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IWR6843AOPEVM: No data on MSS Logger pin (IWR6843AOPEVM + mmWaveICBOOST) and guiMonitor command not recognized

Hajo Wolfram
Prodigy 10 points
Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: MMWAVEICBOOST

Tool/software:

I’m working with the IWR6843AOPEVM mounted on the mmWaveICBOOST carrier board running the 3D people tracking demo. I’m trying to send the tlv point‑cloud data directly from the “MSS logger” pin J6.9 to an STM32 via UART for parsing. However, I’m seeing no activity on this pin when the radar is running.

To debug this I tried adding a guiMonitor line to my configuration file. My understanding was that this command enables different TLV outputs on the UART, but when I send it over the CLI port the device replies with “command not recognized.” All of the other CLI commands (e.g. sensorStart, profileCfg, etc.) work as expected.

For reference, I have flashed the 3D people‑counting demo from the Radar Toolbox. The device boots normally and responds to configuration commands, but I can’t seem to get any data on the MSS logger pin, and guiMonitor is rejected. SOP switches are in functional mode, the board powers up correctly, and I’m connected to the correct pins on the mmWaveICBOOST board. I have also been able to receive UART data over the same setup on the STM32 at 921600 using an additional MCU to simulate sending data. 

My questions are:

  • Does the guiMonitor command only apply to the Out‑of‑Box demo? Is it unsupported in the people‑counting or occupancy‑detection labs?

  • Which firmware/labs actually use the MSS logger pin for data output? Can I only flash the Out‑of‑Box demo (or another specific demo) to get UART data on the logger port?

  • If I want to keep using the people‑counting demo, is there a way to enable data on the logger UART, or would I need to modify the source code?

Any guidance on which demo to use or how to configure the UART outputs would be appreciated.

  • 0
    TI__Mastermind 20451 points

    Hi, 

    My sincere apologies for the delay. 

    Have you already successfully run the people tracking lab with the boards connected to your computer and using the visualizer? 

    What are your switch settings on the boards? There are specific switch settings required in order to enable data output at J6.9 of the ICBOOST. I believe you will need S1.2 ON, S1.3 OFF on the ICBOOST. Please confirm with the MMWAVE-ICBOOST schematic (link). 

    Hajo Wolfram said:
    Does the guiMonitor command only apply to the Out‑of‑Box demo? Is it unsupported in the people‑counting or occupancy‑detection labs?

    It's not only the Out-of-Box demo, in fact most demos do support the guiMonitor command; however, the people tracking demo ...does not. In that demo only specific TLVs are supported which are output by default.

    Hajo Wolfram said:
    Which firmware/labs actually use the MSS logger pin for data output? Can I only flash the Out‑of‑Box demo (or another specific demo) to get UART data on the logger port?
    Hajo Wolfram said:
    is there a way to enable data on the logger UART, or would I need to modify the source code?

    This is not firmware/demo specific, any demo should be able to output data to this pin without any software changes. You just need to confirm MSS_LOGGER gets routed to the J6.9 pin instead of the XDS110 (for USB port).

    Best regards,

    Josh