Ich verstehe die Warnung nicht

void ReadRTC(uint8_t *Year,uint8_t *Months,uint8_t *Day,uint8_t *Day_of_Weack,uint8_t *hour,uint8_t *minutes,uint8_t *scundes)

{

    i2c_start_wait(DEV_RV8564+I2C_WRITE);     

              i2c_write(2);                            

              i2c_rep_start(DEV_RV8564+I2C_READ);       

    *scundes  = i2c_readAck();

    *minutes  = i2c_readAck();

     *hour  = i2c_readAck();

    *Day  = i2c_readAck()-1;

     *Day_of_Weack  = i2c_readAck();

    *Months  = i2c_readAck();

              *Year = i2c_readNak();  

}

typedef volatile struct // 15 Byte

{

  uint8_t sekunde;

  uint8_t minute;

  uint8_t stunde;

  uint8_t Wochentag;

  uint8_t tag;

  uint8_t monat;

  uint8_t jahr;

  unsigned int crc;

}rtc;

rtc aktTime;

while(1)

  {

       ReadRTC(&aktTime.jahr,&aktTime.monat,&aktTime.tag,&aktTime.Wochentag,&aktTime.stunde,&aktTime.minute,&aktTime.sekunde);

  }