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stm32f10x_exti.h中不是定义了么？
..OBJ10HZ.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o)
...OBJ10HZ.axf: Error: L6218E: Undefined symbol EXTI_Init (referred from exti.o).
..OBJ10HZ.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o)
...OBJ10HZ.axf: Error: L6218E: Undefined symbol EXTI_Init (referred from exti.o).
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