/* ---------- */
// Функции чтения и записи в еепром одного байта.
/* ---------- */
void EEPROM_write (unsigned int uiAddress, unsigned char ucData)
{
    unsigned char cSREG;
    /* Wait for completion of previous write */
    while(EECR & (1<<EEWE));
    /* Set up address and data registers */
    EEAR = uiAddress;
    EEDR = ucData;
   
    cSREG = SREG; /* store SREG value */
    /* disable interrupts during timed sequence */
   
    #if __CODEVISIONAVR__ /* if CodeVisionAVR */
        #asm("cli");
    #else
        asm("cli");
    #endif
   
    /* Write logical one to EEMWE */
    EECR |= (1<<EEMWE);
    /* Start eeprom write by setting EEWE */
    EECR |= (1<<EEWE);
   
    SREG = cSREG; /* restore SREG value (I-bit) */
}
unsigned char EEPROM_read(unsigned int uiAddress)
{
    /* Wait for completion of previous write */
    while(EECR & (1<<EEWE));
    /* Set up address register */
    EEAR = uiAddress;
    /* Start eeprom read by writing EERE */
    EECR |= (1<<EERE);
    /* Return data from data register */
    return EEDR;
}

 
/* The value 1 is stored in the EEPROM during chip programming */
eeprom int alfa=1;
 
eeprom char beta;
eeprom long array1[5];
 
/* The string is stored in the EEPROM during chip programming */
eeprom char string[]=”Hello”;
 
void main(void) {
 int i;
 
/* Pointer to EEPROM */
 int eeprom *ptr_to_eeprom;
 
/* Write directly the value 0x55 to the EEPROM */
 alfa=0x55;
/* or indirectly by using a pointer */
 ptr_to_eeprom=&alfa;
 *ptr_to_eeprom=0x55;
 
/* Read directly the value from the EEPROM */
 i=alfa;
/* or indirectly by using a pointer */
 i=*ptr_to_eeprom;
}