Trying to use LibusbJava in Processing

olivi55 — Mon, 13 Aug 2018 20:54:47 -0000

Hi everyone, I'd like to know if it would still be possible to use libusbjava like I found on this (really old) project in Processing...
I tried importing the library in Processing, and tried a little test code, but I get an error message :
“A library used by this sketch is not installed properly.” and “A library relies on native code that’s not available. Or only works properly when the sketch is run as a 32-bit application.”
Hope anyone has a solution,
Thanks forward !

java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I

pff — Tue, 19 Jun 2018 21:17:48 -0000

almost kind of...
i did
1) install libusb, libusbx from package manager. libusb is a wrapper for libusbx i think so need them bothe
2) svn checkout then jump to revision 280, this afaik is the latest version that has the functions for 0.5.9 I THINK
3) inside both libusbjava.cpp and libusbjava.h do a find/replace for inf_libubsjava_ -> usb_, this is where 0.5.9 expects to find the functions in the namespace or whatever its actually called.
4) edit project.properties, i pointed /usr/lib to /usr/lib64 because thats where my libusb.so were and also under linux specific i put in my paths for openjdk, (uncomment and modify includes2 and uncomment includes3), do "find / -iname "jni.h"" to get the path for includes2
5) build with "ant -v linux", see if there are any complaints. i get plenty of warings but no errors, if files are missing check your paths in project.properties.
6) copy .so to somewhere your 0.5.9 jar can find it.

the reason i got a segfault earlier was apparently i don't have the correct permissions to query usb devices, running as root doesn't crash but now i have
LibusbJava.usb_set_configuration: Numerical result out of range
I'm too annoyed about the permissions thing to look into it right now but i'm sure theres something in the svn log about accepting numbers >0 vs >=0 but i can't remeber what it was for exactly.

good luck nzasch keep me updated how you go.

java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I

nzasch — Thu, 14 Jun 2018 10:36:42 -0000

Hi
Have you found a way to get ch.ntb.usb-0.5.9.jar running in linux?

java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I

pff — Fri, 08 Jun 2018 09:22:51 -0000

I realised i have been silly, rather than the 1.1 so and jar the project was built with ch.ntb.usb-0.5.9.jar so i need to use an older .so that uses old libusb.
I didn't understand that the ch.ntb.usb-0.5.9.jar was the old version of libusbjava.
I tried building an older version from svn but java segfaults on one of the get string methods.

java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I

pff — Thu, 07 Jun 2018 20:28:23 -0000

ok i'm trying to follow these instructions https://github.com/tinwhisker/Owon-VDS1022 on fedora.
I dont know anything at all about java whatsoever.

i can't find a libusb-java package on my package manager.
i followed the instructions here: http://libusb-java.ch/installation/start
i run the jar file and get the folowing error: java.lang.UnsatisfiedLinkError: no usbJava in java.library.path

so i renamed libLibusbJava-1_1.so to libusbJava.so and copied it into the working directory
i run the jar file and get the following error: java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I

i think this means it can't find the libusb jar file.
i have tried moving the jar file into working directory, altering name case.

java -verbose doesn't mention anything about loading the libusb jar file.

so i don't really know what i'm doing and would appreciate any help thank you.

Libusb Java with Libusb-win32 filter driver

Erik — Fri, 05 Jan 2018 20:21:58 -0000

Hello

I'm trying to make a small app for X-Plane (flight simulator) to control the LEDs and a small display on the Logitech/Saitek X52 Pro Joystick.

I'm thinking i lines of:

[X-Plane] -> [My java app] -> [Libusb Java] -> [Libusb-win32 filter driver] -> [Logitech/Saitek driver] -> [Joystick]

The reason I need the filter driver approach is that the Logitech/Saitek driver needs to be installed to make the Joystick still act as a joystick. (I tried with a more recent version of Libusb but the drivers needed stoped the Joystick working)

First question: Am I on the right track at all?

Further more, I have installed libusb-win32-bin-1.2.6.0.zip and managed to install the filter driver. No errors reported.

I have installed Libusb Java (LibusbJava-1_1_64bit.zip) according to the instructions here and I have tried a small program based on the snippet from "First steps". I get as far as:

usbDev.open();

and there I get

java -cp .;lib\*;bin\ se.companion.usb.X52USB
Search Device:
Opening device.
Exception in thread "main" java.lang.NoClassDefFoundError: ch/ntb/inf/libusbJava/exceptions/LibusbException
        at ch.ntb.inf.libusb.Libusb.open(Native Method)
        at ch.ntb.inf.libusb.Device.open(Device.java:194)
        at se.companion.usb.X52USB.main(X52USB.java:54)
Caused by: java.lang.ClassNotFoundException: ch.ntb.inf.libusbJava.exceptions.LibusbException
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 3 more

Second question: What's going on with the exception? I don't se the package path "ch/ntb/inf/libusbJava..." in the LibusbJava.jar:

jar tf lib\LibusbJava.jar
META-INF/
META-INF/MANIFEST.MF
ch/ntb/inf/libusb/ConfigurationDescriptor.class
ch/ntb/inf/libusb/Context.class
ch/ntb/inf/libusb/Descriptor.class
ch/ntb/inf/libusb/DescriptorType.class
ch/ntb/inf/libusb/Device.class
ch/ntb/inf/libusb/DeviceDescriptor.class
ch/ntb/inf/libusb/EndpointDescriptor.class
ch/ntb/inf/libusb/exceptions/AccessDeniedException.class
ch/ntb/inf/libusb/exceptions/DeviceListNotValidException.class
ch/ntb/inf/libusb/exceptions/EntityNotFoundException.class
ch/ntb/inf/libusb/exceptions/InvalidParameterException.class
ch/ntb/inf/libusb/exceptions/JavaIllegalDeviceHandleException.class
ch/ntb/inf/libusb/exceptions/JavaReferencesNotLoadedException.class
ch/ntb/inf/libusb/exceptions/JavaWrongEnvironmentException.class
ch/ntb/inf/libusb/exceptions/LibusbException.class
ch/ntb/inf/libusb/exceptions/LibusbIOException.class
ch/ntb/inf/libusb/exceptions/NoDeviceException.class
ch/ntb/inf/libusb/exceptions/NoMemoryException.class
ch/ntb/inf/libusb/exceptions/NotSupportedException.class
ch/ntb/inf/libusb/exceptions/OtherException.class
ch/ntb/inf/libusb/exceptions/OverflowException.class
ch/ntb/inf/libusb/exceptions/PipeException.class
ch/ntb/inf/libusb/exceptions/ResourceBusyException.class
ch/ntb/inf/libusb/exceptions/SysCallInterruptedException.class
ch/ntb/inf/libusb/exceptions/TimeoutException.class
ch/ntb/inf/libusb/exceptions/WrongContextException.class
ch/ntb/inf/libusb/Interface.class
ch/ntb/inf/libusb/InterfaceDescriptor.class
ch/ntb/inf/libusb/Libusb.class
ch/ntb/inf/libusb/LibusbJava.class
ch/ntb/inf/libusb/Speed.class
ch/ntb/inf/libusb/test/AT90USB1287Test.class
ch/ntb/inf/libusb/test/ByteBufferTest.class
ch/ntb/inf/libusb/test/LibusbJavaListTest.class
ch/ntb/inf/libusb/test/LibusbJavaTest.class
ch/ntb/inf/libusb/test/UseTestLibusbJava.class
ch/ntb/inf/libusb/TransferType.class

Any help or pointers would be much appreciated, thanks!
/Erik

The complete program I'm trying to run:

package se.companion.usb;

import ch.ntb.inf.libusb.*;
import ch.ntb.inf.libusb.exceptions.*;
import ch.ntb.inf.libusb.test.*;

public class X52USB {
    public static void main(String[] args){
        Context useCtx = null;                           
        Device usbDev = null;
        try {
                useCtx = new Context();                                                  /* 1 */
        } catch (LibusbException e) {
                System.out.println("Init failed:");
            e.printStackTrace();
        }

        System.out.println("Search Device:");
        try {
            usbDev = Device.search(useCtx, 0x06a3, 0x0762);                           /* 2 */

        } catch (LibusbException e) {
            System.out.println("Error occured: search");
            e.printStackTrace();
        }

        if(usbDev == null) return;

        try {
            System.out.println("Opening device.");
            usbDev.open();                                                           /* 4 */
            System.out.println("Claim interface.");
            usbDev.claimInterface(0);                                                /* 5 */
            byte[] data = {(byte)0x40, (byte)0x80, (byte)0x12, (byte)0x16};
            int res = usbDev.bulkTransfer(2, data, data.length, 0);                  /* 6 */
            if(res == data.length){
                    System.out.println("Bulk tranfer 1 successful.");
            }
            else{
                System.out.println("Bulk transfer 1 failed.");
            }
            usbDev.reset();
            res = 0;
            res = usbDev.bulkTransfer(2, data, data.length, 0);                      /* 6 */
            if(res == data.length){
                System.out.println("Bulk tranfer 2 successful.");
            }
            else{
                System.out.println("Bulk transfer 2 failed.");
            }
            usbDev.releaseInterface(0);                                              /* 7 */
            usbDev.close();                                                          /* 8 */
            System.out.println("Device closed.");
        } catch (LibusbException e) {
            System.out.println("Error occured: transfer");
            e.printStackTrace();
        }
    }

}

Can you still use ch.ntb.usb-0.5.9.jar?

Ronald R Berliner — Tue, 03 Oct 2017 01:24:23 -0000

Thank you for the fast reply. I looked at the API for the new libusbjava but do not see how I can transfrer my (big) program over from the classes shown in ch.ntb.usb-0.5.9.jar to the new distro so I am trying to use the libusb-win32-bin-1.2.6.0 distribution.

This works fine in Win 7. On a Win-10 computer it is not working. However, the ch.ntb.usb-0.5.9. USBView program appears to work with my device just fine.

The test programs included in the distro: testlibusb.exe and testlibusb-win.exe also both appear to work. This makes it an even bigger puzzle.

My program hangs on the statement LibusbJava.setConfiguration(jhandle, 1) which returns -5, an error.

Can I see the code for USBView or perhaps the testlibusb-win source. I assume that these must do a setConfiguration and I could see what I am doing wroing.

Can you still use ch.ntb.usb-0.5.9.jar?

Urs Graf — Sun, 01 Oct 2017 19:22:27 -0000

No, that won't be possible as the API changed. Please get the new jar file and try again. The linker should be able to successfully resolve all links.

Can you still use ch.ntb.usb-0.5.9.jar?

Ronald R Berliner — Fri, 29 Sep 2017 20:37:58 -0000

I have been trying to get LibusbJava-1_1 to work on both Win7 and Ubuntu 16.04 without success. I have tried both jdk7 and jdk8 on windows and openjdk7 on a VirtualBox Ubuntu 14.04 guest.

I cannot find anything I have done wrong following the instructions from http://libusb-java.ch/installation/start

Both the Win7 and Ubuntu installations give errors on starting my application program that are quite similar:

Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: ch.ntb.usb.LibusbJava.usb_error_no(I)I
at ch.ntb.usb.LibusbJava.usb_error_no(Native Method)

My priogram uses ch.ntb.usb-0.5.9.jar and the classes exposed there. These classes do not seem to be included in the API that is shown at http://api.libusb-java.ch/

Hence my question. Should I still be able to use ch.ntb.usb-0.5.9.jar?

Thank you for your help in advance.

Any comments would be appreciated.

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