文件名称:sibieqi
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一键多功能按键识别技术
如图4.9.1所示,开关SP1接在P3.7/RD管脚上,在AT89S51单片机的P1端口接有四个发光二极管,上电的时候,L1接在P1.0管脚上的发光二极管在闪烁,当每一次按下开关SP1的时候,L2接在P1.1管脚上的发光二极管在闪烁,再按下开关SP1的时候,L3接在P1.2管脚上的发光二极管在闪烁,再按下开关SP1的时候,L4接在P1.3管脚上的发光二极管在闪烁,再按下开关SP1的时候,又轮到L1在闪烁了,如此轮流下去。-a multifunctional keys recognition technology shown in Figure 4.9.1. Switching SP1 Then in P3.7/RD pin, in AT89S51 P1 port MCU has been followed by four light-emitting diode, the power, Then in L1 P1.0 pin of LEDs in scintillation, every time? Switches SP1, Then in L2 P1.1 pin of LEDs in scintillation and pressing switches SP1, L3 Then in P1.2 pin of LEDs in scintillation and pressing switches SP1, L4 Then in P1.3 pin of LEDs in scintillation and pressing switches SP1, Also at the turn of L1 flashing, rotating so on.
如图4.9.1所示,开关SP1接在P3.7/RD管脚上,在AT89S51单片机的P1端口接有四个发光二极管,上电的时候,L1接在P1.0管脚上的发光二极管在闪烁,当每一次按下开关SP1的时候,L2接在P1.1管脚上的发光二极管在闪烁,再按下开关SP1的时候,L3接在P1.2管脚上的发光二极管在闪烁,再按下开关SP1的时候,L4接在P1.3管脚上的发光二极管在闪烁,再按下开关SP1的时候,又轮到L1在闪烁了,如此轮流下去。-a multifunctional keys recognition technology shown in Figure 4.9.1. Switching SP1 Then in P3.7/RD pin, in AT89S51 P1 port MCU has been followed by four light-emitting diode, the power, Then in L1 P1.0 pin of LEDs in scintillation, every time? Switches SP1, Then in L2 P1.1 pin of LEDs in scintillation and pressing switches SP1, L3 Then in P1.2 pin of LEDs in scintillation and pressing switches SP1, L4 Then in P1.3 pin of LEDs in scintillation and pressing switches SP1, Also at the turn of L1 flashing, rotating so on.
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