很久前做过的一个电子万年历，拿来和大家分享一下，做成实物在家里放着跑了2年多了，极其稳定，日误差小于1秒。

唯一的问题：不用DS1302虽然是省去了不少焊接的功夫，但是程序掉电又得重设时间，所以建议接交流电+蓄电池浮充，这样就不会掉电了，完美解决问题，可以跑一个月都不用调时间。

源代码：

#include <reg52.h>		                                   
typedef  unsigned int u16;	 
typedef  unsigned char u8; 
sbit k2=P3^2;                                            //K1 K2 K3 K4按键接口，建议从左到右接K1-K4
sbit k1=P3^5;
sbit k3=P3^3;
sbit k4=P3^4;
sbit DQ=P3^6;
sbit beep=P1^6;    
sbit Data=P2^0;                                             //有源蜂鸣器在P16口
sbit lcden=P1^4;                                                //LCD1602接口定义
sbit lcdrs=P1^0;                                                   
sbit lcdrw=P2^6;
sbit bg=P2^7;                                                //背光变量接入LCD1602的K极，通过bg的高低电平就可控制自动熄灭与点亮
u8 k,e,d,o=1,p=1,temp,nxflag=0,mbflag=0,tianmax;      
float temperature;                                           //温度变量，18B20接收时为浮点数
u8 miao1,miao2,fen1,fen2,shi1,shi2,tian1,tian2,wk,tem1,tem2,tem3,wendufu;
u8 day=1,mon=1,day1,day2,yue1,yue2,mbw,n=0,m=0,beiguang,RH,RL,TH,TL,tempH,tempL;
u8 se1,se2,mon1,mon2,hou1,hou2,min1,min2,MB2,nian1,nian2,nian3,nian4; 
u16 y,MB1;
u16 temper,buchang,tempwarn=0,tempwarn1=500;                //tempwarn为温度下限，1为温度上限
u8 code set[]={"NaoZhong  Status"};                                    //上电后傻瓜调节模块
u8 code tempwarng[]={"Wendu Waring!"};
u8 code temmin[]={"Min"};
u8 code temmax[]={"Max"};                
u8 code naozhongON[]={" ON"};
u8 code naozhongOFF[]={"OFF"};
u8 code setsucces[]={"Set Success!"};
u8 code thanks[]={"Welcome to use !"};
u8 code thanksu[]={"thanks for using"};
u8 code make[]={"Designed by LY"};
u8 code MB[]={"Stopwatch"};
u8 code week1[]={"[MON]"};
u8 code week2[]={"[TUE]"};
u8 code week3[]={"[WED]"};
u8 code week4[]={"[THU]"};
u8 code week5[]={"[FRI]"};
u8 code week6[]={"[SAT]"};
u8 code week7[]={"[SUN]"};                        
void delay(unsigned int z)                                   //定义延时函数
{                                           unsigned int x,y;			for(x=z;x>0;x--)for(y=1;y>0;y--);
}
void DHT11_delay_us(u8 n)
{while(--n);
}
void DHT11_delay_ms(u16 z)               //定义DHT11延迟函数
{u16 i,j;for(i=z;i>0;i--)for(j=110;j>0;j--);
}void DHT11_start()
{Data=1;DHT11_delay_us(2);Data=0;DHT11_delay_ms(20);   //延时18ms以上Data=1;DHT11_delay_us(30);
}
u8 DHT11_rec_byte()      //接收一个字节
{u8 i,dat=0;for(i=0;i<8;i++)       //从高到低依次接收8位数据{          while(!Data);       //等待50us低电平过去DHT11_delay_us(8);   //延时60us，如果还为高则数据为1，否则为0 dat<<=1;           //移位使正确接收8位数据，数据为0时直接移位if(Data==1)        //数据为1时，使dat加1来接收数据1dat+=1;while(Data);       //等待数据线拉低    }  return dat;
}
void DHT11_receive()      //接收40位的数据{u8 R_H,R_L,T_H,T_L,revise; DHT11_start();if(Data==0){while(Data==0);   //等待拉高     DHT11_delay_us(40);      //拉高后延时80usR_H=DHT11_rec_byte();    //接收湿度高八位  R_L=DHT11_rec_byte();    //接收湿度低八位  T_H=DHT11_rec_byte();    //接收温度高八位  T_L=DHT11_rec_byte();    //接收温度低八位revise=DHT11_rec_byte(); //接收校正位DHT11_delay_us(25);      //结束if((R_H+R_L+T_H+T_L)==revise)      //校正{RH=R_H;RL=R_L;TH=T_H;TL=T_L;} }}
void beepon()                                                //PWM(如果你是无源蜂鸣器，这里写PWM函数)
{	                                                     //当前为有源蜂鸣器，有源蜂鸣器无需更改beep=0;delay(1200);beep=1;     
}	 
void write_nian();                                  //预定义
void write_yue();
void write_tian();
void write_shi();
void write_fen();
void write_miao();
void write_week();
void zhuanhuan();
void write_temp();
void write_nz();
void nzON();
void write_setsuccess();
void beiguangpd();void write_com(u8 com)                                    //LCD1602初始化程序，了解1602时序图后新手的话可以直接照搬使用                                     
{lcdrs=0;P0=com;delay(5);lcden=1;delay(5);lcden=0;
}
void write_data(u8 date)
{lcdrs=1;P0=date;delay(5);lcden=1;delay(5);lcden=0;
}
void init()
{lcdrw=0;lcden=0;write_com(0x38);write_com(0x0c);write_com(0x06);write_com(0x01);write_com(0x80+0x10);  
}	
void Timer0Init()	                                            //定时器0工作方式1 中断初始化，923位12M晶振在KEIL仿真后的计算结果
{   TMOD=0X01;TH0=(65535-901)/256;	TL0=(65535-901)%256;	ET0=1;                                          //打开定时器0中断允许位EA=1;                                         //打开总中断允许TR0=1;			                         //打开 定时器0，开始计时
}Init_DS18B20(void)                                    //DS18B20初始化与时序图程序，仿真时温度问题改进这个初始化程序就解决了{ DQ=1;delay(70); DQ=0; delay(485); DQ=1; delay(50); } 
ReadOneChar(void)                                      //18B20读一个字节 {  unsigned char i=0; unsigned char dat=0; for (i=8;i>0;i--) { DQ=1; delay(1); DQ=0; dat>>=1; DQ=1; if(DQ) dat|=0x80; delay(4); } return(dat); }  
WriteOneChar(unsigned char dat)                     //18B20写一个字节{ unsigned char i=0; for(i=8;i>0;i--) { DQ=0; DQ=dat&0x01; delay(5); DQ=1; dat>>=1; } delay(4); } 
ReadTemperature(void)                           //读取温度函数定义，返回值为浮点数{ Init_DS18B20(); WriteOneChar(0xcc); WriteOneChar(0x44); delay(125); Init_DS18B20(); WriteOneChar(0xcc); WriteOneChar(0xbe); tempL=ReadOneChar(); tempH=ReadOneChar(); if(tempH>0x7f){tempH=~tempH;tempL=~tempL+1;wendufu=1;}elsewendufu=0;temperature=(((tempH*256)+tempL)*0.0625)*10;delay(200); return(temperature); } 
void welcome()                                       //定义欢迎函数
{ static u8 i;init();                                              //初始化1602delay(5000);for(i=0;i<16;i++){write_com(0x80+i);write_data(thanks[i]); delay(4000);}delay(50000);for(i=0;i<14;i++){write_com(0x81+0x40+i);write_data(make[i]);delay(4000);}delay(50000);delay(50000);
}void pdtian1()                          //PD在上电后设置完毕主界面处的天数判断
{if((p==1||p==3)||(p==5||p==7)||(p==8||p==10)||p==12)	tianmax=31;if((p==4||p==6)||(p==9||p==11))tianmax=30;if(p==2){if(((y%4==0)&&(y%100!=0))||(y%400==0))tianmax=29;elsetianmax=28;}
}
void pdxingqi1()                     //PD在上电后设置完毕至主界面处的星期判断
{static char c,yi,mt,xwk1,xwk2,xwk3;static int xwk,yn,xwk4;yn=y;if(p==1||p==2){ yn=yn-1; mt=p+12;}elsemt=p;yi=yn%100;c=yn/100;xwk1=yi+(yi/4);xwk2=c/4;xwk3=2*c;xwk4=(26*mt+26)/10;xwk=xwk1+xwk2-xwk3+xwk4+o-1;while(xwk<0){xwk+=7; }wk=xwk%7;
}
void Display()                                //定义主程序 显示部分函数模块
{  	 static u16 xunhuan;RH=RH%100;write_nian();                          //1602写入显示年write_com(0x84);write_data('-');                               write_yue();                        //写入月write_com(0x87);write_data('-');write_com(0x88);write_tian();                         //写入天write_week();write_shi();write_com(0x82+0x40);write_data(':');write_fen();write_com(0x85+0x40);write_data(':');write_miao();	                   //写入温度，温度TEM1与2与3是温度的三位数							 xunhuan++;if(xunhuan<180){if(wendufu==1){	if((temper/100)!=0){write_com(0x89+0x40); write_data('-'); write_com(0x8a+0x40); write_data(tem1);   }else{write_com(0x89+0x40); write_data(' ');  write_com(0x8a+0x40); write_data('-');  }}else {write_com(0x89+0x40); write_data(' ');if((temper/100)!=0)  {write_com(0x8a+0x40); write_data(tem1);}else{write_com(0x8a+0x40); write_data(' ');} }write_com(0x8b+0x40);write_data(tem2);write_com(0x8c+0x40);write_data('.');write_com(0x8d+0x40);write_data(tem3);write_com(0x8e+0x40);write_data(0xdf);write_com(0x8f+0x40);write_data('C');}if(xunhuan>180){write_com(0x89+0x40); write_data(' ');write_com(0x8a+0x40); write_data(' ');write_com(0x8b+0x40); write_data(RH/10+0x30);write_com(0x8c+0x40); write_data(RH%10+0x30);write_com(0x8d+0x40); write_data('%');write_com(0x8e+0x40);write_data('R');write_com(0x8f+0x40); write_data('H');}if(xunhuan==360)xunhuan=0;	  
}
void NZdisplay()                                    //定义闹钟模块
{static u8 nzflag=2,nzwei;                        delay(2000); init();delay(2000);nzON();                                         //闹钟开关选择模块while(k4)                                     //没有检测到K4键退出时无限循环{  write_nz();                         //写入闹钟模块if(k3==0)                        //判断K3键是否按下{ delay(5000);if(k3==0)                      //延时消抖{beepon();                       //响一声if(nxflag==0)                        //如果NXFLAG为0，闹钟为关闭状态，给其赋值为1，nxflag=1;elsenxflag=0;                                }nzON();                           //判断闹钟的状态}if(k1==0)                             //如果K1键按下后{delay(8000);if(k1==0){beepon();if(nzwei==0)                             //通过NZWEI来判断当前光标的位置与设置小时还是分钟nzflag=0;if(nzwei==1)nzflag=1;} }if(nzflag==0){ while(1){	write_com(0x83+0x40);             //光标闪烁write_data(0xff);delay(5000);write_nz();                        //写入闹钟delay(5000); if(k2==0)                           //如果K2为0{delay(50);if(k2==0){ beepon();                         //判断小时状态，进行+1if(n<23)n+=1;elsen=0;}}if(k3==0)                         //如果K3为0{delay(50);if(k3==0)                       //判断小时状态，进行-1 最大溢出重回最小，最小溢出重回最大{ beepon();if(n>0)                          n-=1;elsen=23;}}if(k1==0){ delay(1000);                  //如果K1按下，更改NZFLAG，更改闹钟光标位if(k1==0){nzflag=1;	beepon();break;}}if(k4==0)                          //如果K4按下，退出。给NZFLAG重新赋值为2，取消光标并下次进入不会直接进入光标{beepon();delay(6000);nzflag=2;nzwei=0;break;	 }}}if(nzflag==1)                             //如果NZ为1，同上，此时为分钟调节{  while(1){	write_com(0x86+0x40);write_data(0xff);delay(5000);write_nz();delay(5000);if(k2==0){delay(50);if(k2==0){ beepon();if(m<59)m+=1;elsem=0;}}if(k3==0){delay(50);if(k3==0){ beepon();if(m>0)m-=1;elsem=59;}}if(k1==0){delay(1000);if(k1==0){beepon();nzflag=0;break;}}if(k4==0){ beepon();delay(6000);nzflag=2;nzwei=1;break;	 }}}if(k4==0){beepon();delay(30000);break;}	}nzflag=2;init(); 
}
void temperwaring()                           //定义温度警报模块
{  static u8 temflag=2,temwei;                        delay(5000);init();delay(5000);while(k4){ 	write_temp();                                //写入温度if(k3==0)                           //如果K3为0，为其赋值为N0-N0，关闭温度警报，并且不会闪烁光标{ beepon();delay(3000);tempwarn=(0X4e-0x30)*100;tempwarn1=(0X4e-0x30)*100;}if(k1==0)                        //如果K1为0，进入光标位，光标闪烁，根据temwei不同进入不同的初始闪烁位置{delay(8000);               if(k1==0){beepon();if(temwei==0)                     //为只需单独打开温度上限或下限报警时提供方便temflag=0;if(temwei==1)temflag=1;} }if(temflag==0)                       //和闹钟模块 类似，如果temflag为0的话进入下限调整，否则进入上限调整{ while(1){	write_com(0x86+0x40);write_data(0xff);delay(6000);write_temp();delay(4000);if(k2==0){delay(50);if(k2==0){ beepon();if(tempwarn<500)                              //温度范围为精确到小数点后1位，500为50.0度，自己设置每次只调节1度tempwarn+=10;                                 //如果需要温度报警精确到0.1度，请将此处改为1并重新修改界面elsetempwarn=0;}}if(k3==0)                  {delay(50);if(k3==0){ beepon();if(tempwarn>0&&(tempwarn!=(0X4e-0x30)*100))       //K3键按下，判断当在关闭状态与一般状态时，温度阀门下限减1度tempwarn-=10;elsetempwarn=500;}}if(k1==0)                                 //如果检测K1按下，跳出循环，给FLAG重新赋值为1，光标开始在温度上限处闪烁{ delay(1000);                              //并且开始调节温度上限temflag=1;	                                beepon();break;}if(k4==0)                            //如果K4等于0，第一次确定，光标停止闪烁，K2K3不会更改数值{                                    //目的是在确定无误后在下次按下K4时可以直接退出beepon();delay(6000);                    temflag=2;temwei=0;break;	 }}}if(temflag==1)                   //进入温度修改上限部分，同温度修改下限{  while(1){	write_com(0x89+0x40);write_data(0xff);delay(6000);write_temp();delay(4000);if(k2==0){delay(50);if(k2==0){ beepon();if(tempwarn1<500)tempwarn1+=10;elsetempwarn1=0;}}if(k3==0){delay(50);if(k3==0){ beepon();if((tempwarn1>0)&&(tempwarn1!=(0X4e-0x30)*100))tempwarn1-=10;elsetempwarn1=500;}}if(k1==0){beepon();delay(1000);temflag=0;break;}if(k4==0){ beepon();delay(6000);temflag=2;temwei=1;break;	 }}}if(k4==0)                                           //当光标不闪烁时，按下K4键，直接退出{beepon();delay(30000);break;}	}temflag=2;                           //temflag重新赋值为2，目的是确保下次进入不会直接进入光标调节模块init();ET0=1;                       //这样就可以方便的快速关闭温度报警及快速设置上下限}
void miaobiaods()                           //定义秒表显示模块
{static u8 i,times;delay(1000);init();delay(10000);while(1)
{ 
if(MB1==10000)                           //MB1位16位数，所以秒表在0.00-100.00的计数范围使用MB1，超出后清0累加MB2
{MB1=0;MB2++;}if(MB2==100)                  //如果秒表超出了10000秒，直接清零，若想修改更大秒表范围请将MB2定义为16位数再修改，并修改显示界面{MB2=0;MB1=0;mbflag=0;}for(i=0;i<9;i++)                   //1602循环显示STOPWATCH{write_com(0x84+i);write_data(MB[i]);				}write_com(0x83+0x40);                   //显示秒表运行状态模块write_data(times/10+0x30);write_com(0x84+0x40);write_data(times%10+0x30);                 //TIMES为计数部分，不为0时每次暂停可以计数一次write_com(0x86+0x40);write_data(MB2/10+0x30);write_com(0x87+0x40);                     //秒表高位MB2与低位MB1转换为16进制数显示write_data(MB2%10+0x30);write_com(0x88+0x40);write_data('.');write_data((MB1/1000)+0x30);write_com(0x8a+0x40);write_data(MB1%1000/100+0x30);write_com(0x8b+0x40);write_data('.');write_com(0x8c+0x40);write_data(MB1%1000%100/10+0x30);write_com(0x8d+0x40);write_data(MB1%1000%100%10+0x30);if(k1==0)                                      //由于秒表对精度要求很高，必须直接中断不能延时{mbflag=1;                                     //因此也不能只用一个K1进行开始于暂停beepon();	}                             //此时按下K1键为打开秒表，会有立刻的响铃以便直观表明计时开始if(k2==0)                                             //和以上原因一样，秒表暂停{mbflag=0;                                           //按下K2键为暂停beepon(); if(MB1!=0)                                          //如果不为0，计次+1{ delay(40000);if(times<99)                                       //计次范围0-99times+=1;}}if(k3==0)                                         //按下K3，秒表数据清0{beepon();mbflag=0;times=0;MB1=0;MB2=0;}if(k4==0){beepon();                             //K4为0，退出秒表，如果打开秒表也可直接退出，秒表与时间并不冲突break;}}delay(1000);init();                            //延时初始化，确保时间充足无乱码delay(10000);
}
void naozhongfamen()                            //主界面上判断是否进入闹钟设置界面的模块 
{ if(k3==0){	delay(50000);                                  //如果K3长按，进入闹钟if(k3==0){beepon();delay(3000);NZdisplay();delay(10000);write_setsuccess();delay(30000);                                    init();}}
}
void wendufamen()                                 //主界面上判断是否进入温度报警设置界面的模块 
{ if(k2==0){	delay(50000);if(k2==0){ beepon();delay(3000);temperwaring();                                    delay(10000);write_setsuccess();delay(30000);init();}}
}
void miaobiao()                       //主界面上判断是否进入秒表的模块 
{  if(mbflag==1)
{if(MB1>10000)
{MB1=0;MB2++;}if(MB2==100){MB2=0;MB1=0;mbflag=0;}
}if(k4==0){ delay(50000);if(k4==0){beepon();delay(3000);miaobiaods();delay(10000);init();}}
}
void Timer0() interrupt 1	               //定义中断函数，923为12M晶振的精度，如果是11.05M晶振请根据仿真或实测自行改变这个值
{	 static u16 i;	TH0=(65535-901)/256;	TL0=(65535-901)%256;	i++;                                   //i为秒，不断累加beiguangpd();                              //进行背光判断，确保背光第一时间响应if(mbflag==1){                                         //如果检测到打开秒表了，就开始秒表位累加mbw++;if(mbw==10){mbw=0;MB1++;}}if(i==1000)                           //如果检测到1000，秒+1{k++; i=0;if(beiguang<60)                       //如果背光变量小于60，此时背光打开beiguang++;buchang++;	 DHT11_receive();temper=ReadTemperature();               //检测温度，检测周期是1S}	if(k==60)                                  //判断各个变量，也可将这些放到其他模块里，但是精度未必会提高{k=0;e++;}if(buchang==4955)                                     //精度补偿部分，不一定适合你的晶振{buchang=0;k+=1;}if(e==60){e=0;d++;}if(d==24){ d=0;o++;if(wk<6)wk++;elsewk=0;}if(o==tianmax+1){o=1;p++;}if(p==13){p=1;y++;}
}	 
void bijiao()                                 //比较模块，也是报警触发模块
{static u8 gbflag;if(m==e&&n==d)                                  //如果闹钟时间相同，开始响铃，时长1分钟{if(gbflag==0)                                   //如果不是在响铃并按键关闭后，才会响铃
{if(nxflag==1)                                 //如果闹钟为开启状态响铃，否则不响beepon();if(k2==0||k3==0||k4==0)                        //如果有K2，K3，K4任何一个按键触发，就会将gbflag设置为1，停止响铃gbflag=1;                                       //因为K1键快速按下还有快捷粗调暂停1秒的功能，所以没有K1键}}elsegbflag=0;                              //响铃完毕后给gbflag赋值为0；if(e==0&&k==0)                                      //整点报时模块，设置为7到24点整点报时，可改范围，不会影响休息也比较合适{if((d>6&&d<24)||d==0)beepon();}			if((tempwarn!=(0X4e-0x30)*100)){if(wendufu==1)beepon();}if((tempwarn!=(0X4e-0x30)*100)||(tempwarn1!=(0X4e-0x30)*100))          //判断温度阀门打开了上限还是下线还是关闭还是上下限同时打开{ if((tempwarn==(0x4e-0x30)*100)&&(tempwarn1!=(0X4e-0x30)*100))               //判断完毕后只要触发就会报警{if(tempwarn1<temper){beepon();}}if((tempwarn!=(0x4e-0x30)*100)&&(tempwarn1==(0X4e-0x30)*100)){if(tempwarn>temper)beepon();}if((tempwarn!=(0X4e-0x30)*100)&&(tempwarn1!=(0X4e-0x30)*100)){ if((tempwarn>temper)||(tempwarn1<temper)){beepon();		}}}
}
void zhuanhuan()                                   //转换模块，将时间变量转换为1602的16位显示数值
{ nian1=(y/1000)+0x30;nian2=(y%1000/100)+0x30;nian3=(y%1000%100/10)+0x30;nian4=(y%1000%100%10)+0x30; yue1=(p/10)+0x30;yue2=(p%10)+0x30;tian1=(o/10)+0x30;tian2=(o%10)+0x30;shi1=(d/10)+0x30;shi2	=(d%10)+0x30;fen1=(e/10)+0x30;fen2=(e%10)+0x30;miao1=(k/10)+0x30;miao2=(k%10)+0x30;tem1=(temper/100)+0x30;tem2=(temper%100/10)+0x30;tem3=(temper%100%10)+0x30;
}
void tiaojie()                                         //光标调节时间模块
{ static u8 flag=0;	   if(k1==0)                                           //检测到K1按下一段时间后，开始调节光标{	 delay(30000);if(k1==0){beepon();                                                 //因为会关闭中断并且停秒，所以给软件补偿buchang值清0buchang=0;  while(1){ ET0=0; pdtian1();                                       //此时中断已关闭，开始循环判断pdxingqi1();                                       //判断天数与星期，比如在将时间调到3月31号后再调到2月zhuanhuan();                                    if(o>tianmax)o=tianmax;write_week();                                     //天数就会自动调节到28日，确保不会超出范围，并自动调出星期write_tian();if(k4==0)                                                           //如果按下K4，就停止时间光标调节并跳出循环{beepon(); break;}if(flag==0)                                //flag调节位置判断位{ write_miao();delay(5000);write_com(0x87+0x40);write_data(0xff);delay(5000);if(k2==0){                                    //此时调秒beepon();if(k<59)  k+=1;else  k=0;}if(k3==0){beepon(); if(k>0) k-=1;else k=59;}	if(k1==0){beepon();flag+=1;	}write_miao();}if(flag==1)                                      //此时调分{  write_fen();delay(5000);write_com(0x84+0x40);write_data(0xff);delay(5000);if(k2==0){beepon(); if(e<59) e+=1;else e=0;	 }if(k3==0){beepon();if(e>0)  e-=1;else    e=59;}if(k1==0){ beepon();flag+=1;	 }write_fen();} if(flag==2)                                          //此时调时{  write_shi();delay(5000);write_com(0x81+0x40);write_data(0xff);delay(5000);if(k2==0){beepon(); if(d<23) d+=1;else  d=0;	}if(k3==0){beepon();if(d>0) d-=1;else   d=23;}if(k1==0){beepon();flag+=1;}write_shi();}if(flag==3)                                      //此时调天   天、月、年会影响星期，所以在这里加入判断星期模块{ write_tian();delay(5000);write_com(0x89);write_data(0xff);delay(5000);if(k2==0){beepon(); if(o<tianmax)o+=1;else o=1;	}if(k3==0){beepon();pdtian1();if(o>1)o-=1;else	o=tianmax;}if(k1==0){ beepon();flag+=1;}write_tian();}if(flag==4){   write_yue();                                                //此时调月delay(5000);write_com(0x86);write_data(0xff);                                //循环闪烁光标delay(5000);if(k2==0){beepon();if(p<12)p+=1;else p=1;	 }if(k3==0){beepon();if(p>1)p-=1; elsep=12;if(o>tianmax)o=tianmax;}if(k1==0){beepon(); flag+=1; }write_yue();}if(flag==5){     write_nian();                               //此时调年delay(5000);write_com(0x83);write_data(0xff);delay(5000);if(k2==0){ beepon();if(y<9999)y+=1;elsey=1; }if(k3==0){beepon(); if(y>0)y-=1;else y=9999;}if(k1==0){beepon();flag=0;}write_nian(); }//调节完毕并且K4确认后打开中断允许，开始走时}}   }ET0=1;}
void beiguangpd()                                         //背光判断模块
{if(k1==0||k2==0||k3==0|k4==0){	if(bg==1)                                        //如果再背光熄灭的情况下 ，按下任何键都会打开背光并响铃beepon();beiguang=0;                                    //无论是否熄灭，按下都会清零}if(beiguang==60)                      //如果检测到没有按键60S，背光自动熄灭bg=1;else bg=0;
}
void main()                                   //主函数
{	  bg=0;y=2017;p=5;o=25;DHT11_receive(); temper=ReadTemperature();welcome();                                    //欢迎NZdisplay();                                   //断电后第一个调节闹钟init();	 Timer0Init();                               //初始化定时器，但是没有打开ET0                             ET0=1;                             init();                                     //调节完毕后延时初始化并延时足够时间，确保不会乱码delay(50000);while(1)                                       //循环各个模块且不会冲突{ zhuanhuan();                                   bijiao();tiaojie();naozhongfamen();wendufamen();miaobiao();pdtian1();pdxingqi1();Display();}
}
void write_week()                                //1602写并显示星期模块
{  static u8 i;	switch (wk){case(1):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week1[i]);}break;case(2):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week2[i]);}break;case(3):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week3[i]);}break;case(4):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week4[i]);}break;case(5):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week5[i]);}break;case(6):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week6[i]);}break;case(0):for(i=0;i<5;i++){ write_com(0x8b+i);write_data(week7[i]);}break;}
}
void write_nian()                        //1602写并显示年模块
{write_com(0x80);write_data(nian1);write_com(0x81);write_data(nian2);write_com(0x82);write_data(nian3);write_com(0x83);write_data(nian4);
}
void write_yue()                                  //1602写并显示月模块
{ write_com(0x85);write_data(yue1);write_com(0x86);write_data(yue2);
}
void write_tian()                         //1602写并显示天模块
{write_com(0x88);write_data(tian1);write_com(0x89);write_data(tian2);
}
void write_shi()                             //1602写并显示时模块
{write_com(0x80+0x40);write_data(shi1);write_com(0x81+0x40);write_data(shi2);
}
void write_fen()                              //1602写并显示分模块
{write_com(0x83+0x40);write_data(fen1);write_com(0x84+0x40);write_data(fen2);
}
void write_miao()                             //1602写并显示秒模块
{write_com(0x86+0x40);write_data(miao1);write_com(0x87+0x40);write_data(miao2);
}
void write_temp()                            //1602写并显示温度报警设置模块
{ static i;for(i=0;i<13;i++){write_com(0x82+i);write_data(tempwarng[i]);}for(i=0;i<3;i++){write_com(0x80+i+0x40);write_data(temmin[i]);}write_com(0x83+0x40);write_data(0x7e);for(i=0;i<3;i++){write_com(0x8d+i+0x40);write_data(temmax[i]);}write_com(0x8c+0x40);write_data(0x7f);write_com(0x85+0x40);write_data(tempwarn/100+0x30);write_com(0x86+0x40);write_data((tempwarn%100/10)+0x30);write_com(0x87+0x40);write_data('-');write_com(0x88+0x40);write_data(tempwarn1/100+0x30);write_com(0x89+0x40);write_data((tempwarn1%100/10)+0x30);
} 
void nzON()                                           //1602写并显示闹钟设置打开及关闭模块
{ static u8 i;if(nxflag==0)
{    for(i=0;i<3;i++){write_com(0x8b+0x40+i);write_data(naozhongOFF[i]);}}if(nxflag==1)
{    for(i=0;i<3;i++){write_com(0x8b+0x40+i);write_data(naozhongON[i]);}}
}
void write_setsuccess()                                   //1602写并显示设置成功
{static u8 i;for(i=0;i<12;i++){write_com(0x82+i);write_data(setsucces[i]);}for(i=0;i<16;i++){write_com(0x80+i+0x40);write_data(thanksu[i]);}
}
void write_nz()                                           //1602写并显示闹钟设置模块
{	  static u16 n1,n2,m1,m2,i;	  n1=(n/10)+0x30;n2=(n%10)+0x30;m1=(m/10)+0x30;m2=(m%10)+0x30;for(i=0;i<16;i++){write_com(0x80+i);write_data(set[i]);}write_com(0x82+0x40);write_data(n1);write_com(0x83+0x40);write_data(n2);write_com(0x84+0x40);write_data(':');write_com(0x85+0x40);write_data(m1);write_com(0x86+0x40);write_data(m2);			   
}