1 /*
2 * Copyright (c) 2024, Muhammad Waleed Badar
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/device.h>
9 #include <zephyr/drivers/rtc.h>
10 #include <zephyr/sys/util.h>
11
12 const struct device *const rtc = DEVICE_DT_GET(DT_ALIAS(rtc));
13
set_date_time(const struct device * rtc)14 static int set_date_time(const struct device *rtc)
15 {
16 int ret = 0;
17 struct rtc_time tm = {
18 .tm_year = 2024 - 1900,
19 .tm_mon = 11 - 1,
20 .tm_mday = 17,
21 .tm_hour = 4,
22 .tm_min = 19,
23 .tm_sec = 0,
24 };
25
26 ret = rtc_set_time(rtc, &tm);
27 if (ret < 0) {
28 printk("Cannot write date time: %d\n", ret);
29 return ret;
30 }
31 return ret;
32 }
33
get_date_time(const struct device * rtc)34 static int get_date_time(const struct device *rtc)
35 {
36 int ret = 0;
37 struct rtc_time tm;
38
39 ret = rtc_get_time(rtc, &tm);
40 if (ret < 0) {
41 printk("Cannot read date time: %d\n", ret);
42 return ret;
43 }
44
45 printk("RTC date and time: %04d-%02d-%02d %02d:%02d:%02d\n", tm.tm_year + 1900,
46 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
47
48 return ret;
49 }
50
main(void)51 int main(void)
52 {
53 /* Check if the RTC is ready */
54 if (!device_is_ready(rtc)) {
55 printk("Device is not ready\n");
56 return 0;
57 }
58
59 set_date_time(rtc);
60
61 /* Continuously read the current date and time from the RTC */
62 while (get_date_time(rtc) == 0) {
63 k_sleep(K_MSEC(1000));
64 };
65 return 0;
66 }
67
