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by jdobmeier
Mon Feb 25, 2013 8:08 pm
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

Since when did this thread's name change from "GPGPU on the pi" to "Boo-hoo if I can't have openCL screw you guys I'm going home" ? Here is a reality check: having programmed nontrivial tasks in OpenCL let me assure you that it is in no way a panacea which will rid data parallel algorithm implementa...
by jdobmeier
Wed Jul 18, 2012 1:55 pm
Forum: Other
Topic: Web OS (HP)?
Replies: 14
Views: 3712

Re: Web OS (HP)?

I must admit that for a hobby platform (where the point is to have fun doing interesting things of questionable usefullness for the sheer joy of hacking) this forum has a lot of naysayers. Perhaps someone should start a thread called "webos blows" or something then please confine your vitriol there.
by jdobmeier
Tue Jul 17, 2012 7:26 pm
Forum: Other
Topic: Web OS (HP)?
Replies: 14
Views: 3712

Re: Web OS (HP)?

right, but the Raspbian project is dedicated to porting ARMv7 debian packages to ARMv6
by jdobmeier
Thu Jul 12, 2012 4:56 pm
Forum: Other
Topic: Web OS (HP)?
Replies: 14
Views: 3712

Re: Web OS (HP)?

I wonder if a Debian ARMv7 hardfloat package could be put together, then mpthompson would build it for the Raspian distibution on his build cluster? Might be the path of least resistance since it was natively ARMv7 on the palm devices
by jdobmeier
Wed Jun 06, 2012 4:47 pm
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

apparently GPGPU is a controversial term and some purists believe it is out of reach for all mobile devices so I propose to define what I am doing as PiGPU, which is not to be confused with GPGPU proper. However, for the purposes of this forum I would like to stipulate that whenever GPGPU is mention...
by jdobmeier
Fri May 25, 2012 1:31 pm
Forum: General discussion
Topic: GPIO Programming Question
Replies: 59
Views: 24825

Re: GPIO Programming Question

If you use C instead of Python and compile there will be no "interpretation" stage when running the program. The issue stems from the lack of hard realtime in the kernel so you have no idea if your process will be preempted by the OS in the middle of controlling a GPIO pin, hence the jitter in respo...
by jdobmeier
Thu May 24, 2012 10:47 pm
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

how is the standard restrictive? On the contrary, it seems if anything more flexible in that both native floats and ints are not even required as long as one or the other is present. If there is hardware support for both then all the better performance wise. As far as the illegal operations of 5.1 i...
by jdobmeier
Thu May 24, 2012 9:04 pm
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

... there is no requirement that integers in the language map to an integer type in hardware. It is not expected that underlying hardware has full support for a wide range of integer operations. An OpenGL ES Shading Language implementation may convert integers to floats to operate on them. this is ...
by jdobmeier
Thu May 24, 2012 7:20 pm
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

lb are you possibly referring to the lack of fixed point real numbers on the iphone? GLfixed: Fixed point numbers are a way of storing real numbers using integers. This was a common optimization in 3D systems used because most computer processors are much faster at doing math with integers than with...
by jdobmeier
Thu May 24, 2012 5:28 am
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

Floats can be done just emulated with integer arithmetic, there are pretty good options out there for converting the question is whether the speed increase from the GPU isn't completely nullified in the process. My guess is there is some headroom left over, consider for n floats if it takes 4*n oper...
by jdobmeier
Thu May 24, 2012 4:50 am
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

by jdobmeier
Thu May 24, 2012 4:04 am
Forum: General discussion
Topic: GPGPU on the R-PI.
Replies: 75
Views: 53818

Re: GPGPU on the R-PI.

I'm pretty sure that the GPU is softfloat only but there are different/better ways to do the conversions (e.g. http://flip.gforge.inria.fr/). I would be happy with tutorials 0-3 from here: http://gpgpu.org/developer/legacy-gpgpu-graphics-apis, though if there is a software way to do 4 that would be ...
by jdobmeier
Wed May 16, 2012 5:59 pm
Forum: Troubleshooting
Topic: Pi Don't ... No.1 in a series of things to not do...
Replies: 23
Views: 12686

Re: Pi Don't ... No.1 in a series of things to not do...

It could be worth removing RG2, providing 3.32V to the GPIO power pins from a Bench Supply and seeing if anything good happens. It really depends on if you've totalled the regulator, the SoC, or everything. I tried this with an led/resistor on the tx pin but to no avail. The tx pin never even went ...
by jdobmeier
Fri May 11, 2012 8:58 pm
Forum: Troubleshooting
Topic: Pi Don't ... No.1 in a series of things to not do...
Replies: 23
Views: 12686

Re: Pi Don't ... No.1 in a series of things to not do...

<t>tufty said: <br/> <br/> <br/> Joe Schmoe said: <br/> <br/> <br/> I don't understand what good having a hot air soldering gun on the board would do.<br/> <br/> <br/> You mount it on the board, and any attempt by the user to connect random stuff to the GPIO results in burned fingers.  Admittedly, i...
by jdobmeier
Fri May 11, 2012 7:06 pm
Forum: Troubleshooting
Topic: Pi Don't ... No.1 in a series of things to not do...
Replies: 23
Views: 12686

Re: Pi Don't ... No.1 in a series of things to not do...

I think I can dig up a sacrificial linux box to read the console just on the off chance. Thanks, I'll try it.

Edit: I should mention that the power light is the only lit led.
by jdobmeier
Fri May 11, 2012 4:20 pm
Forum: Troubleshooting
Topic: Pi Don't ... No.1 in a series of things to not do...
Replies: 23
Views: 12686

Re: Pi Don't ... No.1 in a series of things to not do...

<t>rew said: <br/> <br/> <br/> But then again, it will be difficult to break the whole thing. It is likely you'll blow up a single output driver, but the rest will remain working.<br/> <br/> <br/> Unfortunately I seem to have the perhaps dubious distinction of being to first to actually admit bricki...
by jdobmeier
Fri Feb 24, 2012 10:40 pm
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 24129

Re: Inexpensive (Basic Graphics) LCD Display

<r>here is the same thing for people in the US:<br/> <br/> This digital picture frame runs Linux better than you might think<br/> <br/> <URL url="http://www.parrot.com/usa/prod.....pdf/df3120">http://www.parrot.com/usa/prod.....pdf/df3120</URL><br/> <br/> can connect over usb, comments on hackaday w...
by jdobmeier
Sat Dec 10, 2011 5:10 pm
Forum: Other projects
Topic: WebOS
Replies: 12
Views: 2854

Re: WebOS

as a user with extensive experience trying out the webosinternals tutorials and homebrew applications I can say without hesitation that this would be and excellent UI for the rasberry pi. I can't wait to order one and start hacking!!

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