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Original question:

TMS570LC4357: Cannot get ADC triggered by SOCA/B event from ETPWM

TMS570LC4357: Cannot get ADC triggered by SOCA/B event from ETPWM when PWM period is too short

hongbo Yang
Intellectual 300 points
Part Number: TMS570LC4357

I cannot get SoCA/B event from PWM as described in this thread,

I finally find that the reason I cannot get the event is due to the configured PWM period is too short, as 1000ns

when I changed it to 6000000 as the code in this thread, the adc interrupt works.

I just want to ask, if is there any parameters specified in datasheet or somewhere said this limit?

or why it happens?

Thanks