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CC2564: scatternet support

Sriram V
Intellectual 955 points
Part Number: CC2564

hi,

I am interested in the scatternet feature. One as master and another as slave. Basically, I am looking at having 2 hfp connections active.

I wanted to check on the  software support to test this feature. Can anyone point me to the evm and extent of software support  in the stack.

thanks,

sriram

  • 0
    TI__Mastermind 20285 points
    Hi,
    Your quer has been assigned to the relevant expert.
    Please expect a follow up response on this.
    BR,
    Eyal
  • 0 in reply to Eyal Reizer
    Intellectual 955 points
    Hi Eyal,

    Did you get a chance to look into this?

    Thanks for your help and support.

    Regards,
    Sriram
  • 0
    TI__Expert 5285 points

    Hello Sriram,

    Sorry for the slow response i somehow missed this E2E post.

    A quick question first, are you trying to do it simultaneously because if that is the case I don't think this will work well.

    Once you are in a scatternet one link where you are master will work on the master clock times slots. 

    The one where you are slave will be aligned to it's master time slots which means they won't be aligned.

    Therefore every transition between these two different pico-nets will cost more slots because of this misalignment therefore i don't think 

    using two HFP will work well - there will be lost packets and the voice won't be optimal.

    If you would like to try this configuration please let me know and i'll point you to EVM board in our website and stack software.

    BR,

    Chen Loewy

  • 0 in reply to Chen Loewy
    Intellectual 955 points

    Hi Chen,

    1. We are trying the following configuration

       Phone <===> CC2564 <===> HFP Headset

    2. We plan to forward the packets as a first step. Do you forsee any quality issues for this usecase?

    3. I believe scatternet configuration suits the above configuration well. CC2564 claims that it can support 

       2 SCO simultaneously in scatternet, Can you let us know what configurations are tested and works 

       well in this case? Are there any caveats? 

    4. Also, Can you point to the evm and the software stack to test the same.

  • 0 in reply to Sriram V
    Intellectual 955 points
    Hi Chen,

    Any updates on this?

    Regards,
    Sriram
  • 0 in reply to Sriram V
    TI__Expert 5285 points
    Hello Sriram,

    From the way you describe the setup it seems the CC2564 behaves as a relay station.
    receiving the data from one end and forwarding it to another device.

    The CC256x can support 2 SCO simultaneously in a scatternet. However this is not optimal.
    I would make sure that both SCO are defined as 2EV3.
    The biggest problem with scatternet is that due to the fact that the different network clocks aren't aligned - even if you'll define the two channels in such a way that they will not overlap. their respective clocks will drift with time.

    Please check the: www.ti.com/.../CC2564C webpage. it will point you to all platforms it supports.

    BR,

    Chen Loewy