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 static Serial open(String defaultPort) {
boolean portFound = false;
final int mComPortIdentifier = CommPortIdentifier.PORT_SERIAL;
final Enumeration portList = CommPortIdentifier.getPortIdentifiers();
final int BAUD = 115200;
while (portList.hasMoreElements()) {
final CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement();
System.out.println("Found port id: " + portId);
if (portId.getPortType() == mComPortIdentifier) {
System.out.println("Found CommPortIdentifier.");
if (portId.getName().equals(defaultPort)) {
System.out.println("Found port " + defaultPort);
SerialPort serialPort;
OutputStream outputStream = null;
try {
serialPort = (SerialPort) portId.open("SimpleWrite", 2000);
} catch (PortInUseException e) {
System.out.println("Port in use.");
continue;
}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
try {
serialPort.setSerialPortParams(
BAUD, 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());
System.exit(-1);
}
return new Serial(serialPort, outputStream);
}
}
}
if (!portFound) {
System.out.println("port " + defaultPort + " not found.");
}
return null;
}
private void setNotifiers() {
serialPort.notifyOnDataAvailable(true);
serialPort.notifyOnOutputEmpty(true);
serialPort.notifyOnBreakInterrupt(true);
serialPort.notifyOnCarrierDetect(true);
serialPort.notifyOnCTS(true);
serialPort.notifyOnDSR(true);
serialPort.notifyOnFramingError(true);
serialPort.notifyOnOverrunError(true);
serialPort.notifyOnParityError(true);
serialPort.notifyOnRingIndicator(true);
}
/**
* 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.");
}
}