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by nealk2k3
Fri Jun 16, 2017 8:16 am
Forum: Other projects
Topic: Print to a Polaroid Zip
Replies: 2
Views: 1740

Print to a Polaroid Zip

I have a project whereby I'd like to print to a Polaroid Zip printer. If you haven't heard of one of those, it's a small, portable wireless printer that you can print to via bluetooth. There was a previous version called the Polaroid PoGo which someone managed to print to for a similar project. They...
by nealk2k3
Mon Apr 27, 2015 9:20 pm
Forum: Python
Topic: Pi3D over vnc
Replies: 4
Views: 1056

Re: Pi3D over vnc

OK, good to know. Thanks for your help
by nealk2k3
Mon Apr 27, 2015 8:57 pm
Forum: Python
Topic: Pi3D over vnc
Replies: 4
Views: 1056

Pi3D over vnc

I recently set up Pi3D on my Pi (a raspberry pi 2) and everything works fine when I hook it up to a screen via HDMI - I can run the demos and they behave as I would expect from the names. I usually access the Pi via vnc however, and when I connect in this method, I don't see any output from the prog...
by nealk2k3
Sat Feb 14, 2015 3:54 pm
Forum: Java
Topic: Java 3D on RPi2
Replies: 4
Views: 2494

Java 3D on RPi2

I have a Java 3D project that I have previously run on an original Raspberry Pi Model B which I'm now trying to get running on the Pi2. I've managed to find 'libjava3d-java' and 'libjava3d-jni' packages that the Pi2 running Raspbian was happy to install, but I can't get my program to run as I get th...
by nealk2k3
Mon Dec 23, 2013 11:02 pm
Forum: Java
Topic: Java 3D can only render via VNC
Replies: 0
Views: 850

Java 3D can only render via VNC

I have an application that uses Java 3D that I have been configuring on a Pi that has no monitor on it that I have connected to my network and have been accessing via VNC. I now have the application set up and running successfully in this way so I hooked the Pi up to a monitor as I ultimately want t...
by nealk2k3
Sun Dec 22, 2013 5:49 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

From stack overflow I have learned that the version of the native code I'm using is wrong - debian armhf requires armv7 or higher, and the Pi is armv6. There is a suitable package available in the Raspbian package repo though so I have that.

Next battle - it wants GLX version 1.3
by nealk2k3
Sun Dec 22, 2013 5:16 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

I tried giving the GPU 128MB - much more than that and there wasn't enough left to run the OS - but it still gave me the same error
by nealk2k3
Sun Dec 22, 2013 1:17 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

Some more detailed output from running with the Oracle JVM... java version "1.7.0_40" Java(TM) SE Runtime Environment (build 1.7.0_40-b43) Java HotSpot(TM) Client VM (build 24.0-b56, mixed mode) Running Cube # # A fatal error has been detected by the Java Runtime Environment: # # SIGILL (0x4) at pc=...
by nealk2k3
Sat Dec 21, 2013 3:41 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

I've just tried with open JDK 7 (1.7.0_25, 'Iced Tea' 2.3.10)
I get a slightly different error; 'fatal error: caught unhandled signal 4'
It's effectively the same; it crashes saying there was an error in native code
This happens with each of the three native code libraries I've mentioned above.
by nealk2k3
Sat Dec 21, 2013 2:39 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

I'm using a Java runtime that now ships with the Raspbian operating system.
I saw this post:
http://www.raspberrypi.org/archives/4920
which suggests that oracle now make a proper ARM compatible JDK.
I haven't tried a JDK from another vendor though, so I might give that a try next.
by nealk2k3
Sat Dec 21, 2013 12:40 pm
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Re: Segmentation fault with Java 3D

I have now tried compiling a very simple program, from this page: http://www.java3d.org/starting.html It's about as basic as you can get with Java 3D and it still gives me a segmentation fault. I also tried pulling different versions of the native ARM library; I've taken them from debian dfsg-8 and ...
by nealk2k3
Sat Dec 21, 2013 12:14 am
Forum: Java
Topic: Segmentation fault with Java 3D
Replies: 10
Views: 3379

Segmentation fault with Java 3D

I have a project written in Java using Java 3D that I'm trying to get running on my Pi - one of the older model B boards with 256MB of RAM. I currently have 32MB allocated to the GPU and the rest to the OS. I've downloaded the latest version of Raspbian that has Oracle Java 1.7.0_40-b43 pre installe...
by nealk2k3
Wed May 23, 2012 5:43 pm
Forum: Troubleshooting
Topic: usb WiFi woes
Replies: 9
Views: 3235

Re: usb WiFi woes

Well, the cable I had turned out to be using the standard cable colourings but not for the standard functions, so I actually ended up cutting a lot more than I intended. I took a USB extension cable, have the data wires attached to the plug at the other end, the +5v line connected straight to a benc...
by nealk2k3
Wed May 23, 2012 3:08 pm
Forum: Beginners
Topic: Working keyboard/touchpad combi
Replies: 5
Views: 4332

Re: Working keyboard/touchpad combi

I have a Rii that I'm using with my Pi. It's one of the older ones that comes with a 2.4GHz adapter, i.e. it doesn't use bluetooth like the newer ones seem to. I get mixed results with it to be honest; the same as you there is a lot of erratic behaviour, presumably caused by interference. Sometimes ...
by nealk2k3
Wed May 23, 2012 9:07 am
Forum: Troubleshooting
Topic: usb WiFi woes
Replies: 9
Views: 3235

Re: usb WiFi woes

I tried butchering a USB cable last night so that only the data lines went into the Pi, and the power lines went into a bench supply, but then the Pi says it can't enumerate the device - apparently it can tell if the power rails aren't connected, and apparently it cares for some reason. I think I'll...
by nealk2k3
Thu May 17, 2012 9:37 pm
Forum: Troubleshooting
Topic: usb WiFi woes
Replies: 9
Views: 3235

Re: usb WiFi woes

How did you get the power in directly from a power supply and also plug it into the Pi, do you have a deal-ended cable?
by nealk2k3
Thu May 17, 2012 8:16 pm
Forum: Troubleshooting
Topic: usb WiFi woes
Replies: 9
Views: 3235

usb WiFi woes

Hello Raspberry Pi forum goers, I have a problem I hope you can help me with. I have a TP-Link TL-WN821N usb wireless adapter. It is listed as verified working on the element 14 website, but I can't get it to work for me! I have followed the guide here: http://elinux.org/RPi_Peripherals#Wireless:_TP...

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