-
Notifications
You must be signed in to change notification settings - Fork 3
/
rtc_support.c
169 lines (126 loc) · 5 KB
/
rtc_support.c
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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/********************************************************************************/
/*!
@file rtc_support.c
@author Nemui Trinomius (http://nemuisan.blog.bai.ne.jp)
@version 1.00
@date 2011.06.12
@brief Based on ST Microelectronics's Sample Thanks!
@section HISTORY
2011.06.12 V1.00 Start Here.
@section LICENSE
BSD License. See Copyright.txt
*/
/********************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "rtc_support.h"
/* Defines -------------------------------------------------------------------*/
/* Variables -----------------------------------------------------------------*/
RTC_InitTypeDef RTC_InitStructure;
RTC_TimeTypeDef RTC_TimeStructure;
RTC_DateTypeDef RTC_DateStructure;
__IO uint32_t AsynchPrediv = 0, SynchPrediv = 0;
__IO uint32_t TimeDisplay = 0;
/* Constants -----------------------------------------------------------------*/
/* Function prototypes -------------------------------------------------------*/
/* Functions -----------------------------------------------------------------*/
/**************************************************************************/
/*!
RealTimeClockmodule Initialize
*/
/**************************************************************************/
void RTC_Configuration(void)
{
/* Enable the PWR APB1 Clock Interface */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
if (RTC_ReadBackupRegister(RTC_BKP_DR2) != 0xA5A5) {
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
#if defined (RTC_CLOCK_SOURCE_LSI) /* LSI used as RTC source clock*/
/* The RTC Clock may varies due to LSI frequency dispersion. */
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
SynchPrediv = 0xFF;
AsynchPrediv = 0x7F;
#elif defined (RTC_CLOCK_SOURCE_LSE) /* LSE used as RTC source clock */
/* Enable the LSE OSC */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
SynchPrediv = 0xFF;
AsynchPrediv = 0x7F;
#else
#error Please select the RTC Clock source inside the main.c file
#endif /* RTC_CLOCK_SOURCE_LSI */
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Write to the first RTC Backup Data Register */
RTC_WriteBackupRegister(RTC_BKP_DR2,0xA5A5);
/* Set the Time */
RTC_TimeStructure.RTC_Hours = 22;
RTC_TimeStructure.RTC_Minutes = 11;
RTC_TimeStructure.RTC_Seconds = 00;
/* Set the Date */
RTC_DateStructure.RTC_Month = 4;
RTC_DateStructure.RTC_Date = 29;
RTC_DateStructure.RTC_Year = 11;
RTC_DateStructure.RTC_WeekDay = RTC_Weekday_Friday;
/* Calendar Configuration */
RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_Init(&RTC_InitStructure);
/* Set Current Time and Date */
RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure);
RTC_SetDate(RTC_Format_BIN, &RTC_DateStructure);
#if 0
/* Configure the RTC Wakeup Clock source and Counter (Wakeup event each 1 second) */
RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
RTC_SetWakeUpCounter(0x7FF);
/* Enable the Wakeup Interrupt */
RTC_ITConfig(RTC_IT_WUT, ENABLE);
/* Enable Wakeup Counter */
RTC_WakeUpCmd(ENABLE);
#endif
/* Backup SRAM ***************************************************************/
/* Enable BKPRAM Clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_BKPSRAM, ENABLE);
/* Enable the Backup SRAM low power Regulator to retain it's content in VBAT mode */
PWR_BackupRegulatorCmd(ENABLE);
/* Wait until the Backup SRAM low power Regulator is ready */
while(PWR_GetFlagStatus(PWR_FLAG_BRR) == RESET)
{
}
}
else{
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the Wakeup Interrupt */
RTC_ClearITPendingBit(RTC_IT_WUT);
/* Backup SRAM ***************************************************************/
/* Enable BKPSRAM Clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_BKPSRAM, ENABLE);
}
}
/* End Of File ---------------------------------------------------------------*/