unsigned char ds1307_setdate(unsigned char year, unsigned char month, unsigned char day, unsigned char hour, unsigned char minute, unsigned char second)
{
//sanitize data
if (second < 0 || second > 59 ||
minute < 0 || minute > 59 ||
hour < 0 || hour > 23 ||
day < 1 || day > 31 ||
month < 1 || month > 12 ||
year < 0 || year > 99)
return 8;
//sanitize day based on month
if(day > pgm_read_byte(ds1307_daysinmonth + month - 1))
return 0;
//get day of week
unsigned char dayofweek = ds1307_getdayofweek(year, month, day);
//write date
i2c_start_wait(DS1307_ADDR | I2C_W);
i2c_wrt(0x00);//stop oscillator
i2c_wrt(ds1307_dec2bcd(second));
i2c_wrt(ds1307_dec2bcd(minute));
i2c_wrt(ds1307_dec2bcd(hour));
i2c_wrt(ds1307_dec2bcd(dayofweek));
i2c_wrt(ds1307_dec2bcd(day));
i2c_wrt(ds1307_dec2bcd(month));
i2c_wrt(ds1307_dec2bcd(year));
i2c_wrt(0x00); //start oscillator
i2c_stop();
return 1;
}
void ds1307_set_datetime(rtc_datetime_t *dtp){
//write date
i2c_start_wait(DS1307_ADDR | I2C_WRITE);
i2c_write(0x00);//set register pointer to 0
i2c_write(ds1307_dec2bcd(dtp->time.second));
i2c_write(ds1307_dec2bcd(dtp->time.minute));
i2c_write(ds1307_dec2bcd(dtp->time.hour));
i2c_write(ds1307_dec2bcd(dtp->date.dow));
i2c_write(ds1307_dec2bcd(dtp->date.dom));
i2c_write(ds1307_dec2bcd(dtp->date.month));
i2c_write(ds1307_dec2bcd(dtp->date.year));
// i2c_write(0b00010000); // write to register 7: Square wave settings
i2c_stop();
}
