eeprom_interne [GeWiki]

Ajouter les deux fichiers ci-dessous (eeprom.h et eeprom.c) à votre projet. Inclure le fichier eeprom.h dans chaque fichier utilisant les fonctions eeprom.

eeprom.h

/*  Copyright (C) 2008 Philippe Arlotto arlotto@univ-tln.fr 
    IUT GEII Univerity of Toulon 
    Include file for PIC18 EEPROM  read write utilities
*/
#ifndef _EEPROM_H
#define _EEPROM_H
 
#define _EEPROM_WRITE_ENABLE_GIE // comment out if interrupts are not used.
 
unsigned char EEWriteFloat(float f, unsigned char adr);
float EEReadFloat(unsigned char adr);
 
unsigned char EEWriteInt(int entier, unsigned char adr);
int EEReadInt(unsigned char adr);
 
unsigned char EEReadByte(unsigned char adr);
void EEWriteByte(unsigned char data,unsigned char adr);
 
#endif

eeprom.c

/*
    Copyright (C) 2008 Philippe Arlotto arlotto@univ-tln.fr 
    IUT GEII Univerity of Toulon 
    PIC18 EEPROM read write utilities
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#include "eeprom.h"
#include <p18cxxx.h>
 
unsigned char EEWriteFloat(float f, unsigned char adr) {
 
   int i ;
   unsigned char *p ;
 
   p = (unsigned char *)&f ;
   for(i=0;i<sizeof(float);i++) {
 
      EEWriteByte(*p,adr);
      p++;
      adr++;
   }
  return adr ;
}
unsigned char EEWriteInt(int entier, unsigned char adr) {
 
   int i ;
   unsigned char *p ;
 
   p = (unsigned char *)&entier ;
   for(i=0;i<sizeof(int);i++) {
 
      EEWriteByte(*p,adr);
      p++;
      adr++;
   }
  return adr ;
}
 
float EEReadFloat(unsigned char adr){
      float f ;
      int i ;
      unsigned char * p ;
      p = (unsigned char*) &f;
      for(i=0;i<sizeof(float);i++) {
 
      *p=EEReadByte(adr);
      p++;
      adr++;
   }
   return f ;
}
int EEReadInt(unsigned char adr){
      int Entier ;
      int i ;
      unsigned char * p ;
      p = (unsigned char*) &Entier;
      for(i=0;i<sizeof(int);i++) {
 
      *p=EEReadByte(adr);
      p++;
      adr++;
   }
   return Entier ;
}
 
unsigned char EEReadByte(unsigned char adr)  
{
 
EEADR = adr ;
EECON1bits.EEPGD = 0 ;
EECON1bits.CFGS = 0 ;
EECON1bits.RD = 1 ;
return EEDATA ; 
 
}	
 
 
void EEWriteByte(unsigned char data,unsigned char adr) 
{
 
EEADR = adr ;
EEDATA = data ;
EECON1bits.EEPGD = 0 ;
EECON1bits.CFGS = 0 ;
EECON1bits.WREN = 1 ; 
INTCONbits.GIE = 0 ;
EECON2=0x55;
EECON2=0xAA;
EECON1bits.WR = 1 ;
#ifdef _EEPROM_WRITE_ENABLE_GIE
INTCONbits.GIE = 1 ;
#endif
while(EECON1bits.WR ) ;
EECON1bits.WREN = 0;
 
}