Writing array of data to flash address start 0x40000 on the MSPF430F6638.

Dos anybody have any sample code showing how to first erase and then write a large amount of data values to the internal flash on a MSP430F66?

And can do it 10 times in a row?

I have code that can do it 1-3 times, but before 10 tries the firmware “jumps” to something different.

Below is my code that works 1-3 times, but never 10 times.

Suddenly the code pointer jumps to something else.

#define LogbookData      0x40000

typedef void (*FARPTR)();

//*****************************************************************************

void x_write_short(FARPTR addr, unsigned short data)

{

  __data20_write_short((unsigned long)addr, data);

  __data20_write_short((unsigned long)addr, data);

}

//******************************************************************************

void Erase_Flash_Segment(unsigned long Adr)

{

   __bic_SR_register(GIE);              // disable Global Interrupt

  FCTL3 = FWKEY;                        // Clear Lock bit

  FCTL1 = FWKEY + ERASE;                // Set Erase bit

  x_write_short((FARPTR)Adr, 0xFFFF);   // Dummy write to erase Flash To_segment

  FCTL3 = FWKEY + LOCK;                 // Reset LOCK bit

  __bis_SR_register(GIE);               // enable Global Interrupt

} 

//******************************************************************************

void Erase_Logbook_Segments(void)

{

  unsigned long Segment;

  for (Segment=0;Segment<20;Segment++)

  {

    Erase_Flash_Segment(LogbookData + (Segment*0x200));

  }

}

 //******************************************************************************

void Flash_Write_Logbook(void)

{                    

  unsigned int i;

  unsigned long Flash_Pointer;

  Erase_Logbook_Segments();

  Flash_Pointer =     LogbookData;                    // Initialize Logbook Flash pointer 

  FCTL3 = FWKEY;                                                     // Clear Lock bit

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

  Logbook_Ptr   = &Logbook.Device;               // Pointer to first byte in logbook struct  

  x_write_short((FARPTR)Flash_Pointer, 0xFFFF); // DUMMY write

  while (FCTL3 & BUSY);                                         // wait until BUSY=0

  FCTL1 = FWKEY + WRT;                                       // set write (byte) mode

  for (i=0;i<sizeof(Logbook)/sizeof(int);i++)

  {

     x_write_short((FARPTR)Flash_Pointer, Logbook_Ptr[i]);

     Flash_Pointer += 2;      

     while (FCTL3 & BUSY);                                      // wait until BUSY=0

  }

  FCTL1 = FWKEY;                                // Clear WRT bit

  FCTL3 = FWKEY + LOCK;                         // Reset LOCK bit

  while ( ! (FCTL3 & WAIT) );

}

//******************************************************************************

void Test_Flash_Logbook(void)

{

  Stop_Watchdog_Timer();

  for (i=1;i<10;i++)

  { 

    Flash_Write_Logbook();

  } 

}