AT89S52语言常用程序——单片机的数字时钟例程

#include <reg52.h>#include <absacc.h>#define unit unsigned int#define uchar unsigned char/*定义字型字位口*/#define DIGPORT  XBYTE [0x8000]#define WORDPORT  XBYTE [0x4000]/*定义P1口各管脚*/sbit K0=P1^0;sbit K1=P1^1;sbit K2=P1^2;sbit BEEP=P1^3;sbit L0=P1^4;sbit L1=P1^5;sbit L2=P1^6;sbit L3=P1^7;uchar data BUFFER[2]={0,0}; /*显示缓冲区(依次为低位,高位)*/uchar data CLOCK[4]={0,0,0,0};/*存放时钟时间(依次为百分秒,秒,分和时位)*/uchar data SECOND[2]={0,0};/*存放秒表时间(依次为百分秒,秒)*/uchar data REVERSE[4]={0,0,0,0};/*存放倒计时时间(依次为百分秒,秒,分和时位)*//*定义运行状态*/uchar data STATE=0;/*STATE=0,秒表*//*STATE=1,倒计时分调整*//*STATE=2,倒计时小时调整*//*STATE=3,倒计时运行*//*STATE=4 or 7,时钟运行*//*STATE=5,时钟分调整*//*STATE=6,时钟时调整*/bit bdata SND=0;/*秒表START*/bit bdata RST=0;/*秒表RESET*/bit bdata STP=0;/*倒计时STOP*//*数码管显示编码"0"－"9","A","-"*/uchar code TABLE[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x40};void display(void){uchar i; /*显示缓冲区首址*/uchar delay;/*显示延时*/uchar disp; /*显示内容*/uchar digit; /*定义数码管显示位*/digit=0x08;for (i=0;i<2;i++) /*秒表,显示百分秒和秒*/{if (BUFFER[i]>100) disp=BUFFER[i]%10+10;else disp=BUFFER[i]%10;DIGPORT=digit;WORDPORT=TABLE[disp];for (delay=0;delay<=200;delay++);digit=digit>>1;disp=BUFFER[i]/10;DIGPORT=digit;WORDPORT=TABLE[disp];for (delay=0;delay<=200;delay++);digit=digit>>1;}}void timer0(void)  interrupt 1 using 1{/*重置定时初值*/TH0=-5000/256;TL0=-5000%256;/*时钟处理*/CLOCK[0]=CLOCK[0]+1;if ((CLOCK[0]==50) && (STATE>=4)){L0=!L0;}if (CLOCK[0]==100){if (STATE>=4) L0=!L0;CLOCK[0]=0;CLOCK[1]=CLOCK[1]+1;if (CLOCK[1]==60) {CLOCK[1]=0;CLOCK[2]=CLOCK[2]+1;if (CLOCK[2]==60){CLOCK[2]=0;CLOCK[3]=CLOCK[3]+1;if (CLOCK[3]==24){CLOCK[3]=0;}}}}}void timer2(void) interrupt 5 using 3{TF2=0;TH2=-5000/256; TL2=-5000%256;/*秒表处理*/if (STATE==0){SECOND[0]=SECOND[0]+1;if (SECOND[0]==50){L1=!L1;}if (SECOND[0]==100){L1=!L1;SECOND[0]=0;SECOND[1]=SECOND[1]+1;if (SECOND[1]==100) {SECOND[1]=0; }}}/*倒计时处理*/if (STATE==3){REVERSE[0]=REVERSE[0]+1;if (REVERSE[0]==50){L2=!L2;}if (REVERSE[0]==100){L2=!L2;REVERSE[0]=0;REVERSE[1]=REVERSE[1]+1;if (REVERSE[1]==60) {REVERSE[1]=00;REVERSE[2]=REVERSE[2]-1;if ((REVERSE[2]==0) && (REVERSE[3]==0)) {TR2=0;STP=1;BEEP=0;}else if (REVERSE[2]==0xff){REVERSE[2]=59;REVERSE[3]=REVERSE[3]-1; }}}}}void intsvr1(void)  interrupt 2 using 2{if (STATE==5){CLOCK[2]=CLOCK[2]+1;if (CLOCK[2]==60) CLOCK[2]=0; }if (STATE==6){CLOCK[3]=CLOCK[3]+1;if (CLOCK[3]==24) CLOCK[3]=0; }}void timer1(void)  interrupt 3 using 3{if (STATE==0){if (RST){SECOND[0]=0;SECOND[1]=0;L1=1;RST=0;}else {if (SND) TR2=1;else  {L1=1;TR2=0;RST=1;}SND=!SND;}}else if (STATE==1){REVERSE[2]=REVERSE[2]+1;if (REVERSE[2]==60) REVERSE[2]=0; }else if (STATE==2){REVERSE[3]=REVERSE[3]+1;if (REVERSE[3]==24) REVERSE[3]=0;}else {if (STP) {BEEP=1;L2=1;STP=0;  }else TR2=0;}}void main(void){uchar stabak;/*上一次程序运行的状态*/P1=0x0f;EA=1; IT1=1; ET0=1;TMOD=0x61;/*T1方式2计数，T0方式1计时*/TH0=-5000/256; TL0=-5000%256;TH1=0xff; TL1=0xff;T2CON=0; TH2=-5000/256; TL2=-5000%256;K0=1; K1=1; K2=1;STATE=P1&0x07;stabak=STATE;for (;;){switch (STATE){case 0:/*STATE=0,秒表*/{EX1=0; ET1=1; ET2=1; TR1=1;  SND=1;L1=1; L0=0; L2=0;SECOND[0]=0;SECOND[1]=0;} break;case 1:/*STATE=1,倒计时分调整*/{EX1=0; ET1=1; ET2=1; TR1=1; TR2=0;L2=1; L0=0; L1=0;REVERSE[0]=0;REVERSE[1]=0;} break;case 2:/*STATE=2,倒计时小时调整*/{EX1=0; ET1=1; ET2=1; TR1=1; TR2=0;L2=1; L0=0; L1=0;REVERSE[0]=0;REVERSE[1]=0;} break;case 3:/*STATE=3,倒计时运行*/{EX1=0; ET1=1; ET2=1; TR1=1; if ((REVERSE[2]==0)&&(REVERSE[3]==0)) L2=1;else TR2=1;L0=0; L1=0;} break;case 5:/*STATE=5,时钟分调整*/{IE1=0; EX1=1; ET1=0; ET2=1; TR0=0; L0=1; L1=0; L2=0;} break;case 6:/*STATE=6,时钟时调整*/{IE1=0; EX1=1; ET1=0; ET2=1; TR0=0; L0=1; L1=0; L2=0;} break;default:/*STATE=4 or 7,时钟运行*/{EX1=0; ET1=0; ET2=1; TR0=1;L1=0; L2=0;}}while (STATE==stabak) {switch (STATE){case 0:/*STATE=0,秒表*/{BUFFER[0]=SECOND[0];BUFFER[1]=SECOND[1];} break;case 1:/*STATE=1,倒计时分调整*/{BUFFER[0]=REVERSE[2];BUFFER[1]=101;/*A-*/} break;case 2:/*STATE=2,倒计时小时调整*/{BUFFER[0]=110;/*-A*/BUFFER[1]=REVERSE[3];} break;case 3:/*STATE=3,倒计时运行*/{BUFFER[0]=REVERSE[2];BUFFER[1]=REVERSE[3];} break;case 5:/*STATE=5,时钟分调整*/{BUFFER[0]=CLOCK[2];BUFFER[1]=101;/*A-*/} break;case 6:/*STATE=6,时钟时调整*/{BUFFER[0]=110;/*-A*/BUFFER[1]=CLOCK[3];} break;default:/*STATE=4 or 7,时钟运行*/{BUFFER[0]=CLOCK[2];BUFFER[1]=CLOCK[3];}}display();K0=1; K1=1; K2=1;STATE=P1&0x07;}stabak=STATE;}}