请问我自己写程序经常遇到这种问题我英语也不好看不太懂到底咋回事

2019-07-20 13:13发布

..OBJADC.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o).
..OBJADC.axf: Error: L6218E: Undefined symbol EXTI_GetITStatus (referred from exti.o).
..OBJADC.axf: Error: L6218E: Undefined symbol EXTI_Init (referred from exti.o).
..OBJADC.axf: Error: L6218E: Undefined symbol TIM_ClearITPendingBit (referred from timer.o).
..OBJADC.axf: Error: L6218E: Undefined symbol TIM_Cmd (referred from timer.o).
..OBJADC.axf: Error: L6218E: Undefined symbol TIM_GetITStatus (referred from timer.o).
..OBJADC.axf: Error: L6218E: Undefined symbol TIM_ITConfig (referred from timer.o).
..OBJADC.axf: Error: L6218E: Undefined symbol TIM_TimeBaseInit (referred from timer.o).

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