Search found 371 matches

by esmetaman
Sat Apr 21, 2018 9:48 am
Forum: EV3 Software
Topic: How do I update OpenCV 2.4.11?
Replies: 5
Views: 30

Re: How do I update OpenCV 2.4.11?

It is not necessary to move to Python to use a latest OpenCV version.

Take a look this Debian package:
https://packages.debian.org/search?suit ... pencv+java
https://packages.debian.org/buster/libopencv3.2-java

Juan Antonio
by esmetaman
Tue Apr 03, 2018 8:52 pm
Forum: EV3 Software
Topic: nxtcamV5 line tracing issue
Replies: 3
Views: 54

Re: nxtcamV5 line tracing issue

Hi, Some months ago, I implemented the support for NXTCamV5 for EV3. You have the sources and examples here: https://github.com/ev3dev-lang-java/lejos-support/tree/develop/src/main/java/lejos/hardware/device https://github.com/ev3dev-lang-java/lejos-support/tree/develop/src/main/java/examples/nxtcam...
by esmetaman
Tue Apr 03, 2018 8:43 pm
Forum: EV3 Software
Topic: ev3 Is it possible to play back images and sounds in Lejos?
Replies: 3
Views: 54

Re: ev3 Is it possible to play back images and sounds in Lejos?

Hi, Using this Java library in top of EV3Dev, it is possible. Review this examples: https://github.com/ev3dev-lang-java/examples/tree/master/ev3dev-lang-java/src/main/java/ev3dev/actuators Indeed, this class uses a PNG: https://github.com/ev3dev-lang-java/ev3dev-lang-java/tree/develop/src/main/resou...
by esmetaman
Wed Mar 28, 2018 6:45 am
Forum: EV3 Software
Topic: OpenJDK 10 Support for EV3 Brick
Replies: 0
Views: 54

OpenJDK 10 Support for EV3 Brick

Hi mates, It is available to test and use OpenJDK 10 for EV3 Brick. https://pbs.twimg.com/media/DZWvfESXcAAWeZs.jpg After some iterations with the project, we have a stable repo to build custom JRE for EV3 Brick on top of EV3Dev, a Debian distro. We could follow the JEP 322 and release a new JRE eve...
by esmetaman
Tue Mar 27, 2018 6:29 pm
Forum: EV3 Software
Topic: EV3 + LeJOS + Kotlin + intellij: seeking collaboration
Replies: 1
Views: 106

Re: EV3 + LeJOS + Kotlin + intellij: seeking collaboration

If you like, you can build your examples on Java 9 and soon in Java 10 for EV3 Brick & Brick Pi 3 using the LeJOS port on EV3Dev: https://github.com/ev3dev-lang-java/ev3dev-lang-java Last week, we started the migration to Debian Stretch. Latest stable version is v0.7.0 for Debian Jessie. Cheers ...
by esmetaman
Sat Mar 24, 2018 11:39 pm
Forum: EV3 Software
Topic: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor
Replies: 2
Views: 42

Re: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor

Many thanks Andy for the clarification, I will try to implement both methods using the EV3Dev API: http://docs.ev3dev.org/projects/lego-linux-drivers/en/ev3dev-jessie/sensor_data.html#lego-ev3-us-modes Related issue: https://github.com/ev3dev-lang-java/ev3dev-lang-java/issues/436 Cheers Juan Antonio
by esmetaman
Sat Mar 24, 2018 6:43 pm
Forum: EV3 Software
Topic: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor
Replies: 2
Views: 42

What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor

Hi Andy, The EV3 Sensor Ultrasonic Sensor has 2 methods: enable & disable: http://www.lejos.org/ev3/docs/lejos/hardware/sensor/EV3UltrasonicSensor.html And I would like to know what is the use case for that methods. Reviewed other EV3Sensors, I didn´t see that methods: http://www.lejos.org/ev3/d...
by esmetaman
Tue Mar 13, 2018 8:04 am
Forum: EV3 Software
Topic: Can leJOS run on ev3dev?
Replies: 33
Views: 7241

Re: Can leJOS run on ev3dev?

For 2018, this issue try to collect all possible suggestion to improve in the project.
https://github.com/ev3dev-lang-java/ev3 ... issues/413

Any comment is welcome.

Juan Antonio
by esmetaman
Thu Feb 22, 2018 6:28 pm
Forum: EV3 Software
Topic: Runtime Error on All Uploads from Eclipse: "java.lang.UnsupportedClassVersionError"
Replies: 13
Views: 4394

Re: Runtime Error on All Uploads from Eclipse: "java.lang.UnsupportedClassVersionError"

Hi Andy, in my opinion, leJOS is not only a set of libraries, it is a way to build software for robots with Java. Now, it is true that ROS is everything but it requires wrapper libraries and other stuff. In EV3 Side, Python is Strong in this generation but the development is less powerful than LeJOS...
by esmetaman
Wed Jan 10, 2018 4:25 pm
Forum: EV3 Software
Topic: JDK 9 Support
Replies: 13
Views: 888

Re: JDK 9 Support

Hi Andy, in my tests once I execute this statement: java -Xshare:dump The performance is the same than Oracle JRE8 on EV3. (I am impressed. The results with OpenJDK 8 was poor) https://github.com/ev3dev-lang-java/jvm-benchmark This week, I start using the JRE 9 and I didn't find any problem: https:/...
by esmetaman
Tue Jan 09, 2018 9:57 pm
Forum: EV3 Software
Topic: JDK 9 Support
Replies: 13
Views: 888

Re: JDK 9 Support

I think that Oracle could certificate his own version of Oracle JRE.
For the scenario of a build based on OpenJDK, "the certification" is the usage of the build by the community.

Juan Antonio
by esmetaman
Mon Jan 08, 2018 11:21 pm
Forum: EV3 Software
Topic: JDK 9 Support
Replies: 13
Views: 888

Re: JDK 9 Support

Happy new year!!! From today, any LeJOS user can install Java 9 in JDK/JRE versions for EV3 Brick: https://github.com/ev3dev-lang-java/openjdk-9-ev3 https://github.com/ev3dev-lang-java/openjdk-9-ev3/releases Excellent work with the Docker image to cross compile OpenJDK 9 for EV3: @linuxtardis (Jakub...
by esmetaman
Sun Sep 24, 2017 7:59 pm
Forum: EV3 Software
Topic: JDK 9 Support
Replies: 13
Views: 888

Re: JDK 9 Support

I am trying to build for EV3 with OpenJ9 a JVM for Java 9 from Eclipse foundation: http://www.eclipse.org/openj9/ Eclipse OpenJ9 is a high performance, scalable, Java virtual machine (JVM) implementation that represents hundreds of person-years of effort. Contributed to the Eclipse project by IBM, t...
by esmetaman
Fri Sep 08, 2017 4:38 pm
Forum: EV3 Software
Topic: Doubt about package lejos.internal.dbus
Replies: 2
Views: 232

Re: Doubt about package lejos.internal.dbus

Hi @Andy, yes, the question was about the architecture behind the classes. In some point, maybe in 3 months more or less, I will add that support and I would like to check with you the current approach to copy. In the past, I used the classes in a intensive way for NXT and for EV3 a bit, but I didn´...

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