Wake Up from external pins

[pietrodicastri]

Good morning

I wander if the LLWUP unit has to be gated to work. I do  not find a bit field to do so. Confirm it does not need.

For activating the interrupt of the LLWUP unit from external pin, It is necessary to:

1) enable the interrupt of the pins itself: -> PORT_HAL_SetPinIntMode(BOARD_SW_LLWU_BASE, BOARD_SW_LLWU_PIN, kPortIntFallingEdge);

2) enable the interrupt of the pin in the LLWUP unit -> LLWU_HAL_SetExternalInputPinMode(LLWU_BASE,kLlwuExternalPinDisabled, (llwu_wakeup_pin_t)BOARD_SW_LLWU_EXT_PIN);

Are all the previous actions necessary and sufficient???

Will the interrupt of the pin change requested or simply ignored in such initialization???

Thank You...

Pietro

[mjbcswitzerland · Accepted solution]

Pietro

See http://www.utasker.com/kinetis/FRDM-K64F.html

and

http://www.utasker.com/kinetis/LLWU.html

The LLWU has not clock gating. The unit's operation is activated when the processor enters the LLS mode.

You just need to enable the LLWU pin (or LLWU module) plus its interrupt to the NVIC.

Regards

Mark

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