[SOLVED] Days programming for rtc DS1307

paulfjujo said:

hello,


in your program , you forget the day of the week !
add this variable and treat it in your program..

Code:

#define DS1307_ID 0xD0
#define SEC   0x00
#define MIN   0x01
#define HOUR  0x02
#define DOW  0x03      <- Day of week
#define DATE  0x04
#define MONTH 0x05
#define YEAR  0x06

example:

Code:

void ds1307_get_date(void)
{
	I2CStart();
	writeI2C(DS1307_ADDR);
	writeI2C(0x03);                         // Start at REG 3 - Day of the week
	I2CRestart();
	writeI2C(DS1307_ADDR+1);
	dow  = bcd2bin(Read_I2C(0) );   // REG 3
	date = bcd2bin(Read_I2C(0) );   // REG 4
	mth  = bcd2bin(Read_I2C(0) );   // REG 5
	year = bcd2bin(Read_I2C(1));    // REG 6
	I2CStop();
}

Click to expand...

Sudhp said:

Yeah.....I did this....
If i have to show sunday then I will give a command of 0x01 to save in rtc.....
but it's display on lcd as 1 as read from rtc......If I have to show sunday then should I make a program for this or It will show sunday on the lcd.....???

Click to expand...

Raady Here said:

Yes , make a loop and print day based on the number you get !

Click to expand...

paulfjujo said:

hello

example

Code:

unsigned char hr,min,sec,dow,mth,year,date;

char Jour_Sem [][6]={"Diman","Lundi", "Mardi", "Mercr", "Jeudi", "Vendr", "Samed"};
// length of literal=5 cars + Zero

static unsigned char Texte[80];
unsigned char *txt;


void ds1307_set_date(char dow,char date, char mth, char year );
void ds1307_get_date(void);


void ds1307_set_date(char date, char mth, char year, char day)
{
	I2CStart();
	writeI2C(DS1307_ADDR);      // I2C write address
	writeI2C(0x03);            // Start at REG 0 - Seconds
	writeI2C(bin2bcd(dow));
	writeI2C(bin2bcd(date));
	writeI2C(bin2bcd(mth));
	writeI2C(bin2bcd(year));
	writeI2C(0x10);            // REG 7 - enable squarewave output pin
	I2CStop();
}

void ds1307_get_date(void)
{
	I2CStart();
	writeI2C(DS1307_ADDR);
	writeI2C(0x03);            // Start at REG 3 - Day of week
	I2CRestart();
	writeI2C(DS1307_ADDR+1);
	dow  = bcd2bin(Read_I2C(0) );   // REG 3
	date = bcd2bin(Read_I2C(0) );   // REG 4
	mth  = bcd2bin(Read_I2C(0) );   // REG 5
	year = bcd2bin(Read_I2C(1));    // REG 6
	I2CStop();
}


void main()
{

.....
	ds1307_set_time(19,58,0); 
	ds1307_set_date(5, 23,8,13);   // vend 23 aout 2013
	

    txt=&Texte[0];
    ds1307_get_date();
    LCD_Erase_Line(4);  
    k=sprintf(txt,"Date is %s %02d/20%02d ",Jour_Sem [dow],date,mth,year); 
     LCD_puts(txt);

Click to expand...