電子制作 DIY

程式如下 是用sdcc 寫的,不過有一些註解說明,因為是linux的小筆電,所以有亂碼還有不易對齊
真不知有沒有好方法可以克服這種情形 
//	FILE:key18.c 
// SDCC
// AUTHOR:     Naga  
// CREATED:    2009.5.06 
// PURPOSE:    timer1&timer2      
#include "8052.h"    
// io port Description 
#define _ONE    P2_4 
#define _TWO    P2_5 
#define _THREE  P2_6 
#define _FOUR   P2_7 
#define BIBI       P2_0 
#define BARUBO  P1_6 
#define KEY0    P1_4 
#define KEY1    P1_5  
const _7_seg[12]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xD8,0x80,0x98,0xff,0xBF}; 
int time_cnt,sec_cnt; 
unsigned char _1_sec_cnt=0x28 ; 
//�@�� �p�� 
unsigned char  scan_cnt=0X00;  
 //��ܱ��˪���ƫ�� 
unsigned char  key_cnt0=0x00,key_cnt1=0x00,key_cnt2=0x00; 
unsigned char  key_cnt0_0=0x00,key_cnt1_1=0x00,key_cnt2_2=0x00; 
unsigned char disp_0,disp_1,disp_2,disp_3 ; 
 // ---------------------------------------------- 
void LCD_L_Delay(int WAIT_LOOP) 
{ 	int		L_Loop ;  	
          for 	( L_Loop = 0 ; L_Loop < WAIT_LOOP ; L_Loop ++ ) 	
                 	  {}
 }  
//------------------------------------------------- 
void Init_IRQ()
 {   
// ET0     =   0x01; //Enable Timer Interrupt 0    
   ET1     =   0x01; //Enable Timer Interrupt 1    
   ET2     =   0x01; //Enable Timer Interrupt 2     
  TMOD    =  0X10 ;    
  TH1     =  0X3C ;              
  TL1     =  0XB0 ;      
  T2CON   =  0X00 ;     
  RCAP2H  =  0XFA ;                    
  RCAP2L  =  0X00 ;                         
  EA      =  0x01 ; //Enable All Interrupt                       
  TR1     =  0X01 ; //START TIMER1   
  T2CON  |=  0X04 ; //START TIMER2    
 }  
void Timer_Interrupt_1() interrupt 3 
{       _1_sec_cnt -- ; 	   
 if (_1_sec_cnt==0)     // �p��1�� 	  
   { time_cnt ++   ;     	  
      _1_sec_cnt=0x28 ;}     	     
 if (time_cnt>=60) 	    //�C60��i�@     
	 {sec_cnt+=1;        
           time_cnt=0; }             
   //   BIBI = !BIBI ;    
  TH1    =  0X3C ;       
   TL1    =  0XB0 ;   
 }   
void Timer_Interrupt_2() interrupt 5
 { 
 	 T2CON &=  0X7F;    //CLEAR TIMER2 INT_FLAG   
            //  BIBI = !BIBI ;     
         if (scan_cnt>3) scan_cnt=0x00;  
  // �� switch �N�i�������ҭn��檺����,�B��槹,���Wbreak��X      
  switch(scan_cnt)   
     {
       case 0:                
                 P0=0XFF;                   
                 _ONE=0x00; 		            
                 _TWO=0x01; 		              
                 _THREE=0X01;                  
                 _FOUR=0X01;  	             
                  P0= _7_seg[disp_0] ;  		
                  scan_cnt ++ ;                
                   break;         
        case 1:                 
                  P0=0XFF;             
                  _ONE=0x01;        
                  _TWO=0x00;   
                  _THREE=0X01;    
                 _FOUR=0X01;             
                 P0= _7_seg[disp_1] ;         
                  scan_cnt ++ ;               
                 break;                         
          case 2:                 
                  P0=0XFF; 	                
                 _ONE=0x01; 	              
                  _TWO=0x01; 	               
                  _THREE=0X00;                    
                  _FOUR=0X01;   	              
                  P0= _7_seg[disp_2]&0x7F ; // �j���I�G�p���I 	
                  scan_cnt ++ ;     
                  break;      
           case 3:                 
                     P0=0XFF;               
                     _ONE=0x01;        
                     _TWO=0x01;   
                     _THREE=0X01;    
                     _FOUR=0X00;              
                     scan_cnt ++ ;              
                    break;      
       }                  
   }  
 void main(void)  //�`�N�bSDCC��,main�����������p�g 
{  
    BIBI=0X01;   
    KEY0=0X01;    
    KEY1=0X01;     
    LCD_L_Delay (143) ;      
     Init_IRQ();  
   	while (1) 	
        {                     
                disp_0 = time_cnt % 10 ;   
                disp_1 = (time_cnt/10)%10 ;    
                disp_2= (sec_cnt%10);         
                disp_3 = (sec_cnt/10)%10 ; 
         }
 }