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Developing on the C6748 with TI-RTOS

Dean Hofstetter
Expert 2585 points
Other Parts Discussed in Thread: SYSBIOS, AM3352

CCSV6.1.2
DSP = C6748
SYSBIOS = V6.45.xx
XDCTOOLS = V3.32.xx
NDK = V2.25.xx

Our team has been living in the CCSV5.5 era up until this point.  Now that some of the components require CCSV6.1 (NDK for example), and we will soon start working with the AM3352, and we are hiring new employees, it is time we jump up to the latest and greatest TI tools.

TI is still promoting that the C6000 family is covered under TI-RTOS.  I just got an invite to a TI-RTOS workshop, and the C6000 is mentioned as one of the target boards.  I took this class a few years ago, and the C6000 support was lacking.  The workshop manual defines TI-RTOS as:  Kernel (SYSBIOS), TI Ware (drivers), and the File System / NDK / USB.  For the C6000 that definition is not true.  The TI Ware (drivers) part is missing, and now I've found out that the FatFS support has been removed from SYSBIOS and added to the TI Ware side (for which nothing exists for the C6000).

If you go to the TI-RTOS download page, the only TI-RTOS download for the C6000 is V2.00.01.23.  However if you look at the release notes for what is included for the C6000 it is only:  SYSBIOS, XDCTOOLS, UIA, and the NDK.  All of these can be downloaded separately, and again there are no drivers.

We are at a crossroads in our C6000 development.  The latest NDK(which we greatly rely on) now requires CCSV6.1 and SYSBIOS V6.45.xx.  The latest SYSBIOS and XDCTOOL also require CCSV6.1.  None of that would be so bad if FatFS wasn't removed from SYSBIOS.  For your other TI-RTOS products you've provided the appropriate low level driver link for FatFS to the SD card for example.  For the C6000, we can download the open source FatFS, but without driver support, I'm stuck.

Prior to SYSBIOS V6.45.xx the only way to connect FatFS to the SD card was using the BIOSPSP and EDMA3 drivers.  These packages are so old, and no longer supported.  Again poor C6000 support from a driver point of view.

Maybe I'm missing something, and there is an easy way to run the following on the C6748:  CCSV6.1, NDK V2.25.xx, FatFS, SYSBIOS V6.45.xx, and XDCTOOL 3.32.xx.  If so, please point me in the right direction.  If not, I need suggestions on how to proceed.

Thanks, Dean

  • 0
    TI__Genius 10260 points
    Hi Dean,

    The best way moving forward is to install each component individually, as you have mentioned above. There are no near-term plans for another TIRTOS for C6000 release.

    There are a couple of alternatives for FatFs: you can copy that package from your current installation into the new installation & rebuild SYSBIOS. The FatFs module will work exactly as before (config parameters can still be used), the only problem would be you have to add & rebuild this package whenever you move to a new BIOS. Alternatively, you can create your own CCS project which generates a FatFs library. This way, you need only rebuild a project whenever you move to another BIOS (no need to carry packages across). On the downside, Config parameters cannot be used, so if you used graphical config to modify FatFs, you need to add these to the compiler options.

    Unfortunately, there are no plans on providing low level drivers for the C6748. When moving to a new BIOS release, you will need to port any exiting code over.

    Regards,
    -- Emmanuel
  • 0 in reply to Emmanuel Trinidad - Alicea
    Expert 2585 points
    Disappointed, but not surprised. It sounds like we need to start looking for a new DSP/micro to develop on for our new products. It appears TI is putting the C6000 (or at least anything that is not C66x based) out to pasture. Perhaps TI will consider hiring some summer interns to come in and work on the C6000 low level drivers so they can be part of a proper TI-RTOS package. Wouldn't cost much, and if they failed, nothing really lost.

    - Dean