怎么回事，求解决

烧年

..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_Cmd (referred from usart.o).
..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_GetITStatus (referred from usart.o).
..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_ITConfig (referred from usart.o).
..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_Init (referred from usart.o).
..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_ReceiveData (referred from usart.o).
..\OBJ\EXTI.axf: Error: L6218E: Undefined symbol USART_SendData (referred from usart.o).
..\OBJ\EXTI.axf: Not enough information to list image symbols.
..\OBJ\EXTI.axf: Finished: 1 information, 0 warning and 6 error messages.

masiling

回复【楼主位】可能少了某个头文件，搜索一下看那几个符号在哪个文件 包含进去应该可以的

正点原子

串口的c文件没加进去.

烧年

回复【2楼】masiling:
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嗯，已经解决了，是usart.c忘加进去了，谢谢！！

烧年

回复【3楼】正点原子:
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是的，头脑发热忘加进去了，非常感谢！！