代码解读

Eatun

这段代码怎么解读呀,求大神指点


/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Uncomment the line below to expanse the "assert_param" macro in the
   Standard Peripheral Library drivers code */
/* #define USE_FULL_ASSERT    1 */

/* Exported macro ------------------------------------------------------------*/
#ifdef  USE_FULL_ASSERT

/**
  * @brief  The assert_param macro is used for function's parameters check.
  * @param  expr: If expr is false, it calls assert_failed function which reports
  *         the name of the source file and the source line number of the call
  *         that failed. If expr is true, it returns no value.
  * @retval None
  */
  #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
/* Exported functions ------------------------------------------------------- */
  void assert_failed(uint8_t* file, uint32_t line);
#else
  #define assert_param(expr) ((void)0)
#endif /* USE_FULL_ASSERT */

#endif /* __STM32F10x_CONF_H */

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/

fire

断言，用于检测参数的，如果参数出错就打印出错文件的名称和所在行。

Eatun

fire 发表于 2016-12-26 11:51
断言，用于检测参数的，如果参数出错就打印出错文件的名称和所在行。

在哪里被打印出来呀,能给我讲讲他的逻辑吗?