Im doing c programming on 8051 and DS1302(RTC) to show time on LCD,there a problem..

[Ang wei qiang]

Im doing c programming on 8051 and DS1302(RTC) to show time on LCD,there a problem.. 
I have program a c code and modify a header file of DS1302 which i got online. 
I want to print out 23:59:45 on my LCD. 
But the problem is it only print out 23:59:85 on the LCD.
Other than that,it move from left to right.
It look something like that >>>>>> “23:59:85”
>>>>>> “ll23:59:8”
>>>>>> “5ll23:59:”
This is only the first 3 pattern of the problem. This continue move from left to right.
So what can be the problem?? 
Is there anything which i need to modify in my header file or the c code???
There is some part of code of the DS1302 header file which i do not understand.
I do need help.. Please take a look and help me check too. Thanks

I will show my c code and the modify header file of DS1302 below. 

 

Im doing c programming on 8051 and DS1302(RTC) to show time on LCD,there a problem.. 
I have program a c code and modify a header file of DS1302 which i got online. 
I want to print out 23:59:45 on my LCD. 
But the problem is it only print out 23:59:85 on the LCD.
Other than that,it move from left to right.
It look something like that >>>>>> “23:59:85”
>>>>>> “ll23:59:8”
>>>>>> “5ll23:59:”
This is only the first 3 pattern of the problem. This continue move from left to right.
So what can be the problem?? 
Is there anything which i need to modify in my header file or the c code???
There is some part of code of the DS1302 header file which i do not understand.
I do need help.. Please take a look and help me check too. Thanks

I will show my c code and the modify header file of DS1302 below. 

 

 

Here is the c code

---

 

 

#include <at89c51xd2.h>

#include <string.h>

#include <ds1302.h>

 

/*******************************************/

/* define the button name and the lcd pin  */

/*******************************************/

#define E   P1_2 //LCD E

#define RW P1_1 //LCD RW

#define RS P1_0 //LCD RS

#define LCD_DATA P2 //LCD Data port

SYSTEMTIME CurrentTime;

 

/************************************/

/*    Function that going to use    */

/************************************/

void delay(unsigned int);      //software delay

void strobe(void);            //write in data

void LCD_init(void);        //LCD initialisation

void LCD_print(unsigned char);      //print on LCD

void LCD_command(unsigned char);   //to set instruction to cursor

void LCD_TimerDisp(); //Show time

 

/*****************/

/* Main function */

/*****************/

void main(void)

{

unsigned char i;

 

for(i=0; i<20; i++)

delay(500);

 

LCD_init();

 

DS1302_SetTime(DS1302_SECOND, 45);

DS1302_SetTime(DS1302_MINUTE, 59);

DS1302_SetTime(DS1302_HOUR, 23);

 

LCD_TimerDisp();

 

while(1)

{

}

}

 

/************/

/* Function */

/************/

 

void delay(unsigned int y)

{

unsigned int x;

for(x=0; x<y; x++);

}

 

void strobe() //write in data

{

E = 1;

delay(500);

E = 0;

delay(500);

}

 

void LCD_init() //LCD initialisation

{

RS = 0;

RW = 0;

LCD_DATA = 0x38;

strobe();

LCD_DATA = 0x0c;

strobe();

LCD_DATA = 0x01;

strobe();

LCD_DATA = 0x06;

strobe();

}

 

void LCD_print(unsigned char alpha)  //print on LCD

{

RS = 1;     //data type

RW = 0;     //write enable

LCD_DATA = alpha; //LCD D0 to D7

strobe();

}

 

void LCD_command(unsigned char beta) //to set instruction to cursor

{

RS = 0;     //data type

RW = 0;     //write enable

LCD_DATA = beta;

strobe();

}

 

void LCD_TimerDisp()

{

 

unsigned char alphabet;

 

do

{

DS1302_GetTime(&CurrentTime);

DateToStr(&CurrentTime);

TimeToStr(&CurrentTime);

LCD_command(0x06);

for(alphabet=0; alphabet<9; alphabet++)

{

LCD_print(CurrentTime.TimeString[alphabet]);

}

delay(300);

}while(1);

}

 

 

---

 

 

Here is the modify header file of DS1302

---

 

/***************************************************************************/ 

#ifndef _REAL_TIMER_DS1302_2003_7_21_ 

#define _REAL_TIMER_DS1302_2003_7_21_ 

 

sbit  DS1302_CLK = P1^7;              //ʵʱʱÖÓʱÖÓÏßÒý½Å  

sbit  DS1302_IO  = P1^6;              //ʵʱʱÖÓÊý¾ÝÏßÒý½Å  

sbit  DS1302_RST = P1^5;              //ʵʱʱÖÓ¸´Î»ÏßÒý½Å 

sbit  ACC0 = ACC^0; 

sbit  ACC7 = ACC^7; 

 

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[9]; 

unsigned char TimeString[9]; 

}SYSTEMTIME; //¶¨ÒåµÄʱ¼äÀàÐÍ 

 

#define AM(X) X 

#define PM(X) (X+12)              // ת³É24СʱÖÆ 

#define DS1302_SECOND 0x80

#define DS1302_SECOND_READ 0x81 

#define DS1302_MINUTE 0x82

#define DS1302_MINUTE_READ 0x83 

#define DS1302_HOUR 0x84

#define DS1302_HOUR_READ 0x85  

#define DS1302_WEEK 0x8A 

#define DS1302_DAY 0x86 

#define DS1302_MONTH 0x88 

#define DS1302_YEAR 0x8C 

#define DS1302_RAM(X) (0xC0+(X)*2)   //ÓÃÓÚ¼ÆËã DS1302_RAM µØÖ·µÄºê

 

 

void DS1302InputByte(unsigned char d) //ʵʱʱÖÓдÈëÒ»×Ö½Ú(ÄÚ²¿º¯Êý) 

{  

    unsigned char i; 

    ACC = d; 

    for(i=8; i>0; i–) 

    { 

        DS1302_IO = ACC0;           //Ï൱ÓÚ»ã±àÖÐµÄ RRC 

        DS1302_CLK = 1; 

        DS1302_CLK = 0; 

        ACC = ACC >> 1;  

    }  

} 

 

unsigned char DS1302OutputByte(void) //ʵʱʱÖÓ¶ÁÈ¡Ò»×Ö½Ú(ÄÚ²¿º¯Êý) 

{  

    unsigned char i; 

    for(i=8; i>0; i–) 

    { 

        ACC = ACC >>1;         //Ï൱ÓÚ»ã±àÖÐµÄ RRC  

        ACC7 = DS1302_IO; 

        DS1302_CLK = 1; 

        DS1302_CLK = 0; 

    }  

    return(ACC);  

} 

 

void Write1302(unsigned char ucAddr, unsigned char ucDa) //ucAddr: DS1302µØÖ·, ucData: ҪдµÄÊý¾Ý 

{ 

    DS1302_RST = 0; 

    DS1302_CLK = 0; 

    DS1302_RST = 1; 

    DS1302InputByte(ucAddr);       // µØÖ·£¬ÃüÁî  

    DS1302InputByte(ucDa);       // д1ByteÊý¾Ý 

    DS1302_CLK = 1; 

    DS1302_RST = 0; 

}  

 

unsigned char Read1302(unsigned char ucAddr) //¶ÁÈ¡DS1302ijµØÖ·µÄÊý¾Ý 

{ 

    unsigned char ucData; 

    DS1302_RST = 0; 

    DS1302_CLK = 0; 

    DS1302_RST = 1; 

    DS1302InputByte(ucAddr|0x01);        // µØÖ·£¬ÃüÁî  

    ucData = DS1302OutputByte();         // ¶Á1ByteÊý¾Ý 

    DS1302_CLK = 1; 

    DS1302_RST = 0; 

    return(ucData); 

} 

 

void DS1302_SetProtect(bit flag)        //ÊÇ·ñд±£»¤ 

{ 

if(flag) 

Write1302(0x8E,0x10); 

else 

Write1302(0x8E,0x00); 

} 

 

void DS1302_SetTime(unsigned char Address, unsigned char Value)        // ÉèÖÃʱ¼äº¯Êý 

{ 

DS1302_SetProtect(0); 

Write1302(Address, ((Value/10)<<4 | (Value%10)));  

} 

 

void DS1302_GetTime(SYSTEMTIME *Time) 

{ 

unsigned char ReadValue; 

ReadValue = Read1302(DS1302_SECOND_READ); 

Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 

ReadValue = Read1302(DS1302_MINUTE_READ); 

Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); 

ReadValue = Read1302(DS1302_HOUR_READ); 

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) 

{ 

Time->DateString[0] = Time->Year/10 + ‘0’; 

Time->DateString[1] = Time->Year%10 + ‘0’; 

Time->DateString[2] = ‘-‘; 

Time->DateString[3] = Time->Month/10 + ‘0’; 

Time->DateString[4] = Time->Month%10 + ‘0’; 

Time->DateString[5] = ‘-‘; 

Time->DateString[6] = Time->Day/10 + ‘0’; 

Time->DateString[7] = Time->Day%10 + ‘0’; 

Time->DateString[8] = ‘’; 

} 

 

void TimeToStr(SYSTEMTIME *Time) 

{ 

Time->TimeString[0] = Time->Hour/10 + ‘0’; 

Time->TimeString[1] = Time->Hour%10 + ‘0’; 

Time->TimeString[2] = ‘:’; 

Time->TimeString[3] = Time->Minute/10 + ‘0’; 

Time->TimeString[4] = Time->Minute%10 + ‘0’; 

Time->TimeString[5] = ‘:’; 

Time->TimeString[6] = Time->Second/10 + ‘0’; 

Time->TimeString[7] = Time->Second%10 + ‘0’; 

Time->DateString[8] = ‘’; 

} 

/*  

void Initial_DS1302(void) 

{ 

unsigned char Second=Read1302(DS1302_SECOND); 

if(Second&0x80)   

DS1302_SetTime(DS1302_SECOND,0); 

} 

 

 

void BurstWrite1302(unsigned char *pWClock) //ÍùDS1302дÈëʱÖÓÊý¾Ý(¶à×Ö½Ú·½Ê½) 

{ 

    unsigned char i; 

    Write1302(0x8e,0x00);         // ¿ØÖÆÃüÁî,WP=0,д²Ù×÷? 

    DS1302_RST = 0; 

    DS1302_CLK = 0; 

    DS1302_RST = 1; 

    DS1302InputByte(0xbe);         // 0xbe:ʱÖÓ¶à×Ö½ÚдÃüÁî 

    for (i = 8; i>0; i–)     //8Byte = 7Byte ʱÖÓÊý¾Ý + 1Byte ¿ØÖÆ 

    { 

        DS1302InputByte(*pWClock); // д1ByteÊý¾Ý 

        pWClock++; 

    } 

    DS1302_CLK = 1; 

    DS1302_RST = 0; 

}*/

/******************************************************************************** 

void BurstRead1302(unsigned char *pRClock) //¶ÁÈ¡DS1302ʱÖÓÊý¾Ý(ʱÖÓ¶à×Ö½Ú·½Ê½) 

{ 

    unsigned char i; 

    DS1302_RST = 0; 

    DS1302_CLK = 0; 

    DS1302_RST = 1; 

    DS1302InputByte(0xbf);             // 0xbf:ʱÖÓ¶à×Ö½Ú¶ÁÃüÁî  

    for (i=8; i>0; i–)  

    { 

       *pRClock = DS1302OutputByte();   // ¶Á1ByteÊý¾Ý  

       pRClock++; 

    } 

    DS1302_CLK = 1; 

    DS1302_RST = 0; 

} 

 

void DS1302_TimeStop(bit flag)           // ÊÇ·ñ½«Ê±ÖÓÍ£Ö¹ 

{ 

unsigned char Data; 

Data=Read1302(DS1302_SECOND); 

DS1302_SetProtect(0); 

if(flag) 

Write1302(DS1302_SECOND, Data|0x80); 

else 

Write1302(DS1302_SECOND, Data&0x7F); 

} 

********************************************************************************/ 

#endif

 

---

 

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