Embedded Ethernet technology has been utilized increasingly widely as the communication mode in the substation automation system(SAS).This paper introduces the current applying situation about embedded Ethernet in SAS...Embedded Ethernet technology has been utilized increasingly widely as the communication mode in the substation automation system(SAS).This paper introduces the current applying situation about embedded Ethernet in SAS First.After analyzing the protocol levels used in SAS based on embedded Ethernet and the differences between the TCP and UDP,UDP/IP is selected as the communication protocol between the station-level and bay-level devices for its real-time characteristic.Then a new kind of implementation of the embedded Ethernet is presented based on hardware protocol stack.The designed scheme can be implemented easily,reduce cost significantly and shorten developing cycle.展开更多
基于简单文件传输协议,提出一种通过嵌入式系统现有网络接口实现系统开发过程中大型文件快速烧写的开发方案.分析并介绍了该方案的设计要点,包括系统硬件结构要求、物理层硬件连接方法、TCP/IP协议栈简化、TFTP协议下文件传输的实现方法...基于简单文件传输协议,提出一种通过嵌入式系统现有网络接口实现系统开发过程中大型文件快速烧写的开发方案.分析并介绍了该方案的设计要点,包括系统硬件结构要求、物理层硬件连接方法、TCP/IP协议栈简化、TFTP协议下文件传输的实现方法.实际应用测试比较结果表明:该方案硬件要求简单,在大文件(≥1Mbyte)应用系统下载开发的情况下比传统JTAG口(Joint Test Action Group standard)下载与串口下载效率分别提高102到101数量级.展开更多
文摘Embedded Ethernet technology has been utilized increasingly widely as the communication mode in the substation automation system(SAS).This paper introduces the current applying situation about embedded Ethernet in SAS First.After analyzing the protocol levels used in SAS based on embedded Ethernet and the differences between the TCP and UDP,UDP/IP is selected as the communication protocol between the station-level and bay-level devices for its real-time characteristic.Then a new kind of implementation of the embedded Ethernet is presented based on hardware protocol stack.The designed scheme can be implemented easily,reduce cost significantly and shorten developing cycle.
文摘基于简单文件传输协议,提出一种通过嵌入式系统现有网络接口实现系统开发过程中大型文件快速烧写的开发方案.分析并介绍了该方案的设计要点,包括系统硬件结构要求、物理层硬件连接方法、TCP/IP协议栈简化、TFTP协议下文件传输的实现方法.实际应用测试比较结果表明:该方案硬件要求简单,在大文件(≥1Mbyte)应用系统下载开发的情况下比传统JTAG口(Joint Test Action Group standard)下载与串口下载效率分别提高102到101数量级.
