Interfacing DS1302(RTC) with an 8051… The time display on Lcd can run but there are problems!! Need some help and guide.

[Ang wei qiang]

 

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For all the 1,3,5,7,9mins and so on…or maybe i should say is the odd 

 

mins.

It will display something like the patterns shown below for the 1 

 

minute. 

 

Here is a example of 85error that it display.

 

The first 5 patterns of the "1 hr and 5min

"01:85:00"

"01:05:01"

"01:85:02"

"01:05:03"

"01:85:04"

 

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As for all the 2,4,6,8,10mins and so on…or maybe i should say is the 

 

even mins.

It will display something like the patterns shown below for the first 

 

59 second and the 1 hour.

 

 

 

 

For the first 59 second,i show first five patterns of it.

"00:85:00"

"85:00:01"

"00:85:02"

"85:00:03"

"00:85:04"

.

.

.

.

 

"85:00:59"

 

 

For the starting of 1 minute,i show first five patterns of it.

"00:85:00"

"00:01:01"

"00:85:02"

"00:01:03"

"00:85:04"

.

.

.

.

 

 

 

For the starting of 1 hour,i show first five patterns of it.

"01:85:00"

"85:00:01"

"01:85:02"

"85:00:03"

"01:85:04"

.

.

.

.

 

 

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On top is the error that i face,im not sure how can i solve it.

 

The DS1302 header file,i got on a website and i have modify it to make the time to run.

 

What can be the problem that causing this??

 

Let me know anything that i could try to solve this problem.

Please,I need some guide and help with it.

 

I will paste the header file. Let me know if you want to see my c code.  ~~ THx ~~

 

 

 

Below is the modified header file code: (There are some part of it which i do not understand)

 

 

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

#ifndef _REAL_TIMER_DS1302_2003_7_21_ 

#define _REAL_TIMER_DS1302_2003_7_21_ 

 

#define  DS1302_CLK P1_7              //ʵʱʱÖÓʱÖÓÏßÒý½Å  

#define  DS1302_IO P1_6              //ʵʱʱÖÓÊý¾ÝÏßÒý½Å  

#define  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_WEEK_READ 0x8B

#define DS1302_DAY 0x86 

#define DS1302_DAY_READ 0x87 

#define DS1302_MONTH 0x88 

#define DS1302_MONTH_READ 0x89 

#define DS1302_YEAR 0x8C 

#define DS1302_YEAR_READ    0x8D 

#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_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_CLK = 0; 

    DS1302_RST = 1; 

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

    ucData = DS1302OutputByte();         // ¶Á1ByteÊý¾Ý 

    DS1302_CLK = 1; 

    DS1302_RST = 0; 

    return(ucData); 

} 

 

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

{ 

if(flag) 

Write1302(0x8E,0x80); 

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)));

DS1302_SetProtect(1);

} 

 

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_READ); 

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

ReadValue = Read1302(DS1302_WEEK_READ); 

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

ReadValue = Read1302(DS1302_MONTH_READ); 

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

ReadValue = Read1302(DS1302_YEAR_READ); 

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_READ); 

DS1302_SetProtect(0); 

if(flag) 

Write1302(DS1302_SECOND, Data|0x80); 

else 

Write1302(DS1302_SECOND, Data&0x7F); 

DS1302_SetProtect(1);

} 

 

#endif

 

 

 

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