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Original question:

EM1402EVM: causing issues battery connections in TIDM-TMS570BMS reference design

EM1402EVM: causing issues with connections in TIDM-TMS570BMS reference design

Elda Potter
Intellectual 440 points
Part Number: EM1402EVM
Other Parts Discussed in Thread: BQ76PL455A-Q1

Dear Sir/Madam:

  1. Does BQ76PL455A-Q1 GUI allow EM1402 EVM to perform active cell balancing?
  2. If it does, Does BQ76PL455A-Q1 allow EM1402 EVM and Launchxl TMS57004 to perform active cell balancing together?
  3. If the answer to both of the above questions is "no", does CCS allow EM1402 EVM and Launchxl TMS57004 to perform active cell balancing together?

  • 0
    TI__Genius 11480 points

    Hi Elda,

    There is a reference design (TIDM-TMS570BMS) that uses the TMS570 UART port to communicate to the pl455, and to bit-bang SPI communication to the EMB chipset using the pl455 GPIO. To communicate to the GUI, a second UART port is emulated using the NHET timers. This is a complicated setup, and I typically will recommend that the regular EM1402 example code is followed since it does not use the GUI/emulated UART port.

  • 0 in reply to David Wiest Jr
    Intellectual 440 points
    Hi Mr. Weist,

    To use the EM1402 example code I only need to follow the steps below correct?

    Import the folder

    Build project

    Debug

    If correct what results should I expect?

    Thank you
  • 0 in reply to Elda Potter
    TI__Genius 11480 points
    Hi Elda,

    Once the code has compiled and flashed onto your launchpad, you should see the LED on the EM1402 begin blinking as communication continues with the EMB chipset and pl455. You should also see current flowing from the cell being balanced into/from the 12V battery.\

    I recommend starting by setting breakpoints and stepping through the code to become familiar with it. I recommend a current probe on the 12V battery as well.