例程（2）按键输入\USER\STM32F10x.s
.................\....\test.c
.................\....\TEST.plg
.................\....\TEST_Target 1.dep
.................\....\STM32F10x.lst
.................\....\test.d
.................\....\test.crf
.................\....\delay.d
.................\....\delay.crf
.................\....\delay.o
.................\....\sys.d
.................\....\sys.crf
.................\....\sys.o
.................\....\usart.d
.................\....\usart.crf
.................\....\usart.o
.................\....\led.d
.................\....\led.crf
.................\....\led.o
.................\....\key.d
.................\....\key.crf
.................\....\TEST.tra
.................\....\TEST.lnp
.................\....\TEST.map
.................\....\TEST.htm
.................\....\TEST.hex
.................\....\TEST_Uv2.Bak
.................\....\STM32F10x.o
.................\....\TEST_sct.Bak
.................\....\TEST.sct
.................\....\TEST_Opt.Bak
.................\....\key.o
.................\....\test.o
.................\....\JLinkLog.txt
.................\....\ExtDll.iex
.................\....\TEST.axf
.................\....\TEST.Uv2
.................\....\TEST.Opt
.................\SYSTEM\delay\delay.c
.................\......\.....\delay.h
.................\......\sys\sys.c
.................\......\...\sys.h
.................\......\usart\usart.c
.................\......\.....\usart.h
.................\HARDWARE\KEY\key.c
.................\........\...\key.h
.................\........\LED\led.c
.................\........\...\led.h
.................\SYSTEM\delay
.................\......\sys
.................\......\usart
.................\HARDWARE\KEY
.................\........\LED
.................\USER
.................\SYSTEM
.................\HARDWARE
例程（2）按键输入