new Button.OnClickListener(){
    
    		public void onClick(View v) {
    			Button mButton = (Button)v;
    
    			switch (mButton.getId()) {
    			case R.id.Button_read:
    				ReadDataIntoEEPROM();
    				break;
    			case R.id.Button_write:
    				WriteDataIntoEEPROM();
    				break;
    			default:
    				break;
    			}
    
    		}
    
    	};
    
    
    	/**
    	 * 
    	 * WriteDataIntoEEPROM:取出mEditTextWrite输入框中的数据，转换成byte数组，启用写模块写入EEPROM
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void WriteDataIntoEEPROM(){
    		byte[] data = mEditTextWrite.getText().toString().getBytes();
    
    		if(mWriteEEPROM != null)
    			mWriteEEPROM.WriteData(data);
    	}
    
    	/**
    	 * 
    	 * ReadDataIntoEEPROM:启用读模块从EEPROM读取数据
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void ReadDataIntoEEPROM(){
    		mEditable.clear();
    		if(mReadEEPROM != null)
    			mReadEEPROM.ReadData();
    	}
    
    	@Override
    	protected void onDestroy() {
    		super.onDestroy();
    	}
    
    
    }

WriteEEPROM.java

package com.mini6410.EEPROM;
    
    import android.os.Handler;
    import android.util.Log;
    
    import com.friendlyarm.AndroidSDK.HardwareControler;
    
    public class WriteEEPROM{
    	private static final String TAG = "WriteEEPROM";
    
    	private static final int MAX_LENGTH = 256; //EEPROM最多可存储256个字节数据
    
    	Handler mHandler = null;
    
    	byte[] mData = null;
    
    	private WriteEEPROMThread mWriteEEPROMThread = null;
    
    	public WriteEEPROM(Handler mHandler){
    		this.mHandler = mHandler;
    	}
    
    
    	/**
    	 * 
    	 * WriteData: 新建并启动写线程将数据逐个字节写入EEPROM
    	 *
    	 * @param   data byte数组
    	 * @return     
    	 * @throws 
    	 */
    	public void WriteData(byte[] data){
    		mData = data;
    
    		safeStop();
    
    		mWriteEEPROMThread = new WriteEEPROMThread();
    		mWriteEEPROMThread.start();
    	}
    
    	/**
    	 * 
    	 * safeStop: 安全停止线程
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void safeStop(){
    		if(mWriteEEPROMThread != null && mWriteEEPROMThread.isAlive()){
    			mWriteEEPROMThread.interrupt();
    			mWriteEEPROMThread.stop = true;
    			try {
    				mWriteEEPROMThread.join();
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
    		}
    		mWriteEEPROMThread = null;
    	}
    
    	public void sendMessage(int what ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what));
    		}	
    	}
    
    	public void sendMessage(int what, Object obj ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what, obj));
    		}
    	}
    
    	public void sendMessage(int what, int arg1,int arg2,Object obj ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what,arg1,arg2,obj));
    		}
    	}
    
    
    	public void sendMessage(int what, int arg1,int arg2 ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what,arg1,arg2));
    		}
    	}
    
    	/**
    	 * 
    	 * WriteEEPROMThread: 数据写入线程
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	private class WriteEEPROMThread extends Thread{
    		volatile boolean stop = false;
    
    		int fd = 0; 
    		int length = 0;
    		int pos = 0;
    
    		@Override
    		public void run() {
    
    			if(mData == null){
    				Log.e(TAG, "There is No Data!");
    
    				stop = true;
    			}
    
    			/*打开设备*/
    			fd = HardwareControler.openI2CDevice();
    
    			if(fd == -1)
    			{
    				Log.e(TAG, "Failed to open the I2CDevice !");
    
    				stop = true;
    			}
    
    
    			length = mData.length;
    
    			if (length > MAX_LENGTH) {
    				length = MAX_LENGTH;
    			}
    
    			//擦除并初始化EEPROM
    			for(int i = 0 ; i < MAX_LENGTH; i++){
    				HardwareControler.writeByteDataToI2C(fd, i, (byte)'\0');
    			}
    
    			while(!stop){
    
    				if (pos >= length) {
    					break;
    				}
    
    				/*写入数据，每次只能读取一个字节。*/
    				HardwareControler.writeByteDataToI2C(fd, pos, mData[pos]);
    
    				sendMessage(EEPROMActivity.MSG_UPDATE_UI, pos,length);
    
    				Log.i(TAG, "writeByteDataToI2C pos: "+ pos);
    
    				pos++;
    
    				//				try {
    				//					Thread.sleep(10);
    				//				} catch ( InterruptedException e ) {
    				//					e.printStackTrace();
    				//				}
    
    			}
    
    			if(fd != -1)
    			{
    				/*关闭设备*/
    				HardwareControler.close(fd);
    			}
    
    		}
    	}
    }

ReadEEPROM.java

package com.mini6410.EEPROM;
    
    import android.os.Handler;
    import android.util.Log;
    
    import com.friendlyarm.AndroidSDK.HardwareControler;
    
    public class ReadEEPROM{
    	private static final String TAG = "ReadEEPROM";
    
    	private static final int MAX_LENGTH = 256; //EEPROM最多可存储256个字节数据
    
    	Handler mHandler = null;
    
    	private ReadEEPROMThread mReadEEPROMThread = null;
    
    	public ReadEEPROM(Handler mHandler){
    		this.mHandler = mHandler;
    	}
    
    	/**
    	 * 
    	 * ReadData: 新建并启动读线程从EEPROM中逐个读取数据
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void ReadData(){
    		safeStop();
    
    		mReadEEPROMThread = new ReadEEPROMThread();
    		mReadEEPROMThread.start();
    	}
    
    	/**
    	 * 
    	 * safeStop: 安全停止线程
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	public void safeStop(){
    		if(mReadEEPROMThread != null && mReadEEPROMThread.isAlive()){
    			mReadEEPROMThread.interrupt();
    			mReadEEPROMThread.stop = true;
    			try {
    				mReadEEPROMThread.join();
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
    		}
    		mReadEEPROMThread = null;
    	}
    
    	public void sendMessage(int what ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what));
    		}	
    	}
    
    	public void sendMessage(int what, Object obj ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what, obj));
    		}
    	}
    
    	public void sendMessage(int what, int arg1,int arg2,Object obj ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what,arg1,arg2,obj));
    		}
    	}
    
    	
    	public void sendMessage(int what, int arg1,int arg2 ){
    		if(mHandler != null){
    			mHandler.sendMessage(mHandler.obtainMessage(what,arg1,arg2));
    		}
    	}
    	
    	/**
    	 * 
    	 * ReadEEPROMThread: 数据读取线程
    	 *
    	 * @param   
    	 * @return     
    	 * @throws 
    	 */
    	private class ReadEEPROMThread extends Thread{
    		volatile boolean stop = false;
    
    		int fd = 0; 
    		int length = 0;
    		int pos = 0;
    		byte data = 0;
    
    		@Override
    		public void run() {
    
    			/*打开设备*/
    			fd = HardwareControler.openI2CDevice();
    
    			if(fd == -1)
    			{
    				Log.e(TAG, "Failed to open the I2CDevice !");
    
    				stop = true;
    			}
    
    			length = MAX_LENGTH;
    
    			while(!stop){
    			
    				if (pos >= length) {
    					break;
    				}
    				
    				/*读取数据，每次只能读取一个字节。*/
    				data = (byte)HardwareControler.readByteDataFromI2C(fd, pos);
    				
    				if(data != -1)
    				{
    					sendMessage(EEPROMActivity.MSG_GET_DATA, data);
    					sendMessage(EEPROMActivity.MSG_UPDATE_UI, pos,length);
    				}
    		
    				Log.i(TAG, "readByteDataFromI2C pos: "+ pos);
    				
    				pos++;
    
    //				try {
    //					Thread.sleep(10);
    //				} catch ( InterruptedException e ) {
    //					e.printStackTrace();
    //				}
    
    			}
    
    			if(fd != -1)
    			{
    				/*关闭设备*/
    				HardwareControler.close(fd);
    			}
    		}
    	}
    }

eepromdemo.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
    
        <LinearLayout
            android:id="@+id/eeprom"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="horizontal" >
    
            <LinearLayout
                android:id="@+id/writemodel"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_weight="1"
                android:orientation="vertical" >
    
                <Button
                    android:id="@+id/Button_write"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/writeeeprom" />
    
                <EditText
                    android:id="@+id/EditText_write"
                    android:layout_width="fill_parent"
                    android:layout_height="100dip"
                    android:text="@string/dataeeprom" />
            </LinearLayout>
    
            <LinearLayout
                android:id="@+id/readmodel"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_weight="1"
                android:orientation="vertical" >
    
                <Button
                    android:id="@+id/Button_read"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/readeeprom" />
    
                <EditText
                    android:id="@+id/EditText_read"
                    android:layout_width="fill_parent"
                    android:layout_height="100dip" />
            </LinearLayout>
        </LinearLayout>
    
    </LinearLayout>

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