keilc+ proteus light parallel port design of experiments requirements: master the 80C51 microcontroller input and output interfaces Society of switch to use the amount of input and output control interface technology and programming methods Experimental subjects: eight light-emitting diodes D1 ~ D8, respectively connected to the MCU P1.0-P1 .7 port on a switch connected to the P3.0 on. Requested output port output " 0" , the light-emitting diode light. Is closed, to embark on the P1.0-P1.1-...- P1.7 in the order light LED, and then P1.7-P1.6-...- P1.0 order light LED Repeat cycle. Switch off when the stop light indicator.

实验三\LEDCtrl
......\LEDCtrl.c
......\LEDCtrl.DSN
......\LEDCtrl.hex
......\LEDCtrl.lnp
......\LEDCtrl.LST
......\LEDCtrl.M51
......\LEDCtrl.OBJ
......\LEDCtrl.plg
......\LEDCtrl_Uv2.Bak
......\LEDCtrl.Uv2
......\LEDCtrl_Opt.Bak
......\LEDCtrl.Opt
......\LEDCtrl.PWI
实验三

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