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。

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.

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同时探讨了CAN总线传输信息的速率、信道容量和节点容量等技术问题。

And we discussed the CAN-BUS key technical such as the transmission speed, channel capacity, node capacity, and so on.

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