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Original question:

IWR1642BOOST: continuous wave mode

IWR1642BOOST: continuous wave mode

BO
Genius 12760 points
Part Number: IWR1642BOOST

Joe,

in the mentioned Continuous Mode just one RX antenna (channelCfg 2 1 0 ) is being read and stored in der variable gDataCube (data size is 0x20000).
If two RX antennas should be read (channelCfg 3 1 0) I am not sure how the data is stored. Is this data written sequentially in the variable (0x0 til 0x20000 and 0x20001 til 0x40000)?

Regards, Bernd

  • 0
    TI__Guru 50240 points
    Hi Bernd,

    I believe this is correct but I will provide confirmation from a team member in the next two days.


    Cheers,
    Akash
  • 0 in reply to Akash Gondalia
    TI__Genius 12760 points

    Akash,

    any feedback to my question?

    Regards, Bernd

  • 0 in reply to BO
    TI__Genius 12760 points

    Akash,

    a feedback is highly appreciated.

    Regards, Bernd

  • 0 in reply to BO
    TI__Guru 50240 points
    Hi Bernd,

    Sorry for the delay. I looked at the capture demo from that release and if you look at CaptureDemo_dataPathConfig() in ti\demo\xwr16xx\capture\common\capture_common.c, around line 1453: We setup the dma as follows:

    {
    /* Continuous Mode: */
    ptrDataPathObj->dmaConfig.dmaElemSize = ptrCaptureCfg->ctrlCfg.u.continuousModeCfg.dataTransSize *
    ptrDataPathObj->numBytePerSample * ptrDataPathObj->numRxChannel;
    }

    So DMA copies above amount of data (which is “dataTransSize” samples for all enabled RX channels) from the ADCBUF to gDataCube on every ADCBuf chirpAvail interrupt. The internal format of the data is same as what ADCBuf has which is equivalent to how BSS writes the data into ADCBuf .


    Cheers,
    Akash