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485通讯

于 2022-04-23 发布 文件大小:1.75 MB
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在多机通信中,最重要的是保证通信有条不紊地进行,因此需要严格的通信协议和完善的通信软件。 RS-485方式构成的多机通信系统采用主从式结构:主机控制多个从机,作为从机的单片机不主动发送命令或数据,一切都由主机单片机控制;并且在一个多机系统中,只有一台主机,各台从机之间不能相互通信,即使有信息交换也必须通过主机转发。采用RS-485构成的多机通信系统原理。

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