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AWR1642: configuration chirp by chirp

brickporter
Intellectual 335 points
Part Number: AWR1642

Hi:

in contrast to the mmwDemo or 1642 reference design of lab002 SRR, 

I would like to configure chirps with different parameters, ie., slope/amplitude/phase, in a frame. (shown in the following fig.)

Does awr1642 support this chirp configuration? 

Thanks

  

  • 0
    TI__Guru*** 148974 points

    Hi,

    Yes this is possible.

    There are 4 different programmable chirp profiles available to the user. In addition for each chirp additional finer configuration is available.

    So, there are some limitations but this is possible.

    Please see

  • 0 in reply to Cesar
    Prodigy 150 points

    Hi,

    Its not clear how to program these statically and dynamically ?  Using profile ram supports only 4,

    and chirp ram 512 chirps. What is the connection between chirp ram and profile ram.

    How to change chirp parameters at run time ? Since the duration between two consecutive chirp is

    2 micro sec (us) how to inform these at runtime ?

    Please send the details.

  • 0 in reply to Cesar
    Intellectual 335 points

    Hi Cesar:

    Thank you for the quick reply.

    Although this chirp configuration can be achieved, I have no clue how to implement the configuration. 

    Do you mind explaining more detail or providing some examples/documents?

    Thanks.

     

  • 0 in reply to brickporter
    Intellectual 335 points

    Hi Cesar:

    Anther question is where the chirp RAM and profile RAM are.

    RF system? BSS system? or ?

    Thanks

     

  • 0 in reply to brickporter
    TI__Mastermind 24955 points

    Stan,

    To program a chirp, you use one of the 4 profiles that were defined first.

    The process for building a radar frame consists of:

    1. Define a Profile
    2. Define a Chirp based on a Profile
    3. Build a frame based on the defined chirps

    So for example, let's say that you have two profiles defined, profile A and profile B. And then you define two chirps, chirp #1 and chirp #2. You can associate profile A with chirp #1 and then associate profile B with chirp #2.

    Then when you build a frame, you can have it consist of chirp #1 and chirp #2, and have that loop through a set number of times. This is all done before the sensor begins chirping, so it is not done dynamically.

    The chirp and profile information are stored in the MSS and then transmitted to the BSS.

    Regards,
    Kyle

  • 0 in reply to Kyle Cousino
    Intellectual 335 points

    hi Kyle:

    Thanks for your detail and clear reply.

    I have learned a lot from you.

    Sincerely,

    Stan