stm32 flash 模拟eeprom 遇问题

只看该作者 · 2012-1-31 17:15

IC：STM32F103RCT6
想用片内flash存用户参数，在网上找了下，官方的没找到，在本论坛中找到一个优化的那个例程，在我的目标板上没能运行起来，不知是哪儿没改，也不知道该改哪儿，后来移到我现在的程序中，发现只要调用读函数EE_ReadVariable(VirtAddVarTab[0],&tempary[us16])，程序一点儿也不运行，直接进入void HardFaultException(void)，如果注掉读调用，一切正常，不知问题出在哪里，请高手指点下！

只看该作者 · 2012-2-1 11:05

在主函中调用这个函数程序就会一点儿也不执行
uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
{
  uint16_t ValidPage = PAGE0;
  uint16_t AddressValue = 0x5555, ReadStatus = 1;
  uint32_t Address = 0x0803e800, PageStartAddress = 0x0803e800;

  /* Get active Page for read operation */
  ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);

  /* Check if there is no valid page */
  if (ValidPage == NO_VALID_PAGE)
  {
return  NO_VALID_PAGE;
  }

  /* Get the valid Page start Address */
  PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));

  /* Get the valid Page end Address */
  //Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
  Address=CurWrAddress-2;

  /* Check each active page address starting from end */
  while (Address > (PageStartAddress + 2))
  {
/* Get the current location content to be compared with virtual address */
AddressValue = (*(__IO uint16_t*)Address);

/* Compare the read address with the virtual address */
if (AddressValue == VirtAddress)
{
   /* Get content of Address-2 which is variable value */
   *Data = (*(__IO uint16_t*)(Address - 2));

   /* In case variable value is read, reset ReadStatus flag */
   ReadStatus = 0;

   break;
}
else
{
   /* Next address location */
   Address = Address - 4;
}
  }

  /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
  return ReadStatus;
}