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OMAP4 C64x DSP

Alireza Kenarsari Anhari
Intellectual 500 points

Hi!

I've been trying to gather information regarding the C64 DSP on OMAP4 (so called TESLA) . I would like to offload some math--intensive operations (e.g. FFT and IFFT) to this DSP from main ARM processor. I am running ice cream sandwich Android on the ARM.

I would appreciate if anybody can answer my following questions:

1- Does ice cream sandwich release utilize Tesla at all?

2- What is the usage of Tesla? (as I understood Ducati subsystem is being used for multimedia-related applications ...)

3- How can I get the source code of image running on Tesla? Alternatively, how can I add functionality to it?

4- From "http://omappedia.org/wiki/RPMsg_Tesla" I managed to get RPMsg code which runs on Tesla.

    4.1- Why Tesla is not supported in the master branch?

    4.2- I could not enable RPMsg support for Tesla in kernel as "make menuconfig" does not give me this option. (I checked out kernel according to instructions at L27.IS.2.P2    OMAP4 release page)

5- Why Tesla is not documented in OMAP's TRM?

Cheers,

--

Alireza Kenarsari

Software Engineer, Malaspina-Labs Inc.

http://www.malaspina-labs.com/

  • 0
    TI__Genius 10545 points

    Alireza;

    About #4.2 you need to change branches, if you do right click and "open in new tab" in next links it is going to open the repository

    from the instructions from L27IS.2.P2 you downloaded the Kernel source code using git://git.omapzoom.org/kernel/omap.git

    by doing "git branch -a" from ./kernel/android-3.0 you must be able to see next branches

      remotes/origin/p-android-3.1
      remotes/origin/p-android-omap-3.0

    i think it is using "git branch remotes/origin/p-android-omap-3.0" to switch branches and you must be able to see the changes.

    there are one example of Tesla code in the same link that you shared,

    http://omappedia.org/wiki/RPMsg_Tesla#Running_omx_sample

    and for general Ducati information read next post, i check and cannot find that much information about Tesla but it contains data on how to work with Ducati and create ducati-m3.bin to use it for sample applications,

    http://e2e.ti.com/support/omap/f/849/t/159530.aspx#606653

    by searching in omapedia.org using "rpmsg-omx" it founds some interesting links about RPmsg.

    About Tesla information please contact your TI representative for further documentation (www.ti.com + [TI wordwide] + "Contact Us").

  • 0 in reply to Manuel Contreras
    Intellectual 500 points

    Thanks a lot for your response. Now I have the answer to one of my questions  (which was an important one). But still I am a bit confused about this issue ...

    It seems like that Tesla support is not included in the official TI releases ... why?

    I am not sure what is actual functionality of it at the moment.  Would I be its sole user? (if I write an application for it)

  • 0 in reply to Alireza Kenarsari Anhari
    TI__Genius 10545 points

    I don't known much about Tesla, it's information it is not available in the public domain but you can contact a TI representative  if you go to www.ti.com + [TI wordwide] + "Contact Us" you can find some links to "Contact TI businesses and technical support", "Product Information Centers" and "Other contact options", and i think they can answer the rest of your questions.

    and try to check the code for omx_samples and RPMsg_Tesla code in kernel it can give you an idea of what is possible to do with it. Other option is to use SYSLink / ducati-m3.bin that there are some public instructions on how to work with it and it has a sample code to use too, it is in the last post's link to other post.