数字时钟89C52 单片机C语言程序STC89C52|/************** 【数字时钟】****************//****【功能】1、时间显示2、秒表3、闹钟4、日期显示都可以设置****/#include <reg52.h> /*包含器件配置文件*/#define uchar unsigned char /*宏定义字符型数据整型数据*/#define uint unsigned intuchar code H[] = {0x0f, 0x07, 0x0b, 0x0d, 0x0e}; /*按键【P3】端口断码用于按键*/ char Code[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d,0x7d, 0x07, 0x7f, 0x6f}; /*显示【0 1 2 3 4 5 6 7 8 9】数字的数码管的段码*/ uchar code C[] = {0x0, 0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF, 0x7F};/*列扫描控制LED1位2位3位4位5位6位7位8位*/uchar MON[]={0,31,28,31,30,31,30,31,31,30,31,30,31};uchar A;uchar BIN=0; /* 【BIN】作为倒计时开始的标志*/uchar hour = 0; /* 定义[时][分][秒] */uchar min = 0;uchar sec = 0;uint shi=12;uint fen=30;uchar Mmin=0;uchar Msec=30;uchar M0=0;uchar m=0;uchar year=9;uchar month=7;uchar month2;uchar day=19;uchar set1 = 1; /* set1=1 是调节时分秒set1=2时时调节年月日set=3时事调节闹钟*/uchar set2 = 1; /* set2=1时是调节【时】位set2=2时事调节【分】位*/uint x = 0; /* x 每【0.01s】自加一*/void Delay(uint k);void Timer0() /*定时器T0 5mS初始化*/{TMOD = 0x01; /*设置*定时器0**计数方式一* （每12个时钟脉冲计数一次）或IT0=1 第二种计数方式*/TH0 = (65536 - 10000) / 256; /*给定计时器高位赋予初值=15536/256*/TL0 = (65536 - 10000) % 256; /*给定计时器低位赋予初值=15536%256 */ET0 = 1; /*打开定时器外部终断0允许ET1是中断器1的开关*/EA = 1; /*打开总中断允许*/TR0 = 1;}void T0_srv(void) interrupt 1 /*5mS定时中断服务函数秒分时的值*/{TH0 = (65536 - 10000) / 256; /*给定计时器高位赋予初值=15536/256*/TL0 = (65536 - 10000) % 256; /*给定计时器低位赋予初值=15536%256 */x++;if(x==100){sec++;x=0; /*没每一秒【sec】加一*/if(sec==60){min++;sec=0;if(min==60) /*每一分钟【min】加一*/{min = 0;hour++;if(hour==24){hour = 0; /*每一小时【hour】加一*/day++;if(year%4==0) /*是否闰年的判断*/MON[2]=29;else MON[2]=28;if(day==MON[month]){day=0;month++;}}}}}if(BIN==1){if(Mmin!=0||Msec!=0){M0 = 100-x;if(M0==100){ if(Mmin>0){Msec--;if(Msec==0){Msec=60;Mmin-- ;}if(Msec==0) {Mmin=0;Msec=0;M0=0;} }if(Mmin==0){if(Msec!=0)Msec--;if(Msec==0){Msec=0;M0=0;}}}}if(Mmin==0&&Msec==0){M0=0;}} /*秒表分秒M0的赋值*/}void Scan_key() /*按键扫描函数【Scan_key()】*/{P3=H[0];if(P3!=H[0]){Delay(1);if(P3==H[4]){set1++;if(set1>4) set1 = 1;er1: if(P3==H[4]) goto er1; /*按下键后未释放，在此等候*/ }Delay(1);if(P3==H[3]){set2++;if(set2>3) set2 = 1;er2: if(P3==H[3]) goto er2; /*按下键后未释放，在此等候*/ }Delay(1);if(P3==H[1]){BIN++;if(BIN>1) BIN=0;er3: if(P3==H[1]) goto er3; /*按下键后未释放，在此等候*/ }}}void Time_show() /*时间的显示变量为【时】【分】【秒】*/ {P0 = Code[hour/10]; /*第一位数字显示【时】的【十】位*/ P2 = C[1];Delay(1);P0 = Code[hour%10]; /*第二位数字显示【时】的【个】位*/P2 = C[2];Delay(1);if(x/50==0)P0 = 0x40; /*第三位符号【-】的显示*/elseP0 = 0x00;P2 = C[3];Delay(1);P0 = Code[min/10]; /*第四位的数字的显示【分】的【十】位*/P2 = C[4];Delay(1);P0 = Code[min%10]; /*第五位的数字显示【分】的【个】位*/P2 = C[5];Delay(1);Delay(1);if(x/50==0)P0 = 0x40; /*第六位符号【-】的显示*/elseP0 = 0x00;P2 = C[6];Delay(1);P0 = Code[sec/10]; /*第七位数字的显示【秒】的【十】位显示*/P2 = C[7];Delay(1);P0 = Code[sec%10]; /*第八位数字的显示【秒】的【个】位显示*/ P2 = C[8];Delay(1);}void Year_show(){P0 = Code[year/10]; /*第一位数字显示【年】的【十】位*/P2 = C[1];Delay(1);P0 = Code[year%10]; /*第二位数字显示【年】的【个】位*/P2 = C[2];Delay(1);P0 = 0x40; /*第三位符号【-】的显示*/P2 = C[3];Delay(1);P0 = Code[month/10]; /*第四位的数字的显示【月】的【十】位*/P2 = C[4];Delay(1);P0 = Code[month%10]; /*第五位的数字显示【月】的【个】位*/P2 = C[5];Delay(1);Delay(1);P0 = 0x40; /*第六位符号【-】的显示*/P2 = C[6];Delay(1);P0 = Code[day/10]; /*第七位数字的显示【天】的【十】位显示*/P2 = C[7];Delay(1);P0 = Code[day%10]; /*第八位数字的显示【天】的【个】位显示*/ P2 = C[8];Delay(1);}void Clock_show(){P0 = Code[shi/10]; /*第一位数字显示【时】的【十】位*/P2 = C[4];Delay(1);P0 = Code[shi%10]; /*第二位数字显示【时】的【个】位*/P2 = C[5];Delay(1);P0 = 0x40; /*第三位符号【-】的显示*/P2 = C[6];Delay(1);P0 = Code[fen/10]; /*第四位的数字的显示【分】的【十】位*/ P2 = C[7];Delay(1);P0 = Code[fen%10]; /*第五位的数字显示【分】的【个】位*/P2 = C[8];Delay(1);}void Miao_show() /*时间的显示变量为【时】【分】【秒】*/ {P0 = Code[Mmin/10]; /*第一位数字显示【时】的【十】位*/P2 = C[1];Delay(1);P0 = Code[Mmin%10]; /*第二位数字显示【时】的【个】位*/P2 = C[2];Delay(1);P0 = 0x40; /*第三位符号【-】的显示*/P2 = C[3];Delay(1);P0 = Code[Msec/10]; /*第四位的数字的显示【分】的【十】位*/ P2 = C[4];Delay(1);P0 = Code[Msec%10]; /*第五位的数字显示【分】的【个】位*/P2 = C[5];Delay(1);Delay(1);P0 = 0x40; /*第六位符号【-】的显示*/P2 = C[6];Delay(1);P0 = Code[M0/10]; /*第七位数字的显示【秒】的【十】位显示*/P2 = C[7];Delay(1);P0 = Code[M0%10]; /*第八位数字的显示【秒】的【个】位显示*/ P2 = C[8];Delay(1);}void Time_set() /*调整时间的函数time_set() */{Scan_key();if(set1==1){if(set2==1) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) hour++; /*按一下第三行的键hour 就加一*/Delay(1);if(hour>24) hour=0;while(P3==H[2]); /*按键未释放，在此等候*/}if(set2==2) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) min++; /*按一下第三行的键hour 就加一*/Delay(1);if(min>60){ min=0; hour++;}while(P3==H[2]); /*按键未释放，在此等候*/}}}void Year_set() /*调整时间的函数time_set() */{Scan_key();if(set1==2){if(set2==1) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) year++; /*按一下第三行的键hour 就加一*/ Delay(1);if(year>100) year=0;while(P3==H[2]);}if(set2==2) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) month++; /*按一下第三行的键hour 就加一*/ Delay(1);if(month>12){ month=0; year++;}while(P3==H[2]);}if(set2==3){if(P3==H[2]) day++; /*按一下第三行的键hour 就加一*/ Delay(1);if(day>MON[month]){ day=0; month++;}while(P3==H[2]); /*按键未释放，在此等候*/}}}Clock_set(){Scan_key();if(set1==3){if(set2==1) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) shi++; /*按一下第三行的键hour 就加一*/ Delay(1);if(shi>24) shi=0;while(P3==H[2]); /*按键未释放，在此等候*/}if(set2==2) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) fen++; /*按一下第三行的键hour 就加一*/ Delay(1);if(fen>60){ fen=0; shi++;}while(P3==H[2]); /*按键未释放，在此等候*/}}}void Miao_set() /*调整时间的函数time_set() */{Scan_key();if(set1==4){if(set2==1) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) Mmin++; /*按一下第三行的键hour 就加一*/ Delay(1);if(Mmin>24) Mmin=0;while(P3==H[2]); /*按键未释放，在此等候*/}if(set2==2) /*当set1=1 set2=1时位时的设置*/{if(P3==H[2]) Msec++; /*按一下第三行的键hour 就加一*/ Delay(1);if(Msec>60){ Msec=0; Mmin++;}while(P3==H[2]); /*按键未释放，在此等候*/ }}}void Clock(){if((hour==shi)&&(min==fen)){P1=0x00;}if(min>fen){P1=0xff;}}void Delay(uint k) /*延时函数delay() 的定义*/ {uint i,j;for(i = 0; i < k; i++){for(j = 0; j < 121; j++){;}}}void main() /*主函数*/{Timer0();while(1){if(set1==1){Time_show();Time_set();}if(set1==2){Year_show();Year_set();}if(set1==3){Clock_show();Clock_set();}Clock();if(set1==4){Miao_show();Miao_set();if(Mmin==0&&Msec==0){A=sec;P1=0x00;if(sec==A-1)P1=0xff;}}if(set1!=4){P1=0xff;}}}。