javax.comm.commport.html

java串口通讯api

 public abstract OutputStream getOutputStream() throws IOException
</pre>
<dl>
  <dd> Returns an output stream. This is the only way to send data
 to the communications port. If the port is unidirectional
 and doesn't support sending data, then <CODE>getOutputStream</CODE>
 returns null.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> OutputStream object that can be used to write to the port
    <dt> <b>Throws:</b> IOException
    <dd> if an I/O error occurred
  </dl></dd>
</dl>
<a name="close()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="close"><b>close</b></a>
<pre>
 public void close()
</pre>
<dl>
  <dd> Closes the communications port.
 The application must call <CODE>close</CODE> when it is done with the port.
 Notification of this ownership change will be propagated to all classes
 registered using <CODE>addPortOwnershipListener</CODE>.
<p>
</dl>
<a name="enableReceiveThreshold(int)"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="enableReceiveThreshold"><b>enableReceiveThreshold</b></a>
<pre>
 public abstract void enableReceiveThreshold(int thresh) throws <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
</pre>
<dl>
  <dd> Enables receive threshold, if this feature is supported by the driver.
 When the receive threshold condition becomes true, a <CODE>read</CODE>
 from the input stream for this port will return immediately.
 <P>
 <CODE>enableReceiveThreshold</CODE> is an advisory method which the driver
 may not implement. By default, receive threshold is not enabled.
 <P>
 An application can determine whether the driver supports this feature
 by first calling the <CODE>enableReceiveThreshold</CODE> method and then
 calling the <CODE>isReceiveThresholdEnabled</CODE> method. If
 <CODE>isReceiveThresholdEnabled</CODE> still returns false, then receive
 threshold is not supported by the driver. If the driver does not implement
 this feature, it will return from blocking reads at an appropriate time.
<p>
  <dd><dl>
    <dt> <b>Parameters:</b>
    <dd> thresh - when this many bytes are in the input buffer, return
		immediately from <CODE>read</CODE>.
<P>
    <dt> <b>Throws:</b> <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
    <dd> is thrown if receive
			threshold is not supported by the underline driver.
  </dl></dd>
</dl>
<a name="disableReceiveThreshold()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="disableReceiveThreshold"><b>disableReceiveThreshold</b></a>
<pre>
 public abstract void disableReceiveThreshold()
</pre>
<dl>
  <dd> Disables receive threshold.
<p>
</dl>
<a name="isReceiveThresholdEnabled()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="isReceiveThresholdEnabled"><b>isReceiveThresholdEnabled</b></a>
<pre>
 public abstract boolean isReceiveThresholdEnabled()
</pre>
<dl>
  <dd> Checks if receive threshold is enabled.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> boolean true if the driver supports receive threshold.
  </dl></dd>
</dl>
<a name="getReceiveThreshold()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="getReceiveThreshold"><b>getReceiveThreshold</b></a>
<pre>
 public abstract int getReceiveThreshold()
</pre>
<dl>
  <dd> Gets the integer value of the receive threshold. If the receive threshold
 is disabled or not supported by the driver, then the value returned
 is meaningless.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> number of bytes for receive threshold
  </dl></dd>
</dl>
<a name="enableReceiveTimeout(int)"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="enableReceiveTimeout"><b>enableReceiveTimeout</b></a>
<pre>
 public abstract void enableReceiveTimeout(int rcvTimeout) throws <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
</pre>
<dl>
  <dd> Enables receive timeout, if this feature is supported by the driver.
 When the receive timeout condition becomes true, a <CODE>read</CODE>
 from the input stream for this port will return immediately.
 <P>
 <CODE>enableReceiveTimeout</CODE> is an advisory method which the driver
 may not implement. By default, receive timeout is not enabled.
 <P>
 An application can determine whether the driver supports this feature
 by first calling the <CODE>enableReceiveTimeout</CODE> method and then
 calling the <CODE>isReceiveTimeout</CODE> method. If
 <CODE>isReceiveTimeout</CODE> still returns false, then receive timeout
 is not supported by the driver.
<p>
  <dd><dl>
    <dt> <b>Parameters:</b>
    <dd> rcvTimeout - when this many milliseconds have elapsed, return
		immediately from <CODE>read</CODE>, regardless of bytes in
		input buffer.
 <P>
    <dt> <b>Throws:</b> <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
    <dd> is thrown if receive
			timeout is not supported by the underline driver.
  </dl></dd>
</dl>
<a name="disableReceiveTimeout()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="disableReceiveTimeout"><b>disableReceiveTimeout</b></a>
<pre>
 public abstract void disableReceiveTimeout()
</pre>
<dl>
  <dd> Disables receive timeout.
<p>
</dl>
<a name="isReceiveTimeoutEnabled()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="isReceiveTimeoutEnabled"><b>isReceiveTimeoutEnabled</b></a>
<pre>
 public abstract boolean isReceiveTimeoutEnabled()
</pre>
<dl>
  <dd> Checks if receive timeout is enabled.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> boolean true if the driver supports receive timeout.
  </dl></dd>
</dl>
<a name="getReceiveTimeout()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="getReceiveTimeout"><b>getReceiveTimeout</b></a>
<pre>
 public abstract int getReceiveTimeout()
</pre>
<dl>
  <dd> Gets the integer value of the receive timeout. If the receive timeout
 is disabled or not supported by the driver, then the value returned
 is meaningless.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> number of milliseconds in receive timeout
  </dl></dd>
</dl>
<a name="enableReceiveFraming(int)"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="enableReceiveFraming"><b>enableReceiveFraming</b></a>
<pre>
 public abstract void enableReceiveFraming(int framingByte) throws <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
</pre>
<dl>
  <dd> Enables receive framing, if this feature is supported by the driver.
 When the receive framing condition becomes true, a <CODE>read</CODE>
 from the input stream for this port will return immediately.
 <P>
 <CODE>enableReceiveFraming</CODE> is an advisory method which the driver
 may not implement. By default, receive framing is not enabled.
 <P>
 An application can determine whether the driver supports this feature
 by first calling the <CODE>enableReceiveFraming</CODE> method and then
 calling the <CODE>isReceiveFramingEnabled</CODE> method. If
 <CODE>isReceiveFramingEnabled</CODE> still returns false, then receive
 framing is not supported by the driver.
<p>
  <dd><dl>
    <dt> <b>Parameters:</b>
    <dd> framingByte - this byte in the input stream
		suggests the end of the received frame. Blocked reads
		will return immediately. Only the low 8 bits of <CODE>framingByte</CODE>
      are used while the upper 24 bits are masked off. A value outside the range
      of 0-255 will be converted to the value of its lowest 8 bits.
 <P>
    <dt> <b>Throws:</b> <a href="javax.comm.UnsupportedCommOperationException.html#_top_">UnsupportedCommOperationException</a>
    <dd> is thrown if receive
			timeout is not supported by the underline driver.
  </dl></dd>
</dl>
<a name="disableReceiveFraming()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="disableReceiveFraming"><b>disableReceiveFraming</b></a>
<pre>
 public abstract void disableReceiveFraming()
</pre>
<dl>
  <dd> Disables receive framing.
<p>
</dl>
<a name="isReceiveFramingEnabled()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="isReceiveFramingEnabled"><b>isReceiveFramingEnabled</b></a>
<pre>
 public abstract boolean isReceiveFramingEnabled()
</pre>
<dl>
  <dd> Checks if receive framing is enabled.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> boolean true if the driver supports receive framing.
  </dl></dd>
</dl>
<a name="getReceiveFramingByte()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="getReceiveFramingByte"><b>getReceiveFramingByte</b></a>
<pre>
 public abstract int getReceiveFramingByte()
</pre>
<dl>
  <dd> Gets the current byte used for receive framing. If the receive framing
 is disabled or not supported by the driver, then the value returned
 is meaningless. The return value of <CODE>getReceiveFramingByte</CODE>
 is an integer, the low 8 bits of which represent the current byte
 used for receive framing.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> integer current byte used for receive framing
  </dl></dd>
</dl>
<a name="setInputBufferSize(int)"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="setInputBufferSize"><b>setInputBufferSize</b></a>
<pre>
 public abstract void setInputBufferSize(int size)
</pre>
<dl>
  <dd> Sets the input buffer size.
 Note that this is advisory and memory availability may
 determine the ultimate buffer size used by the driver.
<p>
  <dd><dl>
    <dt> <b>Parameters:</b>
    <dd> size - size of the input buffer
  </dl></dd>
</dl>
<a name="getInputBufferSize()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="getInputBufferSize"><b>getInputBufferSize</b></a>
<pre>
 public abstract int getInputBufferSize()
</pre>
<dl>
  <dd> Gets the input buffer size.
 Note that this method is advisory and the underlying OS may choose
 not to report correct values for the buffer size.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> input buffer size currently in use
  </dl></dd>
</dl>
<a name="setOutputBufferSize(int)"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="setOutputBufferSize"><b>setOutputBufferSize</b></a>
<pre>
 public abstract void setOutputBufferSize(int size)
</pre>
<dl>
  <dd> Sets the output buffer size.
 Note that this is advisory and memory availability may
 determine the ultimate buffer size used by the driver.
<p>
  <dd><dl>
    <dt> <b>Parameters:</b>
    <dd> size - size of the output buffer
  </dl></dd>
</dl>
<a name="getOutputBufferSize()"><img src="images/red-ball.gif" width=12 height=12 alt=" o "></a>
<a name="getOutputBufferSize"><b>getOutputBufferSize</b></a>
<pre>
 public abstract int getOutputBufferSize()
</pre>
<dl>
  <dd> Gets the output buffer size.
 Note that this method is advisory and the underlying OS may choose
 not to report correct values for the buffer size.
<p>
  <dd><dl>
    <dt> <b>Returns:</b>
    <dd> output buffer size currently in use
  </dl></dd>
</dl>
<hr>
<pre>
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