topic STUCK IN NMI in S32K

STUCK IN NMI

hajianik — Thu, 13 Dec 2018 18:13:48 GMT

Hi,

My Target is S32K146.

I have configured PTD3 as NMI and corresponding ISR gets hit however I seem to be stuck in it.

I've configured the PTD3 PCR as a falling edge interrupt and yet it is acting as a level interrupt.

is there a status bit somewhere that needs to be cleared somewhere?

could someone please let me know if there is such bit that needs to be cleared.

Thanks

Re: STUCK IN NMI

danielmartynek — Mon, 17 Dec 2018 18:07:19 GMT

Hi Koorosh,

The PCR register does not configure the NMI functionality.
Yes, it is low-active.
There is NMIPENDSET bit in ICSR core register, but it gets cleared automatically when the handler is entered.

Please refer to ARM Cortex-M4 Devices Generic User Guide
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0553a/Cihfaaha.html

Regards,
Daniel

Re: STUCK IN NMI

hajianik — Wed, 19 Dec 2018 17:31:21 GMT

Hi Daniel,

Seems to me that NMI is a level sensitive(triggered) signal and not an EDGE triggered.

Is that correct?

Thanks

Re: STUCK IN NMI

danielmartynek — Wed, 19 Dec 2018 21:01:19 GMT

Hi Koorosh,

Yes, it is low-level sensitive, the signal has to go up, otherwise it will trigger again.

Regards,

Daniel