/*--------------------------------------------------------------------------- * Copyright (C) 1999,2000 Dallas Semiconductor Corporation, All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Dallas Semiconductor * shall not be used except as stated in the Dallas Semiconductor * Branding Policy. *--------------------------------------------------------------------------- */ package com.dalsemi.onewire.adapter; // imports import java.util.Enumeration; import com.dalsemi.onewire.container.OneWireContainer; import com.dalsemi.onewire.*; import com.dalsemi.onewire.adapter.*; import com.dalsemi.onewire.OneWireException; import java.util.Vector; import java.lang.ClassNotFoundException; import java.io.File; /** * The DSPortAdapter class for all TMEX native adapters (Win32). * * @version 0.00, 28 Aug 2000 * @author DS */ public class TMEXAdapter extends DSPortAdapter { //-------- //-------- Variables //-------- /** flag to intidate if native driver got loaded */ private static boolean driverLoaded = false; /** TMEX port type number (0-15) */ protected int portType; /** Current 1-Wire Network Address */ protected byte[] RomDta = new byte [8]; /** Flag to indicate next search will look only for alarming devices */ private boolean doAlarmSearch = false; /** Flag to indicate next search will be a 'first' */ private boolean resetSearch = true; /** Flag to indicate next search will not be preceeded by a 1-Wire reset */ private boolean skipResetOnSearch = false; //-------- //-------- Constructors/Destructor //-------- /** * Constructs a default adapter * * @throws ClassNotFoundException */ public TMEXAdapter () throws ClassNotFoundException { // check if native driver got loaded if (!driverLoaded) throw new ClassNotFoundException( "native driver 'ibtmjava.dll' not loaded"); // set default port type portType = getDefaultTypeNumber(); // attempt to set the portType, will throw exception if does not exist if (!setPortType_Native(portType)) throw new ClassNotFoundException("TMEX adapter type does not exist"); } /** * Constructs with a specified port type * * * @param newPortType * @throws ClassNotFoundException */ public TMEXAdapter (int newPortType) throws ClassNotFoundException { // set default port type portType = newPortType; // check if native driver got loaded if (!driverLoaded) throw new ClassNotFoundException( "native driver 'ibtmjava.dll' not loaded"); // attempt to set the portType, will throw exception if does not exist if (!setPortType_Native(portType)) throw new ClassNotFoundException("TMEX adapter type does not exist"); } /** * Finalize to Cleanup native */ protected void finalize () { cleanup_Native(); } //-------- //-------- Methods //-------- /** * Retrieve the name of the port adapter as a string. The 'Adapter' * is a device that connects to a 'port' that allows one to * communicate with an iButton or other 1-Wire device. As example * of this is 'DS9097U'. * * @return String representation of the port adapter. */ public native String getAdapterName (); /** * Retrieve a description of the port required by this port adapter. * An example of a 'Port' would 'serial communication port'. * * @return String description of the port type required. */ public native String getPortTypeDescription (); /** * Retrieve a version string for this class. * * @return version string */ public String getClassVersion () { return new String("0.00, native: " + getVersion_Native()); } //-------- //-------- Port Selection //-------- /** * Retrieve a list of the platform appropriate port names for this * adapter. A port must be selected with the method 'selectPort' * before any other communication methods can be used. Using * a communcation method before 'selectPort' will result in * a OneWireException exception. * * @return enumeration of type String that contains the port * names */ public Enumeration getPortNames () { Vector portVector = new Vector(); String header = getPortNameHeader_Native(); for (int i = 0; i < 16; i++) portVector.addElement(new String(header + Integer.toString(i))); return (portVector.elements()); } /** * Specify a platform appropriate port name for this adapter. Note that * even though the port has been selected, it's ownership may be relinquished * if it is not currently held in a 'exclusive' block. This class will then * try to re-aquire the port when needed. If the port cannot be re-aquired * ehen the exception PortInUseException will be thrown. * * @param portName name of the target port, retrieved from * getPortNames() * * @return true if the port was aquired, false * if the port is not available. * * @throws OneWireIOException * @throws OneWireException */ public native boolean selectPort (String portName) throws OneWireIOException, OneWireException; /** * Free ownership of the selected port if it is currently owned back * to the system. This should only be called if the recently * selected port does not have an adapter or at the end of * your application's use of the port. * * @throws OneWireException */ public native void freePort () throws OneWireException; /** * Retrieve the name of the selected port as a String. * * @return String of selected port * * @throws OneWireException */ public native String getPortName () throws OneWireException; //-------- //-------- Adapter detection //-------- /** * Detect adapter presence on the selected port. * * @return true if the adapter is confirmed to be connected to * the selected port, false if the adapter is not connected. * * @throws OneWireIOException * @throws OneWireException */ public native boolean adapterDetected () throws OneWireIOException, OneWireException; /** * Retrieve the version of the adapter. * * @return String of the adapter version. It will return * "" if the adapter version is not or cannot be known. * * @throws OneWireIOException * @throws OneWireException */ public native String getAdapterVersion () throws OneWireIOException, OneWireException; /** * Retrieve the address of the adapter if it has one. * * @return String of the adapter address. It will return "" if * the adapter does not have an address. The address is a string representation of an * 1-Wire address. * * @throws OneWireIOException * @throws OneWireException */ public String getAdapterAddress () throws OneWireIOException, OneWireException { return ""; //??? implement later } //-------- //-------- Adapter features //-------- /* The following interogative methods are provided so that client code * can react selectively to underlying states without generating an * exception. */ /** * Returns whether adapter can physically support overdrive mode. * * @return true if this port adapter can do OverDrive, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canOverdrive () throws OneWireIOException, OneWireException; /** * Returns whether the adapter can physically support hyperdrive mode. * * @return true if this port adapter can do HyperDrive, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canHyperdrive () throws OneWireIOException, OneWireException; /** * Returns whether the adapter can physically support flex speed mode. * * @return true if this port adapter can do flex speed, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canFlex () throws OneWireIOException, OneWireException; /** * Returns whether adapter can physically support 12 volt power mode. * * @return true if this port adapter can do Program voltage, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canProgram () throws OneWireIOException, OneWireException; /** * Returns whether the adapter can physically support strong 5 volt power * mode. * * @return true if this port adapter can do strong 5 volt * mode, false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canDeliverPower () throws OneWireIOException, OneWireException; /** * Returns whether the adapter can physically support "smart" strong 5 * volt power mode. "smart" power delivery is the ability to deliver * power until it is no longer needed. The current drop it detected * and power delivery is stopped. * * @return true if this port adapter can do "smart" strong * 5 volt mode, false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canDeliverSmartPower () throws OneWireIOException, OneWireException; /** * Returns whether adapter can physically support 0 volt 'break' mode. * * @return true if this port adapter can do break, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean canBreak () throws OneWireIOException, OneWireException; //-------- //-------- Finding iButtons and 1-Wire devices //-------- /** * Returns true if the first iButton or 1-Wire device * is found on the 1-Wire Network. * If no devices are found, then false will be returned. * * @return true if an iButton or 1-Wire device is found. * * @throws OneWireIOException * @throws OneWireException */ public boolean findFirstDevice () throws OneWireIOException, OneWireException { // reset the internal rom buffer resetSearch = true; return findNextDevice(); } /** * Returns true if the next iButton or 1-Wire device * is found. The previous 1-Wire device found is used * as a starting point in the search. If no more devices are found * then false will be returned. * * @return true if an iButton or 1-Wire device is found. * * @throws OneWireIOException * @throws OneWireException */ public boolean findNextDevice () throws OneWireIOException, OneWireException { boolean retval; while (true) { retval = romSearch_Native(skipResetOnSearch, resetSearch, doAlarmSearch, RomDta); if (retval) { resetSearch = false; // check if this is an OK family type if (isValidFamily(RomDta)) return true; // Else, loop to the top and do another search. } else { resetSearch = true; return false; } } } /** * Copies the 'current' iButton address being used by the adapter into * the array. This address is the last iButton or 1-Wire device found * in a search (findNextDevice()...). * This method copies into a user generated array to allow the * reuse of the buffer. When searching many iButtons on the one * wire network, this will reduce the memory burn rate. * * @param address An array to be filled with the current iButton address. */ public void getAddress (byte[] address) { System.arraycopy(RomDta, 0, address, 0, 8); } /** * Verifies that the iButton or 1-Wire device specified is present on * the 1-Wire Network. This does not affect the 'current' device * state information used in searches (findNextDevice...). * * @param address device address to verify is present * * @return true if device is present else * false. * * @throws OneWireIOException * @throws OneWireException */ public native boolean isPresent (byte[] address) throws OneWireIOException, OneWireException; /** * Verifies that the iButton or 1-Wire device specified is present * on the 1-Wire Network and in an alarm state. This does not * affect the 'current' device state information used in searches * (findNextDevice...). * * @param address device address to verify is present and alarming * * @return true if device is present and alarming else * false. * * @throws OneWireIOException * @throws OneWireException */ public native boolean isAlarming (byte[] address) throws OneWireIOException, OneWireException; /** * Selects the specified iButton or 1-Wire device by broadcasting its * address. This operation is refered to a 'MATCH ROM' operation * in the iButton and 1-Wire device data sheets. This does not * affect the 'current' device state information used in searches * (findNextDevice...). * * Warning, this does not verify that the device is currently present * on the 1-Wire Network (See isPresent). * * @param address iButton to select * * @return true if device address was sent,false * otherwise. * * @throws OneWireIOException * @throws OneWireException * * @see com.dalsemi.onewire.adapter.DSPortAdapter#isPresent(byte[] address) */ public native boolean select (byte[] address) throws OneWireIOException, OneWireException; //-------- //-------- Finding iButton/1-Wire device options //-------- /** * Set the 1-Wire Network search to find only iButtons and 1-Wire * devices that are in an 'Alarm' state that signals a need for * attention. Not all iButton types * have this feature. Some that do: DS1994, DS1920, DS2407. * This selective searching can be canceled with the * 'setSearchAllDevices()' method. */ public void setSearchOnlyAlarmingDevices () { doAlarmSearch = true; } /** * Set the 1-Wire Network search to not perform a 1-Wire * reset before a search. This feature is chiefly used with * the DS2409 1-Wire coupler. * The normal reset before each search can be restored with the * 'setSearchAllDevices()' method. */ public void setNoResetSearch () { skipResetOnSearch = true; } /** * Set the 1-Wire Network search to find all iButtons and 1-Wire * devices whether they are in an 'Alarm' state or not and * restores the default setting of providing a 1-Wire reset * command before each search. (see setNoResetSearch() method). */ public void setSearchAllDevices () { doAlarmSearch = false; skipResetOnSearch = false; } //-------- //-------- 1-Wire Network Semaphore methods //-------- /** * Gets exclusive use of the 1-Wire to communicate with an iButton or * 1-Wire Device. * This method should be used for critical sections of code where a * sequence of commands must not be interrupted by communication of * threads with other iButtons, and it is permissible to sustain * a delay in the special case that another thread has already been * granted exclusive access and this access has not yet been * relinquished.

* * It can be called through the OneWireContainer * class by the end application if they want to ensure exclusive * use. If it is not called around several methods then it * will be called inside each method. * * @param blocking true if want to block waiting * for an excluse access to the adapter * @return true if blocking was false and a * exclusive session with the adapter was aquired * * @throws OneWireException */ public native boolean beginExclusive (boolean blocking) throws OneWireException; /** * Relinquishes exclusive control of the 1-Wire Network. * This command dynamically marks the end of a critical section and * should be used when exclusive control is no longer needed. */ public native void endExclusive (); //-------- //-------- Primitive 1-Wire Network data methods //-------- /** * Sends a bit to the 1-Wire Network. * * @param bitValue the bit value to send to the 1-Wire Network. * * @throws OneWireIOException * @throws OneWireException */ public void putBit (boolean bitValue) throws OneWireIOException, OneWireException { if (dataBit_Native(bitValue) != bitValue) throw new OneWireIOException("Error during putBit()"); } /** * Gets a bit from the 1-Wire Network. * * @return the bit value recieved from the the 1-Wire Network. * * @throws OneWireIOException * @throws OneWireException */ public boolean getBit () throws OneWireIOException, OneWireException { return dataBit_Native(true); } /** * Sends a byte to the 1-Wire Network. * * @param byteValue the byte value to send to the 1-Wire Network. * * @throws OneWireIOException * @throws OneWireException */ public void putByte (int byteValue) throws OneWireIOException, OneWireException { if (dataByte_Native(byteValue & 0x00FF) != ((0x00FF) & byteValue)) throw new OneWireIOException( "Error during putByte(), echo was incorrect "); } /** * Gets a byte from the 1-Wire Network. * * @return the byte value received from the the 1-Wire Network. * * @throws OneWireIOException * @throws OneWireException */ public int getByte () throws OneWireIOException, OneWireException { return dataByte_Native(0x00FF); } /** * Get a block of data from the 1-Wire Network. * * @param len length of data bytes to receive * * @return the data received from the 1-Wire Network. * * @throws OneWireIOException * @throws OneWireException */ public byte[] getBlock (int len) throws OneWireIOException, OneWireException { byte[] barr = new byte [len]; getBlock(barr, 0, len); return barr; } /** * Get a block of data from the 1-Wire Network and write it into * the provided array. * * @param arr array in which to write the received bytes * @param len length of data bytes to receive * * @throws OneWireIOException * @throws OneWireException */ public void getBlock (byte[] arr, int len) throws OneWireIOException, OneWireException { getBlock(arr, 0, len); } /** * Get a block of data from the 1-Wire Network and write it into * the provided array. * * @param arr array in which to write the received bytes * @param off offset into the array to start * @param len length of data bytes to receive * * @throws OneWireIOException * @throws OneWireException */ public native void getBlock (byte[] arr, int off, int len) throws OneWireIOException, OneWireException; /** * Sends a block of data and returns the data received in the same array. * This method is used when sending a block that contains reads and writes. * The 'read' portions of the data block need to be pre-loaded with 0xFF's. * It starts sending data from the index at offset 'off' for length 'len'. * * @param dataBlock array of data to transfer to and from the 1-Wire Network. * @param off offset into the array of data to start * @param len length of data to send / receive starting at 'off' * * @throws OneWireIOException * @throws OneWireException */ public native void dataBlock (byte dataBlock [], int off, int len) throws OneWireIOException, OneWireException; /** * Sends a Reset to the 1-Wire Network. * * @return the result of the reset. Potential results are: *

    *
  • 0 (RESET_NOPRESENCE) no devices present on the 1-Wire Network. *
  • 1 (RESET_PRESENCE) normal presence pulse detected on the 1-Wire * Network indicating there is a device present. *
  • 2 (RESET_ALARM) alarming presence pulse detected on the 1-Wire * Network indicating there is a device present and it is in the * alarm condition. This is only provided by the DS1994/DS2404 * devices. *
  • 3 (RESET_SHORT) inticates 1-Wire appears shorted. This can be * transient conditions in a 1-Wire Network. Not all adapter types * can detect this condition. *
* * @throws OneWireIOException * @throws OneWireException */ public native int reset () throws OneWireIOException, OneWireException; //-------- //-------- 1-Wire Network power methods //-------- /** * Sets the duration to supply power to the 1-Wire Network. * This method takes a time parameter that indicates the program * pulse length when the method startPowerDelivery().

* * Note: to avoid getting an exception, * use the canDeliverPower() and canDeliverSmartPower() * method to check it's availability.

* * @param timeFactor *

    *
  • 0 (DELIVERY_HALF_SECOND) provide power for 1/2 second. *
  • 1 (DELIVERY_ONE_SECOND) provide power for 1 second. *
  • 2 (DELIVERY_TWO_SECONDS) provide power for 2 seconds. *
  • 3 (DELIVERY_FOUR_SECONDS) provide power for 4 seconds. *
  • 4 (DELIVERY_SMART_DONE) provide power until the * the device is no longer drawing significant power. *
  • 5 (DELIVERY_INFINITE) provide power until the * setPowerNormal() method is called. *
* * @throws OneWireIOException * @throws OneWireException */ public void setPowerDuration (int timeFactor) throws OneWireIOException, OneWireException { // Right now we only support infinite pull up. if (timeFactor != DELIVERY_INFINITE) throw new OneWireException( "No support for other than infinite power duration"); } /** * Sets the 1-Wire Network voltage to supply power to an iButton device. * This method takes a time parameter that indicates whether the * power delivery should be done immediately, or after certain * conditions have been met.

* * Note: to avoid getting an exception, * use the canDeliverPower() and canDeliverSmartPower() * method to check it's availability.

* * @param changeCondition *

    *
  • 0 (CONDITION_NOW) operation should occur immediately. *
  • 1 (CONDITION_AFTER_BIT) operation should be pending * execution immediately after the next bit is sent. *
  • 2 (CONDITION_AFTER_BYTE) operation should be pending * execution immediately after next byte is sent. *
* * @return true if the voltage change was successful, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean startPowerDelivery (int changeCondition) throws OneWireIOException, OneWireException; /** * Sets the duration for providing a program pulse on the * 1-Wire Network. * This method takes a time parameter that indicates the program * pulse length when the method startProgramPulse().

* * Note: to avoid getting an exception, * use the canDeliverPower() method to check it's * availability.

* * @param timeFactor *

    *
  • 6 (DELIVERY_EPROM) provide program pulse for 480 microseconds *
  • 5 (DELIVERY_INFINITE) provide power until the * setPowerNormal() method is called. *
* * @throws OneWireIOException * @throws OneWireException */ public void setProgramPulseDuration (int timeFactor) throws OneWireIOException, OneWireException { if (timeFactor != DELIVERY_EPROM) throw new OneWireException( "Only support EPROM length program pulse duration"); } /** * Sets the 1-Wire Network voltage to eprom programming level. * This method takes a time parameter that indicates whether the * power delivery should be done immediately, or after certain * conditions have been met.

* * Note: to avoid getting an exception, * use the canProgram() method to check it's * availability.

* * @param changeCondition *

    *
  • 0 (CONDITION_NOW) operation should occur immediately. *
  • 1 (CONDITION_AFTER_BIT) operation should be pending * execution immediately after the next bit is sent. *
  • 2 (CONDITION_AFTER_BYTE) operation should be pending * execution immediately after next byte is sent. *
* * @return true if the voltage change was successful, * false otherwise. * * @throws OneWireIOException * @throws OneWireException */ public native boolean startProgramPulse (int changeCondition) throws OneWireIOException, OneWireException; /** * Sets the 1-Wire Network voltage to 0 volts. This method is used * rob all 1-Wire Network devices of parasite power delivery to force * them into a hard reset. * * @throws OneWireIOException * @throws OneWireException */ public native void startBreak () throws OneWireIOException, OneWireException; /** * Sets the 1-Wire Network voltage to normal level. This method is used * to disable 1-Wire conditions created by startPowerDelivery and * startProgramPulse. This method will automatically be called if * a communication method is called while an outstanding power * command is taking place. * * @throws OneWireIOException * @throws OneWireException */ public native void setPowerNormal () throws OneWireIOException, OneWireException; //-------- //-------- 1-Wire Network speed methods //-------- /** * This method takes an int representing the new speed of data * transfer on the 1-Wire Network.

* * @param speed *

    *
  • 0 (SPEED_REGULAR) set to normal communciation speed *
  • 1 (SPEED_FLEX) set to flexible communciation speed used * for long lines *
  • 2 (SPEED_OVERDRIVE) set to normal communciation speed to * overdrive *
  • 3 (SPEED_HYPERDRIVE) set to normal communciation speed to * hyperdrive *
  • >3 future speeds *
* * @param desiredSpeed * * @throws OneWireIOException * @throws OneWireException */ public native void setSpeed (int desiredSpeed) throws OneWireIOException, OneWireException; /** * This method returns the current data transfer speed through a * port to a 1-Wire Network.

* * @return *

    *
  • 0 (SPEED_REGULAR) set to normal communication speed *
  • 1 (SPEED_FLEX) set to flexible communication speed used * for long lines *
  • 2 (SPEED_OVERDRIVE) set to normal communication speed to * overdrive *
  • 3 (SPEED_HYPERDRIVE) set to normal communication speed to * hyperdrive *
  • >3 future speeds *
*/ public native int getSpeed (); //-------- //-------- Misc //-------- /** * Select the TMEX specified port type (0 to 15) Use this * method if the constructor with the PortType cannot be used. * * * @param newPortType * @return true if port type valid. Instance is only usable * if this returns false. */ public boolean setTMEXPortType (int newPortType) { // set default port type portType = newPortType; // attempt to set the portType, return result return setPortType_Native(portType); } //-------- //-------- Additional Native Methods //-------- /** * Get the default Adapter Name. * * @return String containing the name of the default adapter */ public static native String getDefaultAdapterName (); /** * Get the default Adapter Port name. * * @return String containing the name of the default adapter port */ public static native String getDefaultPortName (); /** * Get the default Adapter Type number. * * @return int, the default adapter type */ private static native int getDefaultTypeNumber (); /** * Attempt to set the desired TMEX Port type. This native * call will attempt to get a session handle to verify that * the portType exists. * * @return true if portType exists, false if not */ private native boolean setPortType_Native (int portType); /** * Perform a 1-Wire bit operation * * @param bitValue boolean bit value, true=1, false=0 to send * to 1-Wire net * * @return boolean true for 1 return , false for 0 return * * @throws OneWireIOException * @throws OneWireException */ private native boolean dataBit_Native (boolean bitValue) throws OneWireIOException, OneWireException; /** * Perform a 1-Wire byte operation * * @param byteValue integer with ls byte containing the 8 bits value * to send to the 1-Wire net * * @return int containing the 1-Wire return 8 bits in the ls byte. * * @throws OneWireIOException * @throws OneWireException */ private native int dataByte_Native (int byteValue) throws OneWireIOException, OneWireException; /** * Get the TMEX main and porttype version strings concatinated * * @return string containing the TMEX version */ private native String getVersion_Native (); /** * Peform a search * * @param skipResetOnSearch boolean, true to skip 1-Wire reset on search * @param resetSearch boolean, true to reset search (First) * @param doAlarmSearch boolean, true if only want to find alarming * @param RomDta byte array to hold ROM of device found * * @return boolean, true if search found a device else false * * @throws OneWireIOException * @throws OneWireException */ private native boolean romSearch_Native (boolean skipResetOnSearch, boolean resetSearch, boolean doAlarmSearch, byte[] RomDta) throws OneWireIOException, OneWireException; /** * Return the port name header (taken from porttype version) * * @return String containing the port name header */ private native String getPortNameHeader_Native (); /** * Cleanup native (called on finalize of this instance) */ private native void cleanup_Native (); //-------- //-------- Native driver loading //-------- /** * Static method called before instance is created. Attempt * verify native driver's installed and to load the * driver (IBTMJAVA.DLL). */ static { driverLoaded = false; // check if on OS that can have native TMEX drivers if ((System.getProperty("os.arch").indexOf("86") != -1) && (System.getProperty("os.name").indexOf("Windows") != -1)) { // check if TMEX native drivers installed int index = 0, last_index = 0; String search_path = System.getProperty("java.library.path"); String path; File file; boolean tmex_loaded = false; // loop to look through the library search path do { index = search_path.indexOf(File.pathSeparatorChar, last_index); if (index > -1) { path = search_path.substring(last_index, index); // look to see if IBFS32.DLL is in this path file = new File(path + File.separator + "IBFS32.DLL"); if (file.exists()) { tmex_loaded = true; break; } } last_index = index + 1; } while (index > -1); if (tmex_loaded) { try { System.loadLibrary("ibtmjava"); driverLoaded = true; } catch (UnsatisfiedLinkError e) { System.err.println( "Could not load Java to TMEX-native bridge driver: ibtmjava.dll"); } } else System.err.println( "Native drivers not found, download iButton-TMEX RTE Win32 from www.ibutton.com"); } } }