SP1 then switch on at P3.7/RD pin in ports P1 MCU AT89S51 then there is four light-emitting diode, the time on electricity, L1 then up at the P1.0 pin at blinking light-emitting diodes, when each press the switch SP1 first time, L2 then at P1.1 pin up at the light-emitting diode flashes, and then press the switch SP1 when, L3 then on the P1.2 pin at the light-emitting diode flashes, and then press the switch SP1 when, L4 then up at the P1.3 pin at blinking light-emitting diode, and then press the switch when SP1 and turn at blinking L1, and so go on a rotational basis.

一键多功能的识别.doc

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