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stm32 keil配置
出现这几个错误\\output\\Buzzer.axf: Error: L6218E: Undefined symbol GPIO_Init (referred from main.o)..\\output\\Buzzer.axf: Error: L6218E: Undefined symbol GPIO_PinRemapConfig (referred from main.o)..\\out
出现这几个错误\\output\\Buzzer.axf: Error: L6218E: Undefined symbol GPIO_Init (referred from main.o)..\\output\\Buzzer.axf: Error: L6218E: Undefined symbol GPIO_PinRemapConfig (referred from main.o)..\\out
