原创 带SPI接口的EEPROM 25aa080a的读写操作

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以下是.h文件

/***********************************/
/*          EEPROM头文件.h         */
/*          芯片25aa080a           */
/*            2009.08.11           */
/***********************************/
#define WRSR  0x01       //写状态寄存器
#define WRITE 0x02       //写指令
#define READ  0x03       //读指令
#define WRDI  0x04       //禁止写
#define RDSR  0x05       //读状态寄存器
#define WREN  0x06       //写使能
#define CS RA0          //片选

extern void WRStatus();
extern void WRDIS();
extern unsigned char ReadFlash(unsigned char Adr_L,unsigned char Adr_H);
extern void WriteFlash(unsigned char Adr_L,unsigned char Adr_H,unsigned char BYTE);

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以下是函数文件

/***********************************/
/*          EEPROM头函数文件       */
/*          芯片25aa080a           */
/*            2009.08.11           */
/***********************************/
#include <pic.h>
#include <pic1687x.h>
#include "25aa080a.h"
void Send_Command(unsigned char CMD)
{
 SSPBUF=CMD;
 while(!SSPIF);
 SSPIF=0;
}
void WRENS()
{
 CS=0;
 Send_Command(WREN);
 CS=1;
}
void WRStatus()
{
 WRENS();
 CS=0;
 Send_Command(WRSR);
 Send_Command(0x00);
 CS=1;
}
void WRDIS()
{
 CS=0;
 Send_Command(WRDI);
 CS=1;
}
 
unsigned char ReadFlash(unsigned char Adr_L,unsigned char Adr_H)
{
 unsigned char temp;
 CS=0;
 Send_Command(READ);
 Send_Command(Adr_H);
 Send_Command(Adr_L);
 Send_Command(0);
 temp=SSPBUF;
 CS=1;
 return temp;
}
void WriteFlash(unsigned char Adr_L,unsigned char Adr_H,unsigned char BYTE)
{
 WRENS();
 CS=0;
 Send_Command(WRITE);
 Send_Command(Adr_H);
 Send_Command(Adr_L);
 Send_Command(BYTE);
 CS=1;
}