This is for Zephyr EDGE_BOTH interrupt test

esp32_gpio_bothEdge_test.c

/*
  This test use pins 16,17 Bank_0 on Espressif DevkitC V4
  Just Connect both pins, no other external circuitry should be required
*/

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

#define SLEEP_TIME_MS	2000

static struct gpio_callback button_cb_data;
volatile u32_t cnt=0;
volatile u32_t o_val=0;
volatile u32_t i_val=0;

#define INPUT_GPIO_PIN   17
#define OUTPUT_GPIO_PIN  16

void button_pressed(struct device *dev, struct gpio_callback *cb,
		    u32_t pins)
{
	cnt++;
}


void main(void)
{
	struct device *dev;
	int ret;

	dev = device_get_binding("GPIO_0");
	if (dev == NULL) {
		printk("Error: didn't find %s device\n",
			"GPIO_0");
		return;
	}

	ret = gpio_pin_configure(dev, INPUT_GPIO_PIN, GPIO_INPUT);
	if (ret != 0) {
		printk("Error %d: failed to configure pin %d '%s'\n",
			ret, INPUT_GPIO_PIN, "INPUT");
		return;
	}

	ret = gpio_pin_interrupt_configure(dev, INPUT_GPIO_PIN, GPIO_INT_EDGE_BOTH);
	if (ret != 0) {
		printk("Error %d: failed to configure interrupt on pin %d '%s'\n",
			ret, INPUT_GPIO_PIN, "INPUT");
		return;
	}

	gpio_init_callback(&button_cb_data, button_pressed, BIT(INPUT_GPIO_PIN));
	gpio_add_callback(dev, &button_cb_data);


	ret = gpio_pin_configure(dev, OUTPUT_GPIO_PIN, GPIO_OUTPUT_LOW);
	if (ret != 0) {
		printk("Error %d: failed to configure pin %d '%s'\n",
			ret, OUTPUT_GPIO_PIN, "OUTPUT");
		return;
	}

	while (1) {
		i_val = gpio_pin_get(dev, INPUT_GPIO_PIN);
		gpio_pin_set(dev, OUTPUT_GPIO_PIN, o_val);
		o_val = !o_val;
		i_val = gpio_pin_get(dev, INPUT_GPIO_PIN);
		gpio_pin_set(dev, OUTPUT_GPIO_PIN, o_val);
		o_val = !o_val;
		i_val = gpio_pin_get(dev, INPUT_GPIO_PIN);
		gpio_pin_set(dev, OUTPUT_GPIO_PIN, o_val);
		printk("Results: %d\n\n",cnt); /* should be "1: Rising/Falling, 2: BOTH_EDGE" */
		cnt=0;
		k_sleep(SLEEP_TIME_MS); /* delay for readable serial output */
	}
}