Hi Mike, Excellent post, this really cleared a lot for me. Great time to experiment with this over the holidays. Much appriciated., Gijs
On Friday, December 20, 2013 2:56:03 PM UTC+1, Mike Bremford wrote: > > That's a Java ME class, and I expect you're running Java SE aren't you? > There's no reason that I'm aware of to run the micro-edition on hardware > like the BBB, it's easily got enough grunt to run the full JVM. > > I'm accessing GPIO, I2C, SPI from J2SE using JNA ( > https://github.com/twall/jna) which is working very well - it's a wrapper > around libc, much easier to work with than JNI, and because it's just libc > wrapped in Java you can do anything you can do in C - in particular, you > can poll() on filehandles, which means you can use the GPIOs through the > /sys/class/gpio interface. > > To preempt the next question, I've extracted a bit of code and put it as a > shar archive at http://pastebin.com/af3CRU5r. Download the raw content to > a shell script and run it, it will give you 5 Java source files. Compile > them with the "jna.jar" file from ther JNA project mentioned above. This is > an extract from a project I'm working on so in order to use it you'd need > to fill in a couple of blanks, namely the events that are being fired when > the GPIO changes value: search for "pubGPIO" to see where that happens. I'm > also using the GPIO overlays from https://github.com/nomel/beaglebone to > set pull-ups/pulldowns, although this isn't essential to the classes. The > I2C stuff is there for good measure but is also independent. And if you > want to do things completely differently, the POSIX.java file is my way > into libc via JNA, and doesn't depend on anything else. > > > On 20 December 2013 10:17, <gijsbert.s...@gmail.com <javascript:>> wrote: > >> I'm really puzzled. I've no problem gettig java to run on the beaglebone >> black, but I can't find an implementation for com.oracle.deviceaccess.* I >> would like to reference a GPIOPin.class from my java code and manupulate it >> directly. Anybody any clues? I'm pulling my hair out here... >> >> On Thursday, May 9, 2013 8:57:53 PM UTC+2, Andy St John wrote: >>> >>> This deploys openJDK 6 on beaglebone black. >>> >>> I could not get this to install successfully on the shipping image. >>> I flashed my board with *BBB-eMMC-flasher-2013.05.08 *then tried >>> installing all of the following packages as recommended in another post on >>> this forum, but encountered several issues. >>> >>> openjdk-6-common<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-common> >>> >>> openjdk-6-demo<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-demo> >>> >>> >>> openjdk-6-doc<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-doc> >>> >>> openjdk-6-java<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-java> >>> >>> >>> openjdk-6-jdk<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-jdk> >>> >>> openjdk-6-jre<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-jre> >>> >>> >>> openjdk-6-source<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-source> >>> >>> openjdk-6-vm-cacao<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-vm-cacao> >>> >>> >>> openjdk-6-vm-jamvm<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-vm-jamvm> >>> >>> openjdk-6-vm-zero<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-vm-zero> >>> >>> These are the packages I installed in the order I installed them. >>> openjdk-6-common<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-common> >>> openjdk-6-java<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-java> >>> openjdk-6-jre<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-jre> >>> openjdk-6-jdk<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-jdk> >>> openjdk-6-vm-jamvm<http://www.angstrom-distribution.org/repo/?pkgname=openjdk-6-vm-jamvm> >>> >>> The vm-zero package would not install due to a dependency issue (libffi5 >>> >= 3.0.10) >>> and vm-cacao installed without errors but a VM would not start >>> >>> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
