With the stm32 MCU matrix keyboard scanning procedure written in C

C
.\JLinkArm_HC6800-EM3.ini
.\Lst
.\...\LED灯闪烁.map
.\...\STM3210B-EVAL.map
.\...\STM3210E-EVAL.map
.\...\stm32f10x_vector.lst
.\...\二进制加法.map
.\...\按键.map
.\...\矩阵键盘.map
.\Obj
.\...\main.crf
.\...\main.d
.\...\main.o
.\...\stm32f10x_it.crf
.\...\stm32f10x_it.d
.\...\stm32f10x_it.o
.\...\stm32f10x_vector._ia
.\...\stm32f10x_vector.o
.\...\矩阵键盘.axf
.\...\矩阵键盘.hex
.\...\矩阵键盘.htm
.\...\矩阵键盘.lnp
.\...\矩阵键盘.plg
.\...\矩阵键盘.sct
.\...\矩阵键盘.tra
.\Project.Uv2.bak
.\Project.opt.bak
.\Project.uvopt
.\Project.uvproj
.\Project_HC6800-EM3.dep
.\Project_Opt.Bak
.\Project_STM3210E-EVAL.dep
.\Project_Uv2.Bak
.\Project_uvopt.bak
.\main.c
.\note.txt
.\platform_config.h
.\readme.txt
.\stm32f10x_conf.h
.\stm32f10x_it.c
.\stm32f10x_it.h
.\stm32f10x_vector.s

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