1 /*
2 * Copyright (c) 2020 Nordic Semiconductor ASA
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/device.h>
9 #include <zephyr/drivers/gpio.h>
10 #include <zephyr/drivers/gpio/gpio_sx1509b.h>
11
12 #define NUMBER_OF_LEDS 3
13 #define GREEN_LED DT_GPIO_PIN(DT_NODELABEL(led0), gpios)
14 #define BLUE_LED DT_GPIO_PIN(DT_NODELABEL(led1), gpios)
15 #define RED_LED DT_GPIO_PIN(DT_NODELABEL(led2), gpios)
16
17 enum sx1509b_color { sx1509b_red = 0, sx1509b_green, sx1509b_blue };
18
19 const struct device *sx1509b_dev;
20 static struct k_work_delayable rgb_work;
21 static uint8_t which_color = sx1509b_red;
22 static uint8_t iterator;
23
24 static const gpio_pin_t rgb_pins[] = {
25 RED_LED,
26 GREEN_LED,
27 BLUE_LED,
28 };
29
rgb_work_handler(struct k_work * work)30 static void rgb_work_handler(struct k_work *work)
31 {
32 if (which_color == sx1509b_red) {
33 sx1509b_led_intensity_pin_set(sx1509b_dev, RED_LED, iterator);
34
35 iterator++;
36
37 if (iterator >= 255) {
38 sx1509b_led_intensity_pin_set(sx1509b_dev, RED_LED, 0);
39 which_color = sx1509b_green;
40 iterator = 0;
41 }
42 } else if (which_color == sx1509b_green) {
43 sx1509b_led_intensity_pin_set(sx1509b_dev, GREEN_LED, iterator);
44
45 iterator++;
46
47 if (iterator >= 255) {
48 sx1509b_led_intensity_pin_set(sx1509b_dev, GREEN_LED,
49 0);
50 which_color = sx1509b_blue;
51 iterator = 0;
52 }
53 } else if (which_color == sx1509b_blue) {
54 sx1509b_led_intensity_pin_set(sx1509b_dev, BLUE_LED, iterator);
55
56 iterator++;
57
58 if (iterator >= 255) {
59 sx1509b_led_intensity_pin_set(sx1509b_dev, BLUE_LED, 0);
60 which_color = sx1509b_red;
61 iterator = 0;
62 }
63 }
64
65 k_work_schedule(k_work_delayable_from_work(work), K_MSEC(10));
66 }
67
main(void)68 int main(void)
69 {
70 int err;
71
72 printk("SX1509B intensity sample\n");
73
74 sx1509b_dev = DEVICE_DT_GET(DT_NODELABEL(sx1509b));
75
76 if (!device_is_ready(sx1509b_dev)) {
77 printk("sx1509b: device not ready.\n");
78 return 0;
79 }
80
81 for (int i = 0; i < NUMBER_OF_LEDS; i++) {
82 err = sx1509b_led_intensity_pin_configure(sx1509b_dev,
83 rgb_pins[i]);
84
85 if (err) {
86 printk("Error configuring pin for LED intensity\n");
87 }
88 }
89
90 k_work_init_delayable(&rgb_work, rgb_work_handler);
91 k_work_schedule(&rgb_work, K_NO_WAIT);
92 return 0;
93 }
94
