4-4.c

这是HOLTEK HT 48系列单片机应用实例

//Seven segment display,Common cathode number 0~9
unsigned char _pac @ 0x13;
unsigned char _pa  @ 0x12;

#define _pa7   _12_7
const unsigned char pattern[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay(){unsigned long i;  for(i=0;i<5000;i++);}
void main()
{ 
  while(1)
  {
   unsigned int j;
   _pac = 0x00;
   j=0;
   while(1)
   { _pa = pattern[j];  
     delay(); 
     j++;
     if(j>=10)j=0;
   }
 }
}