The Research On PCI High Speed Data Transmission Platform

As fast development of computer and communication technology, the high speed date transmission platformis widely applied in human various activity domains. The PCI bus has become one major local bus owing to itsadvantages of high transmission rate, plug and play, good compatibility and so on. This thesis focuses on theresearch and design of PCI high speed date transmission platform which can be used in multi-media digital audiolaboratory. Based on the deep analysis of PCI bus interface technology and date interactive mode, taking theprogrammable logic device as its core and combining with the defined asynchronous serial communicationprotocol which achieves real-time transmission of big date stream, the date transmission platform is accomplishedand it can be used to realize the communication between severs and terminals.In this thesis, the PCI high-speed date transmission platform is illustrated in parts of PCI date transmissioncard and network switches, and they are respectively discussed at length in terms of hardware circuits design andFPGA internal logic design. PCI transmission card is mainly responsible for PCI bus interface, sending andreceiving date, connecting with switch and so on. In the design, the bus interface is obtained by PCI_T32IP softcore, while the date transceiver module is achieved by Verilog HDL and embedded IP core. With integrating andembedding the PCI bus interface and date processing logic module in the FPGA, the whole system is moreflexible and has a simpler structure. The date interaction between the PCI card and switches is realized by theLVDS serializer/deserializer, which decreases the complexity of the difference interface circuit, reduces noise andsystem power consumption; The network switch can not only accomplish the date stream transmission, but alsorealize the conversion of date frame format and transmission rate by splitting and compositing date based onFPGA. Meanwhile, to suppress external disturbance and decrease signal attenuation, switches complete datestream transmission with terminals by standard RS-422/RS-485serial communication interface. The experimentalresults, obtained by software PciTree and logic analyzer, demonstrate that the proposed platform can be used toachieve date two-way transmission in the digital multi-media teaching.The PCI high speed date transmission platform proposed in this thesis has compact structure, good stability,easy integration and upgrade. The present platform can serve80terminals simultaneously, the average effectivethroughput rate between switch and terminals is up to338.688Mbps, and the date in the platform transfers atconstant speed without broken signal. Above all, the PCI transmission platform can meet the needs of audio andvideo teaching with strict requirements of real-time characteristics.