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IWR6843ISK: How to find issue on code support LVDS

user6378202
Intellectual 470 points

Part Number: IWR6843ISK

Hi,

1. I tried to add code to support RAW　ADC data output based on LVDS Interface.

2. My environment is:
IWR6843ISK EVM with DCA1000.
mmwave_sdk_03_03_00_03

3. I follow mmw which support LVDS fuction, add API follow "Implementation Notes" on section "Streaming data over LVDS"
C:\ti\mmwave_sdk_03_03_00_03\packages\ti\demo\xwr68xx\mmw

4. I can detected HSI clock signal, but can not detect HW data signal; It seems the API call are all correct,
is there simple method to find out the issue? Or is there steps to find the issue?

Thanks

  • 0
    TI__Mastermind 21025 points

    I would suggest running the mmw (OOB) demo from the pre-built binaries to make sure that you have no issues running it normally - getting the configuration sent to the board, chirping started and output flowing to the Visualizer.  You can be confident that you are running it correctly with LVDS.  Note also that there is an lvdsStreamCfg command - have you followed the steps in section 3.3.2 of the SDK's user guide?

  • 0 in reply to db_woodall
    Intellectual 470 points

    Hi, 

    I have do as you suggest yet before, all are correct. Then I port LVDS relative code followed the steps in section 3.3.2 of the SDK's user guide.

    It does not work correct, is there steps for debug the LVDS function ? I have no good idea on debug my LVDS port issue.

  • 0 in reply to user6378202
    TI__Mastermind 21025 points

    If the driver example works but the demo doesn't, then you will need to verify that the CBuff/HSI setup is the same in the demo as in the example code. You will need to look through the MSS source code looking for LVDS/CBuff/HSI setup, and make sure that there is no condition logic preventing it from executing (such as #defines, CLI parameter values, etc).

    You can also search the forum for similar issues.  Here is one related thread:

    https://e2e.ti.com/support/sensors/f/1023/t/810208

      -dave