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IWR1443: IWR1443 FFT and CFAR questions

Mickey Zhang
Genius 12080 points
Part Number: IWR1443

Hi team,

The customer will use IWR1443. He has some questions for IWR1443 as below.

Q1: IWR1443 has the CORTEX R4 MCU, so, does the customer need to program for this MCU?

Q2: IWR1443 has the FFT and CFAR detection. If the customer needs to execute the FFT and CFAR detection, how to execute the FFT and CFAR detection?

Is enabled the corresponding registers to execute the FFT and CFAR detection?

Q3: Is the data that the FFT and CFAR has handled read through SPI? What isthe data that the FFT and CFAR has handled read?

Q4: For the "Figure 6-6. Data Packet Packing Format for 12-Bit Complex Configuration" of the datasheet, the customer said he does not understand.

Would you explain more about this?

Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments

  • 0
    TI__Guru 58035 points
    Hello Mickey,
    Depending on the user application they would have to have the corresponding R4F MCU code. They can use the mmw demo application as a good starting point which has an example MCU code. This code also configures the hardware accelerator to perform the FFT and CFAR detection. They can refer to that code as a reference.

    Regards,
    Vivek
  • 0 in reply to Vivek Dham
    TI__Genius 12080 points
    Hi Vivek,

    Thanks for your reply. For your reply ,would you explain more in details?

    For my Q1, you mean the customer should program for the IWR1443 internal MCU? Would you provide the example code that you said?

    For my Q2~Q4, would you explain them?
  • 0 in reply to Mickey Zhang
    TI__Genius 11405 points

    Hi Mickey,

    mmw demo which you can download from TI resource explorer, has example code which programs MCU and hardware accelerator for FFT and CFAR execution. For information on the implementation, you can refer to the mmwave_sdk_user_guide. Also in mmwave SDK, there's doxygen for each driver and demo. mmw demo doxygen is available at C:\ti\mmwave_sdk_01_00_00_05\packages\ti\demo\xwr14xx\mmw\docs\doxygen

    Hardware accelerator user guide can be downloaded from ti website: 

    In mmw demo, FFT and CFAR output is read through UART. mmwave demo visualizer is used for programming and display. 

    Figure 6-6 in datasheet shows the data packet packing format when used in CSI2 interface. It contains information of chirp profile and chirp number for each channel which followed by data samples from each channel. Let us know the specific questions customer has.

    Thanks and Regards,

    Michelle