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/*********************************************************************
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/*********************************************************************
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 *
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 *
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 *   Functions for reading and writing to EEPROM.
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 *   Functions for reading and writing to EEPROM.
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 *
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 *
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 *********************************************************************
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 *********************************************************************
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 * FileName:            $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/Include/EEAccess.c $
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 * FileName:            $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/Include/EEAccess.c $
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 * Last changed:    $LastChangedDate: 2006-11-14 20:15:02 +0100 (Tue, 14 Nov 2006) $
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 * Last changed:    $LastChangedDate: 2006-11-20 21:31:03 +0100 (Mon, 20 Nov 2006) $
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 * By:          $LastChangedBy: johboh $
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 * By:          $LastChangedBy: johboh $
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 * Revision:        $Revision: 94 $
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 * Revision:        $Revision: 139 $
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 ********************************************************************/
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 ********************************************************************/
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#include <p18cxxx.h>
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#include <p18cxxx.h>
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#include <EEaccess.h>
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#include <EEaccess.h>
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- 
 
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/*
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*   Function: EERead
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*
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*   Input:  WORD address to read from.
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*   Output: Byte read.
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*   Pre-conditions: none
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*   Affects: none.
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*   Depends: none.
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*/
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BYTE EERead(WORD addr)
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BYTE EERead(WORD addr)
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{
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{
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    EEADRH=(BYTE)(addr>>8);
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    EEADRH=(BYTE)(addr>>8);
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    EEADR=(BYTE)(addr & 0xFF);
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    EEADR=(BYTE)(addr & 0xFF);
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    EECON1bits.EEPGD=0;
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    EECON1bits.EEPGD=0;
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    EECON1bits.CFGS=0;
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    EECON1bits.CFGS=0;
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    EECON1bits.RD=1;
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    EECON1bits.RD=1;
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    return EEDATA; 
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    return EEDATA; 
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}
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}
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- 
 
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/*
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*   Function: EEWrite
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*
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*   Input:  WORD address to write to and BYTE data to write.
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*   Output: none.
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*   Pre-conditions: none
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*   Affects: none.
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*   Depends: none.
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*/
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void EEWrite(WORD addr,BYTE data)
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void EEWrite(WORD addr,BYTE data)
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{
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{
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    PIR2bits.EEIF=0;
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    PIR2bits.EEIF=0;
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    EEADRH=(BYTE)(addr>>8);
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    EEADRH=(BYTE)(addr>>8);
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    EEADR=(BYTE)(addr & 0xFF);
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    EEADR=(BYTE)(addr & 0xFF);
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    EEDATA=data;
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    EEDATA=data;
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    EECON1bits.EEPGD=0;
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    EECON1bits.EEPGD=0;
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    EECON1bits.CFGS=0;
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    EECON1bits.CFGS=0;
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    EECON1bits.WREN=1;
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    EECON1bits.WREN=1;
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    INTCONbits.GIE=0;
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    INTCONbits.GIE=0;
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    EECON2=0x55;
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    EECON2=0x55;
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    EECON2=0xAA;
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    EECON2=0xAA;
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    EECON1bits.WR=1;
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    EECON1bits.WR=1;
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    INTCONbits.GIE=1;
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    INTCONbits.GIE=1;
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    while(!PIR2bits.EEIF);
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    while(!PIR2bits.EEIF);
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    EECON1bits.WREN=0;
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    EECON1bits.WREN=0;
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}
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}
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