eeprom_rw.h

AVR单片机程序访问EEPROM程序库

#ifndef EEPROM_RW_H
#define EEPROM_RW_H

void eeprom_write (unsigned char num, unsigned int addr, unsigned char *val);
void eeprom_read (unsigned char num, unsigned int addr, unsigned char *val);
void eeprom_write (uchar num, uint addr, uchar *val) 
{ 
 while (num) 
 { 
   while ( EECR&0x02 );  //判断EEWE是否为0 
   EEAR = addr; 
   EEDR = *val; 
   CLI(); 
   EECR = EECR|0x04;     //置EEMWE为1 
   EECR = EECR|0x02;     //置EEWE为1 
   SEI(); 
   addr++; 
   val++;  
   num--; 
 }  
} 

void eeprom_read (uchar num, uint addr, uchar *val) 
{ 
 while (num) 
 { 
   while ( EECR&0x01 );  //判断EEWE是否为0 
   EEAR = addr; 
   EECR = EECR|0x01;     //置EERE为1 
   *val = EEDR; 
   addr++; 
   val++;  
   num--; 
 } 
} 

#endif