TMS320F280049: ECAP sometimes get capture value of zero

Sheldon He

Hi expert,

My customer is using ECAP to caputre external waveforms, they have enabled GPIO fitlering of three samples. May I know what are the possible cases for ECAP to get capture value of zero?

Configurations:

Thanks

Sheldon

over 5 years ago

0 Frank Ankapong over 5 years ago

TI__Mastermind 28275 points

Hi Sheldon,

We need more information to go off on. Which of the 4 events is capturing a zero?

0 Sheldon He over 5 years ago in reply to Frank Ankapong

TI__Expert 8585 points

Hi Frank,

ECAP2 and ECAP3 get zero value at the same time.

Thanks

Sheldon

0 Frank Ankapong over 5 years ago in reply to Sheldon He

TI__Mastermind 28275 points

Sheldon,

I'm assuming you meant EVENTS 2 and 3 get zeroes. Can you confirm which modes the events are running in: Is it absolute or delta mode? Also what is the status of the event overflow flag?

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TMS320F280049: ECAP sometimes get capture value of zero