stc15单片机内部EEPROM读写接口函数整理

stc15w系列单片机内部自带1~9k EEPROM,对于需要存储数据的项目，十分方便，而且读写也简单

以下是我整理的EEPROM接口函数，参照了stc官方例程 

eeprom.h 头文件

#ifndef EEPROM_H_

#define EEPROM_H_

#include "mydatatype.h"

#define CMD_IDLE 0

#define CMD_READ 1

#define CMD_PROGRAM 2

#define CMD_ERASE 3

#define MileageAddr 64

#define BLaddr 1024

#define BYTE unsigned char

#define WORD unsigned int

BYTE IAPreadbyte(WORD addr);

void IAPprogrambyte(WORD addr,BYTE dat);

void IAPerasesector(WORD addr);

void IAPidle();

void writeDatas(WORD addr,BYTE *pdat,BYTE n); //写入一串数据

#endif

eeprom.c文件

#include "eeprom.h"

#include "intrins.h"

#include "stc15.h"

#include "string.h"

void IAPidle()

{

IAP_CONTR = 0;
IAP_CMD = 0;
IAP_TRIG = 0;
IAP_ADDRH = 0X80;//将地址设置到非IAP区
IAP_ADDRL = 0;

}

BYTE IAPreadbyte(WORD addr) //从EEPROM指定位置读取一个字节

{
BYTE dat;
IAP_CONTR = 0X83;
IAP_CMD = CMD_READ;
IAP_ADDRL = addr;
IAP_ADDRH = addr>>8;
IAP_TRIG = 0X5A;
IAP_TRIG = 0XA5;
_nop_();
dat = IAP_DATA;
IAPidle();
return dat;

}

void IAPprogrambyte(WORD addr,BYTE dat) //写一个字节到指定位置EEPROM

{
IAP_CONTR = 0X83;
IAP_CMD = CMD_PROGRAM;
IAP_ADDRL = addr;
IAP_ADDRH = addr>>8;
IAP_DATA = dat;
IAP_TRIG = 0X5A;
IAP_TRIG = 0XA5;
_nop_();
IAPidle();

}

void IAPerasesector(WORD addr) //扇区擦除

{
IAP_CONTR = 0X83;
IAP_CMD = CMD_ERASE;
IAP_ADDRL = addr;
IAP_ADDRH = addr>>8;
IAP_TRIG = 0X5A;
IAP_TRIG = 0XA5;
_nop_();
IAPidle();

}

void writeDatas(WORD addr,BYTE *pdat,BYTE n)

{
BYTE i;
IAPerasesector(addr);
for(i=0;i<n;i++)
{
IAPprogrambyte(addr+i,pdat[i]);
}

}

我用的是stc15w408as，亲测好用