缘由proteus流水灯-嵌入式-CSDN问答 仿真51单片机流水灯代码-编程语言-CSDN问答 protues仿真单片机控制led流水灯-嵌入式-CSDN问答

#include<reg52.h>//头文件
void main()         //主函数
{
    unsigned char y2=3;
    unsigned int ys=0;
    while(1)
    {
      if(!++ys)
      {
        P0=y2;
        if(!(y2*=4))y2=3;
      }
  }
}

#include<reg52.h>//头文件
void main()         //主函数
{
    unsigned char b=0;
	unsigned int ys=0;
	P0=255;
	while(1)
	{
		if(!++ys)
		{
			switch(++b)
			{
				case 1:P0 = ~0x03; break;
				case 2:P0 = ~0x0c; break;
				case 3:P0 = ~0x30; break;
				default: P0 = ~0xc0;break; 
			}
			if(b>3)b=0;
		}
	}
}

#include<reg52.h>//头文件
void main()         //主函数
{
    unsigned char y2=0x03;
    unsigned int ys=0x00;
    while(1)
    {
      if(!++ys)
      {
        P0=~y2;
        if(!(y2*=0x04))y2=0x03;
      }
  }
}