ds1302.c

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#include <Intrins.h>
#include <At89x51.h>
#include "constant.h"
#include "function.h"
#include "variable.h"
#include "chinese_const.h"

sbit a0=ACC^0;
sbit a1=ACC^1;
sbit a2=ACC^2;
sbit a3=ACC^3;
sbit a4=ACC^4;
sbit a5=ACC^5;
sbit a6=ACC^6;
sbit a7=ACC^7;
//#define DS1302_CLK P1_4
//#define DS1302_IO P1_5
//#define DS1302_RST P1_6
void Reset_Ds1302(void)
{
   DS1302_CLK=0;
   DS1302_RST=0;
	 _nop_();
	 DS1302_RST=1;
}
void Ds1302_Write_Byte(unsigned char byte)
{
	ACC=byte;
	DS1302_IO=a0;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a1;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a2;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a3;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a4;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a5;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a6;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
	DS1302_IO=a7;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=1;_nop_();
}

unsigned char Ds1302_Read_Byte(void)
{
	DS1302_IO=1;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a0=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a1=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a2=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a3=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a4=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a5=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a6=DS1302_IO;
	DS1302_CLK=1;_nop_();DS1302_CLK=0;_nop_();a7=DS1302_IO;
	return ACC;
}

unsigned char Ds1302_Read_Register(unsigned char address)
{
unsigned char i;
	Reset_Ds1302();
	Ds1302_Write_Byte(address);
	i=Ds1302_Read_Byte();
  DS1302_RST=0;
	DS1302_CLK=0;
	return i;
}

void Ds1302_Write_Register(unsigned char address,unsigned char content)
{
	Reset_Ds1302();
	Ds1302_Write_Byte(address);
	Ds1302_Write_Byte(content);
  DS1302_RST=0;
	DS1302_CLK=0;
}

void Ds1302_Ini(void)
{
	Ds1302_Write_Register(0x8e,0x00);//Ds1302 write enable:10001110,0
	Ds1302_Write_Register(0x80,0x50);//Ds1302 sec,same as enable osc
	Ds1302_Write_Register(0x82,0x58);//Ds1302 min
	Ds1302_Write_Register(0x84,0x23);//Ds1302 hour
	Ds1302_Write_Register(0x86,0x19);//Ds1302 day
	Ds1302_Write_Register(0x88,0x12);//Ds1302 month
	Ds1302_Write_Register(0x8a,0x5);//Ds1302 week
	Ds1302_Write_Register(0x8c,0x04);//Ds1302 year
	Ds1302_Write_Register(0x8e,0x80);//Ds1302 write disable:10001110,0
}
void Ds1302_Demo(void)
{

unsigned char sec,min,hour,day,month,week,year;
	EA=0;
	Reset_Ds1302();
	Ds1302_Write_Byte(0xbf);
	sec=Ds1302_Read_Byte();
	min=Ds1302_Read_Byte();
	hour=Ds1302_Read_Byte();
	day=Ds1302_Read_Byte();
	month=Ds1302_Read_Byte();
	week=Ds1302_Read_Byte();
	year=Ds1302_Read_Byte();
	EA=1;
 	DS1302_RST=0;
	DS1302_CLK=0;

	Write_Command(LCD_LINE3_ADDR);//for lcd display 
	Write_Data(NumberToCode[2]);
	Write_Data(NumberToCode[0]);	
	Write_Command(LCD_LINE3_ADDR+1);
	Write_Data(NumberToCode[(year&0xf0)>>4]);
	Write_Data(NumberToCode[year&0x0f]);	
  	Lcd_Display_Char(3,3,'Y');
	Write_Command(LCD_LINE3_ADDR+3);
	Write_Data(NumberToCode[(week&0xf0)>>4]);
	Write_Data(NumberToCode[week&0x0f]);	

	Write_Command(LCD_LINE4_ADDR);
	Write_Data(NumberToCode[(month&0xf0)>>4]);
	Write_Data(NumberToCode[month&0x0f]);	
	Write_Command(LCD_LINE4_ADDR+1);
	Write_Data('-');
	Write_Data(NumberToCode[(day&0xf0)>>4]);	
	Write_Command(LCD_LINE4_ADDR+2);
	Write_Data(NumberToCode[day&0x0f]);
	Write_Data(' ');	
	Write_Command(LCD_LINE4_ADDR+3);
	Write_Data(NumberToCode[(hour&0xf0)>>4]);
	Write_Data(NumberToCode[hour&0x0f]);	
	Write_Command(LCD_LINE4_ADDR+4);
	Write_Data(':');
	Write_Data(NumberToCode[(min&0xf0)>>4]);
	Write_Command(LCD_LINE4_ADDR+5);
	Write_Data(NumberToCode[min&0x0f]);	
	Write_Data(':');
	Write_Command(LCD_LINE4_ADDR+6);
	Write_Data(NumberToCode[(sec&0xf0)>>4]);
	Write_Data(NumberToCode[sec&0x0f]);	

}