/* * LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* LCD VSS pin to ground
* LCD VCC pin to 5V */
#include <LiquidCrystal.h> //LCD1602顯示頭文件
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
unsigned long seconds;
int s = 0, m = 0, h = 0, d = 0, mon = 0, y = 0; //時間進位
int second = 0, minute = 0, hour = 0, day = 0, month = 0, year = 0; //當前時間
int SECOND = 0, MINUTE = 0, HOUR = 0, DAY = 0, MONTH = 0, YEAR = 0; //初始時間
void setup()
{
lcd.begin(16, 2);
lcd.setCursor(2, 1); lcd.print(":");
lcd.setCursor(5, 1); lcd.print(":");
lcd.setCursor(4, 0); lcd.print('-');
lcd.setCursor(7, 0); lcd.print('-');
for(int i = 2;i <= 13; i++)
{
pinMode(i,OUTPUT);
}
set(2015,5,15,22,19,32); //設置初始時間
}
void FormatDisplay(int col, int row,int num) //格式化輸出
{
lcd.setCursor(col, row);
if(num < 10) lcd.print("0");
lcd.print(num);
}
void time() //計算時間
{
second = ( SECOND + seconds ) % 60; //計算秒
m = ( SECOND + seconds ) / 60; //分鐘進位
FormatDisplay(6,1,second);
minute = ( MINUTE + m ) % 60; //計算分鐘
h = ( MINUTE + m ) / 60; //小時進位
FormatDisplay(3,1,minute);
hour = ( HOUR + h ) % 24; //計算小時
d = ( HOUR + h ) / 24; //天數(shù)進位
FormatDisplay(0,1,hour);
}
int Days(int year, int month) //根據(jù)年月計算當月天數(shù)
{
int days = 0;
if (month != 2)
{
switch (month)
{
case 1: case 3: case 5: case 7: case 8: case 10: case 12: days = 31; break;
case 4: case 6: case 9: case 11: days = 30; break;
}
}
else //閏年
{
if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) days = 29;
else days = 28;
}
return days;
}
void Day() //計算當月天數(shù)
{
int days = Days(year,month);
int days_up;
if( month == 1 ) days_up = Days( year - 1, 12 );
else days_up = Days( year, month - 1 );
day = ( DAY + d ) % days;
if( day == 0 ) day = days;
if( ( DAY + d ) == days + 1 )
{
DAY -= days;
mon++;
}
if(( DAY + d ) == 0)
{
DAY += days_up;
mon--;
}
FormatDisplay(8,0,day);
}
void Month() //計算月份
{
month = ( MONTH + mon ) % 12;
if( month == 0 ) month = 12;
y = ( MONTH + mon - 1) / 12;
FormatDisplay(5,0,month);
}
void Year() //計算年份
{
year = ( YEAR + y ) % 9999;
if( year == 0 ) year = 9999;
lcd.setCursor(0, 0);
if(year < 1000) { lcd.print("0"); }
if(year < 100) { lcd.print("0"); }
if(year < 10) { lcd.print("0"); }
lcd.print(year);
}
void Week(int y,int m, int d) //根據(jù)年月日計算星期幾
{
if(m==1) m=13;
if(m==2) m=14;
int week=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
String weekstr="";
switch(week)
{
case 1: weekstr="Mon. "; break;
case 2: weekstr="Tues. "; break;
case 3: weekstr="Wed. "; break;
case 4: weekstr="Thur. "; break;
case 5: weekstr="Fri. "; break;
case 6: weekstr="Sat. "; break;
case 7: weekstr="Sun. "; break;
}
lcd.setCursor(11, 0);
lcd.print(weekstr);
}
void set(int y, int mon, int d, int h, int m, int s)
{
YEAR = y;
MONTH = mon;
DAY = d;
HOUR = h;
MINUTE = m;
SECOND = s;
}
void Display() //顯示時間、日期、星期
{
time();
Day();
Month();
Year();
Week(year,month,day);
}
void loop()
{
seconds = millis()/1000;
Display();
}
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