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Development of General Protocol Conversion Equipment

Author: HuangJingLi
Tutor: JiangShouDa
School: Harbin Institute of Technology
Course: Instrument Science and Technology
Keywords: Protocol conversion DM642 DSP / BIOS
CLC: TP273
Type: Master's thesis
Year: 2011
Downloads: 49
Quote: 0
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Abstract


Need to interconnect heterogeneous virtual test verification system subsystem with physical equipment, while many heterogeneous subsystems with the physical equipment the bus form or agreement with the virtual test verification system is not compatible with the dedicated protocol conversion equipment commonly used there live the disadvantage of poor . To solve this problem , developed a common protocol conversion equipment , in order to achieve of heterogeneous subsystems or physical equipment fast real-time access . In this paper, in-depth study and analysis of the common protocol format and convert virtual test system , based on the data frame , the data elements , the three levels of the data bit general-purpose protocol describes methods and mapping description method , and the ability to achieve agreement information quickly find protocol storage method and protocol conversion equipment based on the overall program . Terms of hardware , the use of the standard high-performance DSP FPGA as the core architecture , designed Ethernet , 1553B the UART ( RS232/RS422 / RS485 ) and other bus interface . EMIF interface in FPAG designed to achieve the control of the DSP on the respective bus ; designed 1553B , the UART serial signal codec unit 1553B, UART bus types , such physical layer transceiver ; design of a data frame identification unit , to achieve improve the efficiency of the protocol decode the different hardware identification protocol frame to the DM642 classification return different interrupt information . Software using DSP / BIOS real-time operating system , developed multithreaded DSP program , designed according to functional requirements of multiple features threaded programs , by the functional thread scheduling software function . Development of the the upper computer network driver protocol through Ethernet the load and Ethernet data transceiver functions . Finally, on the part of the problems and solutions encountered generic protocol conversion identification device debugging is described , and the common protocol conversion device hardware part test .

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