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jssc.SerialNativeInterface Maven / Gradle / Ivy
/* jSSC (Java Simple Serial Connector) - serial port communication library.
* © Alexey Sokolov (scream3r), 2010-2014.
*
* This file is part of jSSC.
*
* jSSC 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 3 of the License, or
* (at your option) any later version.
*
* jSSC 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with jSSC. If not, see [email protected]
* web-site: http://scream3r.org | http://code.google.com/p/java-simple-serial-connector/
*/
package jssc;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
*
* @author scream3r
*/
public class SerialNativeInterface {
private static final String libVersion = "2.8"; //jSSC-2.8.0 Release from 24.01.2014
private static final String libMinorSuffix = "0"; //since 0.9.0
public static final int OS_LINUX = 0;
public static final int OS_WINDOWS = 1;
public static final int OS_SOLARIS = 2;//since 0.9.0
public static final int OS_MAC_OS_X = 3;//since 0.9.0
private static int osType = -1;
/**
* @since 2.3.0
*/
public static final long ERR_PORT_BUSY = -1;
/**
* @since 2.3.0
*/
public static final long ERR_PORT_NOT_FOUND = -2;
/**
* @since 2.3.0
*/
public static final long ERR_PERMISSION_DENIED = -3;
/**
* @since 2.3.0
*/
public static final long ERR_INCORRECT_SERIAL_PORT = -4;
/**
* @since 2.6.0
*/
public static final String PROPERTY_JSSC_NO_TIOCEXCL = "JSSC_NO_TIOCEXCL";
/**
* @since 2.6.0
*/
public static final String PROPERTY_JSSC_IGNPAR = "JSSC_IGNPAR";
/**
* @since 2.6.0
*/
public static final String PROPERTY_JSSC_PARMRK = "JSSC_PARMRK";
static {
String libFolderPath;
String libName;
String osName = System.getProperty("os.name");
String architecture = System.getProperty("os.arch");
String userHome = System.getProperty("user.home");
String fileSeparator = System.getProperty("file.separator");
String tmpFolder = System.getProperty("java.io.tmpdir");
//since 2.3.0 ->
String libRootFolder = new File(userHome).canWrite() ? userHome : tmpFolder;
//<- since 2.3.0
String javaLibPath = System.getProperty("java.library.path");//since 2.1.0
if(osName.equals("Linux")){
osName = "linux";
osType = OS_LINUX;
}
else if(osName.startsWith("Win")){
osName = "windows";
osType = OS_WINDOWS;
}//since 0.9.0 ->
else if(osName.equals("SunOS")){
osName = "solaris";
osType = OS_SOLARIS;
}
else if(osName.equals("Mac OS X") || osName.equals("Darwin")){//os.name "Darwin" since 2.6.0
osName = "mac_os_x";
osType = OS_MAC_OS_X;
}//<- since 0.9.0
if(architecture.equals("i386") || architecture.equals("i686")){
architecture = "x86";
}
else if(architecture.equals("amd64") || architecture.equals("universal")){//os.arch "universal" since 2.6.0
architecture = "x86_64";
}
else if(architecture.equals("arm")) {//since 2.1.0
String floatStr = "sf";
if(javaLibPath.toLowerCase().contains("gnueabihf") || javaLibPath.toLowerCase().contains("armhf")){
floatStr = "hf";
}
else {
try {
Process readelfProcess = Runtime.getRuntime().exec("readelf -A /proc/self/exe");
BufferedReader reader = new BufferedReader(new InputStreamReader(readelfProcess.getInputStream()));
String buffer = "";
while((buffer = reader.readLine()) != null && !buffer.isEmpty()){
if(buffer.toLowerCase().contains("Tag_ABI_VFP_args".toLowerCase())){
floatStr = "hf";
break;
}
}
reader.close();
}
catch (Exception ex) {
//Do nothing
}
}
architecture = "arm" + floatStr;
}
libFolderPath = libRootFolder + fileSeparator + ".jssc" + fileSeparator + osName;
libName = "jSSC-" + libVersion + "_" + architecture;
libName = System.mapLibraryName(libName);
if(libName.endsWith(".dylib")){//Since 2.1.0 MacOSX 10.8 fix
libName = libName.replace(".dylib", ".jnilib");
}
boolean loadLib = false;
if(isLibFolderExist(libFolderPath)){
if(isLibFileExist(libFolderPath + fileSeparator + libName)){
loadLib = true;
}
else {
if(extractLib((libFolderPath + fileSeparator + libName), osName, libName)){
loadLib = true;
}
}
}
else {
if(new File(libFolderPath).mkdirs()){
if(extractLib((libFolderPath + fileSeparator + libName), osName, libName)){
loadLib = true;
}
}
}
if (loadLib) {
System.load(libFolderPath + fileSeparator + libName);
String versionBase = getLibraryBaseVersion();
String versionNative = getNativeLibraryVersion();
if (!versionBase.equals(versionNative)) {
System.err.println("Warning! jSSC Java and Native versions mismatch (Java: " + versionBase + ", Native: " + versionNative + ")");
}
}
}
/**
* Is library folder exists
*
* @param libFolderPath
*
* @since 0.8
*/
private static boolean isLibFolderExist(String libFolderPath) {
boolean returnValue = false;
File folder = new File(libFolderPath);
if(folder.exists() && folder.isDirectory()){
returnValue = true;
}
return returnValue;
}
/**
* Is library file exists
*
* @param libFilePath
*
* @since 0.8
*/
private static boolean isLibFileExist(String libFilePath) {
boolean returnValue = false;
File folder = new File(libFilePath);
if(folder.exists() && folder.isFile()){
returnValue = true;
}
return returnValue;
}
/**
* Extract lib to lib folder
*
* @param libFilePath
* @param osName
* @param libName
*
* @since 0.8
*/
private static boolean extractLib(String libFilePath, String osName, String libName) {
boolean returnValue = false;
File libFile = new File(libFilePath);
InputStream input = null;
FileOutputStream output = null;
input = SerialNativeInterface.class.getResourceAsStream("/libs/" + osName + "/" + libName);
if(input != null){
int read;
byte[] buffer = new byte[4096];
try {
output = new FileOutputStream(libFilePath);
while((read = input.read(buffer)) != -1){
output.write(buffer, 0, read);
}
output.close();
input.close();
returnValue = true;
}
catch (Exception ex) {
try {
output.close();
if(libFile.exists()){
libFile.delete();
}
}
catch (Exception ex_out) {
//Do nothing
}
try {
input.close();
}
catch (Exception ex_in) {
//Do nothing
}
}
}
return returnValue;
}
/**
* Get OS type (OS_LINUX || OS_WINDOWS || OS_SOLARIS)
*
* @since 0.8
*/
public static int getOsType() {
return osType;
}
/**
* Get jSSC version. The version of library is Base Version + Minor Suffix
*
* @since 0.8
*/
public static String getLibraryVersion() {
return libVersion + "." + libMinorSuffix;
}
/**
* Get jSSC Base Version
*
* @since 0.9.0
*/
public static String getLibraryBaseVersion() {
return libVersion;
}
/**
* Get jSSC minor suffix. For example in version 0.8.1 - 1 is a minor suffix
*
* @since 0.9.0
*/
public static String getLibraryMinorSuffix() {
return libMinorSuffix;
}
/**
* Get jSSC native library version
*
* @return native lib version (for jSSC-2.8.0 should be 2.8 for example)
*
* @since 2.8.0
*/
public static native String getNativeLibraryVersion();
/**
* Open port
*
* @param portName name of port for opening
* @param useTIOCEXCL enable/disable using of TIOCEXCL . Take effect only on *nix based systems
*
* @return handle of opened port or -1 if opening of the port was unsuccessful
*/
public native long openPort(String portName, boolean useTIOCEXCL);
/**
* Setting the parameters of opened port
*
* @param handle handle of opened port
* @param baudRate data transfer rate
* @param dataBits number of data bits
* @param stopBits number of stop bits
* @param parity parity
* @param setRTS initial state of RTS line (ON/OFF)
* @param setDTR initial state of DTR line (ON/OFF)
* @param flags additional Native settings. Take effect only on *nix based systems
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean setParams(long handle, int baudRate, int dataBits, int stopBits, int parity, boolean setRTS, boolean setDTR, int flags);
/**
* Purge of input and output buffer
*
* @param handle handle of opened port
* @param flags flags specifying required actions for purgePort method
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean purgePort(long handle, int flags);
/**
* Close port
*
* @param handle handle of opened port
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean closePort(long handle);
/**
* Set events mask
*
* @param handle handle of opened port
* @param mask events mask
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean setEventsMask(long handle, int mask);
/**
* Get events mask
*
* @param handle handle of opened port
*
* @return Method returns event mask as a variable of int type
*/
public native int getEventsMask(long handle);
/**
* Wait events
*
* @param handle handle of opened port
*
* @return Method returns two-dimensional array containing event types and their values
* (events[i][0] - event type , events[i][1] - event value ).
*/
public native int[][] waitEvents(long handle);
/**
* Change RTS line state
*
* @param handle handle of opened port
* @param value true - ON , false - OFF
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean setRTS(long handle, boolean value);
/**
* Change DTR line state
*
* @param handle handle of opened port
* @param value true - ON , false - OFF
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean setDTR(long handle, boolean value);
/**
* Read data from port
*
* @param handle handle of opened port
* @param byteCount count of bytes required to read
*
* @return Method returns the array of read bytes
*/
public native byte[] readBytes(long handle, int byteCount);
/**
* Write data to port
*
* @param handle handle of opened port
* @param buffer array of bytes to write
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*/
public native boolean writeBytes(long handle, byte[] buffer);
/**
* Get bytes count in buffers of port
*
* @param handle handle of opened port
*
* @return Method returns the array that contains info about bytes count in buffers:
* element 0 - input buffer
* element 1 - output buffer
*
* @since 0.8
*/
public native int[] getBuffersBytesCount(long handle);
/**
* Set flow control mode
*
* @param handle handle of opened port
* @param mask mask of flow control mode
*
* @return If the operation is successfully completed, the method returns true, otherwise false
*
* @since 0.8
*/
public native boolean setFlowControlMode(long handle, int mask);
/**
* Get flow control mode
*
* @param handle handle of opened port
*
* @return Mask of setted flow control mode
*
* @since 0.8
*/
public native int getFlowControlMode(long handle);
/**
* Get serial port names like an array of String
*
* @return unsorted array of String with port names
*/
public native String[] getSerialPortNames();
/**
* Getting lines states
*
* @param handle handle of opened port
*
* @return Method returns the array containing information about lines in following order:
* element 0 - CTS line state
* element 1 - DSR line state
* element 2 - RING line state
* element 3 - RLSD line state
*/
public native int[] getLinesStatus(long handle);
/**
* Send Break singnal for setted duration
*
* @param handle handle of opened port
* @param duration duration of Break signal
* @return If the operation is successfully completed, the method returns true, otherwise false
*
* @since 0.8
*/
public native boolean sendBreak(long handle, int duration);
}
