Interrupt Zephyr

[MPDeveloper89]

Hello,

I want to implement the interrupt functionality and based on my understanding I can implement it using GPIO or ISR function.

In case of GPIO (APIs  here):

int gpio_pin_configure(const struct device *port, gpio_pin_t pin, gpio_flags_t flags)
int gpio_pin_interrupt_configure(const struct device *port, gpio_pin_t pin, gpio_flags_t flags)
static inline void gpio_init_callback(struct gpio_callback *callback, gpio_callback_handler_t handler, gpio_port_pins_t pin_mask)¶
static inline int gpio_add_callback(const struct device *port, struct gpio_callback *callback)¶

 

For ISR function (APIs here)

#define MY_DEV_IRQ  24       /* device uses IRQ 24 */
#define MY_DEV_PRIO  2       /* device uses interrupt priority 2 */
/* argument passed to my_isr(), in this case a pointer to the device */
#define MY_ISR_ARG  DEVICE_GET(my_device)
#define MY_IRQ_FLAGS 0       /* IRQ flags */

void my_isr(void *arg)
{
   ... /* ISR code */
}

void my_isr_installer(void)
{
   ...
   IRQ_CONNECT(MY_DEV_IRQ, MY_DEV_PRIO, my_isr, MY_ISR_ARG, MY_IRQ_FLAGS);
   irq_enable(MY_DEV_IRQ);
   ...
}

Then, based which features can I use GPIO instead ISR functions?

Thank in advance.

[nRF5xFanboy]

HI MPDeveloper89,

You should leave the ISR context as quick as possible by decoupling it.
You can do many things in ISR but some things are not allowed.
The Nordic infocenter is a very good source of information.

Best regards,
     nRF5xFanBoy

[Øivind]

Hi,

For GPIO interrupts, I would recommend using the gpio_* api, and let the driver handle the rest.

If there is any specific functionality that you are struggling to implement using the api, let me know.

[MPDeveloper89]

Hello Oivind,

Thank you for reply.

I already implemented the app where button pushed has to stop and resume the 2nd thread using GPIO APIs.

So, the API choice is the best solution? What do you think?

Thank again.

[Øivind]

For implementing an interrupt on a button, the GPIO API is usually the best solution, yes.

This is also how it is done in zephyr/samples/basic/button.