android版RXTX源码

/*------------------------------------------------------------------------- | RXTX License v 2.1 - LGPL v 2.1 + Linking Over Controlled Interface. | RXTX is a native interface to serial ports in java. | Copyright 1997-2008 by Trent Jarvi tjarvi@qbang.org and others who | actually wrote it. See individual source files for more information. | | A copy of the LGPL v 2.1 may be found at | http://www.gnu.org/licenses/lgpl.txt on March 4th 2007. A copy is | here for your convenience. | | This library is free software; you can redistribute it and/or | modify it under the terms of the GNU Lesser General Public | License as published by the Free Software Foundation; either | version 2.1 of the License, or (at your option) any later version. | | This library is distributed in the hope that it will be useful, | but WITHOUT ANY WARRANTY; without even the implied warranty of | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | Lesser General Public License for more details. | | An executable that contains no derivative of any portion of RXTX, but | is designed to work with RXTX by being dynamically linked with it, | is considered a "work that uses the Library" subject to the terms and | conditions of the GNU Lesser General Public License. | | The following has been added to the RXTX License to remove | any confusion about linking to RXTX. We want to allow in part what | section 5, paragraph 2 of the LGPL does not permit in the special | case of linking over a controlled interface. The intent is to add a | Java Specification Request or standards body defined interface in the | future as another exception but one is not currently available. | | http://www.fsf.org/licenses/gpl-faq.html#LinkingOverControlledInterface | | As a special exception, the copyright holders of RXTX give you | permission to link RXTX with independent modules that communicate with | RXTX solely through the Sun Microsytems CommAPI interface version 2, | regardless of the license terms of these independent modules, and to copy | and distribute the resulting combined work under terms of your choice, | provided that every copy of the combined work is accompanied by a complete | copy of the source code of RXTX (the version of RXTX used to produce the | combined work), being distributed under the terms of the GNU Lesser General | Public License plus this exception. An independent module is a | module which is not derived from or based on RXTX. | | Note that people who make modified versions of RXTX are not obligated | to grant this special exception for their modified versions; it is | their choice whether to do so. The GNU Lesser General Public License | gives permission to release a modified version without this exception; this | exception also makes it possible to release a modified version which | carries forward this exception. | | You should have received a copy of the GNU Lesser General Public | License along with this library; if not, write to the Free | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | All trademarks belong to their respective owners. --------------------------------------------------------------------------*/ package gnu.io; import java.io.InputStream; import java.io.OutputStream; import java.io.IOException; import java.util.TooManyListenersException; import java.lang.Math; /** * An extension of gnu.io.SerialPort * @see gnu.io.SerialPort */ final public class RXTXPort extends SerialPort { /* I had a report that some JRE's complain when MonitorThread tries to access private variables */ protected final static boolean debug = false; protected final static boolean debug_read = false; protected final static boolean debug_read_results = false; protected final static boolean debug_write = false; protected final static boolean debug_events = false; protected final static boolean debug_verbose = false; private static Zystem z; static { try { z = new Zystem(); } catch ( Exception e ) {} if(debug ) z.reportln( "RXTXPort {}"); System.loadLibrary( "rxtxSerial" ); Initialize(); } /** Initialize the native library */ private native static void Initialize(); boolean MonitorThreadAlive=false; /** * Open the named port * @param name the name of the device to open * @throws PortInUseException * @see gnu.io.SerialPort */ public RXTXPort( String name ) throws PortInUseException { if (debug) z.reportln( "RXTXPort:RXTXPort("+name+") called"); /* commapi/javadocs/API_users_guide.html specifies that whenever an application tries to open a port in use by another application the PortInUseException will be thrown I know some didnt like it this way but I'm not sure how to avoid it. We will just be writing to a bogus fd if we catch the exeption Trent */ // try { fd = open( name ); this.name = name; MonitorThreadLock = true; monThread = new MonitorThread(); monThread.start(); waitForTheNativeCodeSilly(); MonitorThreadAlive=true; // } catch ( PortInUseException e ){} timeout = -1; /* default disabled timeout */ if (debug) z.reportln( "RXTXPort:RXTXPort("+name+") returns with fd = " + fd); } private native synchronized int open( String name ) throws PortInUseException; /* dont close the file while accessing the fd */ int IOLocked = 0; Object IOLockedMutex = new Object(); /** File descriptor */ private int fd = 0; /** a pointer to the event info structure used to share information between threads so write threads can send output buffer empty from a pthread if need be. long for 64 bit pointers. */ long eis = 0; /** pid for lock files */ int pid = 0; /** DSR flag **/ static boolean dsrFlag = false; /** Output stream */ private final SerialOutputStream out = new SerialOutputStream(); /** * get the OutputStream * @return OutputStream */ public OutputStream getOutputStream() { if (debug) z.reportln( "RXTXPort:getOutputStream() called and returning"); return out; } /** Input stream */ private final SerialInputStream in = new SerialInputStream(); /** * get the InputStream * @return InputStream * @see java.io.InputStream */ public InputStream getInputStream() { if (debug) z.reportln( "RXTXPort:getInputStream() called and returning"); return in; } /** * Set the SerialPort parameters * 1.5 stop bits requires 5 databits * @param b baudrate * @param d databits * @param s stopbits * @param p parity * @throws UnsupportedCommOperationException * @see gnu.io.UnsupportedCommOperationException * If speed is not a predifined speed it is assumed to be * the actual speed desired. */ private native int nativeGetParity( int fd ); private native int nativeGetFlowControlMode( int fd ); public synchronized void setSerialPortParams( int b, int d, int s, int p ) throws UnsupportedCommOperationException { if (debug) z.reportln( "RXTXPort:setSerialPortParams(" + b + " " + d + " " + s + " " + p + ") called"); if ( nativeSetSerialPortParams( b, d, s, p ) ) throw new UnsupportedCommOperationException( "Invalid Parameter" ); speed = b; if( s== STOPBITS_1_5 ) dataBits = DATABITS_5; else dataBits = d; stopBits = s; parity = p; z.reportln( "RXTXPort:setSerialPortParams(" + b + " " + d + " " + s + " " + p + ") returning"); } /** * Set the native serial port parameters * If speed is not a predifined speed it is assumed to be * the actual speed desired. */ private native boolean nativeSetSerialPortParams( int speed, int dataBits, int stopBits, int parity ) throws UnsupportedCommOperationException; /** Line speed in bits-per-second */ private int speed=9600; /** * @return int representing the baudrate * This will not behave as expected with custom speeds */ public int getBaudRate() { if (debu