STC单片机内部FLASH读写程序

//＃i nclude “STC89C51.h”

//＃i nclude

#define ERROR 0
#define OK 1

#define WAIT_TIME0x00//mcu clock 40mhz
//#define WAIT_TIME0x01//mcu clock 20mhz
//#define WAIT_TIME0x02//mcu clock 10mhz
//#define WAIT_TIME0x03//mcu clock 5mhz

#define HOUR0x8000
#define MINUTE0x8001

void ISP_EN(void)
{
EA=0;// 关中止
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; // 开中止
}

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指令
ISP_TRIG=0xb9; // 触发ISP_IAP指令
_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指令
ISP_TRIG=0xb9; // 触发ISP_IAP指令
_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指令
ISP_TRIG=0xb9; // 触发ISP_IAP指令
_nop_();

ISP_DI();

if(ISP_DATA==DataBuf)returnOK;
elsereturnERROR;
}