用Java读取串口的程序,
这个简单的程序包括以下文件: IMU.java (主程序) ReadBuffer.java (从缓冲区读取一个消息) ReadSerial.java (读取串口数据并放入缓冲区) SerialBuffer.java (缓冲区) WriteSerial.java (不断的往串口送星号'*') 测试程序: SendCom.java (将一个数据文件往串口发送) SEND.TXT (供测试用的数据文件) 在这个通讯程序中使用了一个简单的协议,既不同的消息之间用星号'*'作为分隔。这个程序中的问题是ReadSerial进程和WriteSerial进程不能够同时启动,出错信息是不能够打开串口,因为同样一个串口不能够同时被打开两次(在ReadSerial中声明了FileReader 测试程序: SendCom.java (将一个数据文件往串口发送) SEND.TXT (供测试用的数据文件) 在这个通讯程序中使用了一个简单的协议,既不同的消息之间用星号'*'作为分隔。这个程序中的问题是ReadSerial进程和WriteSerial进程不能够同时启动,出错信息是不能够打开串口,因为同样一个串口不能够同时被打开两次(在ReadSerial中声明了FileReader和在WriteSerial中声明了FileWriter)。这样是不能够实现全双工通讯的。不知道有没有做过的大侠能够讲讲处理的办法。import java.io.*;
class IMU
{
public static void main(String[] args)
{
//TO DO: Add your JAVA codes here
File ComPort = new File("COM1");
SerialBuffer SB = new SerialBuffer();
ReadSerial r1 = new ReadSerial(SB, ComPort);
ReadBuffer r2 = new ReadBuffer(SB);
WriteSerial r3 = new WriteSerial(ComPort);
r1.start();
r2.start();
r3.start();
}
}
import java.io.*;
public class ReadBuffer extends Thread
{
private SerialBuffer ComBuffer;
public ReadBuffer(SerialBuffer SB)
{
ComBuffer = SB;
}
public void run()
{
String Msg;
while (true)
{
Msg = ComBuffer.GetMsg();
System.out.println(Msg);
}
}
}
import java.io.*;
public class ReadSerial extends Thread
{
private SerialBuffer ComBuffer;
private File ComPort;
public ReadSerial(SerialBuffer SB, File Port)
{
ComBuffer = SB;
ComPort = Port;
}
public void run()
{
int c;
try
{
FileReader in = new FileReader(ComPort);
while (true)
{
c = in.read();
ComBuffer.PutChar(c);
}
try
{
FileReader in = new FileReader(ComPort);
while (true)
{
c = in.read();
ComBuffer.PutChar(c);
}
} catch (IOException e) {}
}
}public class SerialBuffer
{
private String Content = "";
private String CurrentMsg, TempContent;
private boolean available = false; public synchronized String GetMsg()
{
int SepMark;
if ((SepMark = Content.indexOf('*')) == -1)
{
available = false;
while (available == false)
{
try
{
wait();
} catch (InterruptedException e) { }
}
SepMark = Content.indexOf('*');
}
CurrentMsg = Content.substring(0, SepMark);
TempContent = Content.substring(SepMark+1);
Content = TempContent;
notifyAll();
return CurrentMsg;
}
public synchronized void PutChar(int c)
{
Character d = new Character((char) c);
Content = Content.concat(d.toString());
if (c == '*')
{
available = true;
}
notifyAll();
}
}import java.io.*;
public class WriteSerial extends Thread
{
private SerialBuffer ComBuffer;
private File ComPort;
public WriteSerial(File Port)
{
ComPort = Port;
}
public void run()
{
int c;
try
{
FileWriter out = new FileWriter(ComPort);
while (true)
{
out.write('*');
}
} catch (IOException e)
{
System.out.println(e.getMessage());
}
}
}import java.io.*;
public class SendCom
{
public static void main(String[] args)
{
File OutFile = new File("SEND.TXT");
File ComPort = new File("COM2");
int c;
try
{
FileReader in = new FileReader(OutFile);
FileWriter out = new FileWriter(ComPort);
while ((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
} catch (IOException e) {}
}
}
这个简单的程序包括以下文件: IMU.java (主程序) ReadBuffer.java (从缓冲区读取一个消息) ReadSerial.java (读取串口数据并放入缓冲区) SerialBuffer.java (缓冲区) WriteSerial.java (不断的往串口送星号'*') 测试程序: SendCom.java (将一个数据文件往串口发送) SEND.TXT (供测试用的数据文件) 在这个通讯程序中使用了一个简单的协议,既不同的消息之间用星号'*'作为分隔。这个程序中的问题是ReadSerial进程和WriteSerial进程不能够同时启动,出错信息是不能够打开串口,因为同样一个串口不能够同时被打开两次(在ReadSerial中声明了FileReader 测试程序: SendCom.java (将一个数据文件往串口发送) SEND.TXT (供测试用的数据文件) 在这个通讯程序中使用了一个简单的协议,既不同的消息之间用星号'*'作为分隔。这个程序中的问题是ReadSerial进程和WriteSerial进程不能够同时启动,出错信息是不能够打开串口,因为同样一个串口不能够同时被打开两次(在ReadSerial中声明了FileReader和在WriteSerial中声明了FileWriter)。这样是不能够实现全双工通讯的。不知道有没有做过的大侠能够讲讲处理的办法。import java.io.*;
class IMU
{
public static void main(String[] args)
{
//TO DO: Add your JAVA codes here
File ComPort = new File("COM1");
SerialBuffer SB = new SerialBuffer();
ReadSerial r1 = new ReadSerial(SB, ComPort);
ReadBuffer r2 = new ReadBuffer(SB);
WriteSerial r3 = new WriteSerial(ComPort);
r1.start();
r2.start();
r3.start();
}
}
import java.io.*;
public class ReadBuffer extends Thread
{
private SerialBuffer ComBuffer;
public ReadBuffer(SerialBuffer SB)
{
ComBuffer = SB;
}
public void run()
{
String Msg;
while (true)
{
Msg = ComBuffer.GetMsg();
System.out.println(Msg);
}
}
}
import java.io.*;
public class ReadSerial extends Thread
{
private SerialBuffer ComBuffer;
private File ComPort;
public ReadSerial(SerialBuffer SB, File Port)
{
ComBuffer = SB;
ComPort = Port;
}
public void run()
{
int c;
try
{
FileReader in = new FileReader(ComPort);
while (true)
{
c = in.read();
ComBuffer.PutChar(c);
}
try
{
FileReader in = new FileReader(ComPort);
while (true)
{
c = in.read();
ComBuffer.PutChar(c);
}
} catch (IOException e) {}
}
}public class SerialBuffer
{
private String Content = "";
private String CurrentMsg, TempContent;
private boolean available = false; public synchronized String GetMsg()
{
int SepMark;
if ((SepMark = Content.indexOf('*')) == -1)
{
available = false;
while (available == false)
{
try
{
wait();
} catch (InterruptedException e) { }
}
SepMark = Content.indexOf('*');
}
CurrentMsg = Content.substring(0, SepMark);
TempContent = Content.substring(SepMark+1);
Content = TempContent;
notifyAll();
return CurrentMsg;
}
public synchronized void PutChar(int c)
{
Character d = new Character((char) c);
Content = Content.concat(d.toString());
if (c == '*')
{
available = true;
}
notifyAll();
}
}import java.io.*;
public class WriteSerial extends Thread
{
private SerialBuffer ComBuffer;
private File ComPort;
public WriteSerial(File Port)
{
ComPort = Port;
}
public void run()
{
int c;
try
{
FileWriter out = new FileWriter(ComPort);
while (true)
{
out.write('*');
}
} catch (IOException e)
{
System.out.println(e.getMessage());
}
}
}import java.io.*;
public class SendCom
{
public static void main(String[] args)
{
File OutFile = new File("SEND.TXT");
File ComPort = new File("COM2");
int c;
try
{
FileReader in = new FileReader(OutFile);
FileWriter out = new FileWriter(ComPort);
while ((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
} catch (IOException e) {}
}
}
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货