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#include<reg51.h>//51單片機(jī)頭文件
typedef unsigned char uchar;
typedef unsigned int uint;
sbit K1=P3^2;//比賽倒計(jì)時(shí)開始/暫停
sbit K2=P3^3;//24s倒計(jì)時(shí)重新開始
sbit P20=P2^0;//乙隊(duì)+1按鍵
sbit P21=P2^1;//乙隊(duì)+2按鍵
sbit P22=P2^2;//甲隊(duì)+1按鍵
sbit P23=P2^3;//甲隊(duì)+2按鍵
sbit P24=P2^4;//甲隊(duì)+3按鍵
sbit P25=P2^5;//乙隊(duì)+3按鍵
sbit P26=P2^6;//預(yù)留按鍵
sbit P27=P2^7;
sbit beep=P3^6;//蜂鳴器接口
sbit RS=P1^0;
sbit RW=P1^1;
sbit E=P1^2;
char second,minute,num,time,aa;
uchar dd,bb,cc;
uchar code table1[]={"H.T 000:000 T.H "};
uchar code table2[]={"12:00 SEC-1 24"};
//延時(shí)子函數(shù)
void delay(uint z)
{
uint x;
uchar y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
//LCD1602液晶寫指令子函數(shù)
void write_com(uchar com)
{
RW=0;
RS=0;
P0=com;
delay(5);
E=1;
delay(5);
E=0;
}
//LCD1602液晶寫數(shù)據(jù)子函數(shù)
void write_date(uchar date)
{
RW=0;
RS=1;
P0=date;
delay(5);
E=1;
delay(5);
E=0;
}
//LCD1602液晶初始化子函數(shù)
void LCD1602_init()
{
uchar i;
bb=0; //H.T分?jǐn)?shù)初始化
cc=0; //T.H分?jǐn)?shù)初始化
time=0;
TMOD=0x10; //定時(shí)器1初始化
TL1=0x00;
TH1=0x4c;
EA=1; //開總中斷
ET1=1; //開定時(shí)器1
TR1=0; //開中斷0
EX1=1; //開中斷1
IT0=1; //中斷0為邊沿觸發(fā)
IT1=1; //中斷1為邊沿觸發(fā)
E=0;
beep=0;
second=0;
minute=12;
num=1;
aa=24;
write_com(0x38); //LCD設(shè)置初始化
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80); //LCD顯示初始化
for(i=0;i<16;i++)
{
write_date(table1[i]);
}
write_com(0x80+0x40);
for(i=0;i<16;i++)
{
write_date(table2[i]);
}
}
//分?jǐn)?shù)更新子函數(shù)
void point_lcd(uchar add,uchar dat)
{
write_com(0x80+add);
write_date(0x30+dat/100);
write_date(0x30+(dat%100)/10);
write_date(0x30+dat%10);
write_com(0x80+add);
}
//按鍵掃描子函數(shù)
void keyscan()
{
P2=0xf0;
if((P2&0xf0)!=0xf0)
{
delay(20);
}
if((P2&0xf0)!=0xf0)
{
P2=0xf7;
if(P24==0)
{
while(P24==0); //P24按下H.T分?jǐn)?shù)加1
bb++;
point_lcd(0x04,bb);
if(P24==0)
{
while(P24==0);
delay(20);
}
}
else if(P25==0) //P25按下H.T分?jǐn)?shù)加2
{
while(P25==0);
bb=bb+2;
point_lcd(0x04,bb);
if(P25==0)
{
while(P25==0);
delay(20);
}
}
else if(P26==0) //P26按下H.T分?jǐn)?shù)加3
{
while(P26==0);
bb=bb+3;
point_lcd(0x04,bb);
if(P26==0)
{
while(P26==0);
delay(20);
}
else if(P27==0) //P27按下T.H分?jǐn)?shù)加一
{
while(P27==0);
cc++;
point_lcd(0x08,cc);
if(P27==0)
while(P27==0);
delay(20);
}
}
P2=0xfb;
if(P24==0) //P24按下T.H分?jǐn)?shù)加2
{
while(P24==0);
cc=cc+2;
point_lcd(0x08,cc);
if(P24==0)
{
while(P24==0);
delay(20);
}
}
else if(P25==0) //P25按下T.H分?jǐn)?shù)加3
{
while(P25==0);
cc=cc+3;
point_lcd(0x08,cc);
if(P25==0)
{
while(P25==0);
delay(20);
}
}
else if(P26==0) //P26按下交換比分
{
while(P26==0);
dd=bb;
bb=cc;
cc=dd;
point_lcd(0x08,cc);
point_lcd(0x04,bb);
if(P26==0)
{
while(P26==0);
delay(20);
}
}
}
//比賽倒計(jì)時(shí)/24s倒計(jì)時(shí)
void counter_down()
{
uchar i;
if(time>=20) //每1s倒計(jì)時(shí)做減一操作
{
second--;
aa--;
write_com(0x80+0x4e); //24s倒計(jì)時(shí)顯示
write_date(0x30+aa/10);
write_date(0x30+aa%10);
write_com(0x80+0x4e);
beep=1;
if(aa==0) //24s結(jié)束發(fā)出連續(xù)報(bào)警
{
beep=0;
delay(3000);
beep=1;
aa=24;
}
if((second==0)&&(minute==0)) //檢測一節(jié)比賽是否結(jié)束
{
TR1=0; //定時(shí)器1暫停
write_com(0x80+0x44);
write_date(0x30);
num++;
aa=24; //24s計(jì)時(shí)復(fù)位
write_com(0x80+0x4e); //24s倒計(jì)時(shí)顯示
write_date(0x30+aa/10);
write_date(0x30+aa%10);
write_com(0x80+0x4e);
if(num<5) //每節(jié)結(jié)束蜂鳴器發(fā)出間斷報(bào)警
{
for(i=80;i>0;i--)
{
beep=0;
delay(500);
beep=1;
delay(500);
}
}
if(num==5) //終場結(jié)束，蜂鳴器發(fā)出連續(xù)警報(bào)聲
{
beep=0;
delay(10000);
num=0;
}
beep=1; //蜂鳴器關(guān)閉
write_com(0x80+0x4b); //更新"SEC-?"
write_date(0x30+num);
write_com(0x80+0x4b);
second=0; //倒計(jì)時(shí)復(fù)位
minute=12;
}
if(second==-1)
{
second=59;
minute--;
}
write_com(0x80+0x40); //更新倒計(jì)時(shí)顯示
write_date(0x30+minute/10);
write_date(0x30+minute%10);
write_com(0x80+0x43);
write_date(0x30+second/10);
write_date(0x30+second%10);
write_com(0x80+0x43);
time=0;
}
}

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