请教各位牛人M058S的data flash读写问题

只看该作者 · 2013-12-23 11:18

我现在用KEIL调试M058S的项目遇到一个很奇怪的问题，请各位牛人指导一下。
定义有这样的机构体：
typedef struct {
  uint8_t current;
  int16_t accZero[3];
  int16_t magZero[3];
  uint16_t flashsum;
  uint8_t checksum;
} global_conf_t;

global_conf_t  global_conf;

子函数：
//************************************************************************
void eeprom_read_block(void *__dst, uint32_t addr, uint16_t __n)
{
   uint32_t *_myDstPtr;
   uint32_t _mySrcPtr;
   uint16_t  count = __n / 4;
   uint32_t  temp;

   if((__n % 4) != 0) count += 1;

_myDstPtr =  (uint32_t *)__dst;
_mySrcPtr =  addr + 0x01f000;

SYS_UnlockReg();
_FMC_ENABLE_ISP();

while(count--)
{
// *_myDstPtr =  FMC_Read((uint32_t)_mySrcPtr);
      temp =  FMC_Read((uint32_t)_mySrcPtr);    //test
*_myDstPtr = temp;    // test
_myDstPtr++;
_mySrcPtr += 4;
}

    _FMC_DISABLE_ISP();
SYS_LockReg();
}

//*************************************************************************
void  eeprom_write_block(const void *__src, uint32_t addr, uint16_t __n)
{

uint32_t _myDstPtr;
uint32_t *_mySrcPtr;
uint16_t count = __n / 4;

if((__n % 4) != 0) count += 1;

_myDstPtr  =  addr + 0x01f000;
_mySrcPtr  = (uint32_t *)__src;

SYS_UnlockReg();
_FMC_ENABLE_ISP();
if(addr < 512)
   FMC_Erase(0x01f000);
else if(addr < 1024)
   FMC_Erase(0x01f000 + 512);
else if(addr < 1536)
   FMC_Erase(0x01f000 + 1024);
else if(addr < 2048)
   FMC_Erase(0x01f000 + 1536);
else if(addr < 2560)
   FMC_Erase(0x01f000 + 2048);
else if(addr < 3072)
   FMC_Erase(0x01f000 + 2560);

while(count--)
{
   FMC_Write((uint32_t)_myDstPtr, *_mySrcPtr++);
   _myDstPtr += 4;

}
_FMC_DISABLE_ISP();
SYS_LockReg();
}

在main函数中只要调用以下其中一个函数，都会有异常出现！
  eeprom_read_block((void *)&global_conf, 0, sizeof(global_conf));

  eeprom_write_block((const void*)&global_conf, 0, sizeof(global_conf));

比如调用eeprom_read_block((void *)&global_conf, 0, sizeof(global_conf));
跟踪发现
运行到 *_myDstPtr = temp;    // test
这里的时候马上会异常跳到这里：startup_M051Series.s中
HardFault_Handler_Ret
ENDIF

            B    .
            ENDP

请叫各位大侠是怎么回事呢？