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

hongbo Yang

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

0 jagadish gundavarapu over 2 years ago

Hi Hongbo,

I started to be working on your issue and i will provide an update very soon.

Thanks & Regards,
Jagadish.

0 jagadish gundavarapu over 2 years ago in reply to jagadish gundavarapu

Hi Hongbo,

Can you please try by increasing VCLK3 frequency?

According to the datasheet the min pulse duration of ePWM is 33.33nS for output high or low

So 1000nS is with in the accept range only, so please try to increase the VCLK3 frequency and try again.

Thanks & Regards,
Jagadish.

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