The simulator is divided into four modules and realized separately: thread control module, memory control module, communication control module and instruction set module.

模拟器分为四个模块：线程控制模块，存储控制模块，通信控制模块和指令系统模块，分别实现。

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The whole structure of this system is built, and the means of implement that inputting system control messages and communication module are introduced importantly.

建立了系统的整体结构，重点介绍了系统控制信息输入模块和通信模块的实现方法。

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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。

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