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。
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 */