(2)外部、定时器中断\board\inc\delay.h
...................\.....\...\key.h
...................\.....\...\led.h
...................\.....\...\timer.h
...................\.....\src\delay.c
...................\.....\...\key.c
...................\.....\...\led.c
...................\.....\...\timer.c
...................\inc\main.h
...................\...\stm32f4xx_conf.h
...................\...\stm32f4xx_it.h
...................\proj\JLinkLog.txt
...................\....\JLinkSettings.ini
...................\....\startup_stm32f4xx.s
...................\....\test.plg
...................\....\test.uvgui.Administrator
...................\....\test.uvgui_Administrator.bak
...................\....\test.uvopt
...................\....\test.uvproj
...................\....\test_Target 1.dep
...................\....\test_uvopt.bak
...................\....\test_uvproj.bak
...................\src\main.c
...................\...\stm32f4xx_it.c
...................\...\system_stm32f4xx.c
...................\board\inc
...................\.....\src
...................\proj\output
...................\board
...................\inc
...................\proj
...................\src
(2)外部、定时器中断