电子时钟基于AT89c51单片机的设计电子时钟原理图开机显示仿真图:当按下仿真键时电子时钟开机页面显示第一行显示JD12102Class--16,第二行显示动态TINE:12:00:04。电子时钟调时间仿真图:当按下K1为1次时,光标直接跳到电子时钟的秒,可以按下K2进行调节。当按下K1为2次时,光标直接跳到电子时钟的分,可以按下K2进行调节。当按下K1为3次时,光标直接跳到电子时钟的时,可以按下K2进行调节。当按下K1为4次时,光标直接跳完,电子时钟可以进行正常计时。电子时钟闹钟调节仿真:当按下K3为1次时,直接跳到闹钟显示界面00:00:00,按下K2可以对闹钟的秒进行调节。当按下K3为2次时,可以调到分,按下K2可以对闹钟的分进行调节。当按下K3为3次时,可以调到时,按下K2可以对闹钟的时进行调节。当按下K3为4次时,直接跳到计时界面,对闹钟进行到计时,时间到可以发出滴滴声。#includereg51.h#defineucharunsignedchar//预定义一下#defineuintunsignedintuchartable[]=JD12102Class--21;//显示内容sbitlcden=P3^4;//寄存器EN片选引脚sbitlcdrs=P3^5;//寄存器RS选择引脚sbitbeep=P3^6;//接蜂鸣器externvoidkey1();externvoidkey2();externvoidkey3();ucharnum,hour=12,minite,second,ahour,aminite,asecond,a,F_k1,F_k2,F_k3;//定义变量voiddelay(uintz)//延时{uintx,y;for(x=z;x0;x--)for(y=110;y0;y--);}voidwrite_com(ucharcom){lcdrs=0;P0=com;//送出指令,写指令时序delay(5);lcden=1;delay(5);lcden=0;}voidwrite_data(uchardate){lcdrs=1;P0=date;//送出数据,写指令程序delay(5);lcden=1;delay(5);lcden=0;}voidwrite_add(ucharadd,uchardate){ucharaa,bb;aa=date/10;bb=date%10;write_com(0x80+add);write_data(0x30+aa);write_data(0x30+bb);}voidinit()//初始化{lcden=0;write_com(0x38);//设置16*2显示,5*7点阵write_com(0x0c);//开显示,不显示光标write_com(0x06);//地址加1,写入数据是光标右移1位write_com(0x01);//清屏write_com(0x80);//起点为第一行第一个字符开始}voiddisplay(ucharh,ucharm,uchars)//显示设计程序{{write_com(0x80+0x16);}{write_com(0xC0+0x00);write_data('T');write_data('I');write_data('M');write_data('E');write_data(':');write_data(0x30+(h/10));write_data(0x30+(h%10));write_data(':');write_data(0x30+(m/10));write_data(0x30+(m%10));write_data(':');write_data(0x30+(s/10));write_data(0x30+(s%10));write_data('');write_data('');write_data('');}}voidmain(){init();TMOD=0X01;//设置T0定时方式1TH0=(65535-50000)/256;//设置初值TL0=(65535-50000)%256;EA=1;//开总中断TR0=1;//启动T0ET0=1;for(num=0;num16;num++)//依次读出数据{write_data(table[num]);}while(1){key1();key2();key3();if(ahour==hour&&aminite==minite&&second10)//时间到闹钟响{beep=~beep;}if(F_k1==0&F_k3==0)//K1和K3按下次数为零就直接显示时分秒display(hour,minite,second);}}voidtimer0()interrupt1//T0中断函数{TH0=(65535-50000)/256;//装载计数器初值TL0=(65535-50000)%256;a++;if(a==20){//进位设置60秒进1分,60分进1时,24时进0时a=0;second++;if(second==60){second=0;minite++;if(minite==60){minite=0;hour++;if(hour==24){hour=0;}}}}}#includereg51.h//调时间程序#defineucharunsignedchar#defineuintunsignedintsbitk1=P1^0;//定义3个变量sbitk2=P1^1;sbitk3=P1^2;externucharF_k1,F_k3,second,minite,hour,ahour,aminite,asecond;//预定义变量externvoidwrite_com(ucharcom);externvoidwrite_add(ucharadd,uchardate);externvoiddisplay(ucharh,ucharm,uchars);voiddelay_key(inti){while(i--);}voidkey1(){if(k1==0)//按下K1零次时,直接计时与开机显示{delay_key(100);if(k1==0){TR0=0;while(!k1);F_k1++;if(F_k1==4){F_k1=0;write_com(0x0c);TR0=1;}}}if(F_k1==1|F_k3==1){write_com(0xC0+0x0c);write_com(0x0f);}if(F_k1==2|F_k3==2)write_com(0xC0+0x09);if(F_k1==3|F_k3==3)write_com(0xC0+0x06);}voidkey2(){if(k2==0){delay_key(100);{while(!k2);if(F_k1==1)//按下K1一次时设置闹钟的秒{second++;if(second==60)second=0;write_add(0x4b,second);}if(F_k1==2)//按下K3两次时设置闹钟的分{minite++;if(minite==60)minite=0;write_add(0x48,minite);}if(F_k1==3)//按下K1三次时设置闹钟的时{hour++;if(hour==24)hour=0;write_add(0x45,hour);}if(F_k3==1)//按下K3一次时设置闹钟的秒{asecond++;if(asecond==60)asecond=0;write_add(0x4b,asecond);}if(F_k3==2)//按下K3两次时设置闹钟的分{aminite++;if(aminite==60)aminite=0;write_add(0x48,aminite);}if(F_k3==3)//按下K3三次时设置闹钟的时{ahour++;if(ahour==24)ahour=0;write_add(0x45,ahour);}}}}voidkey3(){if(k3==0){delay_key(100);if(k3==0){while(!k3);F_k3++;if(F_k3==4)//K3等于四次时直接跳入闹钟显示{F_k3=0;write_com(0x0c);}if(F_k3==1)display(ahour,aminite,asecond);}}}