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AWR1843BOOST: MatLab file error when attempting to post process data gathered on an AWR1843BOOST with the aid of the EVM1000EVAL and the mmWave Studio

Mark Passia
Prodigy 40 points
Part Number: AWR1843BOOST
Other Parts Discussed in Thread: AWR1843

Tool/software:

When working with the AWR1843BOOST I have run into some issues and have some questions. The main one being that as I suspect the mmWave studio does not create a file "Lane Config" without which the post processing does not work. 

After I did the StaticConfig, DataConfig I have armed the DCA1000 and triggered the frame up till here all went smooth and a binary file was created "adc_data.bin". However I am unable to view the plots generated in Post-Processing as I repeatedly get an error: "... MWMCR::EvaluateFunction error ... \n Reference to non-existent field 'LaneConfig'. \n Error in => process_adc_data.m at line 76.". Unfortunately I don't know how to resolve the issue and the related forum threads seem to include the issue of NO-LVDS data which is here not the case. I have installed matlab runtime engine specified in the mmWave studio guide "Processing utility within mmWaveStudio. in.mathworks.com/.../MCR_R2015aSP1_win32_installer.exe". Please also note that other settings were applied as instructed in the demo, with the exception of  the RDF LO bybpass which was selected as this is recommended in the AWR1843 guide.

The next question which I have concerns the SOP selectors and the red INERR led, which came on after I moved SOP0 = 1, SOP1 = 1 and SOP2 = 0 which I was instructed to do in the EVM1000 tutorial video, I just wonder whether this is a valid state as the documentation states that the debug mode is given by 011 which I assume corresponds to SOP0=0, , SOP1 = 1 and SOP2 = 1? But given that the chip worked with these setting I left it as such during the gathering of the data with the mmWave studio and I am quite sure that this has no relation to the matlab error. But I would be delighted if you could explain me the meaning of the INERR led and how does this relate to the SOP switches?

Finally, I received my AWR chip from the distributor two days ago with a defect and I am curious whether this is just an imperfection on the chip or whether it could (see the picture) affect functionality of the module?

Thank you in advance for your help! 

  • 0
    Prodigy 40 points

    Hi I have managed to solve the first issue, the answer to that is stated in the "mmWave Studio GUI" guide on page 25:

    "1. Matlab post processing supports data capture only in following modes a. 4 RX channel, 4 LVDS lanes b. 2 RX channels, 2 LVDS lanes c. 1 RX channel, 1 LVDS lane"

    Thus matching the number of rx elements to the available lvds lanes solved the issue. Although another one arrases: why am I not able to select more LVDS lanes than 2? 

  • +1 in reply to Mark Passia
    TI__Genius 14750 points

    Hi Mark,

    Mark Passia said:
    SOP0 = 1, SOP1 = 1 and SOP2 = 0

    This is the SOP 2 mode - debug mode.

    NERR LED glows if there is any HW error in the AWR device. Since the SOP mode that you tried to configure is invalid, you might have seen the NERR LED glowing.

    Mark Passia said:
    Although another one arrases: why am I not able to select more LVDS lanes than 2? 

    AWR1843 has 2 LVDS lanes. You can refer to AWR1843 Single-Chip 77 to 79GHz FMCW Radar Sensor datasheet (Rev. D).

    Regards,

    Samhitha

  • 0 in reply to Samhitha Bobba
    Prodigy 40 points

    Hi thank you for your answer, this does clarify the SOP and nrst light issue when, configured in a different SOP state the NRST LED is not on (example during operational mode when the mmWave Visualizer was running).

    I have tough another question concerning the LVDS lanes. Given that the board has 4RX channels and matlab post processing requires 4 LVDS lanes for post processing of 4 RX channels does that mean that for raw IQ data capture I will be able to only retire the data from 2 of these channels?

    (If yes then all 4 RX channels are available only to the boards MCU running the firmware?)

  • 0 in reply to Mark Passia
    TI__Genius 14750 points

    Hi Mark,

    Mark Passia said:
    Given that the board has 4RX channels and matlab post processing requires 4 LVDS lanes for post processing of 4 RX channels does that mean that for raw IQ data capture I will be able to only retire the data from 2 of these channels?

    There are only 2 LVDS lanes and the ADC data is captured from all the 4Rx channels. The ADC data (from 4Rx) is transmitted using the 2 LVDS lanes.

    Regards,

    Samhitha