#include<reg51.h>
sbit DIO=P1^2;
sbit CLK=P1^1;
sbit STB=P1^0;
#define DIG0 0xc0
#define DIG1 0xc2
#define DIG2 0xc4 
#define DIG3 0xc6
#define DIG4 0xc8
#define DIG5 0xca
#define DIG6 0xcc
#define DIG7 0xce
#define LEVEL_OFF   0x80
#define LEVEL_1     0x88
#define LEVEL_2     0x89
#define LEVEL_4     0x8a
#define LEVEL_10    0x8b
#define LEVEL_11    0x8c
#define LEVEL_12    0x8d
#define LEVEL_13    0x8e
#define LEVEL_14    0x8f
#define MD_WRITE        0x40
#define MD_AUTO         MD_WRITE
#define MD_NORMAL       MD_WRITE
#define MD_READKEY      0x42
#define MD_FIX          0x44
#define MD_TEST         0x48
typedef unsigned char uint8;
typedef unsigned int  uint16;
uint16 key;
code uint8 shuzu[17] ={ 0x3F,0x06,0x5B,0x4F,   
      0x66,0x6D,0x7D,0x07,
      0x7F,0x6F,0x77,0x7c,
      0x39,0x5e,0x79,0x71,
      0x00,     
      
      };   
void xianshi(uint8 x,uint8 led,uint8 level);
void shizhong();
void chushi();
void ClearAll();
void KeyRead(uint16 *key);
void indate(unsigned char input)
{
unsigned int i;

STB=0;               
                      
for(i=0;i<8;i++) {
    CLK=0;            
    if((input & 0x01)!=0)
      DIO=1;          
    else
      DIO=0;          
    CLK=1;            
    input=input>>1;   
}                   
}
unsigned char outdate()
{
unsigned char i,out=0;   
DIO= 1;
STB=0;                                     
for(i=0;i<8;i++) {
    CLK=0;               
    out=out>>1;
    if(DIO == 0)
        out=out & 0x7f;  
    else                 
        out=out | 0x80;
    CLK=1;              
}
return(out);          
}
 
void chushi()
{
CLK     = 1;
STB     = 1;
DIO     = 1;
}
 void jishi()
{     
 TMOD |= 0x10;
 TMOD &= 0xdf;
 TH1=0xb8;
 TL1=0x00;
 TR1=1;
 EA=1;
    ET1 = 1;
}
  void ql()
  {
     xianshi(7,0,LEVEL_11);
         xianshi(6,0,LEVEL_11);
  
   xianshi(4,0,LEVEL_11);
   xianshi(3,0,LEVEL_11);
        
   xianshi(1,0,LEVEL_11);
   xianshi(0,0,LEVEL_11);
   
  }
 
 void xianshi(uint8 x,uint8 led,uint8 level)
{
 uint8 i;
 static uint8 cled[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,};
  for(i = 0 ;i < 8;i ++ ){
 if((shuzu[led]>>i)&0x01)
  cled[i] |= (0x01<< x);
  else
  cled[i] &= ~(0x01<< x);
 }
 DIO=1;
 CLK=1;
 STB=1;                     
 indate(MD_WRITE);
 STB = 1;
 indate(DIG0);
 for( i = 0 ; i<16; i+= 2){
  indate(cled[i/2] & 0x0f);      
  indate(cled[i/2] >> 4 & 0x0f);
 }
 STB=1;                     
 indate(level);
 STB=1;
}

void ClearAll()
{
unsigned int i;           
DIO=1;
CLK=1;
STB=1;                     
indate(MD_AUTO);          
STB=1;                    
indate(DIG0);              
for(i=0;i<16;i++)         
      indate(0);             
     
STB=1;                     
indate(0x80);              
STB=1;                     
}
void KeyRead(uint16 *key)
{
unsigned char key1,key2;
STB=1;
indate(MD_READKEY);           
key1 = outdate();
key2 = outdate();
*key = key1 | (key2 << 8);
STB=1;
 
}       
 void delay()
 {  uint16 n;
     uint8 k;
  for(k=0;k<10;k++)
  {
 
  for(n=0;n<6000;n++)
 ;
 }
 }

void zhongduan()interrupt 3
{
shizhong();
}
void shizhong()
{
 static uint16 count=0;
 static uint16 scount=0;
 static uint8  a=0;
 static uint8  b=0;
 static uint8  c=0;
 static uint8  d=0; 
 static uint8  x=0;
 static uint8  y=0;
 TH1=0xb8;
 TL1=0x00;
 count++;
 if(count==5)
 {
     count=0;
  scount++;
x=scount/10%10;
y=scount/100%10; 
 
xianshi(7,x,LEVEL_11);
if(scount%600==0)
{
xianshi(6,0,LEVEL_11);scount=0;a++;
}
else xianshi(6,y,LEVEL_11);
if(a>=10)
{
a=0;b++;
}
xianshi(4,a,LEVEL_11);
if(b>=6)
{
b=0;c++;
}
xianshi(3,b,LEVEL_11);
if(d<2){
if(c==10){
c=0;d++;}
xianshi(1,c,LEVEL_11);
xianshi(0,d,LEVEL_11);}
else if(d>=2){if(d>2)d=0;
if(c==4){
c=0;d=0;}
xianshi(1,c,LEVEL_11);
xianshi(0,d,LEVEL_11);}
 
KeyRead(&key);
if(key==0x0008)a++;
KeyRead(&key);
if(key==0x0080)b++;
KeyRead(&key);
if(key==0x0800)c++;
KeyRead(&key);
if(key==0x8000)d++;
if(key==0x0004){scount=0;
x=0;y=0;}

 
}}
 
 
 
    
 
main()
{
  ql();
  jishi();
     while(1){};  

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