#include<reg52.h>
#include<intrins.h>
unsigned char temp,aa;
void main()
{
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
temp=0xfe;
while(1)
{
if(aa==20)
{
aa = 1;
P1=temp;
temp=_crol_(temp,1);
}
}
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
} |
