MDK报错：Undefined symbol assert_failed报错解决策略

MDK报错：Undefined symbol assert_failed报错解决策略

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• 🎯🪕在全网搜索相关MDK编译报错:Error: L6218E: Undefined symbol assert_param (referred from xxx.o).

✨有些问题看似很简单，可能产生的问题是由于不经意的细节原因导致。引起报错的问题有很多种可能，没有放之四海皆准的解决方案。

• 🌿提供的解决问题的可能方案一：添加宏定义USE_STDPERIPH_DRIVER
  
• 🌿提供的解决问题的可能方案二：没有将相对应的驱动头文件(.h)路径包含进来或者是源文件（.c）添加到工程中。

• 🔖这里针对的是具体的驱动文件或驱动头文件。
  
  

• 🌿提供的解决问题的可能方案三：在main.c文件中，补充下面的void assert_failed()断言报错函数：

#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 CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

✨很多外部导入的工程源码，添加完标准库文件后，编译报此错误，往往可能是忽略标准库驱动文件中定义了此断言assert_failed函数，却没有写实现的地方，才会出现有调用assert_param宏的驱动文件中报错。

/* Exported macro ------------------------------------------------------------*/
#define USE_FULL_ASSERT#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)0U : assert_failed((uint8_t *)__FILE__, __LINE__))/* Exported functions ------------------------------------------------------- */void assert_failed(uint8_t *file, uint32_t line);
#else#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */