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CCS/TMS570LS0432: Communication with PC and other UART device Software UART?

user5006446
Prodigy 50 points
Part Number: TMS570LS0432

Tool/software: Code Composer Studio

Hey there,

im using the above mentioned MCU on its Launchpad to communicate with the bq76pl455 BMS EVM over UART.

It is later planned to send the data over CAN but for now it would be nice to also send it to a PC via the serial interface.

In the documentation of the example Code it is stated that for communicating with the BMS the connection to the XDS Debug Probe should be "cut":

"Make sure that the resistor R8 is removed on the TMS570 Launchpad board." (SLVA635 page 4).

This however eliminates the possibility to communicate with the PC.

However in the documentation for the active Balancing Reference design a photo (attached) can be seen with the TMS570 connected both to the PC and the BMS (active balancing but the principle stays).

So i guess it is possible to connect the Launchpad to both, BMS and PC. Maybe with an additional Software UART?

  • 0
    TI__Guru 59540 points
    Hello User,

    the issue you are having is you are referencing two separate design materials. i.e., the SLVA635 is an application note from the BQ team outlining some basic operation using the LS0432 launchpad. It uses the SCI of the Hercules to communicate with the BQ EVM.

    The picture you have shown above, is from the TI design implementing active cell balancing. As outlined in it's design guide, it uses the SCI for communication with the PC and an emulated SCI using the NHET module for communication with the BQ device. Details of the TI Design including the SCI emulation code, gerbers, BOM, schematics, etc. can be found within the collateral for the TI design located at this link: www.ti.com/.../TIDM-TMS570BMS
  • 0 in reply to Chuck Davenport
    Prodigy 50 points

    Hey Chuck,

    thanks a lot for your answer. As suspected an additional Software UART is implemented.

    Thanks for the link to the Software. I must have overlooked it.

    Case closed. Back to work. ;)

    Greetings Henning