• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 316 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Data transfer from DSS to MSS

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

Which of the SDKs will be used to trigger the transfer of data from the DSS to the MSS after the chirp frame operation? (I think it's Framecfg.)

(I'm using AWR1843 Boost)

  • 0
    TI__Guru*** 148804 points

    Hi,

    The question you are asking is not clear enough. I will try to explain to you have the process of sending the result data from MSS through UART works

    In the SDK, the code knows that the frame is completed by counting the number of chirps that have been processed.

    For example for a MIMO configuration, if there are 32x3 chirps in the frame, the SDK code keeps a counter and knows when all the chirps processing has been completed.

    After that we need to transfer the data to the Host. The UART driver is running on the MSS.

    If the buffer we want to send through UART

    • is located in L3RAM, we don't copy it. The data is read from L3RAM and copied to the UART buffer
    • is located in L2RAM, the data is copied to HSRAM and from HSRAM it is copied to the UART driver
      • Notice that this is not cumpulsory. MSS can read the data from L2RAM, however we don't want to slow down the DSS memory access to L2RAM, that's why we copy the data to HSRAM

    Thank you

    Cesar

  • 0 in reply to Cesar
    Expert 2975 points

    Hello, thank you for answering the question.

    (You said)

    In the SDK, the code knows that the frame is completed by counting the number of chirps that have been processed.

    (I think)

    For the time being, it is possible to set with SW to transfer to MSS after calculating the chirp frame (Doppler FFT etc.).

    Which command do you use to set that setting?

    (You said)

    If the buffer we want to send through UART is located in L3RAM, we don't copy it.

    The data is read from L3RAM and copied to the UART buffer is located in L2RAM, the data is copied to HSRAM and from HSRAM it is copied to the UART driver

    (I think)

    This is the story when sending the calculation result to the PC

  • 0 in reply to Hiroyuki Kanematu
    TI__Guru*** 148804 points
    Hiroyuki Kanematu said:
    For the time being, it is possible to set with SW to transfer to MSS after calculating the chirp frame (Doppler FFT etc.).

    I am not clear what this means.

    What buffer would you like to transfer to MSS? Why?

    MSS is the master and can access all the memories.

    Thank you

    Cesar

  • 0 in reply to Cesar
    Expert 2975 points

    (You said)
    MSS is the master and can access all the memories.

    (私は答える)
    すいませんでした。そういえば以下のように述べられてましたよね

    If the buffer we want to send through UART is located in L3RAM, we don't copy it.

    The data is read from L3RAM and copied to the UART buffer is located in L2RAM, the data is copied to HSRAM and from HSRAM it is copied to the UART driver Notice that this is not cumpulsory.

    MSS can read the data from L2RAM, however we don't want to slow down the DSS memory access to L2RAM, that's why we copy the data to HSRAM

    By the way, does it mean that it is inside the SDK code that triggers the completion of all chirp operations in one frame and transfer to the PC? You said that there is something in your code that acts as a counter, right? Where is it written (in the SDK folder)

  • +1 in reply to Hiroyuki Kanematu
    TI__Guru*** 148804 points

    Hi,

    Please see dss_main.c, Line 555-600

    C:\ti\mmwave_sdk_03_05_00_04\packages\ti\demo\xwr18xx\mmw\dss\dss_main.c

    Thank you

    Cesar

  • 0 in reply to Cesar
    Expert 2975 points

    Hello, thank you for answering the question

    I'll check it.