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Wireless audio : How to send the same data twice by two frequencys of CC2510 and TLV320AIC26

Angus Luo
Prodigy 60 points
Other Parts Discussed in Thread: TLV320AIC26, CC2510

Dear Sirs:

                 My project use a CC2510 and TLV320AIC26 to do a wireless audio.

                 Original:

                 I use 2 frequencys to send data in turn. But the performance is not good.

                If there is a disturbance frequency and the audio will be bad.

                Now:

                I want to send a data twice by this 2 frequencys every time.

               If a frequency is disturbed and the other frequency will be still clear .

               So the audio will be also good.

              Is it possible ?  How to do ?

 

  • 0
    Intellectual 320 points

    Angus,

     

    Why dont you do a clear channel assesment before you use any frequency?

    There are many Ti app notes which would help you to gain this.

    Once you get your list of channels, you will not have to use 2 frequencies to transmit the same information.

    - Mihir

  • 0 in reply to mdani
    Prodigy 60 points

    Hi,Mihir:

                Thanks for your reply.

                Yes,I already  find a clear channel frequency to hopping.

                First , I will read some RSSI valuse of servel frequencys to find two clear frequencys.

                I use these two frequencys to send data.   The phenomenon is ok.

               If one of these two frequencys is disturbed and the phenomenon is bad.

               Based on this situation, we think that if we always send data twice by these two frequencys.

               We can defend this situation when one frequency is disturbed. The phenomenon is still ok.

               My question is following:

               Rx:   how to sned data twice by these two frequencys ?

               Tx:   Slave receives the same data, how to check this data is same ?

                       Should slave pass or transfer this data to speaker  ?

              Tks.

       Angus.

     

     

  • 0 in reply to Angus Luo
    TI__Expert 3940 points

    Angus,

    Application note AN069 (http://focus.ti.com/general/docs/litabsmultiplefilelist.tsp?literatureNumber=swra237b) describes a system that uses two frequencies (that change from transmission to transmission) to redundantly transmit the same audio information and works very well.  The included example code is for an MSP430, but should provide a good starting point.

    -GrantC