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Original question:

BOOSTXL-PGA460: BusDemo Example Not Working/Inconsistencies

BOOSTXL-PGA460: Bus demo distance zero

Jeremiah Chen
Prodigy 10 points
Part Number: BOOSTXL-PGA460
Other Parts Discussed in Thread: ENERGIA

I'm doing the bus demo example sketch with pga460s. I found other posts that had a setup video and a written walkthrough for it. I can't get second board to show anything but repeating 0's. I have tried UART and OWU. I always set option 10 true to fix the threshold error. The gui shows each board has the right address for UART. Any help?  Thank you

  • 0
    TI__Genius 11015 points

    Jeremiah,

    We have received your question & will answer it before Wednesday.

  • 0
    Prodigy 80 points

    Jeremiah,

    I wrote that earlier post you mentioned and are referencing. I have done some minor experimenting and found out that I can get them to work with OWU but never with regular UART. Here's my setup to get them to work:

    First I set up the boards individually in the GUI - specifically, frequency, pulses, current, TVG, threshold (unfortunately, I think you can only get your master board to use the values stored and imported with USER_DATA1-16), and setting the boards to OWU and clicking no at the prompt. Update the UART address for the board if needed. Program EEPROM.

    Here's my serial monitor prompt choices. I'm not sure what will overwrite necessary values to make the second board not work correctly, but I know it's something other than options 4, 8, 10, and 13 like you might expect. So to be safe, you might want to try these exact values out first before changing anything.

    1) 2

    2) 0

    3) x

    4) x

    5) x

    6) x

    7) 1

    8) 0

    9) 0

    10) 1

    11) 2

    12) 0

    13) 0

    This exact process is the only one that I've found that makes both boards work correctly and keep as many GUI-defined values as possible. As I said before, I have not figured out a way to get standard UART to work, even if I change ONLY the relevant prompts: 1) to 0 and 12) to 1.

    Hope it helps! Maybe Akeem the Expert will have some advice for getting UART to work for either of us.

  • 0 in reply to Joseph Summers
    TI__Mastermind 27950 points

    Jeremiah,

    The link to the unofficial video for the bus demo may have expired, so I am re-enabling the link here:

    https://txn.box.com/s/wlaamohyxdk3932l81xiqokpppqudd3b

    Can you confirm that you have seen this video?

    A distance response of 0m usually indicates that the device is not properly powered or not communicating with the master (Energia busDemo).

    For debug purposes, can you try the following experiments independently, and let me know the outcome?:

    1. Only run the bus demo with the second board attached to the master controller (LaunchPad).
    2. Swap the UART_ADDR of the second board to '0', and the main board to '1'.

    Joseph, thanks for your supporting reply! I may need to create a similar video for the standard UART demo if you're having trouble.