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TMS320F28069: Difference between Action-Qualifier Software Force Register vs Action-Qualifier Continuous Software Force Register?

Shubham Kant Dubey
Intellectual 980 points
Part Number: TMS320F28069

Hi,

I have gone through epwm action Qualifier sub module in reference manual, I am confuse between Action-Qualifier Software Force Register vs Action-Qualifier Continuous Software Force Register. Please help me what is the difference between them. Could you please give example for both?

If I Forces a continuous high on output A by Action-Qualifier Continuous Software Force Register, after that CMPA = TBCTR event occur will it change the state of EPWMA or not?

Please not suggest technical reference manual, as I have already gone through it and it is confusing.

Thanks & Regards,

Shubham

  • 0
    TI__Mastermind 42195 points

    One is an instantaneous pulse, think of it like a one time even event. The other is continuous, and has latch like behavior. 

    AQSFRC's (software force)effect can be changed by a CMPx event. AQCSFRC(continious software force) will continue to force the condition despite other events.

    Regards,
    Cody 

  • 0 in reply to Cody Watkins
    Intellectual 980 points

    Hi,

    Thanks for the reply.

    If I forced continuous High on EPWMA,if I want to change the condition, will I need to reset the epwm module and reconfigure it?

    Regards,

    Shubham 

  • 0 in reply to Shubham Kant Dubey
    TI__Mastermind 42195 points

    You can write to the same bits and configure it to "do nothing". This will allow the module to continue to function normally.

    The software forces are usually used for workarounds or to synchronize weird parts of the software to the PWM events. In 90% or more of all systems you can use the other action qualifier events to do everything you need.

    Regards,
    Cody