Handling GPIO interrupts using Zephyr gpio.h while using DK_Buttons_and_LEDs driver make unwanted behavior for the rising edge trigger just when "GPIO_INT_EDGE_BOTH" flag is used.

Question

Hello,

While I was handling GPIO interrupts using Zephyr GPIO Driver in an sample that already uses the DK Buttons and LEDs driver, I get that the interrupt callback is called twice at the rising edge when the interrupt was configured using "GPIO_INT_EDGE_BOTH", this flag only is what cause the issue.

When I disabled the DK Buttons and LEDs driver the issue disappeared!

Here are my code:

/*
 * Copyright (c) 2016 Open-RnD Sp. z o.o.
 * Copyright (c) 2020 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/util.h>
#include <zephyr/sys/printk.h>
#include <inttypes.h>

#include <dk_buttons_and_leds.h>

#define SLEEP_TIME_MS	1

/*
 * Get button configuration from the devicetree sw0 alias. This is mandatory.
 */
#define SW0_NODE	DT_ALIAS(sw1)
#if !DT_NODE_HAS_STATUS(SW0_NODE, okay)
#error "Unsupported board: sw0 devicetree alias is not defined"
#endif
static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET_OR(SW0_NODE, gpios,
							      {0});
static struct gpio_callback button_cb_data;

/*
 * The led0 devicetree alias is optional. If present, we'll use it
 * to turn on the LED whenever the button is pressed.
 */
static struct gpio_dt_spec led = GPIO_DT_SPEC_GET_OR(DT_ALIAS(led0), gpios,
						     {0});

void button_pressed(const struct device *dev, struct gpio_callback *cb,
		    uint32_t pins)
{
	(gpio_pin_get_dt(&button)) ? printk("Button pressed \n") : printk("Button released \n");
}




void ButtonEventHandler(uint32_t buttonState, uint32_t hasChanged)
{
	printk("ButtonEventHandler was called \n");

}





int main(void)
{
	int ret;

	/* Initialize buttons */
	ret = dk_buttons_init(ButtonEventHandler);
	if (ret) {
		printk("Error: ButtonEventHandler \n");
		return 0;
	}


	if (!gpio_is_ready_dt(&button)) {
		printk("Error: button device %s is not ready\n",
		       button.port->name);
		return 0;
	}

	ret = gpio_pin_configure_dt(&button, GPIO_INPUT);
	if (ret != 0) {
		printk("Error %d: failed to configure %s pin %d\n",
		       ret, button.port->name, button.pin);
		return 0;
	}

	ret = gpio_pin_interrupt_configure_dt(&button,
					      GPIO_INT_EDGE_BOTH);
	if (ret != 0) {
		printk("Error %d: failed to configure interrupt on %s pin %d\n",
			ret, button.port->name, button.pin);
		return 0;
	}

	gpio_init_callback(&button_cb_data, button_pressed, BIT(button.pin));
	gpio_add_callback(button.port, &button_cb_data);
	printk("Set up button at %s pin %d\n", button.port->name, button.pin);

	if (led.port && !device_is_ready(led.port)) {
		printk("Error %d: LED device %s is not ready; ignoring it\n",
		       ret, led.port->name);
		led.port = NULL;
	}
	if (led.port) {
		ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT);
		if (ret != 0) {
			printk("Error %d: failed to configure LED device %s pin %d\n",
			       ret, led.port->name, led.pin);
			led.port = NULL;
		} else {
			printk("Set up LED at %s pin %d\n", led.port->name, led.pin);
		}
	}

	printk("Press the button\n");
	if (led.port) {
		while (1) {
			/* If we have an LED, match its state to the button's. */
			int val = gpio_pin_get_dt(&button);

			if (val >= 0) {
				gpio_pin_set_dt(&led, val);
			}
			k_msleep(SLEEP_TIME_MS);
		}
	}
	return 0;
}

Response for just one press:

*** Booting Zephyr OS build v3.3.99-ncs1 ***
Set up button at gpio@842500 pin 24
Set up LED at gpio@842500 pin 28
Press the button
Button pressed 
Button pressed 
ButtonEventHandler was called 
Button released 
ButtonEventHandler was called

Why is this happening?

How can I prevent it?

Best regards,

Basem