common.h

128*64液晶显示月历模式万年历

#include <absacc.h>
#include <intrins.h>
#include <reg51.h>

#define uchar unsigned char
#define uint unsigned int

//判断是否闰年
uchar isLeapyear(uint year)
{
  //闰年判断：year被4整除但不被100整除
  //          或year被4整除且被400整除
  if ((year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)))
  {
    return 1;
  }
  else
  {
    return 0;
  }
}

///根据给定风格日期计算星期
uchar GetWeek(uint year, uchar month, uchar day)
{
  uchar leapFlag = 0;
  uchar week = 0;
  uchar i = 0;
  uchar a[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};  //每月天数数组
  uint count = 0;

  leapFlag = isLeapyear( year );
  if (leapFlag == 1)
  {
    a[2]++;
  }

  for (i = 1; i < month; i++)
  {
    count = count + a[i];
  }                                                                  //计算从给定年份的1月1日到给定日之前的天数
  count = count + day;

  //计算星期
  week = (year - 1 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + count) % 7;
  return week;
}

void delay(uint time)
{
  uint i = 0;
  uint j = 0;
  for (i = 0; i < 100; i ++)
  {
    for (j = 0; j < time; j++)
	{	
	}
  }
}