51單片機閃存程序

ID:157285 · 發表于 2018-7-24 15:12

本帖最后由 shishistone 于 2018-7-24 15:13 編輯

#include "intrins.h"

typedef unsigned char BYTE;
typedef unsigned int WORD;

sfr IAP_DATA  = 0xe2;
sfr IAP_ADDRH = 0xe3;
sfr IAP_ADDRL = 0xe4;
sfr IAP_CMD = 0xe5;
sfr IAP_TRIG  = 0xe6;
sfr IAP_CONTR = 0xe7;
#define CMD_IDLE 0    //stand-by
#define CMD_READ 1    //byte-read
#define CMD_PROGPAM 2 //byte-program
#define CMD_ERASE 3    //sector-erase
#define ENABLE_IAP 0x81 //if sysclk<20MHz
#define IAP_ADDRESS 0x08000
void Iapidle();
BYTE IapReadByte(WORD addr);
void IapProgramByte(WORD addr,BYTE dat);
void IapEraseSector(WORD addr);
void main()
{
  WORD i;

  P1=0xfe;
  Delay(10);
  IapEraseSector(IAP_ADDRESS);
  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;
  Delay(10);
  for(i=0;i<512;i++)          //program 512 bytes data into data flash
  {
IapProgramByte(IAP_ADDRESS+i,(BYTE)i);
  }
  P1=0xf8;
  Delay(10);
  for(i=0;i<512;i++)
  {
if(IapReadByte(IAP_ADDRESS+i)!=(BYTE)i)
goto Error;
  }
  P1 = 0xf0;
  while(1);
Error:
  P1&0x7f;
  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 Iapdle()
{
  IAP_CONTR = 0;    //close IAP function
  IAP_CMD = 0;       //clear command to stand-by
  IAP_TRIG = 0;       //clear trigger register
  IAP_ADDRH = 0x80; //data ptr point to non-EEPROM area
}

ID:1 · 發表于 2018-7-24 15:29

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51單片機閃存程序

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