Description: Based on state machine timer interrupt matrix keyboard scanner, very easy to direct the call h file KeyBoardScan () can,
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File list (Check if you may need any files):
KEY_BOARD
.........\DataType.h
.........\keyboard.c
.........\keyboard.h
.........\keyboard.lnp
.........\keyboard.LST
.........\keyboard.M51
.........\keyboard.plg
.........\keyboard.uvopt
.........\keyboard.uvproj
.........\keyboard_uvopt.bak
.........\keyboard_uvproj.bak
.........\STARTUP.A51
.........\STARTUP.LST
.........\STARTUP.OBJ
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