程序5.cpp.c

分别按照不同的方式动态显示 数字,适用于AT89S52单片机,LED为8位共阴

#include <reg52.h>
#include <intrins.h>
#define hi 0x3c
#define lo 0xb0
#define uchar unsigned char
#define uint unsigned int
sbit P20=P2^0;sbit P21=P2^1;sbit P22=P2^2;
sbit P24=P2^4;sbit P25=P2^5;sbit P26=P2^6;sbit P27=P2^7;
unsigned char code ledk[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6D,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
sbit P37=P3^7;sbit P10=P1^0;
sbit clk=P0^7;sbit sda=P0^6;          
unsigned char key,mask=0xee,set_no=0,key_flag,key_count,set_flag=0,t0_count;
char disp[4]={0,0,0,0};


//=============================
void delay (unsigned int n)
{unsigned int i,j;
 for(i=0;i<n;i++)
   for(j=0;j<n ;j++);   }
void shift(dd)
  {unsigned char j=0;
	while(j<8){if((dd&0x80)!=0)sda=1;else sda=0;
				   clk=0; clk=1; dd<<=1;j++;}	}
//---------disp-----------
void display( )
{uchar i;
 for(i=0;i<=7;i++)
 {if(i>3)shift(ledk[16]);
    else {if(set_flag==1 && t0_count<7 && i==set_no)shift(ledk[16]);
	                       else shift(ledk[disp[i]]);}
  P20=i&0x04;P21=i&0x02;P22=i&0x01;
   delay(15); }
} 
 
//-------key
unsigned char get_char(void)
{unsigned char	key_code;
  static unsigned char column=0;
  if (P37==0 && key_flag==1){key_code=column;key_flag=0;key_count=0;}
      else key_code=0xff;
  mask=_crol_(mask,1);
  P24=mask&0x10;P25=mask&0x20;P26=mask&0x40;P27=mask&0x80;
  column++;
  if(column>3)column=0; 
  return(key_code);}
void key_func(key)
 {switch (key)
   {case 0:  set_flag=1;set_no++;if(set_no>3)set_no=0;break;
    case 1:  if(set_flag==1)disp[set_no]++;
	         if (disp[set_no]>9)disp[set_no]=0;
	         break;
    case 2:  if(set_flag==1)disp[set_no]--;
             if (disp[set_no]<0)disp[set_no]=9;
             break;
    case 3:  set_flag=0;break;
    default: break;               }  }
void t0() interrupt 1 
 {TH0=hi;TL0=lo;key_count++;t0_count++;
   if(t0_count==20)t0_count=0; 
   if(key_count>10)key_count=10; }
//---------
void main(void)
 {TMOD=0x11;TH0=hi;TL0=lo;EA=1;ET0=1;TR0=1;
   P10=0;
   while(1)
     {key=get_char( );key_func(key);
     display(); 
     if(key_flag==0 && key_count>=10)key_flag=1;
	 }		   
 }