IC693CMM311低价,厦门卡库电气有限公司的IC693CMM311低价!!!
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3.5 通信软件的开发
①初始化串行通信口。通过计算机串口进行通信之前,必须根据监控设备的有关通信参数,约定双方的通信方式,包括波特率的设置、奇偶位校验及停止位的设立。确定数据传输帧格式,确定UART操作方式,逐个对线路控制寄存器和MODEM寄存器写入操作。
②查询发送流程。只需IC693CMM311CPU检测到UART发送器保持寄存器为空,即向UART输出一个字符,发送方首先输出RTS和DTR有效,检测MODEM寄存器,只有收到DEC输入的CTS、DSR有效,CPU才向UART输出一发送字符。
③查询接收流程。
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