Raspberry Pi Forums

PeterO

Can you write where was the problem? Sorry I don't know what the problems were other then it was something to do with the mailbox code in the firmware and the cache configuration for the fft. https://pbs.twimg.com/media/BnWyfjZIQAESdYR.png That is a 1024 point FFT being computed and displayed 20 ti...

PeterO

Just a quick update... Thanks to Andrew and dom this is now working

I believe some uber-gpu-foo was used to fix the problems

Now I can get on with my code

PeterO

PeterO

I'm getting help from Andrew Holme (author of the gpu_fft code) and things are looking promising

PeterO

PeterO

I guess no one else has tried this because first indications are that it is totally broken :-( Running hello_fft while an openGLES application is running stops the openGLES application dead, and it won't run again until the PI is rebooted. And until the reboot the fft won't work again either ! This ...

PeterO

Before I go any further with a project I though I would ask if anyone has had any problems using openGLES and the GPU FFT functions in the same application ?

PeterO

PeterO

Was it this ?

http://www.bbc.co.uk/news/education-25648769

PeterO

PeterO

Start with the example alsa code that plays a single tone :
http://www.alsa-project.org/alsa-doc/al ... ample.html
PeterO

PS: You may need to run it as "pasuspender ./pcm"

PeterO

PeterO

I've not done any openGLES work for many months, yet I'm still helping people

Glad to be of assistance

PeterO

PeterO

If you are interested in the history of computing, there is a very interesting set of papers about the early versions of Unix on this web site:
http://www3.alcatel-lucent.com/bstj/vol ... sue06.html
PeterO

PeterO

Using "find" can select files and ignore directories even if they have the same name....

find . -type f -name 10-1234* <<< finds files
find . -type d -name 10-1234* <<<< finds directories

But your example suggests that files have .doc or .pdf extensions so there is no name clashes.

PeterO

PeterO

The "find" command may help. "man find" and look at the -exec option.

PeterO

PeterO

National Museum of Computing article mentioning Eben's visit to our 1st Anniversary Rasperry Jam
http://www.tnmoc.org/news/notes-museum/ ... ends-tnmoc
PeterO

PeterO

We also tied up with BBC 3 counties radio station for their "treasure hunt" programme.
Details here on The National Museum of Computing's web site: http://www.tnmoc.org/news/notes-museum/ ... ends-tnmoc
PeterO

PeterO

Thanks to everyone that came today. I hope you al had an enjoyable and enlightening time. Special thanks to Eben for his support (I think I even got the spelling right this time! D'OH!).

Serious work this cake cutting you know

PeterO

PeterO

JeffD wrote: Is it a problem of not compiling or you did not see the effect you wanted?

From OP's wording I would guess it is a permissions problem as ISTR everything in /opt/vc is owned by root.

PeterO

PeterO

Still time to get your tickets

A Special Cake is being baked, and Liz and Ebon are coming to join us

PeterO

PeterO

Don't miss your chance to meet Liz and Ebon !

Get your free tickets from here:
https://www.eventbrite.com/event/7739538167

PeterO

On August the 25th we will be celebrating a year of Raspberry Jams at The National Museum of Computing.

We are expecting some very special guests

, and birthday cake

Get your free tickets from here:
https://www.eventbrite.com/event/7739538167

PeterO

Which files are in /etc/ld.so.conf.d will probably depend on what packages you have installed so copying it from someone else's machine may not be a "good idea".

PeterO

PeterO

Line 49 reads shader = glCreateShader ( type ); More than likely something has failed prior to that. Which is why I stated glGetError should be called after every gl function call. The behaviour (according to the link you posted) is that the first error to occur sets the flag and subsequent errors ...

PeterO

OtherCrashOverride wrote: You should call glGetError after every gl call except where its invalid to do so (between glBegin and glEnd).

OP is talking about OpenGL ES 2.0, so glBegin..glEnd is not appropriate,
PeterO

PeterO

That thread didn't really seem to cover the problem, I'm not looking for tutorials as my code runs fine using the Mesa library on ly laptop, the problem is being able to run it on the Pi. I have included the contents of the Common directory (from the GirHub repo) in my project and have included the...

PeterO

There is an openGL ES forum where this has bee n covered before....

http://www.raspberrypi.org/phpBB3/viewt ... 68&t=26452

Have you checked the memory split on your PI ?

PeterO

PeterO

Book your place at :
http://www.eventbrite.com/event/7401262375

We'll be making plans for the anniversary meeting.

PeterO

PeterO

"Summer Bytes" is a six-week themed festival of computing fun and games to be held at The National Museum of Computing during the school summer holidays. During the fifth week (21-25 Aug) we will be running a number of Raspberry Pi based workshops, and the week will culminate with our "First Anniver...

Search found 5926 matches

Re: GL ES with FFT: Any Problems ?

Re: GL ES with FFT: Any Problems ?

Re: GL ES with FFT: Any Problems ?

Re: GL ES with FFT: Any Problems ?

GL ES with FFT: Any Problems ? Works on PI2

Re: Eben on tv this morning

Re: Real-time audio out on a loop??

Re: Fragment shader sometimes not working as expected.

History: The roots of Raspbian

Re: bash: if file

Re: bash: if file

Re: News articles and blog posts about Raspberry Pi

Re: Milton Keynes First Aniversary Jam

Re: Milton Keynes First Aniversary Jam

Re: 3D opengl help

Re: Milton Keynes First Aniversary Jam

Re: Milton Keynes First Aniversary Jam

Milton Keynes First Aniversary Jam

Re: /etc/ld.so.conf.d

Re: OpenGL ES Issue

Re: OpenGL ES Issue

Re: OpenGL ES Issue

Re: OpenGL ES Issue

12th Milton Keynes Jam

Summer Events at The National Museum of Computing