2013•Computer and ModernizationRequires access

Software Design of RS485 Serial/Ethernet Converter Based on Double-buffer Queue

MA Ling-jua

Abstract

In order to connect the serial devices that scattered in industrial field to the Ethernet,this article designed an embedded RS485 serial/Ethernet data converter which based on STM32F107VC 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 communication. 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.

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Key concepts: Computer science, Synchronous Ethernet, ATA over Ethernet, Embedded system, Ethernet Powerlink, Serial port, Carrier Ethernet, Computer network