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TMS320F28388D: How can one increase (or decrease) the frequency of a PWM signal over time?

Howard Li 2
Intellectual 871 points
Part Number: TMS320F28388D


Hi,

I am currently developing code for stepper motor control and I am using a PWM signal to drive the motor. One of the features I wish to develop is being able to define a motion profile. For the time being, I wish to implement the trapezoidal profile.

While I know how to change the timebased period using the EPWM_setTimeBasePeriod() function, I want to know if there are other ways to change the frequency over time other than to call the aforementioned function in an interrupt function that is triggered every CTR=0.