AVR internal EEPROM read and write function EEPROM.H

#pragma used+

///Write single byte EEPROM

void EEPROM_write(unsigned int uiAddress, unsigned char ucData);

///Read single byte EEPROM

unsigned char EEPROM_read(unsigned int uiAddress);

///Write double byte EEPROM

void EEPROM_write2(unsigned int uiAddress, unsigned int ucData);

///Read double byte EEPROM

unsigned int EEPROM_read2(unsigned int uiAddress);

///Read 4 bytes EEPROM

unsigned long EEPROM_read4(unsigned int uiAddress);

///Write 4 bytes EEPROM

void EEPROM_write4(unsigned int uiAddress, unsigned long ucData);

#pragma used-

#pragma library eeprom.lib

EEPROM.C

//#include "eeprom.h"

/* EEPROM Control Register */

#define EERIE 3

#define EEMWE 2

#define EEWE 1

#define EERE 0

#if funcused EEPROM_write

///Write single byte EEPROM

void EEPROM_write(unsigned int uiAddress, unsigned char ucData)

{

//#asm("cli")

////* Wait for the last write operation to end

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress;

EEDR = ucData;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<

//#asm("sei")

}

#endif

#if funcused EEPROM_read

///Read single byte EEPROM

unsigned char EEPROM_read(unsigned int uiAddress)

{

#asm("cli")

///* Wait for the last write operation to end

while(EECR & (1<///* Set the address register */

EEAR = uiAddress;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

return EEDR;

//#asm("sei")

}

#endif

#if funcused EEPROM_read2

///Read double byte EEPROM

unsigned int EEPROM_read2(unsigned int uiAddress)

{ unsigned int ucdata;

// #asm("cli")

///* Wait for the last write operation to end

while(EECR & (1<///* Set the address register */

EEAR = uiAddress+1;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata = EEDR;

ucdata =ucdata<<8;

while(EECR & (1<///* Set the address register */

EEAR = uiAddress;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata |= EEDR;

return ucdata;

//#asm("sei")

}

#endif

#if funcused EEPROM_write2

///Write double byte EEPROM

void EEPROM_write2(unsigned int uiAddress, unsigned int ucData)

{

//#asm("cli")

////* Wait for the last write operation to end

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress;

EEDR = ucData & 0x00ff;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress+1;

EEDR = (ucData & 0xff00)>>8;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<//#asm("sei")

}

#endif

#if funcused EEPROM_read4

///Read 4 bytes EEPROM

unsigned long EEPROM_read4(unsigned int uiAddress)

{ unsigned long ucdata;

// #asm("cli")

///* Wait for the last write operation to end

while(EECR & (1<///* Set the address register */

EEAR = uiAddress+3;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata = EEDR;

ucdata =ucdata<<8;

EEAR = uiAddress+2;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata |= EEDR;

ucdata =ucdata<<8;

EEAR = uiAddress+1;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata |= EEDR;

ucdata =ucdata<<8;

while(EECR & (1<///* Set the address register */

EEAR = uiAddress;

///* Set EERE to start read operation

EECR |= (1<///* Return data from data register

ucdata |= EEDR;

return ucdata;

//#asm("sei")

}

#endif

#if funcused EEPROM_write4

///Write 4 bytes EEPROM

void EEPROM_write4(unsigned int uiAddress, unsigned long ucData)

{

//#asm("cli")

////* Wait for the last write operation to end

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress;

EEDR = ucData & 0x000000ff;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<

ucData = ucData>>8;

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress+1;

EEDR = ucData & 0x000000ff;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<

ucData = ucData>>8;

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress+2;

EEDR = ucData & 0x000000ff;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<

ucData = ucData>>8;

while(EECR & (1<////* Set up address and data registers

EEAR = uiAddress+3;

EEDR = ucData & 0x000000ff;

////* Set EEMWE

EECR |= (1<////* Set EEWE to start write operation

EECR |= (1<//#asm("sei")

}

#endif