YModem源码开头这几句代码作用是啥

ssssssssssss · 发表于 2022-6-20 13:35:53

本帖最后由 ssssssssssss 于 2022-6-20 13:37 编辑

<span style="background-color: rgb(255, 255, 255);">请教大家，YModem源码开头这几句代码作用是啥？好像我iap还没操作过stm32读写保护啊？？？</span>

复制代码

/* Get the number of block (4 or 2 pages) from where the user program will be loaded */
  BlockNbr = (FlashDestination - 0x08000000) >> 12;

  /* Compute the mask to test if the Flash memory, where the user program will be
   loaded, is write protected */
#if defined (STM32F10X_MD) || defined (STM32F10X_MD_VL)
  UserMemoryMask = ((uint32_t)~((1 << BlockNbr) - 1));
#else /* USE_STM3210E_EVAL */
  if (BlockNbr < 62)
  {
UserMemoryMask = ((uint32_t)~((1 << BlockNbr) - 1));
  }
  else
  {
UserMemoryMask = ((uint32_t)0x80000000);
  }
#endif /* (STM32F10X_MD) || (STM32F10X_MD_VL) */

  /* Test if any page of Flash memory where program user will be loaded is write protected */
  if ((FLASH_GetWriteProtectionOptionByte() & UserMemoryMask) != UserMemoryMask)
  {
FlashProtection = 1;
  }
  else
  {
FlashProtection = 0;
  }
请教大家，YModem源码开头这几句代码作用是啥？好像我iap还没操作过stm32读写保护啊？？？