Description: #include <reg51.h>
#define LED P1 //宏定义,使用LED代替P1口(相当于LED=P1)
#define uchar unsigned char //用uchar代替unsigned char方便操作
#define uint unsigned int
/*------------------time ms延时函数-----------------*/
void delay_ms(uint time)
{
uchar tres
for( time>0 time--)
{
tres=150
while(tres--)
}
}
void main()
{
uchar t
LED=0X01 //P1=00000001B
while(1)//死循环,不停的点亮和熄灭LED
{
for(t=0 t<8 t++)
{
LED=~LED //按位取反,点亮一个LED
delay_ms(100) //延时0.1s
LED=~LED //按位取反
LED<<=1 //左移一位,点亮不同的LED
}
LED=0X80 //P1=10000000B
for(t=0 t<8 t++)
{
LED=~LED //按位取反,点亮一个LED
delay_ms(100) //延时0.1s
LED=~LED //按位取反
LED>>=1 //右移一位,点亮不同的LED
}
LED=0X01 //P1=00000001B
}
}
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