04949080
 pfrison
PercTeacher stabl...
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import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import gnu.io.CommPortIdentifier;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
import gnu.io.UnsupportedCommOperationException;
public class SerialCom {
private static final int DATA_RATE = 9600;
private static final int TIME_OUT = 2000;
private static final int BUFFER_SIZE = 1024;
private SerialPort serialPort;
private InputStream input;
private OutputStream output;
public SerialCom(int portNumberWindows) { this("COM" + String.valueOf(portNumberWindows)); }
public SerialCom(String portName) {
CommPortIdentifier portId = null;
Enumeration<?> portEnum = CommPortIdentifier.getPortIdentifiers();
// Search for serial port
while (portEnum.hasMoreElements()) {
CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
if (currPortId.getName().equals(portName)) {
portId = currPortId;
break;
}
}
if (portId == null)
throw new SerialComPortException(portName);
// open connection
try {
serialPort = (SerialPort) portId.open(this.getClass().getName(), TIME_OUT);
serialPort.setSerialPortParams(DATA_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
input = serialPort.getInputStream();
output = serialPort.getOutputStream();
} catch (IOException
| UnsupportedCommOperationException
| PortInUseException e) {
throw new SerialComPortException(portName);
}
}
public void close() {
try {
input.close();
output.close();
} catch (IOException e) {
e.printStackTrace();
}
serialPort.removeEventListener();
serialPort.close();
}
public void send(byte[] bytes) {
try {
this.output.write(bytes);
} catch (IOException e) {
e.printStackTrace();
}
}
public byte[] recieve() {
byte[] buffer = new byte[BUFFER_SIZE];
int len = -1;
try { len = this.input.read(buffer); }
catch (IOException e) { return null; }
if(len == -1 || len == 0)
return null;
byte[] data = new byte[len];
for(int i=0; i<len; i++)
data[i] = buffer[i];
return data;
}
}
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