#include <reg52.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
void delay(uint z);
void init(void)
{
EA=1;
EX0=1;
IT0=1;//下降沿
}
uchar temp;
void main()
{
init();
temp=0xfe;
while(1)
{
P1=temp;
delay(500);
}
}
void int_0(void)interrupt 0
{
temp=_crol_(temp,1);
}
void delay(unsigned int z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
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