目前电子仪器仪表大量采用串行方式做为通信接口，无法连入计算机网络，设计了一种嵌入式串口服务器模块。模块以微处理器S3C2440A为核心处理芯片，使用以太网控制器RTL8019AS和电平转换芯片MAX3232处理转换网络数据和串行数据，并对轻量级IP协议LWIP在uC/OS-II操作系统上进行移植，使串口服务器能够在网口和串口间实现双向数据透传。实验证明该模块传输数据实时准确，能够满足实际工程的需要。%At present the electronic instrument almost takes serial port as the communication interface, it cannot accessing into the network, the design of an embedded serial server module is proposed. The module employs embedded chip S3C2440A as the microprocessor, takes Ethernet controller chip RTL8019AS, level conversion chip MAX3232 to convert the data, and transplants Light-weight IP Stack protocol into uC/OS-II operating system. Transparent data transmission realized between serial port and Ethernet. The experiment shows that this device runs stably and meets the need of communication in industrial environment.
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