Findally, we implement SDM300 remote control module and Async communication module on the basis of introducing technology of serial programming , RS485 bus driving mode and RS485 serial driver.
介绍了串口编程技术，RS485总线驱动模式和RS485串口驱动程序。 然后在此基础上设计和实现了SDM300远程控制模块和异步信道的通信模块。
It is explained that using CRC error detection code in asynchronous mode can enhance the error control ability of communication system.
说明了在异步通信方式下，可采用CRC检错码提高通信系统的差错控制能力。
MC provides the control function of multipoint communication and selects the communication mode.
MC提供多点通信的控制功能，确定终端间的通信模式。
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