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;
uchar table[]={
          0x3f,0x06,0x5b,0x4f,0x66,
          0x6d,0x7d,0x07,0x7f,0x6f,
          0x77,0x7c,0x39,
          0x5e,0x79,0x71};
void delay(uint k)
{
  uint i;
  for(;k>0;k--)
  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<100;i++)
     for(j=0;j<8;j++)
     {
       P2=table[k]; 
       HC138(j);
       delay(1);
     }
    }
   }
}