ref2.c

DS1302 reference code

#ifndef _REAL_TIMER_DS1302_2003_7_21_ 
#define _REAL_TIMER_DS1302_2003_7_21_ 
 
sbit  DS1302_CLK = P1^6;              //实时时钟时钟线引脚  
sbit  DS1302_IO  = P1^7;              //实时时钟数据线引脚  
sbit  DS1302_RST = P1^5;              //实时时钟复位线引脚 
sbit  ACC0 = ACC^0; 
sbit  ACC7 = ACC^7; 
char hide_sec,hide_min,hide_hour,hide_day,hide_week,hide_month,hide_year; 
 
typedef struct __SYSTEMTIME__ 
{ 
	unsigned char Second; 
	unsigned char Minute; 
	unsigned char Hour; 
	unsigned char Week; 
	unsigned char Day; 
	unsigned char Month; 
	unsigned char  Year; 
	unsigned char DateString[11]; 
	unsigned char TimeString[9]; 
}SYSTEMTIME;	//定义的时间类型 
 
#define AM(X)	X 
#define PM(X)	(X+12)            	  // 转成24小时制 
#define DS1302_SECOND	0x80 
#define DS1302_MINUTE	0x82 
#define DS1302_HOUR		0x84  
#define DS1302_WEEK		0x8A 
#define DS1302_DAY		0x86 
#define DS1302_MONTH	0x88 
#define DS1302_YEAR		0x8C 
#define DS1302_RAM(X)	(0xC0+(X)*2)   	//用于计算 DS1302_RAM 地址的宏  
 
void DS1302InputByte(unsigned char d) 	//实时时钟写?一字节(内部函数) 
{  
    unsigned char i; 
    ACC = d; 
    for(i=8; i>0; i--) 
    { 
        DS1302_IO = ACC0;           	//相当于汇编中的 RRC 
        DS1302_CLK = 1; 
        DS1302_CLK = 0; 
        ACC = ACC >> 1;  
    }  
} 
 
unsigned char DS1302OutputByte(void) 	//实时时钟读?一字节(内部函数) 
{  
    unsigned char i; 
    for(i=8; i>0; i--) 
    { 
        ACC = ACC >>1;         			//相当于汇编中的 RRC  
        ACC7 = DS1302_IO; 
        DS1302_CLK = 1; 
        DS1302_CLK = 0; 
    }  
    return(ACC);  
} 
 
void Write1302(unsigned char ucAddr, unsigned char ucDa)	//ucAddr: DS1302地址, ucData: 要写的数据 
{ 
    DS1302_RST = 0; 
    DS1302_CLK = 0; 
    DS1302_RST = 1; 
    DS1302InputByte(ucAddr);       	// 地址，命令  
    DS1302InputByte(ucDa);       	// 写1Byte数据 
    DS1302_CLK = 1; 
    DS1302_RST = 0; 
}  
 
unsigned char Read1302(unsigned char ucAddr)	//读?DS1302某地址的数据 
{ 
    unsigned char ucData; 
    DS1302_RST = 0; 
    DS1302_CLK = 0; 
    DS1302_RST = 1; 
    DS1302InputByte(ucAddr|0x01);        // 地址，命令  
    ucData = DS1302OutputByte();         // 读1Byte数据 
    DS1302_CLK = 1; 
    DS1302_RST = 0; 
    return(ucData); 
} 
 
void DS1302_SetProtect(bit flag)        //是否写保护 
{ 
	if(flag) 
		Write1302(0x8E,0x10); 
	else 
		Write1302(0x8E,0x00); 
} 
 
void DS1302_SetTime(unsigned char Address, unsigned char Value)        // 设置时间函数 
{ 
	DS1302_SetProtect(0); 
	Write1302(Address, ((Value/10)<<4 | (Value%10)));  
} 
 
void DS1302_GetTime(SYSTEMTIME *Time) 
{ 
	unsigned char ReadValue; 
	ReadValue = Read1302(DS1302_SECOND); 
	Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 
	ReadValue = Read1302(DS1302_MINUTE); 
	Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 
	ReadValue = Read1302(DS1302_HOUR); 
	Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 
	ReadValue = Read1302(DS1302_DAY); 
	Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);	 
	ReadValue = Read1302(DS1302_WEEK); 
	Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 
	ReadValue = Read1302(DS1302_MONTH); 
	Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 
	ReadValue = Read1302(DS1302_YEAR); 
	Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);	 
} 
 
void DateToStr(SYSTEMTIME *Time) 
{   if(hide_year<2) 
    { 
	  Time->DateString[0] = Time->Year/10 + '0'; 
	  Time->DateString[1] = Time->Year%10 + '0'; 
	} 
	  else 
	    { 
	      Time->DateString[0] = ' '; 
	      Time->DateString[1] = ' '; 
		} 
	Time->DateString[2] = '-'; 
	if(hide_month<2) 
	{ 
	  Time->DateString[3] = Time->Month/10 + '0'; 
	  Time->DateString[4] = Time->Month%10 + '0'; 
	} 
	  else 
	  { 
	    Time->DateString[3] = ' '; 
	    Time->DateString[4] = ' '; 
	  } 
	Time->DateString[5] = '-'; 
	if(hide_day<2) 
	{ 
	  Time->DateString[6] = Time->Day/10 + '0'; 
	  Time->DateString[7] = Time->Day%10 + '0'; 
	} 
	  else 
	  { 
	    Time->DateString[6] = ' '; 
	    Time->DateString[7] = ' ';	     
	  } 
	if(hide_week<2) 
	{ 
	  Time->DateString[8] = ' '; 
	  Time->DateString[9] = Time->Week%10 + '0'; 
	} 
	  else 
	  { 
	    Time->DateString[8] = ' '; 
	    Time->DateString[9] = ' '; 
	  } 
 
	Time->DateString[10] = '\0'; 
} 
 
void TimeToStr(SYSTEMTIME *Time) 
{   if(hide_hour<2) 
    { 
	  Time->TimeString[0] = Time->Hour/10 + '0'; 
	  Time->TimeString[1] = Time->Hour%10 + '0'; 
	} 
	  else 
	    { 
	      Time->TimeString[0] = ' '; 
	      Time->TimeString[1] = ' '; 
		} 
	Time->TimeString[2] = ':'; 
    if(hide_min<2) 
	{ 
	  Time->TimeString[3] = Time->Minute/10 + '0'; 
	  Time->TimeString[4] = Time->Minute%10 + '0'; 
	} 
	  else 
	    { 
	      Time->TimeString[3] = ' '; 
	      Time->TimeString[4] = ' '; 
   	    } 
	Time->TimeString[5] = ':'; 
    if(hide_sec<2) 
    { 
	  Time->TimeString[6] = Time->Second/10 + '0'; 
	  Time->TimeString[7] = Time->Second%10 + '0'; 
    } 
      else 
       { 
         Time->TimeString[6] = ' '; 
	     Time->TimeString[7] = ' '; 
       } 
	Time->DateString[8] = '\0'; 
} 
 
void Initial_DS1302(void) 
{    
	unsigned char Second=Read1302(DS1302_SECOND); 
	Write1302(0x8e,0x00); //写?允许 
	Write1302(0x80,0x50); 
	Write1302(0x82,0x56); 
	Write1302(0x84,0x22); 
	Write1302(0x8e,0x80); //禁止写? 
	if(Second&0x80)		   
		DS1302_SetTime(DS1302_SECOND,0x80); 
} 
 
#endif