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MSS calculation data storage memory capacity and cycle of transfer from MSS to PC

Hiroyuki Kanematu
Expert 2975 points
Other Parts Discussed in Thread: AWR1843

Hi, I'm using AWR1843 Boost.

Transfers one frame of arithmetic data from DSS to MSS.
How much memory is the MSS at this time? (I think it's 512KB)

How often can the calculation data stored in the MSS be transferred to the PC?

(What are the maximum and minimum values?)

  • +1
    TI__Guru*** 147854 points

    Hi,

    The mmWave SDK demo uses UART to transfer data results for each frame to PC.

    In the SDK demo the data is transferred ONE TIME per frame AFTER the frame processing is completed and the data is AVAILABLE.

    The size of the data transferred data is usually a few Kb of memory. We do NOT transfer 512KB of data.

    The amount of data that can be transferred is limited by the speed of the UART. 921600 bits/sec

    Thank you
    Cesar

  • 0 in reply to Cesar
    Expert 2975 points

    thank you for your reply.

    1. You said.
    In the SDK demo, the data is transferred once per frame after the frame processing is complete and the data is available.

    Is the specification to transfer this one frame of arithmetic data to a PC absolutely fixed?

    2. You said.
    The size of the data transferred is typically a few kilobytes of memory. 512KB of data will not be transferred.
    The amount of data that can be transferred is limited by the speed of the UART.

    What I'm asking is how many seconds it is possible to send the calculation result to the PC. (Example: Every second)
    However, that depends on the actual amount of data.

    3. New question
    Is the work of transferring data from MSS to PC or data transfer from DSS to MSS done independently?
    Or is it in a standby state?

  • +1 in reply to Hiroyuki Kanematu
    TI__Guru*** 147854 points

    1) This is how it is implemented based on SDK demo requirements. A user can modify the code and implement it differently if needed

    2) The data is sent every frame. A frame could be 50ms or 100ms.

    3) If the data to be transferred is stored in DSP L2mem, it will be copied to shared HSRAM. Then it will be transferred from HSRAM to PC.

    If the data to be transferred is stored in L3RAM, than it will be transferred directly from L3RAM. It is not copied to HSRAM

    Thank you

    Cesar