GPIOTE manual clear

RE: GPIOTE manual clear

Hung Bui — Fri, 12 Aug 2016 11:35:49 GMT

Hi John,

Yes, if you for example only clear the interrupt flag at the end of the interrupt handler, any recurring happens before will not be caught.

RE: GPIOTE manual clear

Jong yoon lee — Fri, 12 Aug 2016 10:40:15 GMT

@Hung Bui Ok that makes total sense :) So if I clear a new gpiote interrupt while I am in the gpiote interrupt handler, I will be able to clear the interrupt and prevent the gpiote interrupt to be called once more because it has the same priority, right?! Thank you

RE: GPIOTE manual clear

Hung Bui — Fri, 12 Aug 2016 09:13:19 GMT

@JohnLee: It's not easy to clear an interrupt before the interrupt handle is executed.

You can only do that if you are in an another interrupt handler with same or higher priority.

If it's the case then the interrupt that has been cleared will not be able to trigger the IRQHandler().

If you are in the context with lower priority , for example in the main loop, then the IRQHandler() will preempt the normal routine and you can't clear the flag before IRQHandler() executed.

RE: GPIOTE manual clear

Jong yoon lee — Fri, 12 Aug 2016 03:48:04 GMT

Thank you for the solution. Do you any information about the second question I asked? Thank you

RE: GPIOTE manual clear

Martijn — Fri, 29 Jul 2016 09:56:42 GMT

you can clear NRF_GPIOTE->EVENT_PORT or NRF_GPIOTE->EVENTS_IN[x] manually by writing 0 to them.

NRF_GPIOTE->EVENT_PORT = 0;
NRF_GPIOTE->EVENTS_IN[0] = 0;
NRF_GPIOTE->EVENTS_IN[1] = 0;
NRF_GPIOTE->EVENTS_IN[2] = 0;
NRF_GPIOTE->EVENTS_IN[3] = 0;