samples/bluetooth/st_ble_sensor/src/button_svc.c

/** @file
 *  @brief Button Service sample
 */

/*
 * Copyright (c) 2019 Marcio Montenegro <mtuxpe@gmail.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "button_svc.h"

#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>

#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/hci.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/uuid.h>
#include <zephyr/bluetooth/gatt.h>

LOG_MODULE_REGISTER(button_svc);

static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET(DT_ALIAS(sw0), gpios);
static struct gpio_callback gpio_cb;

int button_init(gpio_callback_handler_t handler)
{
	int ret;

	if (!device_is_ready(button.port)) {
		LOG_ERR("Error: button GPIO device %s is not ready",
			button.port->name);
		return -ENODEV;
	}

	ret = gpio_pin_configure_dt(&button, GPIO_INPUT);
	if (ret != 0) {
		LOG_ERR("Error %d: can't configure button on GPIO %s pin %d",
			ret, button.port->name, button.pin);
		return ret;

	}

	gpio_init_callback(&gpio_cb, handler, BIT(button.pin));
	gpio_add_callback(button.port, &gpio_cb);
	ret = gpio_pin_interrupt_configure_dt(&button, GPIO_INT_EDGE_TO_ACTIVE);
	if (ret != 0) {
		LOG_ERR("Error %d: can't configure button interrupt on "
			"GPIO %s pin %d", ret, button.port->name, button.pin);
		return ret;
	}
	return 0;
}