How to write GPIOTE interrupt?

RE: How to write GPIOTE interrupt?

Stanley — Tue, 02 Dec 2014 03:17:26 GMT

Hi Nils, I have tried another example to test the gpio interrupt as the following link, it worked as expected on button_1. devzone.nordicsemi.com/.../

RE: How to write GPIOTE interrupt?

Stanley — Tue, 02 Dec 2014 02:44:19 GMT

Hi Nils, I used the example code "pin_change_int_example" at SDK v6.1.0(softdevice v7.1.0) for gpio interrupt testing, it didn't work at all. I have tried the example what you mentioned, it didn't work too. Can you have any advices for me? Best regards. Stanley

RE: How to write GPIOTE interrupt?

Nils Minor — Fri, 20 Sep 2013 07:13:34 GMT

So in some parts of my code i use NVIC_EnableIRQ and not the soc methods, could this crash my device? And if i change this what you told me in the existing parts of my code like the PWM_MODUL it doesn't work anymore. No i have to check out how this works, can you give me some more help for this?

best regards Nils

RE: How to write GPIOTE interrupt?

Nils Minor — Fri, 20 Sep 2013 06:46:07 GMT

Hi, thank you for your answer, very helpful :).

If i use the Softdevice and doesn't use sd_nvic_EnableIRQ instead of NVIC_EnableIRQ what coudl happen? the sd methods are all in the SOC.h is there a docu of this?

How shoudl i do it with ppi?

best regards Nils :)

RE: How to write GPIOTE interrupt?

ovrebekk — Fri, 20 Sep 2013 06:37:35 GMT

Hi Nils

The following steps are required to use interrupts:

Tell the peripheral which events should generate interrupts, something like this:

NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN0_Msk;

Enable the peripheral in the NVIC (if you use the SoftDevice use the sd_nvic_EnableIRQ() instead):

NVIC_EnableIRQ(GPIOTE_IRQn);

Implement the interrupt handler, and remember to check/clear the event:

void GPIOTE_IRQHandler(void)
{
    if(NRF_GPIOTE->EVENTS_IN[0] != 0)
    {
        NRF_GPIOTE->EVENTS_IN[0] = 0;
        
        // Add your code here
    }
}

On a side note, have you considered using the PPI to stop the timer automatically on the GPIOTE event? Then you might not need the interrupt at all.