main_ex4.c

最近开发的51单片机多功能 实验板

#include <REGX51.H>
#define uchar unsigned char

extern void delay(unsigned int i );  // 延迟子程序

ex4()
{
uchar code dispcode[]=
    	{ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
     //字形 0   1    2    3    4    5    6    7    8   9 
          0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf,0xff};
    //字形 A   B    C   D    E    F    	-    
uchar code dispbitcode[]= 
	{0x01,0x02,0x04,0x08,0x10};  
	// 字位码		
uchar n,m;
  n=0;m=0;
  while(1)
  {
    P0 = 0x00;
	P2 = 0x00;
	delay(1000);
    P0 = dispcode[n];
	P2 = dispbitcode[m];
	delay(1000);
	if (n<17) n++;
	else n=0;
	if (m<3) m++;
	else m=0;
  }	    
}