51 EEPROM操作模板

各个型号容量及扇区请查datasheet  修改IAP ADDRESS值即可

如下为12T单片机模板 STC89C52等···

#include "reg51.h"
#include "intrins.h"

typedef unsigned char BYTE;
typedef unsigned int WORD;

/*Declare SFR associated with the IAP */
sfr IAP_DATA    =   0xE2;           //Flash data register
sfr IAP_ADDRH   =   0xE3;           //Flash address HIGH
sfr IAP_ADDRL   =   0xE4;           //Flash address LOW
sfr IAP_CMD     =   0xE5;           //Flash command register
sfr IAP_TRIG    =   0xE6;           //Flash command trigger
sfr IAP_CONTR   =   0xE7;           //Flash control register

/*Define ISP/IAP/EEPROM command*/
#define CMD_IDLE    0               //Stand-By
#define CMD_READ    1               //Byte-Read
#define CMD_PROGRAM 2               //Byte-Program
#define CMD_ERASE   3               //Sector-Erase

/*Define ISP/IAP/EEPROM operation const for IAP_CONTR*/
//#define ENABLE_IAP 0x80           //if SYSCLK<40MHz
#define ENABLE_IAP   0x81           //if SYSCLK<20MHz
//#define ENABLE_IAP x82            //if SYSCLK<10MHz
//#define ENABLE_IAP 0x83           //if SYSCLK<5MHz

//Start address for STC89C58xx EEPROM
#define IAP_ADDRESS 0x08000

void Delay(BYTE n);
void IapIdle();
BYTE IapReadByte(WORD addr);
void IapProgramByte(WORD addr, BYTE dat);
void IapEraseSector(WORD addr);

void main()
{
    WORD i;

    P1 = 0xfe;                      //1111,1110 System Reset OK
    Delay(10);                      //Delay
    IapEraseSector(IAP_ADDRESS);    //Erase current sector
    for (i=0; i<512; i++)           //Check whether all sector data is FF
    {
        if (IapReadByte(IAP_ADDRESS+i) != 0xff)
            goto Error;             //If error, break
    }
    P1 = 0xfc;                      //1111,1100 Erase successful
    Delay(10);                      //Delay
    for (i=0; i<512; i++)           //Program 512 bytes data into data flash
    {
        IapProgramByte(IAP_ADDRESS+i, (BYTE)i);
    }
    P1 = 0xf8;                      //1111,1000 Program successful
    Delay(10);                      //Delay
    for (i=0; i<512; i++)           //Verify 512 bytes data
    {
        if (IapReadByte(IAP_ADDRESS+i) != (BYTE)i)
            goto Error;             //If error, break
    }
    P1 = 0xf0;                      //1111,0000 Verify successful
    while (1);
Error:
    P1 &= 0x7f;                     //0xxx,xxxx IAP operation fail
    while (1);
}

/*----------------------------
Software delay function
----------------------------*/
void Delay(BYTE n)
{
    WORD x;

    while (n--)
    {
        x = 0;
        while (++x);
    }
}

/*----------------------------
Disable ISP/IAP/EEPROM function
Make MCU in a safe state
----------------------------*/
void IapIdle()
{
    IAP_CONTR = 0;                  //Close IAP function
    IAP_CMD = 0;                    //Clear command to standby
    IAP_TRIG = 0;                   //Clear trigger register
    IAP_ADDRH = 0x80;               //Data ptr point to non-EEPROM area
    IAP_ADDRL = 0;                  //Clear IAP address to prevent misuse
}

/*----------------------------
Read one byte from ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
Output:Flash data
----------------------------*/
BYTE IapReadByte(WORD addr)
{
    BYTE dat;                       //Data buffer

    IAP_CONTR = ENABLE_IAP;         //Open IAP function, and set wait time
    IAP_CMD = CMD_READ;             //Set ISP/IAP/EEPROM READ command
    IAP_ADDRL = addr;               //Set ISP/IAP/EEPROM address low
    IAP_ADDRH = addr >> 8;          //Set ISP/IAP/EEPROM address high
    IAP_TRIG = 0x46;                //Send trigger command1 (0x46)
    IAP_TRIG = 0xb9;                //Send trigger command2 (0xb9)
    _nop_();                        //MCU will hold here until ISP/IAP/EEPROM operation complete
    dat = IAP_DATA;                 //Read ISP/IAP/EEPROM data
    IapIdle();                      //Close ISP/IAP/EEPROM function

    return dat;                     //Return Flash data
}

/*----------------------------
Program one byte to ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
       dat (ISP/IAP/EEPROM data)
Output:-
----------------------------*/
void IapProgramByte(WORD addr, BYTE dat)
{
    IAP_CONTR = ENABLE_IAP;         //Open IAP function, and set wait time
    IAP_CMD = CMD_PROGRAM;          //Set ISP/IAP/EEPROM PROGRAM command
    IAP_ADDRL = addr;               //Set ISP/IAP/EEPROM address low
    IAP_ADDRH = addr >> 8;          //Set ISP/IAP/EEPROM address high
    IAP_DATA = dat;                 //Write ISP/IAP/EEPROM data
    IAP_TRIG = 0x46;                //Send trigger command1 (0x46)
    IAP_TRIG = 0xb9;                //Send trigger command2 (0xb9)
    _nop_();                        //MCU will hold here until ISP/IAP/EEPROM operation complete
    IapIdle();
}

/*----------------------------
Erase one sector area
Input: addr (ISP/IAP/EEPROM address)
Output:-
----------------------------*/
void IapEraseSector(WORD addr)
{
    IAP_CONTR = ENABLE_IAP;         //Open IAP function, and set wait time
    IAP_CMD = CMD_ERASE;            //Set ISP/IAP/EEPROM ERASE command
    IAP_ADDRL = addr;               //Set ISP/IAP/EEPROM address low
    IAP_ADDRH = addr >> 8;          //Set ISP/IAP/EEPROM address high
    IAP_TRIG = 0x46;                //Send trigger command1 (0x46)
    IAP_TRIG = 0xb9;                //Send trigger command2 (0xb9)
    _nop_();                        //MCU will hold here until ISP/IAP/EEPROM operation complete
    IapIdle();
}

如下为1T单片机模板（12C5AS60等）

#include <reg52.h>
#include "intrins.h"

typedef unsigned char byte;
typedef unsigned int word;

/* Declare SFR associated with the IAP */
sfr IAP_DATA  = 0xC2;  //Flash data register
sfr IAP_ADDRH = 0xC3;  //Flash address HIGH
sfr IAP_ADDRL = 0xC4;  //Flash address LOW
sfr IAP_CMD   = 0xC5;  //Flash command register
sfr IAP_TRIG  = 0xC6;  //Flash command trigger
sfr IAP_CONTR = 0xC7;  //Flash control register

/* Define ISP/IAP/EEPROM command */
#define CMD_IDLE 0	   //Stand-By
#define CMD_READ 1	   //Byte-Read
#define CMD_PROGRAM 2  //Byte-Program
#define CMD_ERASE 3	   //Sector-Erase

/* Define ISP/IAP/EEPROM operation const for IAP_CONTR */
#define ENABLE_IAP 0x80	 //if SYSCLK < 30MHz
#define ENABLE_IAP 0x81	 //if SYSCLK < 24MHz
#define ENABLE_IAP 0x82	 //if SYSCLK < 20MHz
#define ENABLE_IAP 0x83	 //if SYSCLK < 12MHz
#define ENABLE_IAP 0x84	 //if SYSCLK < 6MHz
#define ENABLE_IAP 0x85	 //if SYSCLK < 3MHz
#define ENABLE_IAP 0x86	 //if SYSCLK < 2MHz
#define ENABLE_IAP 0x87	 //if SYSCLK < 1MHz

//Start address for STC12C5201AD series EEPROM
#define IAP_ADDRESS 0x0000

void Delay(byte n)
{
	word x;
	while(n--)
	{
		x = 0;
		while(++x);
	}
}

/* Disable ISP/IAP/EEPROM function Make MCU in a safe state */

void IapIdle()
{
	 IAP_CONTR = 0;		   //close IAP function
	 IAP_CMD = 0;		   //clear command to standby
	 IAP_TRIG = 0;		   //clear tirgger register
	 IAP_ADDRH = 0x80;	   //data ptr point to non EEPROM area
	 IAP_ADDRL = 0;		   //clear IAP address to prevent mususe
}

/* read one byte from isp/iap/eeprom area input:addr(isp iap eeprom address) output:flash data */
byte IapReadByte(word addr)
{
	byte dat;

	IAP_CONTR = ENABLE_IAP; //Open IAP function and set wait time
	IAP_CMD = CMD_READ;	    //Set ISAP READ command
	IAP_ADDRL = addr;       //Set ISP address low
	IAP_ADDRH = addr >> 8;  //Set IAP address high
	IAP_TRIG = 0x5a;        //Send trigger command1(0x5a)
	IAP_TRIG = 0xa5;        //Send trigger command2(0xa5)
	_nop_();				//MCU will hold here until IAP operation complete

	dat = IAP_DATA; 		//Read IAP EEPROM data
	IapIdle();				//Close ISP function

	return dat;				//Return Flash data
}

/* Program one byte to ISP area   Input:addr (address)  dat(data)  Output:- */
void IapProgramByte(word addr, byte dat)
{
	IAP_CONTR = ENABLE_IAP;		//Open IAP function, and set wait time
	IAP_CMD   = CMD_PROGRAM;    //Set EEPROM PROGRAM command
	IAP_ADDRL = addr;
	IAP_ADDRH = addr >> 8;
	IAP_DATA = dat;
	IAP_TRIG = 0x5a;
	IAP_TRIG = 0xa5;
	_nop_();

	IapIdle();
}

/* Erase one sector area Input:addr */
void IapEraseSector(word addr)
{
	IAP_CONTR = ENABLE_IAP;
	IAP_CMD = CMD_ERASE;
	IAP_ADDRL = addr;
	IAP_ADDRH = addr >> 8;
	IAP_TRIG = 0x5a;
	IAP_TRIG = 0xa5;
	_nop_();

	IapIdle();
}



int main()
{
	word i;

	P1 = 0xfe;
	Delay(10);
	IapEraseSector(IAP_ADDRESS);

	for(i = 0; i < 512; ++i)
	{
		if(IapReadByte(IAP_ADDRESS + i) != 0xff)
		{}	
	}

	P1 = 0xfc;
	Delay(10);
	for(i = 0; i < 512; ++i)
	{
		IapProgramByte(IAP_ADDRESS + i, (byte)i);
	}
	
	P1 = 0xf8;
	Delay(10);
	for(i = 0; i < 512; ++i)
	{
		if(IapReadByte(IAP_ADDRESS + i) != (byte)i)
		{}
	}

	P1 = 0xf0;
	while(1);

	return 0;
}