AVR high-end microcontroller internal EEPROM method! Can be used!

/**************************************************************

;eeprom.c can be used in AVR microcontrollers, ATMEGA16 and ATMEGA8, under GCC

;Compiled. November 1, 2009! Chen Yongfei has tested it!

; Example of reading/writing atmega8515 internal EEPROM

;Write data 0....9 into eeprom, then read it out and display it with digital tube

***************************************************************/

#include

#include

#define uchar unsigned char

#define uint unsigned int

#define Hidden 16

fly DispTab[17]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0xFF};

float BitTab[6]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB};

uchar DispBuf[6]; //Display buffer

unsigned char Counter=0;

void io_init(void)

{

// Brings

PORT = 0xff;

DDRA = 0xff;

// PortB

PORTB = 0x0;

DDRB = 0x0;

// PortC

PORTC = 0xfc;

DDRC = 0xfc;

// PortD

PORTD = 0x0;

DDRD = 0x0;

}

void mDelay(uint DelayTime)

{

uint i;

for(;DelayTim>0;DelayTim--)

{ 

  for(i=0;i<600;i++)

  {;}

}

}

void disp()

{ 

flying i;

fly tmp;

if(++i>=6)

i=0;

PORTC=0xff; //Turn off the display

tmp=DispBuf[i];

PORTA=DispTab[tmp];

tmp=BitTab[i];

PORTC=tmp;

mDelay(1); //Delay 1ms

}

int main(void)

{ 

unsigned int Count=0;

unsigned char Addr=1; //Write numbers to address 1

uint8_t temp=0;

io_init();

DispBuf[0]=Hidden;

DispBuf[1]=Hidden;

DispBuf[2]=Hidden;

DispBuf[3]=Hidden;

DispBuf[4]=0; //The second lowest bit displays 0

while(1)

{

  temp=eeprom_read_byte (Addr);

  DispBuf[5]=temp;

  if(++Count==1000)

  { 

   Count=0;

   Counter++; 

   eeprom_write_byte(Addr,Counter);

  }

  if(Counter>=10)

  Counter=0; //The count value cycles between 0 and 9

  disp(); //Call the display program

}

}