早上好，
我在 Windows 7 64 位上使用/或安装 rxtx 时遇到问题。我以前在 x86 win XP 系统上使用过它，没有任何问题。由于出于某种原因重新安装到这个新系统，rxtx 无法找到任何端口。我已经尝试了 rxtx 安装，Cloud Hopper 的 64 位本机库并删除所有 rxtx 文件并从头开始。找到了 RXTXcomm.jar，我可以浏览 NetBeans 中的包，但实现似乎已损坏或找不到。
每次执行时，此行都会失败：
comPort = "COM1";
portId = CommPortIdentifier.getPortIdentifier(comPort);
并抛出 NoSuchPortException。
使用它列出串行端口不会产生任何结果。
Enumeration ports = CommPortIdentifier.getPortIdentifiers();
String portArray[] = null;
while (ports.hasMoreElements()) {
CommPortIdentifier port = (CommPortIdentifier) ports.nextElement();
System.out.println(port.getName());
}
我已经检查了串行端口是否可用，所以此时我想知道本机库是否只是为 Windows 7 64 位而损坏。
有人在windows 7 64位下成功使用RXTX 2.2pre2吗？
构造函数中的违规代码部分：
public SerialControl(String name, String comPort, int baudrate, int databits, String parity, double stopbits) throws Exception {
int stop = 0;
int data = 0;
int par = 0;
this.name=name;
// Sanity checks and interpretation
if (baudrate > 115200 || baudrate < 300) {
System.err.println(name+": constructor(): Invalid baudrate "+baudrate);
throw new Exception("Invalid baudrate, " + baudrate);
}
if (databits >= 5 && databits <= 8) {
switch (databits) {
case 5:
data = SerialPort.DATABITS_5;
break;
case 6:
data = SerialPort.DATABITS_6;
break;
case 7:
data = SerialPort.DATABITS_7;
break;
case 8:
data = SerialPort.DATABITS_8;
break;
default:
System.err.println(name+": constructor(): Invalid data bits, switched " + databits);
throw new Exception("Invalid data bits, switched " + databits);
}
} else {
throw new Exception("Invalid data bits=" + databits);
}
if (stopbits >= 1.0 && stopbits <= 2.0) {
if (stopbits == 1.0) {
stop = SerialPort.STOPBITS_1;
} else if (stopbits == 1.5) {
stop = SerialPort.STOPBITS_1_5;
} else if (stopbits == 2.0) {
stop = SerialPort.STOPBITS_2;
} else {
System.err.println(name+": constructor(): Invalid stop bits, switched " + stopbits);
throw new Exception("Invalid stop bits, switched " + stopbits);
}
} else {
System.err.println(name+": constructor(): Invalid stop bits, switched " + stopbits);
throw new Exception("Invalid stop bits " + stopbits);
}
switch (parity) {
case "S":
par = SerialPort.PARITY_SPACE;
break;
case "E":
par = SerialPort.PARITY_EVEN;
break;
case "M":
par = SerialPort.PARITY_MARK;
break;
case "O":
par = SerialPort.PARITY_ODD;
break;
case "N":
par = SerialPort.PARITY_NONE;
break;
default:
System.err.println(name+": constructor(): Invalid parity, switched " + parity);
throw new Exception("Invalid parity, switched " + parity);
}
// Inits
// Try to find the port specified
try {
portId = CommPortIdentifier.getPortIdentifier(comPort);
} catch (Exception e) {
System.err.println(name+": constructor(): No such port \"" + comPort+"\"");
e.printStackTrace();
throw e;
}
// Open the port
try {
serialPort = (SerialPort) portId.open("User Port", 2000);
} catch (PortInUseException e) {
System.err.println(name+": constructor(): Could not open port " + comPort);
throw e;
}
// Grab the input stream
try {
inputStream = serialPort.getInputStream();
} catch (IOException e) {
System.err.println(name+": constructor(): Could not get input stream for " + comPort);
throw e;
}
// Set the serial port parameters, no flow control
try {
serialPort.setSerialPortParams(baudrate, data, stop, par);
serialPort.setDTR(false);
serialPort.setRTS(false);
} catch (UnsupportedCommOperationException e) {
System.err.println(name+": constructor(): Error initializing " + comPort);
throw e;
}
}
