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| #include<reg51.h>
#define uchar unsigned char
#define uint insigned int
uchar code LED[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};//共阴数码管断码
uchar Buffer[]={0x3F,0x3F};
sbit CLAER=P3^1;
sbit BUZZ=P3^0;//喇叭
uchar key\_scan();
void key\_count(uchar num);
void disp();
void delay(uchar s);
void buzz\_on();
void main()
{
uchar temp;
while(1)
{
disp();
temp=key\_scan();
if(temp!=0xFF)
{
key\_count(temp+1);
while(CLAER==1)
{
buzz\_on();
disp( );
}
Buffer[0]=0x3F;
Buffer[1]=0x3F;
BUZZ=1;
}
}
}
void disp()
{
uchar i,w;
w=0x01;
for(i=0;i<2;i++)
{
P2=~w;
w<<=1;
P0=Buffer[i];
delay(10);
P2=0xFF;
}
}
uchar key\_scan(void)
{//按键扫描
uchar key=0xFF,cord_h,cord_1;
P1=0x0F;
cord_h=P1&0x0F;
if(cord_h!=0x0F)
{
delay(10);
if(cord_h!=0x0F)
{
cord_h=P1&0x0F;
P1=0xF0;
cord_1=P1&0xF0;
while((P1&0xF0)!=0xF0);
switch(cord_h+cord_1)
{
case 0xEE:key=0;break;//S1
case 0xED:key=1;break;//S2
case 0xEB:key=2;break;//S3
case 0xE7:key=3;break;//S4
case 0xDE:key=4;break;//S5
case 0xDD:key=5;break;//S6
case 0xDB:key=6;break;//S7
case 0xD7:key=7;break;//S8
case 0xBE:key=8;break;//S9
case 0xBD:key=9;break;//S10
case 0xBB:key=10;break;//S11
case 0xB7:key=11;break;//S12
case 0x7E:key=12;break;//S13
case 0x7D:key=13;break;//S14
case 0x7B:key=14;break;//S15
case 0x77:key=15;break;//S16
default: key=0xFF;break;
}
}
}
return(key);
}
void key\_count(uchar num)
{
Buffer[0]=LED[num/10];
Buffer[1]=LED[num%10];
}
void buzz\_on()
{
BUZZ=0;
delay(1);
BUZZ=1;
delay(1);
}
void delay(uchar s)
{
int j;
while(s--)
for(j=0;j<20;j++);
}
|
