Configuring Interrupt falling edge not triggering the handler

RE: Configuring Interrupt falling edge not triggering the handler

MUTHUKUMAR V — Sat, 26 Nov 2022 16:01:40 GMT

Thanks Naeem!

This helps.

RE: Configuring Interrupt falling edge not triggering the handler

Naeem Maroof — Wed, 23 Nov 2022 15:01:00 GMT

Hi Muthukumar,

Good to know that your project is working.

As you have configured the pin, interrupt, and connected the callbacks. In the code, you can disable the interrupt by using instructions like:

//Disabling the interrupt
ret = gpio_pin_interrupt_configure_dt(&ex10_irq_st, GPIO_INT_DISABLE);
//Checking if disabled or not
if (ret != 0) {
    printk("Error %d: failed to DISABLE interrupt on %s pin %d\n",ret, button.port->name, button.pin);
    return;
}
printk("\r\nINT Disabled\n");

Regarding usage of irq_enable(irqn) and irq_disable(irqn) macros as defined in the Zephyr ISR APIs:
they require irqn, that is irq line number. You can obtain this irqn using DT_IRQN(nid) macro which takes node id and returns the irq number of that node. Use can use DT_NODELABEL(nlabel) to get the node label of nlabel node.

Regards,

Naeem

RE: Configuring Interrupt falling edge not triggering the handler

MUTHUKUMAR V — Tue, 22 Nov 2022 16:44:44 GMT

Thanks for your reply!

I can see it is getting called every time. I will keep you posted with details, if I observed this issue again.

Added to that, How to enable and disable the interrupt from the code?

After the initialization with the below steps.

ret = gpio_pin_configure_dt(&ex10_irq_st, GPIO_INPUT);

if (ret != 0) {

printk("Error %d: failed to configure %s pin %d\n",

ret, ex10_irq_st.port->name, ex10_irq_st.pin);

return;

}

ret = gpio_pin_interrupt_configure_dt(&ex10_irq_st, GPIO_INT_EDGE_FALLING);

if (ret != 0) {

printk("Error %d: failed to configure %s pin %d\n",

ret, ex10_irq_st.port->name, ex10_irq_st.pin);

return;

}

gpio_init_callback(&ex10_irq_cb, interrupt_handler, BIT(ex10_irq_st.pin));

gpio_add_callback(ex10_irq_st.port, &ex10_irq_cb);

I middle of our implementation, i need to enable and disable lot many times.

I can use the below API for enable and disable and it is safe to use in middle of the implementation?

gpio_pin_interrupt_configure_dt(&ex10_irq_st, GPIO_INT_EDGE_FALLING); // enable

gpio_pin_interrupt_configure_dt(&ex10_irq_st, GPIO_INT_DISABLE); // disable

or do we have any other means to enable/disable the interrupt?

I noticed irq_enable(irq number) as well in the documentation. if it ok to use, how can we get IRQ number from the above initialization? because we haven't provided the custom IRQ number during initialization.

Thanks,

MUTHUKUMAR V

RE: Configuring Interrupt falling edge not triggering the handler

Naeem Maroof — Tue, 22 Nov 2022 13:19:58 GMT

Hi Muthukumar,

Thank you for contacting DevZone at NordicSemi.

Would you please send me the zip file of your minimal project (including overlays, configurations and main) so that I may flash on the DK and see the issue.

Thanks.

Naeem