1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _STM32F4XX_RTC_H_
18 #define _STM32F4XX_RTC_H_
19 
20 #ifdef __cplusplus
21 extern "C" {
22 #endif
23 
24 #include <stdint.h>
25 #include <seos.h>
26 
27 enum RtcClock
28 {
29     RTC_CLK_LSI,
30     RTC_CLK_LSE,
31     RTC_CLK_LSE_BYPASS,
32 };
33 
34 #define RTC_ERR_TOO_BIG         -1
35 #define RTC_ERR_TOO_SMALL       -2
36 #define RTC_ERR_INTERNAL        -3
37 #define RTC_ERR_ACCURACY_UNMET  -4
38 
39 void rtcInit(void);
40 int rtcSetWakeupTimer(uint64_t delay);
41 uint64_t rtcGetTime(void);
42 
43 #define RTC_NUM_BACKUP_REGS     20
44 uint32_t* rtcGetBackupStorage(void);
45 
46 
47 #ifdef __cplusplus
48 }
49 #endif
50 
51 #endif
52