#include sbit key1=P3^0; sbit key2=P3^1; sbit key3=P3^2; sbit key4=P3^3; sbit key5=P3^7; sbit BEEP=P2^0; unsigned char temp; unsigned char pulse_number1=9; unsigned char code TAB[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f};
void delay_100ms(unsigned int t) { unsigned char i,j,k; for(i=t;i>0;i--) {
for(j=200;j>0;j--);
{
for(k=248;k>0;k--) ;
} } } void beep() {
BEEP=1;
delay_100ms(100);
BEEP=0;
}
void T0_int() interrupt 1
{
static unsigned char count; unsigned char a=1; count++;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256; if(count==20) {
count=0;
P0=TAB[pulse_number1--];
}
beep();
if(pulse_number1==0)
{
P0=TAB[0];
TR0=0;
while(a)
{ beep(); if(!key5)a=0;
}
}
}
void main() {
bit flag;
temp=0x00;
P2=temp;
P0=0x3f;
TMOD=0x01;
TH0=(65536-50000)/256; TL0=(65536-50000)%256; ET0=1; EA=1;
TR0=1;
while(!flag)
{
}
while(flag); }
if(!key1){P0=0x06;beep();flag=1;TR0=0;}
else if (!key2){P0=0x5b;beep();flag=1;TR0=0;} else if (!key3){P0=0X4f;beep();flag=1;TR0=0;} else if (!key4){P0=0x66;beep();flag=1;TR0=0;}
