The library requires read-write access to the USB nodes, so try either
running the program as root or change the permissions on the
/dev/bus/usb/NNN/NNN nodes.
On Wed, Sep 23, 2009 at 5:31 PM, Andre Juffer <ajuf...@sun3.oulu.fi> wrote:
> Hello,
>
> I was wondering whether the JavaxUsb library would properly work on an
> AMD64 Linux box (running Lenny Debian). I have successfully compiled and
> installed the library, compiled all java sources from scratch (with Java
> 1.6) and everything seems to work.
>
> On the Linux box, 'lsusb -t' gives the following:
>
> Bus# 2
> `-Dev# 1 Vendor 0x1d6b Product 0x0002
> Bus# 1
> `-Dev# 1 Vendor 0x1d6b Product 0x0001
>
>
> If I run FindUsbDevice (one of the test classes) with for instance
> idVendor=0x1d6b, I get:
>
> Found 1 devices total.
> Found 0 devices with vendor ID 0x1d6b product ID 0xffff
> Found 1 devices with device class 0x09
> Found 0 devices with manufacturer string "This probably won't match
> anything"
>
> So, it apparently sees a device (I should note that nothing is connected
> to the USB ports).
>
> Running FindUsbDevice without any arguments, I get:
>
> Found 1 devices total.
> Found 1 devices with vendor ID 0xffff product ID 0xffff
> Found 1 devices with device class 0x09
> Found 0 devices with manufacturer string "This probably won't match
> anything"
>
> The difference really is the second line of the output with and without
> an argument. It apparently sees an device with vendorID 0xffff although
> there is one with ID 0x1d6b.
>
> The AMD64 Linux box also has a libusb-0.1.so.4 library. One possibly
> should use this library instead of libJavaxUsb.so. This library is also
> available for Window (see also http://www.libusb.org/). But its API may
> be completely different.
>
> My intention is get this all going also on a Windows box, but for now I
> rely on Linux to get a basic understanding of USB communication.
>
> Any suggestion or help is appreciated.
>
> Thanks,
>
> --
> Andre H. Juffer | Phone: +358-8-553 1161
> Biocenter Oulu and | Fax: +358-8-553-1141
> Department of Biochemistry | Email: andre.juf...@oulu.fi
> University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
> StruBioCat | WWW: www.strubiocat.oulu.fi
> NordProt | WWW: www.nordprot.org
> Triacle Biocomputing | WWW: www.triacle-bc.com
>
>
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