门禁指纹识别控制系统毕业设计_酷文网 关键字：LTT-C500；ARM7；AT89S52；步进电机；串口通信 [gap=2014]Keywords：LTT-C500; ARM7; AT89S52; step electromotor; the serial communication
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The serial communication is adopted between two levels.
两级之间采用串行方式进行通讯。
The serial communication protocols in data sampling module are presented.
给出了数据采集模块的串口通信协议。
The serial communication connects the instrument to the main controlling system so that automation is achieved.
通过与主控系统的串行通信，实现了对测试仪的自动控制。
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