// open a serial connection to a device. We won't know it's the robot until
public int OpenPort(String portName) {
if (portOpened && portName.equals(recentPort)) return 0;
ClosePort();
Log("<font color='green'>Connecting to " + portName + "...</font>\n");
// find the port
try {
portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
} catch (Exception e) {
Log("<span style='color:red'>Ports could not be identified:" + e.getMessage() + "</span>\n");
e.printStackTrace();
return 1;
}
if (portIdentifier.isCurrentlyOwned()) {
Log(
"<span style='color:red'>Error: Another program is currently using this port."
+ "</span>\n");
return 2;
}
// open the port
try {
commPort = portIdentifier.open("DrawbotGUI", 2000);
} catch (Exception e) {
Log("Port could not be opened:" + e.getMessage() + NL);
e.printStackTrace();
return 3;
}
if ((commPort instanceof SerialPort) == false) {
Log("<span style='color:red'>Only serial ports are handled by this example." + "</span>\n");
return 4;
}
// set the port parameters (like baud rate)
serialPort = (SerialPort) commPort;
try {
serialPort.setSerialPortParams(
BAUD_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
} catch (Exception e) {
Log("<span style='color:red'>Port could not be configured:" + e.getMessage() + "</span>\n");
return 5;
}
try {
in = serialPort.getInputStream();
out = serialPort.getOutputStream();
} catch (Exception e) {
Log("<span style='color:red'>Streams could not be opened:" + e.getMessage() + "</span>\n");
return 6;
}
try {
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
} catch (TooManyListenersException e) {
Log("<span style='color:red'>Streams could not be opened:" + e.getMessage() + "</span>\n");
return 7;
}
Log("<span style='green'>Opened.</span>\n");
SetRecentPort(portName);
portOpened = true;
UpdateMenuBar();
return 0;
}
