【求助】stm32 SYSTEM文件夹编译错误 error#35

照着原子的视频自己写了跑马灯的寄存器程序，把SYSTEM文件夹搬过来后，编译不成功。

照着原子的视频自己写了跑马灯的寄存器程序，把SYSTEM文件夹搬过来后，编译不成功。
compiling delay.c...
..\SYSTEM\sys\stm32f4xx.h(102): error:  #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
   #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
..\SYSTEM\delay\delay.c: 0 warnings, 1 error
compiling usart.c...
..\SYSTEM\sys\stm32f4xx.h(102): error:  #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
   #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
..\SYSTEM\usart\usart.c: 0 warnings, 1 error
compiling sys.c...
..\SYSTEM\sys\stm32f4xx.h(102): error:  #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
   #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
..\SYSTEM\sys\sys.c: 0 warnings, 1 error
compiling main.c...
..\SYSTEM\sys\stm32f4xx.h(102): error:  #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
   #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
..\USER\main.c: 0 warnings, 1 error
compiling LED.C...
..\SYSTEM\sys\stm32f4xx.h(102): error:  #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
   #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
..\HARDWARE\LED\LED.C: 0 warnings, 1 error
"..\OBJ\LED_light.axf" - 5 Error(s), 0 Warning(s).
Target not created.