void rtcCorrSec(void)
{
I2CswStart(RTC_I2C_ADDR);
I2CswWriteByte(RTC_SEC);
I2CswWriteByte(rtcDecToBinDec((uint8_t)rtc.sec));
I2CswStop();
}
void I2CswStart(uint8_t addr)
{
IN(I2C_SCL); // Pullup SCL = 1
IN(I2C_SDA); // Pullup SDA = 1
_delay_us(5);
OUT(I2C_SDA); // Active SDA = 0
_delay_us(5);
OUT(I2C_SCL); // Active SCL = 0
I2CswWriteByte(addr);
}
static void rtcSaveTime(void)
{
int8_t etm = rtc.etm;
if (etm > RTC_WDAY) {
rtcWeekDay();
etm = RTC_WDAY;
}
I2CswStart(RTC_I2C_ADDR);
I2CswWriteByte((uint8_t)etm);
if (etm == RTC_SEC) {
I2CswWriteByte(0);
} else {
for (int8_t i = etm; i <= RTC_YEAR; i++)
I2CswWriteByte(rtcDecToBinDec(*((uint8_t *)&rtc + i)));
}
I2CswStop();
}
void I2CswStart(uint8_t addr)
{
DDR(I2C_SCL) &= ~I2C_SCL_LINE; // Pullup SCL = 1
DDR(I2C_SDA) &= ~I2C_SDA_LINE; // Pullup SDA = 1
_delay_us(5);
DDR(I2C_SDA) |= I2C_SDA_LINE; // Active SDA = 0
_delay_us(5);
DDR(I2C_SCL) |= I2C_SCL_LINE; // Active SCL = 0
I2CswWriteByte(addr);
return;
}
void rtcReadTime(void)
{
uint8_t temp;
uint8_t i;
I2CswStart(RTC_I2C_ADDR);
I2CswWriteByte(RTC_SEC);
I2CswStart(RTC_I2C_ADDR | I2C_READ);
for (i = RTC_SEC; i <= RTC_YEAR; i++) {
temp = I2CswReadByte((i == RTC_YEAR) ? I2C_NOACK : I2C_ACK);
*((int8_t *)&rtc + i) = (int8_t)rtcBinDecToDec(temp);
}
I2CswStop();
}
