#include <reg51.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar aa;
void delay(uint i)
{
uint j,k;
for(j=i;j>0;j--)
for(k=110;k>0;k--);
}
void main()
{
aa=0xfe;
P1=aa;
delay(1000);
while(1)
{
aa=_crol_(aa,1);
P1=aa;
delay(1000);
}
} |