#include <reg52.h>
#include <intrins.h>
#define led P2
#define uint unsigned int
#define uchar unsigned char
#define k1 P3^0
uint x=0;
void delay(uint m)
{
uint i,j;
for(i=m;i>0;i--)
for(j=110;j>0;j--);
}
void dy()
{
uint i;
led=0xfe;
delay(500);
while(1)
{
for(i=0;i<7;i++)
{
if(k1==0)
{
delay(10);
{
if(k1==0);
x=~x;
while(!k1);
}
}
switch(x)
{
case 0:led=_crol_(led,1);break;
case 1:led=_cror_(led,1);break;
}
delay(500);
}
}
}
void main()
{
dy();
}
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