• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 30 subscribers
  • Views 172 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.

IWR6843ISK:IWR6843ISK

lim jaewoo
Prodigy 140 points
Part Number: IWR6843ISK

I am using IWR6843ISK board and the 68xx_mmwave_sdk_dsp of out_of_box_demo as project code.


I have question.

I am using 2 chirp in one frame with LVDS stream.

I want to send different information each chirp at below code position (appExtensionHeader).

< code position >
MmwDemo_LVDSStream_MCB_t* streamMcb = &gMmwMssMCB.lvdsStream; 

streamMcb->hwSessionHSIHeader.sdkHeader.appExtensionHeader

but I don't know timing that i must change appExtensionHeader info for 2nd chirp.

when must i change appExtensionHeader info for 2nd chirp?

please explain that in detail. 

thank you.

  • 0
    TI__Expert 7510 points

    Dear Lim:

    Could you provide some information for me:

    1. What is your hardware setup? e.g. DCA1000 + IWR6843ISK

    2. What are you trying to accomplish at a high level. e.g. getting ADC data from the device into MATLAB.

    3. What kind of data are you gathering through LVDS. I am assuming raw ADC data, please verify.

    Best regards,

    Connor Desmond

  • 0 in reply to Connor Desmond
    Prodigy 140 points

    Dear Connor Desmond

    1. What is your hardware setup? e.g. DCA1000 + IWR6843ISK

        :  Yes  

    2. What are you trying to accomplish at a high level. e.g. getting ADC data from the device into MATLAB.

       : getting ADC data data from the device into Tool made by us.

    3. What kind of data are you gathering through LVDS. I am assuming raw ADC data, please verify.

        : ADC data including ADC header.

    Running is OK.  but I want to send different information each chirp at streamMcb->hwSessionHSIHeader.sdkHeader.appExtensionHeader.

    I can change appExtensionHeader information each frame.  but I can not change information each chirp correctly.

    please let me know how can i change information each chirp.

    thank you

  • 0 in reply to lim jaewoo
    TI__Expert 7510 points

    Lim:

    Can you please elaborate on what information per chirp that you would like to receive that is contained in the appExtensionHeader?

    Best,

    Connor Desmond

  • 0 in reply to Connor Desmond
    Prodigy 140 points

    Dear Connor Desmond

    I modified the many part of out_of_box_demo code.

    Modified code is running well.

    I want to send information per chirp at appExtensionHeader (for example :  chirp order information (1st, 2nd),  user specific information, etc.)

    I only want to know timing that i must change appExtensionHeader  information per chip.

    For example, after 1st chirp is sent with LVDS, i must change appExtensionHeader  information for 2nd chip.

    But, i don't know exact timing that i must change appExtensionHeader  information for 2nd chip.

    Let me know exact timing.  (for example.  interrupt after first chirp is sent with LVDS)

    thank you

  • +1 in reply to lim jaewoo
    TI__Expert 7510 points

    Lim:

    Here is a resource that provides a lot of information pertaining to what are the constraints on what kind of information can be received from LVDS. Anything that is outside of the normal operation of what is provided in our collateral is up to you to modify, but hopefully this gives you a starting point for your possible modifications:

    https://www.ti.com/lit/pdf/swra555

    Best regards,

    Connor Desmond