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TMS320F28069: HRPWM, up-down count mode: Setting duty step as one TBCLK per one CMPA change.

Hideaki Nambu
Mastermind 9165 points

Part Number: TMS320F28069

Hello,

Is it possible to set as titled ?  I think it is normally two TBCLKs per CMPA increment.

My customer asked that.

We have the following ideas, but I needed to ask the titled question.

Other ideas:

* Add 0x80 to the CMPAHR portion of CMPA:CMPAHR.

* Change the mode from up-down to up >> This is not accepted due to an impact to deadband control.

  • 0
    TI__Genius 15260 points

    Hi Hideaki,

    You should be able to achieve what you are looking to do with the HRPWM by using the CMPAHR extension register.  It sounds like you have a pretty good grasp of the topic.

    You will essentially just use the HRMSTEP register programmed by the SFO to determine the value to program into CMPAHR.

    EDIT: Can you clarify what the end goal of the customer is? Are they trying to have consecutive CMP events on each TBCLK?

    Regards,

    Kris