C8051F340驱动DS1302时钟芯片的移植读写程序

/*  
*********************************************************************************************************  
* DS1302 Driver for C8051F340 MCU     
* version 1.0  
* File : DS1302.c  
* By   : ZJP        2008/07/28  
*********************************************************************************************************  
*/   
#include "C8051F340.h"    
#include <STDIO.H>    
#include <ABSACC.H>    
#include <INIT.H>    
   
unsigned char  my_second,my_minute,my_hour;   
unsigned char  my_date,my_month,my_year;   
unsigned char  my_week;   
   
sbit time_clock= P2^5;   
sbit time_ce = P1^4;   
sbit time_data = P1^5;   
   
/*========== 读ds1302 地址为0时是秒,地址为1时是分,地址为2时是小时=============*/   
//3是日期,4是月,5是星期,6是年,7是控制//    
unsigned char read_time(unsigned char address)   
{   
   unsigned char commend;   
   unsigned char kk;      
   unsigned char my_data;      
   time_clock=0;   
   time_clock=0;     

   time_ce=0;   
   time_ce=0;      
   time_ce=1;   
   time_ce=1;    
   address<<=1;     
   commend=address+0x81;    //  高位为1是使能读写，低位为1是读操作         
   for(kk=0;kk<8;kk++)   
   {        
   time_data=(bit)(commend&0x01);        
   time_clock=1;   
   time_clock=1;   
   commend>>=1;      
   time_clock=0;   
   time_clock=0;    
   }   
   my_data=0;       
   for(kk=0;kk<7;kk++)   
   {       
    if(time_data==1) my_data += 0x80;   
    time_clock=1;   
    time_ce=1;   
    my_data>>=1;   
    time_clock=0;   
    time_clock=0;   
          
   }   
   if(time_data==1) my_data += 0x80;   
   time_clock=1;   
   time_clock=1;   
   time_clock=0;