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/**************************************************************
; Copyright 2004 pingfan's mcustudio
; All rights Reserved
;作者：周堅(jiān)
;eeprom.c
;讀/寫(xiě)atmega8515內(nèi)部EEPROM的例子
;將數(shù)據(jù)0....9寫(xiě)入eeprom中，再讀出用數(shù)碼管顯示出來(lái)
***************************************************************/
#include "avr/io.h"
#include "avr/eeprom.h"
#define uchar unsigned char
#define Hidden 16
uchar DispTab[17]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0xFF};
uchar BitTab[6]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB};
uchar DispBuf[6]; //顯示緩沖區(qū)
unsigned char Counter=0;
static void io_init(void)
{
// PortA
PORTA = 0xff;
DDRA = 0xff;
// PortB
PORTB = 0x0;
DDRB = 0x0;
// PortC
PORTC = 0xfc;
DDRC = 0xfc;
// PortD
PORTD = 0x0;
DDRD = 0x0;
}
void mDelay(uint16_t DelayTim)
{ uint16_t i;
for(;DelayTim>0;DelayTim--)
{ for(i=0;i<600;i++)
{;}
}
}
void disp()
{ static uchar i;
uchar tmp;
if(++i>=6)
i=0;
PORTC=0xff; //關(guān)閉顯示
tmp=DispBuf[i];
PORTA=DispTab[tmp];
tmp=BitTab[i];
PORTC=tmp;
mDelay(1); //延時(shí)1ms
}
int main(void)
{ unsigned int Count=0;
unsigned char Addr=1; //向地址1里面寫(xiě)數(shù)字
uint8_t temp=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(jì)數(shù)值在0~9之間循環(huán)
disp(); //調(diào)用顯示程序
}
}
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