1 /** @file
2 * @brief Button Service sample
3 */
4
5 /*
6 * Copyright (c) 2019 Marcio Montenegro <mtuxpe@gmail.com>
7 *
8 * SPDX-License-Identifier: Apache-2.0
9 */
10
11 #include "led_svc.h"
12
13 #include <zephyr/kernel.h>
14 #include <zephyr/drivers/gpio.h>
15 #include <zephyr/logging/log.h>
16
17 LOG_MODULE_REGISTER(led_svc);
18
19 static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(DT_ALIAS(led0), gpios);
20 static bool led_state; /* Tracking state here supports GPIO expander-based LEDs. */
21 static bool led_ok;
22
led_update(void)23 void led_update(void)
24 {
25 if (!led_ok) {
26 return;
27 }
28
29 led_state = !led_state;
30 LOG_INF("Turn %s LED", led_state ? "on" : "off");
31 gpio_pin_set(led.port, led.pin, led_state);
32 }
33
led_init(void)34 int led_init(void)
35 {
36 int ret;
37
38 led_ok = gpio_is_ready_dt(&led);
39 if (!led_ok) {
40 LOG_ERR("Error: LED on GPIO %s pin %d is not ready",
41 led.port->name, led.pin);
42 return -ENODEV;
43 }
44
45 ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_INACTIVE);
46 if (ret < 0) {
47 LOG_ERR("Error %d: failed to configure GPIO %s pin %d",
48 ret, led.port->name, led.pin);
49 }
50
51 return ret;
52 }
53
