uint8_t I2C_ReadRegister(uint8_t deviceRegister)
{
uint8_t data = 0;
// start and write address
I2C_Start(DS1307);
I2C_Write(deviceRegister); // set register pointer
// repeated start for read from address we sent earlier
I2C_Start(DS1307 + TW_READ);
data = I2C_ReadNACK();
I2C_Stop();
return data;
}
byte I2C_ReadRegister1(uint16_t deviceRegister)
{
byte data = 0;
byte status;
status=I2C_Start();
status=I2C_SendAddr(AT256); // send device bus address
status=I2C_Write(deviceRegister>>8); //parte alta
status=I2C_Write(deviceRegister); // parte baja
status=I2C_Start();
status=I2C_SendAddr(AT256+READ); // restart as a read operation
data = I2C_ReadNACK(); // read the register data
I2C_Stop(); // stop
while(TWCR & (1<<TWSTO));
return data;
}
