CommPortpublic class CommPort extends Object
| Fields Summary |
|---|
| CommPortIdentifier | portId | | Enumeration | portList | | InputStream | inputStream | | OutputStream | outputStream | | SerialPort | serialPort | | static final int | MAXSIZE |
| Constructors Summary |
|---|
public CommPort(int portno, int baudrate, int data_bits, int stop_bits, int parity)
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) {}
|
| Methods Summary |
|---|
| public void | Init(int portno)
//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 void | close()
serialPort.close();
System.out.println("comm port closed");
| | public byte[] | serialReceive(int size)
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()
int bytesRead = 0;
byte[] readBuffer = new byte[MAXSIZE];
while (inputStream.available() > 0) {
bytesRead = inputStream.read(readBuffer);
}
return (bytesRead > 0) ? readBuffer: null;
| | public byte[] | serialReceiveInt()
return serialReceive(4);
| | public void | serialSend(int nBuf)
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);
| | public void | serialSend(byte[] buf, int length)
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");
}
}
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