51单片机小闹钟

if(hour_key==0) //时按键
{

delay(10);
if(hour_key==0)
{
while(!hour_key)display(hour1,minu1,sec1); //消除数码管的抖动

if(mode_number%2==0)//如果在时钟模式下，时钟时+1
hour1++;
else hour0++;//如果在闹钟模式下，闹钟时+1

if(hour1==12)
{
hour1=0;
}

if(hour0==12)
{
hour0=0;
}

}
}

if(minu_key==0) //分按键
{

delay(10);
if(minu_key==0)
{
while(!minu_key)display(hour1,minu1,sec1); //消除数码管的抖动
if(mode_number%2==0)
minu1++;
else
minu0++;

if(minu1==60)
{
minu1=0;
}

if(minu0==60)
{
minu0=0;
}

}

}

if(mode_key==0) //模式按键

{

delay(10);
if(mode_key==0)
{

while(!mode_key)display(hour1,minu1,sec1); //数码管的抖动

mode_number++;


}

}

if(stopsounder_key==0) //关闹钟按键
{
sounder_flag=1;
delay(10);
if(stopsounder_key==0)
{

while(!stopsounder_key)display(hour1,minu1,sec1);

beep=1;
}

}

}

void display(uchar hour,uchar minu,uchar sec)
{
h1=hour/10;
h2=hour;

m1=minu/10;
m2=minu;

s1=sec/10;
s2=sec;

P2=0xff;
P1=table[h1];
P2=select[0];
delay(5);

P2=0xff;
P1=table[h2];
P2=select[1];
delay(5);

P2=0xff;
P1=0x40;;
P2=select[2];
delay(5);

P2=0xff;
P1=table[m1];
P2=select[3];
delay(5);

P2=0xff;
P1=table[m2];
P2=select[4];
delay(5);

P2=0xff;
P1=0x40;
P2=select[5];
delay(5);

P2=0xff;
P1=table[s1];
P2=select[6];
delay(5);

P2=0xff;
P1=table[s2];
P2=select[7];
delay(5);

}

void timer1_int() interrupt 3 //控制时钟工作 50ms
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%6;
b++;
if(b==10)led=~led;
if(b==20)
{
led=~led;
b=0;
sec1++;
if(sec1==60)
{

sounder_flag=0; //每隔一分钟，释放检测闹钟

sec1=0;
minu1++;
if(minu1==60)
{
minu1=0;
hour1++;
if(hour1==24)
hour1=0;

}
}

}

}

void main()
{
init();


for(;;)
{

keyscan(); //按键扫描


if(mode_number%2==0) //正常时钟显示
{

display(hour1,minu1,sec1);
}

else
{


display(hour0,minu0,sec0); //设定时间显示

delay(100);

}




if(hour0==hour1&&minu0==minu1) //如果设定的时间到
{
if(!sounder_flag) //且按键按下一分钟之后
{
beep=0;//闹铃开


}

}



}

}