基于双缓冲队列的RS485串口／以太网转换器软件设计

摘要

为了将分散于工业现场的串口设备接入以太网，本文设计一种基于STM32F107VC微处理器的嵌入式RS485串口/以太网的数据转换器。移植嵌入式TCP/IP协议栈LwIP到ARM平台，构造双缓冲队列，保证串行通信的效率，通过软件编程实现串行通信协议和以太网的TCP/IP协议的相互映射，使得串口数据和以太网数据相互转换。实验表明，串口/以太网数据转换器能够正常工作，数据转换稳定、可靠。%In order to connect the serial devices that scattered in industrial field to the Ethernet , this article designed an embed-ded RS485 serial/Ethernet data converter which based on STM 32F107VC microprocessor.The embedded TCP/IP protocol stack LwIP is transplanted to the ARM platform , and double-buffering queue is constructed to ensure the efficiency of serial communica -tion.Serial communication protocol and Ethernet TCP /IP protocol are mapped to each other by software programming , so that the data can be converted between serial port and Ethernet .The experiments show that the serial/Ethernet data converter can work normally, data conversion is stable and reliable .