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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
}
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51內核單片機閃存的用法.docx
2018-7-24 15:13 上傳
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12.35 KB, 下載次數: 5, 下載積分: 黑幣 -5
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