如何访问MSP430F5438单片机64K外的flash

2. 在Target 页面中，Data Model选项，4选中Medium或Large,
3. 解释:
- 选中SMALL只能访问64K以内的空间，以外的空间只能有内部函数访问
- 选中Medium 可以访问1M以内的空间
- 选中Large可以访问全部空间

1.F5XX 430X 
2.选择Large small medium 产生效果是改变指针变量所占字节个数.IAR中指针变量默认2个字节,选择large占用4个字节,那么指针就可以访问超过64K范围的地址.
3.可以采用IAR内部函数, */

void __data20_write_char (unsigned long __addr,
unsigned char __value);

void __data20_write_short(unsigned long __addr,
unsigned short __value);

void __data20_write_long (unsigned long __addr,
unsigned long __value);

unsigned char __data20_read_char (unsigned long __addr);
unsigned long __data20_read_long (unsigned long __addr);

5438的flash操作方法
请教MSP430F5438有关flash操作的问题，代码见下，为什么固定地址的flash没有改变？

代码:
void main(void)
{
 

  unsigned long SEGMENT = 0x20000ul;

  WriteFlash(SEGMENT);
  FlashErase(SEGMENT);

  while(1)；

   
}代码:
//擦除Flash指定地址：adr指定地址Y
void FlashErase(unsigned long pAddr)
{
  
  uchar * Flash_ptr = (uchar *)pAddr;                 
  
  _DINT();                                  
                                            
  while(BUSY & FCTL3);
  FCTL3 = FWKEY;                            
  FCTL1 = FWKEY+ERASE;                     
  *Flash_ptr = 0;                           
  while(BUSY & FCTL3);
  FCTL3 = FWKEY+LOCK;                       
  _EINT();
}代码:
//写入Flash指定地址：adr指定地址，
void WriteFlash(unsigned long pAddr)
{
  _DINT();
  unsigned int i;
  uchar * Flash_ptr = (uchar *)pAddr;       
  while (FCTL3&BUSY);
  FCTL3 = FWKEY;                         
  FCTL1 = FWKEY+WRT;                       
  for(i = 0; i < 128; i++)
  {
    *(Flash_ptr++) = record1[i]; 
    while(!(WAIT & FCTL3));                 
  }
  while (FCTL3&BUSY);
  FCTL1 = FWKEY;                           
  FCTL3 = FWKEY+LOCK;                                        
  _EINT();
}