/**************************************************************
;eeprom.c
;讀/寫atmega8515內(nèi)部EEPROM的例子
;將數(shù)據(jù)0....9寫入eeprom中，再讀出用數(shù)碼管顯示出來
***************************************************************/

#include"avr/io.h"
#include"avr/eeprom.h"
#defineucharunsignedchar
#defineHidden16

ucharDispTab[17]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0xFF};
ucharBitTab[6]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB};
ucharDispBuf[6]; //顯示緩沖區(qū)

unsignedcharCounter=0;

statICvoidio_init(void)
{
//PortA
PORTA=0xff;
DDRA=0xff;
//PortB
PORTB=0x0;
DDRB=0x0;
//PortC
PORTC=0xfc;
DDRC=0xfc;
//PortD
PORTD=0x0;
DDRD=0x0;
}

voidmDelay(uint16_tDelayTim)
{ uint16_ti;
for(;DelayTim>0;DelayTim--)
{ for(i=0;i<600;i++)
{;}
}
}

voiddisp()
{ staticuchari;
uchartmp;
if(++i>=6)
i=0;
PORTC=0xff; //關閉顯示
tmp=DispBuf[i];
PORTA=DispTab[tmp];
tmp=BitTab[i];
PORTC=tmp;
mDelay(1); //延時1ms
}

intmain(void)
{ unsignedintCount=0;
unsignedcharAddr=1; //向地址1里面寫數(shù)字
uint8_ttemp=0;
io_init();
DispBuf[0]=Hidden;
DispBuf[1]=Hidden;
DispBuf[2]=Hidden;
DispBuf[3]=Hidden;
DispBuf[4]=0; //次低位顯示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; //計數(shù)值在0~9之間循環(huán)
disp(); //調(diào)用顯示程序
}
}