shumaguan.c

52单片机开发板的实例程序

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char 
sbit a=P1^0;
sbit b=P1^1;
sbit c=P1^2;
/******************************
共阴数码管0——15译码表
****************************************/
uchar table[]={
          0x3f,0x06,0x5b,0x4f,0x66,
          0x6d,0x7d,0x07,0x7f,0x6f,
          0x77,0x7c,0x39,
          0x5e,0x79,0x71};
void delay(uint j)
{
	uchar i;
	for(;j>0;j--)
	for(i=110;i>0;i--);
}
void HC138(uchar i)
{
	a=i&0x01;
	b=i&0x02;
	c=i&0x04;
}
void main()
{
   uchar i,j,k;
   while(1)
   {
    for(k=0;k<16;k++)
    {
      for(i=0;i<200;i++)
       {
	   for(j=0;j<8;j++)
	     {
	     	P2=table[k]; 
		    HC138(j);
	    	delay(1);
	     }

       }
   }
  }
}