topic Re: LPC55S66 : wakeup reason in LPC Microcontrollers

LPC55S66 : wakeup reason

EugeneHiihtaja — Mon, 27 Jan 2020 18:56:08 GMT

Hi !

Is any fast way exists to know wakeup reason when CPU exit from API POWER_EnterPowerDown() ?

Some power API ?

Or we should analyze pending interrupts from list of uint64_t wakeup_interrupts what were specified ?

Regards,

Eugene

soledad — Fri, 31 Jan 2020 19:15:37 GMT

Hi,

Like you mentioned you should analyze pending interrupts in order to know what was.

Regards

Soledad

EugeneHiihtaja — Sat, 01 Feb 2020 08:27:32 GMT

Hi soledad‌ !

I'm using POWER_EnterPowerDown() on secure side and it called from nonsecure RTOS scheduler hook.

Nonsecure interrupts are disabled but secure not.

GIntx interrupts processed on secure side and when I have exit after POWER_EnterPowerDown(), GINTx

already occurs after 343us ( like in spec) but exit happens after 450 us and GINTx is not pending any more.

It means I should disale all interrupts and they will be not processed so fast as expected.

may be some POWER API can remember reason of last exit ?

Regards,

Eugene

diego_charles — Fri, 14 Feb 2020 16:41:33 GMT

Hello, Eugene,

Unfortunately, none of the fslpower power functions, from fslpower API is capable to retrieve the wake-up source.

Best regards, Diego.