A simple learning example of 51 beginners, easy to get started, learn to understand the 51 single-chip, an example of a separate button.

独立按键\key
........\key.c
........\key.hex
........\key.LST
........\key.M51
........\key.OBJ
........\key.Opt
........\key.plg
........\KEY.txt
........\key.Uv2
........\test0.c
独立按键

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