Use GPIO to check line sequence is correct, voltage is within reasonable range, otherwise red light and buzzer alarm.

buzzer.c
buzzer.h
ioin.c
ioin.h
ioout.c
ioout.h
JLink Regs CM3.txt
JLinkLog.txt
JLinkSettings.ini
led.c
led.h
main.c
Project.uvgui.Administrator
Project.uvgui.thinkpad
Project.uvgui_Administrator.bak
Project.uvgui_thinkpad.bak
Project.uvguix.thinkpad
Project.uvopt
Project.uvoptx
Project.uvproj.saved_uv4
Project.uvprojx
Project_uvopt.bak
Project_uvproj.bak
Project_神舟I号.dep
stm32f10x_conf.h
stm32f10x_it.c
stm32f10x_it.h
SZ_STM32F103RB_LIB.c
SZ_STM32F103RB_LIB.h
7segled.c
7segled.h

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