请教，编译出现问题！！

winterfell

..\OBJ\USART.axf: Error: L6218E: Undefined symbol delay_init() (referred from main.o).
..\OBJ\USART.axf: Error: L6218E: Undefined symbol NVIC_Configuration() (referred from main.o).
..\OBJ\USART.axf: Error: L6218E: Undefined symbol delay_ms(unsigned short) (referred from main.o).
..\OBJ\USART.axf: Error: L6218E: Undefined symbol uart2_init(unsigned) (referred from rs232.o).
..\OBJ\USART.axf: Error: L6218E: Undefined symbol uart3_init(unsigned) (referred from rs232.o).
..\OBJ\USART.axf: Error: L6218E: Undefined symbol uart4_init(unsigned) (referred from rs232.o).
..\OBJ\USART.axf: Not enough information to list image symbols.
..\OBJ\USART.axf: Finished: 1 information, 0 warning and 6 error messages

请问是什么原因？

头文件已加。

_tank_

回复【楼主位】winterfell:
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库文件路径配置了吗

_tank_

回复【2楼】_tank_:
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有把rs232.c添加到工程里吗

winterfell

回复【3楼】_tank_:
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以上两点核查过。都已添加。