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发表于 2015-4-13 15:58:37
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“如果整体超过24小时，就取余数，然后day+1即可”
这个要遇到月底，或者闰年就没法搞了，建议还是把时间转化成ntp时间
下面是我整理的一些代码：
在里面先用“getTimeStamp(Hour,Minute,Second,Day,Month,Year)”得到当前TimeStamp时间，加/减去时区的秒数，再将新的TimeStamp带入getDateStamp()函数，就可以得到正确的日期/时间了。
- #include "Arduino.h"
- #define TIME_ZONE +8
- int Year,Month,Day,Hour,Minute,Second,Weekday;
- /*==============================================================================*/
- /* Useful Constants */
- #define SECS_PER_MIN (60UL)
- #define SECS_PER_HOUR (3600UL)
- #define SECS_PER_DAY (SECS_PER_HOUR * 24UL)
- #define DAYS_PER_WEEK (7UL)
- #define SECS_PER_WEEK (SECS_PER_DAY * DAYS_PER_WEEK)
- #define SECS_PER_YEAR (SECS_PER_WEEK * 52UL)
- #define LEAP_YEAR(Y) ( ((1970+Y)>0) && !((1970+Y)%4) && ( ((1970+Y)%100) || !((1970+Y)%400) ) )
- static const uint8_t monthDays[]=
- {
- 31,28,31,30,31,30,31,31,30,31,30,31
- }; // API starts months from 1, this array starts from 0
- //RTC to timeStamp
- uint32_t getTimeStamp(int c_Hour,int c_Minute,int c_Second,int c_Day, int c_Month, int c_Year)
- {
- c_Year -= 1970;
- // assemble time elements into time_t
- // note year argument is offset from 1970 (see macros in time.h to convert to other formats)
- // previous version used full four digit year (or digits since 2000),i.e. 2009 was 2009 or 9
- int i;
- uint32_t seconds;
- // seconds from 1970 till 1 jan 00:00:00 of the given year
- seconds= c_Year*(SECS_PER_DAY * 365);
- for (i = 0; i < c_Year; i++) {
- if (LEAP_YEAR(i)) {
- seconds += SECS_PER_DAY; // add extra days for leap years
- }
- }
- // add days for this year, months start from 1
- for (i = 1; i < c_Month; i++) {
- if ( (i == 2) && LEAP_YEAR(c_Year)) {
- seconds += SECS_PER_DAY * 29;
- }
- else {
- seconds += SECS_PER_DAY * monthDays[i-1]; //monthDay array starts from 0
- }
- }
- seconds+= (c_Day-1) * SECS_PER_DAY;
- seconds+= c_Hour * SECS_PER_HOUR;
- seconds+= c_Minute * SECS_PER_MIN;
- seconds+= c_Second;
- seconds-= TIME_ZONE * SECS_PER_HOUR;
- // Serial.print("Current date and time:");
- // Serial.println(seconds);
- return seconds;
- }
- //timeStamp to RTC
- void getDateStamp(uint32_t _getDateStamp)
- {
- _getDateStamp += TIME_ZONE * SECS_PER_HOUR;
- unsigned long _weekday = (((_getDateStamp/3600/24)+4)%7);
- Weekday=_weekday;
- Year = 1970;
- while(1) {
- uint32_t Seconds;
- if(LEAP_YEAR(Year-1970)) Seconds = SECS_PER_DAY * 366;
- else Seconds = SECS_PER_DAY * 365;
- if(_getDateStamp >= Seconds) {
- _getDateStamp -= Seconds;
- Year++;
- }
- else break;
- }
- Month = 0;
- while(1) {
- uint32_t Seconds = SECS_PER_DAY * monthDays[Month];
- if(LEAP_YEAR(Year-1970) && Month == 1) Seconds = SECS_PER_DAY * 29;
- if(_getDateStamp >= Seconds) {
- _getDateStamp -= Seconds;
- Month++;
- }
- else break;
- }
- Month++;
- Day = 1;
- while(1) {
- if(_getDateStamp >= SECS_PER_DAY) {
- _getDateStamp -= SECS_PER_DAY;
- Day++;
- }
- else break;
- }
- Hour = _getDateStamp / 3600;
- Minute = (_getDateStamp - (uint32_t)Hour * 3600) / 60;
- Second = (_getDateStamp - (uint32_t)Hour * 3600) - Minute * 60;
- /*
- Serial.print("week: ");
- Serial.println(Weekday);
-
- Serial.print(Day);
- Serial.print("/");
-
- Serial.print(Month);
- Serial.print("/");
-
- Serial.println(Year);
-
- Serial.print(Hour);
- Serial.print(":");
-
- Serial.print(Minute);
- Serial.print(":");
-
- Serial.println(Second);
-
- Serial.println();
- */
- }
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