How to write GPIOTE interrupt?

[Nils Minor]

Hi,

i need to stop one of my Timer at the falling edge of a Pin. So i need a gpiote_interrupt, is this right? Can someone help me how i can do this? if i write something like GPIOTE_IRQHandler ( ) it doesn't work.

best regards Nils

[ovrebekk]

Hi Nils

The following steps are required to use interrupts:

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

NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN0_Msk;

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

NVIC_EnableIRQ(GPIOTE_IRQn);

3. 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.

[Nils Minor]

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 :)

[Nils Minor]

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

[Stanley]

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

[Stanley]

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/.../