求解一段Z-stack中的Flash 函数使用的解释

只看该作者 · 2012-3-1 15:53

void HalFlashRead(uint8 pg, uint16 offset, uint8 *buf, uint16 cnt)
{
  // Calculate the offset into the containing flash bank as it gets mapped into XDATA.
  uint8 *pData = (uint8 *)(offset + HAL_FLASH_PAGE_MAP) + ((pg % HAL_FLASH_PAGE_PER_BANK) * HAL_FLASH_PAGE_SIZE);
  uint8 memctr = MEMCTR;  // Save to restore.
#if (!defined HAL_OAD_BOOT_CODE) && (!defined HAL_OTA_BOOT_CODE)
  halIntState_t is;
#endif
  pg /= HAL_FLASH_PAGE_PER_BANK;  // Calculate the flash bank from the flash page.
#if (!defined HAL_OAD_BOOT_CODE) && (!defined HAL_OTA_BOOT_CODE)
  HAL_ENTER_CRITICAL_SECTION(is);
#endif
  // Calculate and map the containing flash bank into XDATA.
  MEMCTR = (MEMCTR & 0xF8) | pg;
  while (cnt--)
  {
*buf++ = *pData++;
  }
  MEMCTR = memctr;
#if (!defined HAL_OAD_BOOT_CODE) && (!defined HAL_OTA_BOOT_CODE)
  HAL_EXIT_CRITICAL_SECTION(is);
#endif
}

不晓得如何用。不是很明白，我用没成功，不晓得自己的读的是那段，