P1 port as the output port, then eight light-emitting diodes, circuit simulation rendering, hardware connections see table 3-1. ① write C51 procedures, software delay means to achieve light emitting diode flashes per second. ② write C51 program that allows eight LEDs right to left (top to bottom) lit one by one. ③ write C51 program that enables 8 LEDs lit both sides to the middle of the order, until all the lights, then goes out to both sides the middle order, until all off, so the cycle continues.

EXP3_计数器实验\Counter
...............\Counter.c
...............\Counter.DSN
...............\Counter.hex
...............\Counter.lnp
...............\Counter.LST
...............\Counter.M51
...............\Counter.OBJ
...............\Counter.plg
...............\Counter.PWI
...............\Counter.Uv2.bak
...............\Counter.uvopt
...............\Counter.uvproj
...............\Last Loaded Counter.DBK
EXP3_计数器实验

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