1 /*
2 * Copyright (c) 2006-2018, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2018-01-30 armink the first version
9 */
10
11 #include <time.h>
12 #include <string.h>
13 #include <rtthread.h>
14
15 #include <drivers/rtc.h>
16
17 #ifdef RT_USING_SOFT_RTC
18
19 /* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50) */
20 #define RTC_TIME_INIT(year, month, day, hour, minute, second) \
21 {.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second}
22
23 #ifndef SOFT_RTC_TIME_DEFAULT
24 #define SOFT_RTC_TIME_DEFAULT RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0)
25 #endif
26
27 static struct rt_device soft_rtc_dev;
28 static rt_tick_t init_tick;
29 static time_t init_time;
30
soft_rtc_control(rt_device_t dev,int cmd,void * args)31 static rt_err_t soft_rtc_control(rt_device_t dev, int cmd, void *args)
32 {
33 time_t *time;
34 struct tm time_temp;
35
36 RT_ASSERT(dev != RT_NULL);
37 memset(&time_temp, 0, sizeof(struct tm));
38
39 switch (cmd)
40 {
41 case RT_DEVICE_CTRL_RTC_GET_TIME:
42 time = (time_t *) args;
43 *time = init_time + (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
44 break;
45
46 case RT_DEVICE_CTRL_RTC_SET_TIME:
47 {
48 time = (time_t *) args;
49 init_time = *time - (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
50 break;
51 }
52 }
53
54 return RT_EOK;
55 }
56
57 #ifdef RT_USING_DEVICE_OPS
58 const static struct rt_device_ops soft_rtc_ops =
59 {
60 RT_NULL,
61 RT_NULL,
62 RT_NULL,
63 RT_NULL,
64 RT_NULL,
65 soft_rtc_control
66 };
67 #endif
68
rt_soft_rtc_init(void)69 int rt_soft_rtc_init(void)
70 {
71 static rt_bool_t init_ok = RT_FALSE;
72 struct tm time_new = SOFT_RTC_TIME_DEFAULT;
73
74 if (init_ok)
75 {
76 return 0;
77 }
78 /* make sure only one 'rtc' device */
79 RT_ASSERT(!rt_device_find("rtc"));
80
81 init_tick = rt_tick_get();
82 init_time = mktime(&time_new);
83
84 soft_rtc_dev.type = RT_Device_Class_RTC;
85
86 /* register rtc device */
87 #ifdef RT_USING_DEVICE_OPS
88 soft_rtc_dev.ops = &soft_rtc_ops;
89 #else
90 soft_rtc_dev.init = RT_NULL;
91 soft_rtc_dev.open = RT_NULL;
92 soft_rtc_dev.close = RT_NULL;
93 soft_rtc_dev.read = RT_NULL;
94 soft_rtc_dev.write = RT_NULL;
95 soft_rtc_dev.control = soft_rtc_control;
96 #endif
97
98 /* no private */
99 soft_rtc_dev.user_data = RT_NULL;
100
101 rt_device_register(&soft_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR);
102
103 init_ok = RT_TRUE;
104
105 return 0;
106 }
107 INIT_DEVICE_EXPORT(rt_soft_rtc_init);
108
109 #endif /* RT_USING_SOFT_RTC */
110