Raspberry Pi Forums

arturo777

I'm also trying to get this working to link some TI SensorTags with my Pi. So far I've managed to bring up a lowpan interface using an OpenLabs Raspberry-Pi-802.15.4-radio by following the How to install 6LoWPAN Linux Kernel on Raspberry Pi guide, but haven't got any actual data going though just ye...

arturo777

Check out the ANGLE Project - Almost Native Graphics Layer Engine. https://code.google.com/p/angleproject/ The goal of ANGLE is to allow Windows users to seamlessly run WebGL and other OpenGL ES 2.0 content by translating OpenGL ES 2.0 API calls to DirectX 9 API calls. This will handle the graphics,...

arturo777

I guess you probably want to change the transform matrix, using a combination of vgGetMatrix, vgTranslate (and maybe vgRotate and vgScale) and vgLoadMatrix. This should allow you to redraw the same path in a different location without changing the underlying path. Drawing to a surface or texture wou...

arturo777

That's true, there is quite a lot of code to do something simple :shock: Actually, I mixed up my samples a bit, hello_triangle is simpler! I'm also a complete beginner, but I'll try to walk you through what I have learnt so far ;) Looking at the makefile in hello_triangle , it basically sets the spe...

arturo777

I'd suggest having a look at the triangle2 sample located here: https://github.com/raspberrypi/firmware/tree/master/opt/vc/src/hello_pi/hello_triangle2 It is also preinstalled on the pi, I think in /opt/vc/src/hello_pi/hello_triangle2 . To build this and the other samples in hello_pi , check out: ht...

arturo777

I just found another resource about Android platform development that is very interesting reading: A Practical Real-World Approach To Android Platform Development In ODROID . The guide is about getting Android going on the ODROID platform, however many of the issues are the same. http://com.odroid.c...

arturo777

Hi, It is only possible to start the system from an SD card - i.e. you must have one installed for the pi to work. This needs to have the firmware on it and the initial boot image (e.g. a kernel). Using special kernel parameters or UBoot (a secondary bootloader that provides more options - still in ...

arturo777

Talking about boot loaders etc, I have a question: Is it possible to boot a bare metal program using "kexec"? In theory this now exists for ARM. That would be an interesting way of developing on the Pi itself. Couple that with a little routine to reset the system after running the program, one could...

arturo777

Why is it crashing though, does Android log it anywhere? Depending how far along it got, logcat might be working, in which if you've got the android SDK installed, you can use: adb logcat This might be alittle tricker though, as you'd have to connect via ethernet rather than USB, which would requir...

arturo777

The reason I ask about which file system is because apparently an android kernel can be used to start an non-android one. Reading http://elinux.org/Android_on_OMAP#Kernel_configuration , it appears this makes it easier to iron out problems, although if it is failing so early on I guess it is never m...

arturo777

I narrowed it down to the CONFIG_ANDROID option. Whenever that one is enabled, I get the colour screen. It's in Device Drivers -> Staging -> Android. Its suboptions don't matter. Thanks :) Do you know what actually produces the colour screen? Question: are you try to start a "standard" file system,...

arturo777

What exactly does the infamous "colour screen" look like?

I'd like to check that we're seeing the same thing.

arturo777

Ok, I guess the next step is to use different patches...

I'm reading through this guide, maybe it helps: http://elinux.org/Android_on_OMAP#Patch_extraction

arturo777

Mine is here if you want to try, I won't be able to until tonight...

http://dl.dropbox.com/u/90715939/pi/ker ... roid_1.zip

I guess you are using the latest firmware if it works fine without the patches

arturo777

I just read over on the e-linux pi wiki that if you are using the older firmware, the compiled Image file needs to be converted with a python script. See http://elinux.org/RPi_Kernel_Compilation for details. The latest firmware doesn't have this restriction, it'll work with the standard Image or zIm...

arturo777

I managed to build an Android kernel using basically the steps outlined by Casey Anderson here: http://headlessandroid.blogspot.hu/2012/07/android-raspberry-pi-kernel-build.html It worked basically flawlessly! :D For anyone else doing this, here is what I did (but credits to Casey for the awesome gu...

arturo777

I have the same problem - the Pi seems to halt rather than to reboot (it turns off the HDMI).

I'm running the "Debian squeeze" image.

arturo777

Another tool chain is YAGARTO: "Yet another GNU ARM toolchain".

http://www.yagarto.de/

arturo777

...So will need to write USB stack or other input method or rig a pcb to use p/s2 keyboard.... I have been wondering about this exact same thing - how much effort it would be to get a USB keyboard going on bare metal. I've had a bit of a look at the Synopsys USB driver code being used and it looks ...

arturo777

It would be fantastic if a forum could be created specifically for bare metal development, as currently there are a lot of posts being written in many different forums, such as "Programming: General / beginners' discussion", "Programming: C/C++", "Programming: Other languages" and "Operating system ...

arturo777

Despite the ram limitation, ICS might be worth considering rather than Gingerbread. I have installed CyanogenMod 9 (actually miniCM9) on a Sony Xperia X8 for development work, which also has 256 MB (or less - I'm not quite sure, some sources say 168MB) and have been quite impressed. Most of the apps...

arturo777

<t>That's pretty interesting. Could you share some details about how that is running on the Galaxy Nexus? It looks like some sort of virtualization or emulation, judging from the Android UI visible at the top of the screen, which makes it quite a feat. In any case, the OSs, the...

arturo777

Dom, another highly knowledgeable individual has chimed in on this too:

It's just the default framebuffer (and it's programmable).

OGLES and H264 will be full colour.

Indicating that we'll be able to choose colour depth (and not be stuck with 16bbp)

arturo777

<t>Bakul said: A bit late to worry about this issue. While we wait a useful project might be to add code to qemu for a '-M raspi' option that emulates 2835 peripherals logic as per the datasheet. Plus a framebuffer. Such a thing would have a number of uses. <b...

arturo777

<t>I'm also looking forward to this challenge Initially I was a little disheartened by the complexity / binary "blob" issue, but now I realize that almost any device suffers from these issues and that the Raspberry Pi offers a special opportunity by collecting so many like-minded people....

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Re: Running IOT protocols like CoAP,6LowPan, RPL on Raspberr

Re: Developing for Pi in Visual Studio

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Re: USB HDD

Re: Adventures in bare metal

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Forum for bare metal programming

Re: Porting Android

Re: Aros on Raspberry Pi (ie. Amiga) photo on Arm Aros on Galaxy Nexus

Re: Boot menu to choose distro and/or memory model of choice.

Re: Please send some boards to important key developers without CE of FCC

Re: ARM Assembly / Operating System