1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* MIT License
*
* Copyright (c) 2020 Joey Castillo
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
////< @file watch_rtc.h
#include "hpl_calendar.h"
/** @addtogroup rtc Real-Time Clock
* @brief This section covers functions related to the SAM L22's real-time clock peripheral, including
* date, time and alarm functions.
* @details The real-time clock is the only peripheral that main.c enables for you. It is the cornerstone
* of low power operation on the watch, and it is required for several key functions that we
* assume will be available, namely the wake from BACKUP mode and the callback on the ALARM button.
* It is also required for the operation of the 1 Hz tick interrupt, which you will most likely use
* to wake from STANDBY mode.
*/
/// @{
#define WATCH_RTC_REFERENCE_YEAR (2020)
typedef struct watch_date_time {
uint16_t year;
uint8_t month;
uint8_t day;
uint8_t hour;
uint8_t minute;
uint8_t second;
} watch_date_time;
typedef enum watch_rtc_alarm_match {
ALARM_MATCH_DISABLED = 0,
ALARM_MATCH_SS,
ALARM_MATCH_MMSS,
ALARM_MATCH_HHMMSS,
} watch_rtc_alarm_match;
/** @brief Called by main.c to check if the RTC is enabled.
* You may call this function, but outside of app_init, it should always return true.
*/
bool _watch_rtc_is_enabled();
/** @brief Sets the date and time.
* @param date_time The time you wish to set.
* @note Internally, the SAM L22 stores the year as six bits representing a value from 0 to 63. It treats this
* as a year offset from a reference year, which must be a leap year. For now, this library uses 2020 as
* the reference year, so the range of valid values is 2020 to 2083.
*/
void watch_rtc_set_date_time(watch_date_time date_time);
/** @brief Returns the system date and time in the provided struct.
* @return A watch_date_time with the current date and time.
*/
watch_date_time watch_rtc_get_date_time();
/** @brief Registers an alarm callback that will be called when the RTC time matches the target time, as masked
* by the provided mask.
* @param callback The function you wish to have called when the alarm fires. If this value is NULL, the alarm
* interrupt will still be enabled, but no callback function will be called.
* @param alarm_time The time that you wish to match. The date is currently ignored.
* @param mask One of the values in watch_rtc_alarm_match indicating which values to check.
* @details The alarm interrupt is a versatile tool for scheduling events in the future, especially since it can
* wake the device from both shallow and deep sleep modes. The key to its versatility is the mask
* parameter. Suppose we set an alarm for midnight, 00:00:00.
* * if mask is ALARM_MATCH_SS, the alarm will fire every minute when the clock ticks to seconds == 0.
* * with ALARM_MATCH_MMSS, the alarm will once an hour, at the top of each hour.
* * with ALARM_MATCH_HHMMSS, the alarm will fire at midnight every day.
* In theory the SAM L22's alarm function can match on days, months and even years, but I have not had
* success with this yet; as such, I am omitting these options for now.
*/
void watch_rtc_register_alarm_callback(ext_irq_cb_t callback, watch_date_time alarm_time, watch_rtc_alarm_match mask);
/** @brief Disables the alarm callback.
*/
void watch_rtc_disable_alarm_callback();
/** @brief Registers a "tick" callback that will be called once per second.
* @param callback The function you wish to have called when the clock ticks. If you pass in NULL, the tick
* interrupt will still be enabled, but no callback function will be called.
*/
void watch_register_tick_callback(ext_irq_cb_t callback);
/** @brief Disables the tick callback.
*/
void watch_disable_tick_callback();
/** @brief Sets the system date and time.
* @param date_time A struct representing the date and time you wish to set.
*/
__attribute__((deprecated("Use watch_rtc_set_date_time function instead")))
void watch_set_date_time(struct calendar_date_time date_time);
/** @brief Returns the system date and time in the provided struct.
* @param date_time A pointer to a calendar_date_time struct. It will have with the correct date and time on return.
*/
__attribute__((deprecated("Use the watch_rtc_get_date_time function instead")))
void watch_get_date_time(struct calendar_date_time *date_time);
/// @}
|