TMS320F28388D: ECAP Module Rearm Feature Use Case?

Erhan(engineerhan)

Part Number: TMS320F28388D

Hi all!

I am trying to understand the purpose and potential use cases of the rearm feature of cap module. What I got is that it might be useful in one-shot mode when the event count is less than 4.

Do I need it also in continuous mode? Or why do i need rearm in general? Thanks in advance.

cheers,

over 3 years ago

+1 Santosh Jha over 3 years ago

TI__Guru 50611 points

Erhan,

Please take a look at section 24.5.3 Continuous/One-Shot Control in the Technical Reference Manual.

https://www.ti.com/lit/pdf/spruii0

Re-Arm operation is explained in this thread.

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/549234/28075-ecap-rearming-allows-only-cap1-to-capture-the-counter

Re-arming prepares the eCAP module for another capture sequence. Also, re-arming clears (to zero) the Mod4 counter and permits loading of CAP1-4 registers again, providing the CAPLDEN bit is set.

In continuous mode, the Mod4 counter continues to run (0->1->2->3->0, the one-shot action is ignored, and capture values continue to be written to CAP1-4 in a circular buffer sequence.

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TMS320F28388D: ECAP Module Rearm Feature Use Case?