一、程序

#include <REGX51.H>

#define uchar unsigned char

#define uint unsigned int

void delay(uint ms);

void main(void)

{

int k=0;

while(1)

{

for(k=0;k<15;k++)

{

P1=0xfe;

delay(500);

P1=0xfc;

delay(500);

P1=0xf8;

  delay(500);

}

for(k=0;k<10;k++)

{

P1=0xf0;

delay(500);

P1=0xe0;

delay(500);

P1=0xc0;

delay(500);

}

for(k=0;k<13;k++)

{

P1=0x80;

delay(500);

P1=0x00;

delay(500);

}

}

}

void delay(uint ms)

{

uchar i;

uint j;

for(j=0;j<ms;j++)

for(i=0;i<125;i++)

;

}