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keil4 调试问题 希望大家帮小弟解决

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Build target 'key1'
compiling core_cm3.c...
compiling system_stm32f10x.c...
compiling stm32f10x_gpio.c...
compiling stm32f10x_rcc.c...
compiling main.c...
compiling stm32f10x_it.c...
compiling bsp_led.c...
compiling bsp_key.c...
compiling bsp_usart1.c...
linking...
..\..\Output\Template.axf: Error: L6218E: Undefined symbol NVIC_Init (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol NVIC_PriorityGroupConfig (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_Cmd (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_GetFlagStatus (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_ITConfig (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_Init (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_ReceiveData (referred from bsp_usart1.o).
..\..\Output\Template.axf: Error: L6218E: Undefined symbol USART_SendData (referred from bsp_usart1.o).
Target not created


这个要怎么解决啊 小弟新手

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