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标题: 用数码管显示一个流水灯 [打印本页]

作者: バ幸福De右岸 时间: 2016-9-27 10:56
标题: 用数码管显示一个流水灯

/*数码管动态显示,延时0.5s数码管1到8显示一个口形流水灯，跑4圈，停下显示口，如此循环。
程序在实验板上通过。
*/

#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
uint aa;
uchar z;

void delayms(uint xms)
{
      uint i;
      uchar j;
      for(i=xms;i>0;i--)
      for(j=110;j>0;j--);
}

void main()
{
while(1)
      {

      for(z=0;z<4;z++)
      {
      dula=1;             //1
      P0=0x01;                //送段选数据
      dula=0;
      P0=0xff;                      //送位选数据前关闭所有显示，防止打开位选锁存器时
      wela=1;                      //原来段选数据通过位选锁存器造成混乱
      P0=0xfe;                      //送位选数据
      wela=0;
      delayms(500);                //延时

      dula=1;             //2
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfd;
      wela=0;
      delayms(500);

      dula=1;             //3
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfb;
      wela=0;
      delayms(500);

      dula=1;             //4
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xf7;
      wela=0;
      delayms(500);

      dula=1;                //5
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xef;
      wela=0;
      delayms(500);

      dula=1;                //6
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xdf;
      wela=0;
      delayms(500);

      dula=1;                //7
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xbf;
      wela=0;
      delayms(500);

      dula=1;                //8
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(500);

      dula=1;
      P0=0x02;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(500);

      dula=1;
      P0=0x04;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(500);

      dula=1;
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(500);

      dula=1;             //7
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xbf;
      wela=0;
      delayms(500);

      dula=1;                //6
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xdf;
      wela=0;
      delayms(500);

      dula=1;                //5
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xef;
      wela=0;
      delayms(500);

      dula=1;             //4
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xf7;
      wela=0;
      delayms(500);

      dula=1;             //3
      P0=0x8;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfb;
      wela=0;
      delayms(500);

      dula=1;             //2
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfd;
      wela=0;
      delayms(500);

      dula=1;             //1
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(500);

      dula=1;             //1
      P0=0x10;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(500);

      dula=1;             //1
      P0=0x20;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(500);
      }


      for(aa=0;aa<200;aa++)
      {
      dula=1;             //1
      P0=0x01;                //送段选数据
      dula=0;
      P0=0xff;                      //送位选数据前关闭所有显示，防止打开位选锁存器时
      wela=1;                      //原来段选数据通过位选锁存器造成混乱
      P0=0xfe;                      //送位选数据
      wela=0;
      delayms(5);                //延时

      dula=1;             //2
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfd;
      wela=0;
      delayms(5);

      dula=1;             //3
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfb;
      wela=0;
      delayms(5);

      dula=1;             //4
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xf7;
      wela=0;
      delayms(5);

      dula=1;                //5
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xef;
      wela=0;
      delayms(5);

      dula=1;                //6
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xdf;
      wela=0;
      delayms(5);

      dula=1;                //7
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xbf;
      wela=0;
      delayms(5);

      dula=1;                //8
      P0=0x01;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(5);

      dula=1;
      P0=0x02;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(5);

      dula=1;
      P0=0x04;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(5);

      dula=1;
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0x7f;
      wela=0;
      delayms(5);

      dula=1;             //7
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xbf;
      wela=0;
      delayms(5);

      dula=1;                //6
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xdf;
      wela=0;
      delayms(5);

      dula=1;                //5
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xef;
      wela=0;
      delayms(5);

      dula=1;             //4
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xf7;
      wela=0;
      delayms(5);

      dula=1;             //3
      P0=0x8;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfb;
      wela=0;
      delayms(5);

      dula=1;             //2
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfd;
      wela=0;
      delayms(5);

      dula=1;             //1
      P0=0x08;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(5);

      dula=1;             //1
      P0=0x10;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(5);

      dula=1;             //1
      P0=0x20;
      dula=0;
      P0=0xff;
      wela=1;
      P0=0xfe;
      wela=0;
      delayms(5);
      }
      }
}

数码管