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#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#define SW0_NODE DT_ALIAS(sw0)
#if !DT_NODE_HAS_STATUS(SW0_NODE, okay)
#error "Unsupported board: Devicetree alias for button is not defined"
#endif
static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET(SW0_NODE, gpios);
static struct gpio_callback button_cb_data;
void button_pressed(const struct device *dev, struct gpio_callback *cb,
uint32_t pins)
{
printk("Button pressed\n");
}
int main(void)
{
int ret;
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_TO_ACTIVE);
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);
return 0;
}
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