【Proteus仿真】51单片机+8255并行口扩展流水灯演示

【Proteus仿真】51单片机+8255并行口扩展流水灯演示

  • Proteus仿真
    在这里插入图片描述

程序实例代码

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#include<regx52.h>
#include<intrins.h>
#include<absacc.h>

#define uchar unsigned char
#define uint unsigned int
#define PA XBYTE[0x3fff]
#define PB XBYTE[0x7fff]
#define PC1 XBYTE[0xbfff]
#define CTL XBYTE[0xffff]

sbit reset=P2^5;

void delay(uchar t);
void display();

void main()
{
		 EA=1;
		 ET0=1;
		 TMOD=0x01;
		 reset=1;
		 \_nop\_();
		 reset=0;
		 CTL=0x80;     //写8255控制字，设置PA,PB,PC为输出口
	while(1)
 {
			display();
 }
}

void display()
{
 uchar outdata=0xfe,i;
 for(i=0;i<8;i++)
  {PA=outdata;
   delay(200);
   outdata=\_crol\_(outdata,1);
  }
  PA=0xff;
  outdata=0xfe;
 for(i=0;i<8;i++)
  {PB=outdata;
   delay(200);
   outdata=\_crol\_(outdata,1);}
  PB=0xff;
  outdata=0xfe;
 for(i=0;i<8;i++)
  {PC1=outdata;
   delay(200);
   outdata=\_crol\_(outdata,1);}
 
  PC1=0xff;
}

void delay(uchar t)
{
  for(;t>0;t--)
   {
   	 TH0=(65536-1000)/256;//定时1ms
		 TL0=(65536-1000)%256;
   	 TR0=1;
   	 while(TF0==0) ;
	 TF0=0;
    }
   TR0=0;
}

程序源码和仿真资源

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链接：https://pan.baidu.com/s/1-qbU3YjZ7oay5oMSanaoZQ 
提取码：spg5