基于51单片机的电子钟设计及Proteus仿真

#include"reg52.h" //#include"AT24C02.h" #include"DS18B20.h" #include"LCD1602.h" sbit key1=P1^0;//module sbit key2=P1^1;//add sbit key3=P1^2;//minus sbit key4=P1^3;//pause，confirm sbit beeper=P1^4; unsigned int k1=0; unsigned int num0,num,sec,min,hour; int wendu; char code tableup[]="2018-05-19"; int *p1=&hour;int *p2=&min;int *p3=&sec;//全局变量即使写在main函数中也不行，必须写在预编译区 void delayms(unsigned int xms) { int m,n; for(m=xms;m>0;m--) for(n=113;n>0;n--); } void beep() { beeper=1; delayms(250); beeper=0; } void Timer0_init() { TMOD=0x01; TH0=0xee; TL0=0x00; EA=1; ET0=1; TR0=1;//attention,the initial value should be set to "1"！ } void write_hms(unsigned char addr,unsigned char dat) { unsigned char shi,ge; shi=dat/10; ge=dat%10; write_com(0x80+0x40+addr); write_com(0x0f);//cursor located write_data(0x30+shi); write_data(0x30+ge); } int jiajian(int *hms) //hms是形参，hms的改变无法引起hour的改变 { if(key2==0) { delayms(5); if(key2==0) { while(!key2); beep(); (*hms)--;//形参运算，实参并未发生改变，形参hms只是从hour实参获得了值 if(k1==3)//hour { if(hms==-1)*hms=23; } else { if(hms==-1)*hms=59; } } } if(key3==0) { delayms(5); if(key3==0) { while(!key3); beep(); (*hms)++; if(k1==3)//hour { if(hms==24)*hms=0; } else { if(hms==60)*hms=0; } } } return *hms; } void keyscan() { //key1为功能键，设计时需要根据key1按下的次序来完成对hms的设置，以及何时开关定时器TR0 //先按key1》》k1=1》》关TR0，暂停计时》》设置时分秒》》退出设置，清零k1 if(key1==0)//功能 { delayms(5); if(key1==0) { while(!key1); beep(); k1++; if(k1==5)//退出时间设置的同时顺便清零k1 { TR0=1; k1=0; } } } if(k1!=0) { switch(k1) { case 4://sec write_com(0x80+0x40+5); write_com(0x0f); hour=jiajian(p1); write_hms(4,hour); break; case 3: // write_hms(7,min); // delayms(2); write_com(0x80+0x40+8); write_com(0x0f); min=jiajian(p2); write_hms(7,min); break; case 2: // int *p3=&sec write_com(0x80+0x40+11); write_com(0x0f); sec=jiajian(p3); write_hms(10,sec); break; case 1://暂停计时 TR0=0; write_com(0x0f); break; } } } //void disp_wendu() //{ // // write_com(0x80+11); // write_data(wendu/1000%100);//十位0316 // write_data(wendu%100/10);//个位 // write_data('.'); // write_data(wendu%10);//小数点一位 // write_data('C'); //} void main() { // int *p1=&hour;int *p2=&min;int *p3=&sec;// invalid extern statement! Timer0_init(); // DS18B20_init(); lcd1602_init(); write_com(0x80); hour=12;min=0;sec=0; // wendu=get_temp(); // for(num0=0;num0++;num0<=10) //vital FAILURE!!! for(num0=0;num0<=10;num0++)//切记：if、for内部的顺序以及是否多余分号 { write_data(tableup[num0]); delayms(5); } write_com(0x80+0x40+6); write_data(':'); write_com(0x80+0x40+9); write_data(':'); write_hms(4,hour);write_hms(7,min);write_hms(10,sec); while(1) { keyscan(); // disp_wendu(); } } void T0_time()interrupt 1 { TH0=0x4c; TL0=0xcf; num++; if(num==50) { sec++; // wendu=get_temp(); // disp_wendu();//write_data(wendu); //wendu不能作为参数，因为他是字符串而非char型 num=0; if(sec==60) { sec=0; min++;write_hms(7,min); if(min==60) { min=0; hour++;write_hms(4,hour); } }write_hms(10,sec); } }