assert_param(IS_GPIO_ALL_PERIPH(GPIOx));   #ifdef  USE_FULL_ASSERT
  #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))

  void assert_failed(uint8_t* file, uint32_t line);
#else
  #define assert_param(expr) ((void)0)
#endif /* USE_FULL_ASSERT */
  这是什么意思？ 此帖出自小平头技术问答