USE NMI for GPIOTE

[AbdelZ18]

Hi,

I'm currently using an application that needs a very speed detection of GPIO and need to use NMI on GPIOTE.

I tryed to find how can I connect my NMI to GPIOTE but I didn't find how.

The only things I found is that the NMI is able to be connected to the "Memory Watch Unit (MWU)"

Is it possible de help be please to know I to do that.

Thanks

[Susheel Nuguru]

The NMI connection to MWU is a hardware design and we do not this feature for GPIOTE. If you want some specific condition in GPIOTE to trigger a NMI interrupt and if you have GPIOTE interrupt enabled you can do it like this

main()
{
   ...
    NVIC_SetPriority(NonMaskableInt_IRQn, some_priority)
    NVIC_EnableIRQ(NonMaskableInt_IRQn);
   ...
}

GPIOTE_irq_handler()
{
   ...
   if(your_GPIOTE_event_happened or someother_condition_is_true)
   {
       NVIC_SetPendingIRQ(NonMaskableInt_IRQn);
   }
   ...
]

[AbdelZ18]

Hi Aryan and thank you for you response,

You said that you don't provide the NMI on GPIOTE for the NRF5x, but you also said that I can trigger a NMI Irq on GPIOTE.

Is it possible to have more information about the Nonmaskable interrupt please.

Thank you

[Susheel Nuguru]

that is what i attached in the code snippet. It shows you how to trigger a NMI interrupt from GPIOTE interrupt.

[AbdelZ18]

But usually, when configuring an interrupt, we first connect the IRQ to the handler by using "Hal_InstallInterruptVector(NonMaskableInt_IRQn , my_Handler)" and then we enable the IRQ by "NVIC_EnableIRQ(NonMaskableInt_IRQn)" and in the code hook you posted I don't see that, could you explain more please.

[Susheel Nuguru]

when configuring an interrupt, we first connect the IRQ to the handler by using
"Hal_InstallInterruptVector(NonMaskableInt_IRQn , my_Handler)"

I am not familiar with that code that links the interrupt to your handler. But all that is more application specific. I was telling you the things you can do on the lowest software level.