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6748 Eval board

steve gallagher
Intellectual 295 points
Other Parts Discussed in Thread: OMAP-L138, TMS320C6748, OMAPL138

Hi,

We're migrating our design from a 2812 to a higher performance processor. I've selected the 6748 DSP as the best candidate.

The only eval board I have found is the TMDSEVML138 - OMAP-L138/TMS320C6748 EVM.

I read in one discussion that you have to boot the ARM portion of the board and it boots the 6748.

Is this true even if we only use the 6748 portion of the eval board?

Thanks for any help,

Steve

  • 0
    TI__Guru* 84075 points

    Hi Steve

    The EVM kit that you pointed out comes with 2 SOMs (system on modules)

    • OMAP-L138 SOM-M1 (128 MB mDDR)
    • TMS320C6748 SOM-M1 (128 MB mDDR)
    OMAPL138 is an ARM+DSP device and C6748 is a DSP only device. So for 6748 , there is no ARM in the mix. 
    I have seen folks get confused by the C674x terminology OMAPL138 has a C674x DSP CPU core and an ARM9 CPU, C6748 only has a C674x DSP CPU core.
    Hope this helps.
    Regards
    Mukul 
  • 0
    Expert 1950 points

    Hello,

    In OMAP-L138, the bootloader is always executed by the ARM core, whilst keeping the C674x core in reset state. After bootloading, it's up to the ARM to program the C674x start address and put it out of reset.

    Nevertheless, it"s possible to automatically convert an AIS boot file generated for a TMS30C6748 to make it suitable for an OMAP-L138, forgetting ARM core. You'll have to extract the last instruction of the AIS file (DSP jump and close), and replacing it by some AIS instructions to set the DSP start address, to wake it up and make the ARM loop.

    Regards

  • 0 in reply to Mukul Bhatnagar
    Intellectual 295 points

    Thanks, 

    So I guess only one of those modules at a time can be mated to the mother board.