关于MSP430-Flash超过64K的读写操作方法 -

关于MSP430-Flash超过64K的读写操作方法

本文引用地址: http://www.21ic.com/app/mcu/201806/764606.htm

#include "msp430xG46x.h"

void WriteFlashErrorNum(void);

//----------------------------------------------------------------------

//功能：从flash中读出数据，只需给出首地址和取出数据的数量

//输入：waddr为flash的地址，length为数据长度

//输出：无

//----------------------------------------------------------------------

void ReadFlash(unsigned long int waddr,unsigned int length)

{

unsigned char i=0;

if(FlashMangleFlag==0)

{

while(FCTL3 & BUSY);

if(length>64) length=64;

while(length--)

{

Internal_flashdata[i++]=__data20_read_char(waddr++);

}

}

}

//----------------------------------------------------------------------

//功能：段擦除；

//日期：2006.12.13

//输入：waddr为flash的地址，

//输出：无

//----------------------------------------------------------------------

//void EraseFlashOneBlock(unsigned long int waddr)

void EraseFlash(unsigned long int waddr)

{

if(FlashMangleFlag==0)

{

if((waddr>=0x1f400) && (waddr<0x20000))

{

while(FCTL3 & BUSY);

_DINT();

FCTL2 = FWKEY + FSSEL1 + FN4;

FCTL3 = FWKEY; // Clear Lock bit

FCTL1 = FWKEY + ERASE; // Set Erase bit

__data20_write_char(waddr,0); // Dummy write to erase Flash segment

while(FCTL3 & BUSY);

FCTL3 = FWKEY + LOCK; // Reset LOCK bit

_EINT();

}

}

}

//----------------------------------------------------------------------

//功能：将数据写入flash；

//日期：2006.12.13

//输入：waddr为flash的地址，length为数据长度，*buf为指向数据的指针

//输出：无

//----------------------------------------------------------------------

unsigned char WriteFlash(unsigned long int waddr,unsigned char *buf,unsigned int length)

{

unsigned int i;

unsigned char temp,ErrorFlag = 0;

if(FlashMangleFlag==0)

{

if((waddr>=0x1f400) && (waddr<0x20000))

{

while(FCTL3 & BUSY);

_DINT();

FCTL2 = FWKEY + FSSEL1 + FN4;

FCTL3 = FWKEY; // Clear Lock bit

FCTL1 = FWKEY + WRT; // Set WRT bit for write operation

for(i=0;i

{

__data20_write_char(waddr,*buf); // Write value to flash

temp = __data20_read_char(waddr); // Read one byte

if(temp!=(*buf)) // 判断读出的数据和写入的数据是否相当

{

ErrorFlag = 1; //写入flash操作错误标志

ErrorFlashNum ++ ;

}

waddr++;buf++;

}

while(FCTL3 & BUSY);

FCTL1 = FWKEY;

FCTL3 = FWKEY + LOCK; // Reset LOCK bit

_EINT();

if(ErrorFlag == 1) WriteFlashErrorNum();

}

}

return ErrorFlag;

}