About the read and write operation method of MSP430-Flash exceeding 64K

About the read and write operation method of MSP430-Flash exceeding 64K

#include "msp430xG46x.h"  

void WriteFlashErrorNum(void);  

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

//Function: Read data from flash, just need to give the first address and the number of data to be retrieved  

// Input: waddr is the address of the flash, length is the data length  

// Output: None  

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

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++);  

    }  

  }  

}  

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

//Function: segment erase;  

//Date: 2006.12.13  

// Input: waddr is the address of the flash,  

// Output: None  

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

//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  

      _UNITE();  

    }  

  }  

}  

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

//Function: write data to flash;  

//Date: 2006.12.13  

// Input: waddr is the address of the flash, length is the data length, *buf is the pointer to the data  

// Output: None  

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

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)) // Determine whether the read data is equivalent to the written data  

          {    

            ErrorFlag = 1; //Write flash operation error flag  

            ErrorFlashNum ++ ;  

          }    

          waddr++;buf++;  

        }  

        while(FCTL3 & BUSY);  

        FCTL1 = FWKEY;  

        FCTL3 = FWKEY + LOCK;                     // Reset LOCK bit  

        _UNITE();  

        if(ErrorFlag == 1) WriteFlashErrorNum();  

      }  

    }  

    return ErrorFlag;  

}