#include <system.h>
#include <delay.h>

//讀/寫EEPROM，內部從16地址開始，對外為0地址
void EEPROM_write(unsigned char adr, unsigned char dat)
{
	while( EECR & BIT(EEWE) );//第一步:等待EEWE為0 
	EEARH 	   = 0;
	EEARL  	   = adr + 16;    //第三步:新的地址
	EEDR	   = dat;         //第四步:寫的新的數據
	_CLI();
	EECR 	  |= BIT(EEMWE);  //第五步:EEMWE=1,EEWE=0
	EECR 	  |= BIT(EEWE);   //第六步:EEWE=1
	delay(100);
	_SEI();
}
//采用查詢方法讀,寫EEPROM
unsigned char EEPROM_read(unsigned char adr)
{
	while( EECR & BIT(EEWE) );
	EEARH 	   = 0;
	EEARL  	   = adr + 16;
	EECR 	  |= BIT(EERE);
	delay(10);
	return(EEDR);
}