AT24C02,04,08... 系列MC51单片机驱动程序

头文件：

 

#ifndef _AT24C_EEPROM_Driver_H#define _AT24C_EEPROM_Driver_H

#include <reg52.h>#include <intrins.h>#include "IIC_BUS_Driver.h" //Depended I2C Bus Driver

 

#define uchar unsigned char#define ushort unsigned short#define uint unsigned int

 

//#define AT24C_EEPROM_ADDRESS 0x00  /*定义IC地址*/

typedef struct _tag_iic_at24c_info_hdr{ uchar  ic_address; //器件地址 ushort size;  //空间大小 ushort data_address;//当前指针位置}IIC_AT24C_HEADER, *LPIIC_AT24C_HEADER;

 

enum AT24C_SEEK_TYPE{ SEEK_BEGIN = 0, SEEK_CUR = 1, SEEK_END = 2,};

 

bit AT24C_Init(LPIIC_AT24C_HEADER lpHdr, uchar ic_address, ushort size);bit AT24C_Write(LPIIC_AT24C_HEADER lpHdr, uchar *buffer, uchar count);bit AT24C_WriteByte(LPIIC_AT24C_HEADER lpHdr, uchar buf);bit AT24C_Read(LPIIC_AT24C_HEADER lpHdr, uchar *buffer, uchar count);uchar AT24C_ReadByte(LPIIC_AT24C_HEADER lpHdr);bit AT24C_Seek(LPIIC_AT24C_HEADER lpHdr, short address, uchar seek_type);

#endif

源文件：

#include "AT24C_EEPROM_Driver.h"#include "IIC_BUS_Driver.h"

bit AT24C_Init(LPIIC_AT24C_HEADER lpHdr, uchar ic_address, ushort size){ if (lpHdr == 0)  return 0;

 lpHdr->ic_address = ic_address; lpHdr->size = size; lpHdr->data_address = 1;

 return 1;}

bit AT24C_Write(LPIIC_AT24C_HEADER lpHdr, uchar *buffer, uchar count){ if (lpHdr == 0)  return 0;

 if (lpHdr->data_address + count >= lpHdr->size)  return 0;

 if (ISendStr(lpHdr->ic_address, lpHdr->data_address, buffer, count) == 0)  return 0;

 lpHdr->data_address += count;

 return 1;}

bit AT24C_WriteByte(LPIIC_AT24C_HEADER lpHdr, uchar buf){ if (lpHdr == 0)  return 0;

 if (lpHdr->data_address + 1 >= lpHdr->size)  return 0;

 if (ISendByte(lpHdr->ic_address, lpHdr->data_address, buf) == 0)  return 0;

 lpHdr->data_address++;

 return 1;}

bit AT24C_Read(LPIIC_AT24C_HEADER lpHdr, uchar *buffer, uchar count){ if (lpHdr == 0)  return 0;

 if (lpHdr->data_address + count >= lpHdr->size)  return 0;

 if (IRecvStr(lpHdr->ic_address, lpHdr->data_address, buffer, count) == 0)  return 0;

 lpHdr->data_address += count;

 return 1;}

uchar AT24C_ReadByte(LPIIC_AT24C_HEADER lpHdr){ uchar bk;

 if (lpHdr == 0)  return 0;

 if (lpHdr->data_address + 1 >= lpHdr->size)  return 0;

 if (IRecvByte(lpHdr->ic_address, lpHdr->data_address, &bk) == 0)  return 0; lpHdr->data_address++;

 return bk;}

bit AT24C_Seek(LPIIC_AT24C_HEADER lpHdr, short address, uchar seek_type){ if (lpHdr == 0)  return 0;

 if (seek_type == SEEK_BEGIN) {  if (address < 0)   lpHdr->data_address = 0x01;  else  {   lpHdr->data_address = address;  } } else if (seek_type == SEEK_END) {  if (address < 0)   return 0;  else if (address >= lpHdr->size)   return 0;

  lpHdr->data_address = lpHdr->size - address; } else if (seek_type == SEEK_CUR) {  if (address < 0)  {   if ((-address) > lpHdr->data_address)    return 0;  }  else  {   if (lpHdr->data_address + address >= lpHdr->size)    return 0;  }

  lpHdr->data_address += address; }

 return 1;}