|
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar temp;
sbit beep=P1^2;
void delay(uint);
void main()
{
temp=0xfe;
P1=temp;
while(1)
{
temp=_crol_(temp,1);
beep=0;
delay(120);
P1=0xff;
beep=1;
delay(120);
P1=temp;
}
}
void delay(uint z)
{
uint x,y;
for(x=100;x>0;x--)
for(y=z;y>0;y--);
} | 
