File list (Check if you may need any files):
RS232
.....\R1
.....\..\Debug
.....\..\.....\Exe
.....\..\.....\...\R1.d43
.....\..\.....\List
.....\..\.....\Obj
.....\..\.....\...\main.r43
.....\..\.....\...\R1.pbd
.....\..\main.c
.....\..\R1.dep
.....\..\R1.ewd
.....\..\R1.ewp
.....\..\R1.eww
.....\..\settings
.....\..\........\R1.cspy.bat
.....\..\........\R1.dbgdt
.....\..\........\R1.dni
.....\..\........\R1.wsdt
.....\..\串口实验R1.pdf
.....\R2
.....\..\Debug
.....\..\.....\Exe
.....\..\.....\...\R2.d43
.....\..\.....\List
.....\..\.....\Obj
.....\..\.....\...\main.r43
.....\..\.....\...\R2.pbd
.....\..\Keypad.c
.....\..\Keypad.h
.....\..\main.c
.....\..\R2.dep
.....\..\R2.ewd
.....\..\R2.ewp
.....\..\R2.eww
.....\..\settings
.....\..\........\R2.cspy.bat
.....\..\........\R2.dbgdt
.....\..\........\R2.dni
.....\..\........\R2.wsdt
.....\..\串口实验R2.pdf
.....\R3
.....\..\cry1602.c
.....\..\cry1602.h
.....\..\Debug
.....\..\.....\Exe
.....\..\.....\...\R3.d43
.....\..\.....\List
.....\..\.....\Obj
.....\..\.....\...\cry1602.r43
.....\..\.....\...\main.r43
.....\..\.....\...\R3.pbd
.....\..\main.c
.....\..\R3.dep
.....\..\R3.ewd
.....\..\R3.ewp
.....\..\R3.eww
.....\..\settings
.....\..\........\R3.cspy.bat
.....\..\........\R3.dbgdt
.....\..\........\R3.dni
.....\..\........\R3.wsdt
.....\..\串口实验R3.pdf
.....\R4
.....\..\Debug
.....\..\.....\Exe
.....\..\.....\...\R4.d43
.....\..\.....\List
.....\..\.....\Obj
.....\..\.....\...\main.r43
.....\..\.....\...\R4.pbd
.....\..\main.c
.....\..\R4.dep
.....\..\R4.ewd
.....\..\R4.ewp
.....\..\R4.eww
.....\..\settings
.....\..\........\R4.cspy.bat
.....\..\........\R4.dbgdt
.....\..\........\R4.dni
.....\..\........\R4.wsdt
.....\..\串口实验R4.pdf