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TMS320F28075: ePWM configuration

Oba
Genius 17295 points
Part Number: TMS320F28075

Hello

 

I have a question for ePWM configuration of F2803x/6x and F2807x.

 

I want to dynamically change HRPCTL[HRPE] and HRCNFG[EDGMODE] to make a complicated PWM/PFM pattern.

Is there any problem to dynamically change these bits during PWM running?

 

Regards,

Oba

  • 0
    TI__Genius 10820 points

    Obata-san,

    These configuration registers are typically not changed during run time. I believe you could change HRCNFG[EDGMODE] but must understand that during this change the PWM output may not be valid. It might be best to turn-off the PWM function completely when this change is being made. 

    I would strongly recommend against changing HRPE bits during runtime. If you want the output behavior to switch between hi-res period enabled and hi-res period disabled modes, I would suggest keeping HRPE enabled and writing a value of 0 in HRPRD registers when non-hi-res period mode is desired.

    - Hrishi