LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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rtc.c
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1 /*------------------------------------------------------------------------/
2 /RTC control module
3 /-------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2011, ChaN, all right reserved.
6 /
7 / * This software is a free software and there is NO WARRANTY.
8 / * No restriction on use. You can use, modify and redistribute it for
9 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
10 / * Redistributions of source code must retain the above copyright notice.
11 /
12 /-------------------------------------------------------------------------*/
13 
14 #include "chip.h"
15 #include "board.h"
16 #include "rtc.h"
17 
18 
19 int rtc_initialize (void)
20 {
21  static int init;
22  IP_RTC_TIME_T rtcTime;
23 
24  if (init) /* Already initialized */
25  return 1;
26 
27  /* RTC Block section ------------------------------------------------------ */
28  Chip_RTC_Init(LPC_RTC);
29 
30  /* Set current time for RTC */
31  /* Current time is 8:00:00PM, 2013-01-31 */
32  rtcTime.time[RTC_TIMETYPE_SECOND] = 0;
33  rtcTime.time[RTC_TIMETYPE_MINUTE] = 0;
34  rtcTime.time[RTC_TIMETYPE_HOUR] = 20;
35  rtcTime.time[RTC_TIMETYPE_DAYOFMONTH] = 31;
36  rtcTime.time[RTC_TIMETYPE_MONTH] = 1;
37  rtcTime.time[RTC_TIMETYPE_YEAR] = 2013;
38  Chip_RTC_SetFullAlarmTime(LPC_RTC, &rtcTime);
39 
40  /* Enable rtc (starts increase the tick counter and second counter register) */
41  Chip_RTC_Enable(LPC_RTC, ENABLE);
42  init = 1;
43 
44  return 1;
45 }
46 
47 int rtc_gettime (RTC *rtc)
48 {
49  IP_RTC_TIME_T rtcTime;
50 
51  Chip_RTC_GetFullTime(LPC_RTC, &rtcTime);
52 
53  rtc->sec = rtcTime.time[RTC_TIMETYPE_SECOND];
54  rtc->min = rtcTime.time[RTC_TIMETYPE_MINUTE];
55  rtc->hour = rtcTime.time[RTC_TIMETYPE_HOUR];
56  rtc->wday = rtcTime.time[RTC_TIMETYPE_DAYOFWEEK];
57  rtc->mday = rtcTime.time[RTC_TIMETYPE_DAYOFMONTH];
58  rtc->month = rtcTime.time[RTC_TIMETYPE_MONTH];
59  rtc->year = rtcTime.time[RTC_TIMETYPE_YEAR];
60  return 1;
61 }
62 
63 int rtc_settime (const RTC *rtc)
64 {
65  IP_RTC_TIME_T rtcTime;
66 
67  rtcTime.time[RTC_TIMETYPE_SECOND] = rtc->sec;
68  rtcTime.time[RTC_TIMETYPE_MINUTE] = rtc->min;
69  rtcTime.time[RTC_TIMETYPE_HOUR] = rtc->hour;
70  rtcTime.time[RTC_TIMETYPE_DAYOFMONTH] = rtc->wday;
71  rtcTime.time[RTC_TIMETYPE_DAYOFMONTH] = rtc->mday;
72  rtcTime.time[RTC_TIMETYPE_MONTH] = rtc->month;
73  rtcTime.time[RTC_TIMETYPE_YEAR] = rtc->year;
74 
75  Chip_RTC_GetFullTime(LPC_RTC, &rtcTime);
76 
77  return 1;
78 }
79 
87 DWORD get_fattime()
88 {
89  RTC rtc;
90 
91  /* Get local time */
92  rtc_gettime(&rtc);
93 
94  /* Pack date and time into a DWORD variable */
95  return ((DWORD) (rtc.year - 1980) << 25)
96  | ((DWORD) rtc.month << 21)
97  | ((DWORD) rtc.mday << 16)
98  | ((DWORD) rtc.hour << 11)
99  | ((DWORD) rtc.min << 5)
100  | ((DWORD) rtc.sec >> 1);
101 }