STC单片机内部FLASH读写程序

STC单片机内部FLASH读写程序(/admin/article/article_a dd.php)

电子伙伴发表于 2006-4-11 16:26:00

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//＃i nclude "STC89C51.h"

//＃i nclude

#define ERROR 0

#define OK 1

#define WAIT_TIME 0x00 //mcu clock 40mhz

//#define WAIT_TIME 0x01 //mcu clock 20mhz

//#define WAIT_TIME 0x02 //mcu clock 10mhz

//#define WAIT_TIME 0x03 //mcu clock 5mhz

#define HOUR 0x8000

#define MINUTE 0x8001

void ISP_EN(void)

{

EA = 0; // 关中断

ISP_CONTR = ISP_CONTR & 0x18; // 0001,1000

ISP_CONTR = ISP_CONTR | WAIT_TIME;

ISP_CONTR = ISP_CONTR | 0x80; // 1000,0000

}

void ISP_DI(void)

{

ISP_CONTR = ISP_CONTR & 0x7f; // 0111,1111

ISP_TRIG = 0x00;

EA = 1; // 开中断}

unsigned char Byte_read(unsigned int byte_addr)

{

ISP_ADDRH = (unsigned char)(byte_addr >> 8);

ISP_ADDRL = (unsigned char)(byte_addr & 0x00ff);

ISP_CMD = ISP_CMD & 0xf8; // 1111,1000 ISP_CMD = ISP_CMD | 0x01; //

0000,0001 字节读数据存储区

ISP_EN();

ISP_TRIG = 0x46;

ISP_TRIG = 0xb9;

_nop_();

ISP_DI();

return (ISP_DATA);

}

void Sector_erase(unsigned int Sector_addr)

{

unsigned char addre;

addre = (unsigned char)(Sector_addr >> 8); //

1111,1110,0000,0000; 取扇区地址

ISP_ADDRH = addre&0xfe;

ISP_ADDRL = 0x00;

ISP_CMD = ISP_CMD & 0xf8; // 1111,1000

ISP_CMD = ISP_CMD | 0x03; // 0000,0011 扇区擦除数据存储区

ISP_EN();

ISP_TRIG = 0x46; // 触发ISP_IAP命令ISP_TRIG = 0xb9; // 触发ISP_IAP命令 _nop_();

ISP_DI();

}

void Byte_program(unsigned int byte_addr, unsigned char DataBuf) {

ISP_ADDRH = (unsigned char)(byte_addr >> 8);

ISP_ADDRL = (unsigned char)(byte_addr & 0x00ff);

ISP_CMD = ISP_CMD & 0xf8; // 1111,1000

ISP_CMD = ISP_CMD | 0x02; // 0000,0010 字节编程

数据存储区

ISP_DATA = DataBuf;

ISP_EN();

ISP_TRIG = 0x46; // 触发ISP_IAP命令ISP_TRIG = 0xb9; // 触发ISP_IAP命令_nop_();

ISP_DI();

}

unsigned char ByteProgramVerify(unsigned int byte_addr, unsigned char DataBuf)

{

ISP_ADDRH = (unsigned char)(byte_addr >> 8);

ISP_ADDRL = (unsigned char)(byte_addr & 0x00ff);

ISP_CMD = ISP_CMD & 0xf8; // 1111,1000

ISP_CMD = ISP_CMD | 0x02; // 0000,0010 字节编程数据存储区

ISP_DATA = DataBuf;

ISP_EN();

ISP_TRIG = 0x46;

ISP_TRIG = 0xb9;

_nop_();

ISP_DATA = 0x00;

ISP_CMD = ISP_CMD & 0xf8; // 1111,1000 ISP_CMD = ISP_CMD | 0x01; // 0000,0001

ISP_TRIG = 0x46; // 触发ISP_IAP命令ISP_TRIG = 0xb9; // 触发ISP_IAP命令_nop_();

ISP_DI();

if(ISP_DATA==DataBuf) return OK;

else return ERROR;

}