1 /*
2 * Copyright (c) 2023 Endor AG
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/device.h>
8 #include <zephyr/drivers/led.h>
9 #include <zephyr/kernel.h>
10
11 #include <zephyr/logging/log.h>
12
13 LOG_MODULE_REGISTER(main, CONFIG_LOG_DEFAULT_LEVEL);
14
15 #define MAX_BRIGHTNESS 100
16 #define LAST_LED 15
17
18 #define SLEEP_DELAY_MS 100
19 #define FADE_DELAY_MS 10
20 #define WRITE_CHANNELS_LEDS_COUNT 3
21 #define WRITE_CHANNELS_LED_START 2
22
pulse_led(int led,const struct device * const dev)23 static void pulse_led(int led, const struct device *const dev)
24 {
25 int status;
26 uint8_t percent;
27
28 for (percent = 1 ; percent <= MAX_BRIGHTNESS ; percent++) {
29 status = led_set_brightness(dev, led, percent);
30 if (status) {
31 LOG_ERR("Could not change brightness: %i", status);
32 return;
33 }
34 k_msleep(FADE_DELAY_MS);
35 }
36 k_msleep(SLEEP_DELAY_MS);
37 for (percent = MAX_BRIGHTNESS;
38 percent <= MAX_BRIGHTNESS; percent--) {
39 status = led_set_brightness(dev, led, percent);
40 if (status) {
41 LOG_ERR("Could not change brightness: %i", status);
42 return;
43 }
44 k_msleep(FADE_DELAY_MS);
45 }
46 }
47
pulse_leds(const struct device * const dev)48 static void pulse_leds(const struct device *const dev)
49 {
50 int status;
51 uint8_t brightness[WRITE_CHANNELS_LEDS_COUNT];
52 uint8_t percent;
53
54 for (percent = 1; percent <= MAX_BRIGHTNESS; percent++) {
55 memset(brightness, percent, sizeof(brightness));
56 status = led_write_channels(dev, WRITE_CHANNELS_LED_START,
57 WRITE_CHANNELS_LEDS_COUNT,
58 brightness);
59 if (status) {
60 LOG_ERR("Could not change brightness: %i", status);
61 return;
62 }
63 k_msleep(FADE_DELAY_MS);
64 }
65 k_msleep(SLEEP_DELAY_MS);
66 for (percent = MAX_BRIGHTNESS;
67 percent <= MAX_BRIGHTNESS; percent--) {
68 memset(brightness, percent, sizeof(brightness));
69 status = led_write_channels(dev, WRITE_CHANNELS_LED_START,
70 WRITE_CHANNELS_LEDS_COUNT,
71 brightness);
72 if (status) {
73 LOG_ERR("Could not change brightness: %i", status);
74 return;
75 }
76 k_msleep(FADE_DELAY_MS);
77 }
78 }
79
main(void)80 int main(void)
81 {
82 int led;
83 const struct device *const is31fl3216a =
84 DEVICE_DT_GET_ANY(issi_is31fl3216a);
85
86 if (!is31fl3216a) {
87 LOG_ERR("No device with compatible issi,is31fl3216a found");
88 return 0;
89 } else if (!device_is_ready(is31fl3216a)) {
90 LOG_ERR("LED controller %s is not ready", is31fl3216a->name);
91 return 0;
92 }
93
94 LOG_INF("Found LED controller %s", is31fl3216a->name);
95 for (;;) {
96 LOG_INF("Pulsing single LED");
97 for (led = 0 ; led <= LAST_LED ; led++) {
98 pulse_led(led, is31fl3216a);
99 }
100 LOG_INF("Pulsing multiple LEDs");
101 pulse_leds(is31fl3216a);
102 }
103
104 return 0;
105 }
106
