原创 宏晶STC单片机EEPROM读写

#include<reg51.h>
//#include<intrins.h>

#define uchar unsigned char
#define uint  unsigned int

sfr IAP_DATA=0xC2;
sfr IAP_ADDRH=0xC3;
sfr IAP_ADDRL=0xC4;
sfr IAP_CMD=0xC5;
sfr IAP_TRIG=0xC6;
sfr IAP_CONTR=0xC7;

#define CMD_IDLE  0  
#define CMD_READ  1
#define CMD_WRITE  2
#define CMD_ERASE  3

#define ENABLE_IAP  0x82

//Start address for STC12C5A60S2 series EEPROM

#define IAP_ADDRESS  0x0000

void delay(uchar n)
{
  uint x;
  while(n--)
  {
     x=0;
  while(++x);
  }
}
/*----------------------------
Disable ISP/IAP/EEPROM function
Make MCU in a safe state
----------------------------*/
void IAP_Disable()
{
   IAP_CONTR=0;
   IAP_CMD=0;
   IAP_TRIG=0;
   IAP_ADDRH=0x80;
   IAP_ADDRL=0x00;
}
/*---------------------------------------------
Read one byte from ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
Output:Flash data
--------------------------------------------*/
uchar IAP_ReadByte(unsigned int addr)
{
  uchar i;
  uchar dat;
  IAP_CONTR=ENABLE_IAP;
  IAP_CMD=CMD_READ;
  IAP_ADDRL=addr;
  IAP_ADDRH=(addr>>8);
  IAP_TRIG=0x5A;
  IAP_TRIG=0XA5;
  for(i=0;i<3;i++);
  dat=IAP_DATA;
  IAP_Disable();
  return dat;
}
/*------------------------------------------------
Write one byte to ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
dat (ISP/IAP/EEPROM data)
Output:-
------------------------------------------------*/
void IAP_WriteByte(unsigned int addr,unsigned char dat)
{
  uchar i;
  IAP_CONTR=ENABLE_IAP;
  IAP_CMD=CMD_WRITE;
  IAP_ADDRL=addr;
  IAP_ADDRH=(addr>>8);
  IAP_DATA=dat;
  IAP_TRIG=0x5A;
  IAP_TRIG=0XA5;
  for(i=0;i<3;i++);
  IAP_Disable();
}
/*---------------------------------------------------
Erase one sector area
Input: addr (ISP/IAP/EEPROM address)
Output:-
--------------------------------------------------*/
void IAP_EraseSector(unsigned int addr)
{
  unsigned char i;
  IAP_CONTR=ENABLE_IAP;
  IAP_CMD=CMD_ERASE;
  IAP_ADDRL=addr;
  IAP_ADDRH=(addr>>8);
  IAP_TRIG=0x5A;
  IAP_TRIG=0XA5;
  for(i=0;i<3;i++);
  IAP_Disable();
}

void main()
{
  uint i;
  P1=0xfe;
  delay(10);
  IAP_EraseSector(IAP_ADDRESS);
  for(i=0;i<512;i++)
  {
     if(IAP_ReadByte(IAP_ADDRESS+i)!=0xff)
    goto ERROR;
  }
  P1=0xfc;
  delay(10);
  for(i=0;i<512;i++)
  {
    IAP_WriteByte(IAP_ADDRESS+i,(unsigned char)i);
  }
  P1=0xf8;
  delay(10);
  for(i=0;i<512;i++)
  {
    if(IAP_ReadByte(IAP_ADDRESS+i)!=(unsigned char)i)
   goto ERROR;
  }
  P1=0xf0;
  while(1);
  ERROR:
       P1&=0x7f;
    while(1);
}