public void open() throws IOException {
try {
if (portName != null) {
portId = CommPortIdentifier.getPortIdentifier(portName);
}
if (portId == null) {
throw new IOException("Invalid port " + portName);
}
serialPort = (SerialPort) portId.open(portId.getName(), baudRate);
if (portId == null) {
throw new IOException("Invalid port " + portName);
}
serialPort.setSerialPortParams(
baudRate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
serialPort.notifyOnOutputEmpty(true);
outputStream = serialPort.getOutputStream();
inputStream = serialPort.getInputStream();
Logger.getLogger(SerialDevice.class.getName())
.log(Level.INFO, "Connection Stabilished with {0}", serialPort.getName());
} catch (Exception e) {
e.printStackTrace();
Logger.getLogger(SerialDevice.class.getName())
.log(Level.SEVERE, "Could not init the device on " + serialPort.getName(), e);
serialPort.close();
}
}
public void write(final String pMessageString) {
System.out.println("\n>>> \"" + pMessageString + "\" to " + serialPort.getName());
try {
out.write(pMessageString.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Pulses the DTR on the given serial port.
*
* @param serialPort The port on which to pulse the DTR.
* @throws IOException If an IO error occurs during the pulse.
*/
private final void pulseDTR(final SerialPort serialPort) throws IOException {
if (logger.isLoggable(Level.INFO)) {
logger.log(Level.INFO, "Pulsing the DTR on serial port [" + serialPort.getName() + "]");
}
serialPort.setDTR(true);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// Eat.
if (logger.isLoggable(Level.WARNING)) {
logger.log(
Level.WARNING,
"Was interrupted while pulsing the DTR of port [" + serialPort.getName() + "]",
e);
}
}
serialPort.setDTR(false);
}
// disconnect the serial port
// pre: an open serial port
// post: clsoed serial port
public void disconnect() {
// close the serial port
try {
// writeData(0, 0);
serialPort.removeEventListener();
serialPort.close();
input.close();
output.close();
setConnected(false);
logText = "Disconnected.";
System.out.println(logText + "\n");
} catch (Exception e) {
logText = "Failed to close " + serialPort.getName() + "(" + e.toString() + ")";
System.out.println(logText + "\n");
}
}
@Override
public void close() throws IOException {
Logger.getLogger(SerialDevice.class.getName())
.log(Level.INFO, "Closing device on {0}", serialPort.getName());
// send("X");
connected = false;
try {
inputStream.close();
} catch (Exception e) {
}
try {
outputStream.close();
} catch (Exception e) {
}
try {
if (serialPort != null) {
serialPort.close();
}
} catch (Exception e) {
}
}
void connect(String portName) throws Exception {
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
if (portIdentifier.isCurrentlyOwned()) {
System.out.println("Error: Port is currently in use");
} else {
CommPort commPort = portIdentifier.open(this.getClass().getName(), 2000);
if (commPort instanceof SerialPort) {
SerialPort serialPort = (SerialPort) commPort;
serialPort.setSerialPortParams(
57600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
InputStream in = serialPort.getInputStream();
out = serialPort.getOutputStream();
(new Thread(new SerialReader(in))).start();
// (new Thread(new SerialWriter(out))).start();
// new SerialWriter(out).run();
System.out.println("CommPort : " + serialPort.getName() + " is open");
} else {
System.out.println("Error: Only serial ports are handled by this example.");
}
}
}
/**
* python example def transmit_to_widget(label, data, data_size): ser.write(chr(SOM_VALUE))
* ser.write(chr(label)) ser.write(chr(data_size & 0xFF)) // lsb ser.write(chr((data_size >> 8) &
* 0xFF)) // msb for j in range(data_size): ser.write(data[j]) ser.write(chr(EOM_VALUE))
*/
private void write() {
char som = 0x7E;
char eom = 0xE7;
char label = 6; // 10 serial , 6 send
Integer[] chan = getChannelData();
int data_size = chan.length;
char clsb = (char) (data_size & 0xFF);
char cmsb = (char) ((data_size >> 8) & 0xFF);
byte lsb = (byte) clsb;
byte msb = (byte) cmsb;
ArrayList<Byte> ab = new ArrayList<Byte>();
ab.add((byte) som); // start delimter
ab.add((byte) label); // label - whats happening
ab.add(lsb); // start byte
ab.add(msb); // mast
for (int i = 0; i < data_size; i++) {
ab.add(chan[i].byteValue());
}
ab.add((byte) eom);
// Byte[] messageString = new Byte[ab.size()];
// messageString = ab.toArray(messageString);
byte[] messageString = new byte[ab.size()];
for (int i = 0; i < ab.size(); i++) {
messageString[i] = ab.get(i);
}
// debug in hex
debugBytes(messageString);
boolean portFound = false;
String defaultPort = "/dev/ttyUSB0";
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals(defaultPort)) {
System.out.println("Found port " + defaultPort);
portFound = true;
try {
serialPort = (SerialPort) portId.open("SimpleWrite", 2000);
} catch (PortInUseException e) {
System.out.println("Port in use.");
e.printStackTrace();
continue;
}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
try {
serialPort.setSerialPortParams(
57600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {
e.printStackTrace();
}
try {
serialPort.notifyOnOutputEmpty(true);
} catch (Exception e) {
System.out.println("Error setting event notification");
System.out.println(e.toString());
e.printStackTrace();
System.exit(-1);
}
System.out.println("Writing \"" + messageString + "\" to " + serialPort.getName());
try {
outputStream.write(messageString);
} catch (IOException e) {
e.printStackTrace();
}
try {
Thread.sleep(2000); // Be sure data is xferred before closing
} catch (Exception e) {
e.printStackTrace();
}
serialPort.close();
System.exit(1);
}
}
}
if (!portFound) {
System.out.println("port " + defaultPort + " not found.");
}
}