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EM1402EVM: UART COMMUNICATION

GARGI PANCHOLI
Intellectual 440 points
Part Number: EM1402EVM
Other Parts Discussed in Thread: TMS570LS3137, TMS570LS0432

We have few question regarding active cell balancing. We connected batteries of EM1402EVM board to the power supply with the help of RC circuit and for this, battery gui is working and we are able to see cell voltages in gui. Now, the problem is when we connect UART communication ports of EM1402EVM board to the TMS570LS3137 MCU, battery gui is not opening. So, can you please guide us on this issue.

  • 0
    TI__Genius 11480 points
    Hi Gargi,

    This is very tough. The TMS570 only has 1 UART peripheral available, which is used to communicate to the bq76PL455.

    We do have a reference design in which a second UART peripheral was bit-banged using the NHET pins, in which the pl455 GUI was adapted to work with the EM1402EVM.

    This is by no means straightforward, but you may try to use this as a reference:

    www.ti.com/.../TIDM-TMS570BMS
  • 0 in reply to David Wiest Jr
    Intellectual 440 points

    Thanks for the reply sir,

    i am referring this module. but, this is for TMS570ls0432 and i am using TMS570ls3137 board.   

    i have done these connections for UART communication between MCU and bq76PL455, by referring these connection. i want to know whether, these connections are proper or not.

  • 0 in reply to GARGI PANCHOLI
    TI__Genius 11480 points

    Hi Gargi,

    I understand now, thank you for clarifying.

    Unfortunately, I think this question may be best asked in the TMS570 forum. This TIDM was a joint effort between my team (the battery management team) and the TMS570 team. I am not so familiar with this version of the TMS570 - the MCU team may be more capable of helping you figure out how to bit-bang the correct protocols with this particular device.