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gary-rowe / hid4java

A cross-platform Java Native Access (JNA) wrapper for the libusb/hidapi library. Works out of the box on Windows/Mac/Linux.
MIT License
229 stars 71 forks source link

Support for ARM #27

Closed MaxRoma closed 9 years ago

MaxRoma commented 9 years ago

Hi! I am working on embedded application that is running on ARM Linux. Is there any instruction on how to enable hid4java on ARM environment? I was able to find manual only for javahidapi. Am I correct that SO file has to be saved under linux-arm/libhidapi.so inside hid4java-0.4.0.jar. And if so, is it possible to add pre-compiled library in hid4java repository for everyone else to use?

Take care, Max

gary-rowe commented 9 years ago

Yes. hid4java uses JNA under the covers and it defines the naming convention to use. You'll note from that file that linux-arm would be appropriate.

I've just pushed a more recent version of libhidapi on the develop branch based on an RPi compile. Can you clone and build locally (mvn clean install) and then use hid4java-develop-SNAPSHOT.jar in your project. Ideally it'll work out of the box.

If it doesn't then I'll see about running up a VirtualBox or similar to emulate a suitable ARM environment to expand the library but that may take some time due to other projects requiring attention.

MaxRoma commented 9 years ago

Hi!

Thank you for quick reply, you've saved my life) I've tested DEV version and it worked. Well at first it was complaining that there is no libudev.so.0 file (libudev.so.0 was replaced with libudev.so.1 from ubuntu 14.04 and forward). Nevertheless after applying this command sudo ln -sf /lib/arm-linux-gnueabihf/libudev.so.1 /lib/arm-linux-gnueabihf/libudev.so.0 everything started to work like a charm on ARM.

gary-rowe commented 9 years ago

No worries - glad I could help. This fix will go out in the 0.5.0 release which will probably be in late September judging by the downstream project driving development - MultiBit HD.

I'll update the dev notes to reflect the symlink - good catch.