/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
import java.io.*;
import java.util.*;
import javax.comm.*;
public class CommPort {
CommPortIdentifier portId;
Enumeration portList;
InputStream inputStream;
OutputStream outputStream;
SerialPort serialPort;
static final int MAXSIZE=256;
public void Init(int portno) throws IOException {
//String portname = "COM" + portno;
//String portname = "/dev/term/a";
String portname = "/dev/ttyS" + portno;
System.out.println("Open " + portname);
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals(portname)) {
return;
}
}
}
throw(new IOException("Can't find port"));
}
public CommPort(int portno, int baudrate, int data_bits, int stop_bits,
int parity) throws IOException {
Init(portno);
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
} catch (PortInUseException e) {
System.out.println("Port is in use!");
throw (new IOException("Port in use"));
}
inputStream = serialPort.getInputStream();
outputStream = serialPort.getOutputStream();
try {
serialPort.setSerialPortParams(baudrate,
data_bits,
stop_bits,
parity);
serialPort.setInputBufferSize(1024);
} catch (UnsupportedCommOperationException e) {}
}
public void close() {
serialPort.close();
System.out.println("comm port closed");
}
public void serialSend(int nBuf) throws IOException {
byte[] buffer = new byte[4];
for(int i = 0; i < 4; i++) {
buffer[3 - i] = (byte)((nBuf >> 8*i) & 0xFF);
//buffer[i] = (byte)(nBuf >> 8 * i & 0xFF);
}
serialSend(buffer, 4);
}
// Second parameter viz. length is required because serialSend
// may not write all the parameters in the buffer to the serial port.
// This is especially true for reading from a socket when the number
// of bytes read are aften less that the actual number of bytes read.
public void serialSend(byte[] buf, int length) throws IOException {
for (int i = 0; i < length; i++) {
byte ch = buf[i];
try {
outputStream.write((int)(ch & 0xff));
} catch (IOException e) {
System.out.println("Error while sending");
}
}
}
public byte[] serialReceiveInt() throws IOException {
return serialReceive(4);
}
public byte[] serialReceive(int size) throws IOException {
int bytesRead = 0;
int offset = 0;
byte[] readBuffer = new byte[size];
while (bytesRead < size) {
bytesRead += inputStream.read(readBuffer, offset,
(size - bytesRead));
offset = bytesRead;
}
//System.out.println("bytesRead : " + bytesRead);
return (bytesRead > 0) ? readBuffer: null;
}
public byte[] serialReceive() throws IOException {
int bytesRead = 0;
byte[] readBuffer = new byte[MAXSIZE];
while (inputStream.available() > 0) {
bytesRead = inputStream.read(readBuffer);
}
return (bytesRead > 0) ? readBuffer: null;
}
}
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