stm32 官方例子main函数最后一段代码#ifdef USE_FULLASSERT

代码如下：

#ifdef USE_FULL_ASSERT

/**

* @brief Reports the name of the source file and the source line number

* where the assert_param error has occurred.

* @param file: pointer to the source file name

* @param line: assert_param error line source number

* @retval None

*/

void assert_failed(uint8_t* file, uint32_t line)

{

/* User can add his own implementation to report the file name and line number,

ex: printf("Wrong parameters value: file %s on line %drn", file, line) */

/* Infinite loop */

while(1)

{

}

}

#endif

调试用的。在stm32f10x_conf.h文件中，有如下宏定义

#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 */

如果你定义了USE_FULL_ASSERT

就可以在assert_failed，加入：

printf("Wrong parameters value: file %s on line %drn", file, line);

就可以使用assert_param(expr) 来判断当前参数是够正确，如果不正确，就会打印出错的文件，以及出错的行。

这样就可以方面调试信息了。

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