main.c

该程序为自己亲自设计

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int

#include "delay.h"

sbit m1=P0^0;
sbit m2=P0^1;
sbit m3=P0^2;
sbit m4=P0^3;

main()
{
  m1=1;
  m2=1;
  m3=1;
  m4=1;
  while(1)
  {
   m1=1;   //a
   m2=0;
   m3=1;   
   m4=1;
   dly_ms(2000);
   m1=1;   //b
   m2=1;
   m3=1;
   m4=0;
   dly_ms(2000);
   m1=0;   //-a
   m2=1;
   m3=1;
   m4=1;
   dly_ms(2000);
   m1=1;   //-b
   m2=1;
   m3=0;
   m4=1;
   dly_ms(2000);
  }
}