单片机原理及应用课程设计报告(13)

单片机原理及应用课程设计报告

{hour=23;}

if(hour<-1&&hour>-24){

hour=hour+20;}

if(hour<=-24){

hour=hour+40;}

keycode4=0;}}

if(keycode2==3){

keycode2=0;}}

void time(){

if(tcount>=20){

second++;tcount=0;}

if(second>=60){

minute++;second=0;}

if(minute>=60){hour++;minute=0;}

if(hour>=24){hour=0;}}

void alarm(void){

static unsigned int flag,tcountn,fh;

//30s闹钟

{fh++;if(fh==1){RD=0;

//正常计时

停

//30s闹钟,可通过按第4排第3个键

if(second==alarm_second&&minute==alarm_minute&&hour==alarm_hour){flag=1;}

if(keycode3==1){flag=0;RD=1;}

if(flag==1){

if(tcount02s>=4){RD=~RD;tcount02s=0;tcountn++;}

if(tcountn>=150){RD=1;}}

if(second==0&&minute==0)

//整点报时

delay();delay();delay();delay();delay();delay();delay();delay();delay();RD=1;}}

if(second!=0)fh=0;}//主程数void main(){

TMOD=0X21;

//T0方式

1