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AWR1843BOOST: AWR1843 MRR Demo - Parking assist TLV

Rick Policy
Prodigy 130 points
Part Number: AWR1843BOOST
Other Parts Discussed in Thread: AWR1843

I have been exploring the AWR1843 MRR Demo for the past several weeks and noticed in the raw serial data that a TLV of "04" is sent in the USRR subframe (following the object data points TLV).  It always sends a total of 32 "int16" numbers with a Q format of 7.  Nearly all of the numbers convert to ~20 meters. 

I could not find this TLV documented anywhere in the documentation for the demo nor is it documented clearly in the code.  I spent quite a bit of time looking thru the code and it looks like it is tied to "parking assist".  It was not clear to me from the code what parking assist really means.

Where can I find the documentation for the Parking Assist TLV?   Or better yet, how can I turn it off?!

Regards,

Rick

  • 0
    TI__Guru*** 141284 points

    Hi,

    The Parking Assist TLV in the MRR demo is a feature that was used to define a "Free Space Grid" as shown in the video below.

    Short-range radar demonstration: Object clustering and tracking (youtube.com)

    If you don't need this feature, it is possible to remove the TLV in MRR_DSS_SendProcessOutputToMSS() (dss_main.c)

    thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 130 points

    Hi Cesar,

    I see that the video doesn't really show the mechanics of parking assist.  You can only see what is on the visualizer.   I would really like to know how to interpret the raw data.  However, I looked into some of the other demo documents and could not find it there either.  I find it very hard to believe that TI did not document the parking assist TLV somewhere. 

    Rick

  • 0 in reply to Rick Policy
    TI__Guru*** 141284 points

    Hi Rick,

    Not sure what the history is for not documenting this feature but I looked through the code and here is what the content of the Parking assist TLV is.

    For every angle bin (there are 32 of them), we transmit min(distance of the closest object or 20m). This is the reason why most values translate to 20m

    I hope this helps

    thank you

    Cesar