BMCH protocol data transceiver module based on CPCI bus

Abstract

The invention relates to a BMCH protocol data transceiver module based on a CPCI bus, comprising a hardware module and an FPGA program, wherein the hardware module comprises an impedance control circuit board, an electronic component, an SCSI50 signal gang socket, a standard CPCI bus connector and a standard 3U Eurocard board card front panel; the impedance control circuit board and the electronic component are the core functional carriers of the invention and are divided into five functional units, i.e. an FPGA unit, a CPCI bus unit, a BMCH protocol transmitting and conditioning unit, a BMCH protocol receiving and conditioning unit and an assistant unit; and the FPGA program comprises a BMCH protocol data receiver module, a BMCH protocol data transmitter module and a self-checking functional module and is programmed and developed by Verilog HDL. The invention has stable performance and high reliability and can carry out continuous transmission of the BMCH protocol data of large data volume for a long term; CPCI bus data transmission has a DMA function, practical bus transmission rate can reach 80MB / s, and no frames are lost by high-speed continuous transmission; and the BMCH bus signal has strong driving capability and long transmission distance. The invention has simple structure, low cost and convenient use.

Description

technical field [0001] The invention relates to a BMCH protocol data transceiver module based on CPCI bus, in particular to a module for data transmission between a computer and an external device through the BMCH protocol. In the field of military control, the BMCH protocol data bus is widely used in the occasion of large data volume and high-speed telemetry information transmission between the flight control computer and the important internal devices of the missile. At the same time, in the fields of missile testing and simulation, it is necessary to realize high-speed transmission, collection, storage and decoding between BMCH data and computers through the CPCI bus. The invention belongs to the fields of computer communication, computer aided testing and automatic testing. Background technique [0002] PCI (Peripheral Components Interconnect) bus is a standard 32-bit local bus introduced by Intel Corporation. The operating frequency is 33MHz / 66MHz, and the transmission...

AI Technical Summary

Problems solved by technology

[0005] However, in the current BMCH protocol data transceiver module, on the one hand, due to the large amount of BMCH protocol data between the external device and the computer, but limited by the read and write speed of the computer bus, it is impossible to continuously transmit and receive data streams , this function can only be realized if a large-capacity memory is configured on the transmission module as a buffer; on the other hand, there is no dedicated BMCH protocol data transmission module in the current market, and the usual implementation method is to use a digital IO transceiver module to simulate the BMCH protocol Transceiver function, but at the same time, it is necessary to isolate and adjust the IO volume of each channel, and it is difficult to cooperate well with the timing of sending and receiving of the BMCH protocol

Therefore, the current BMCH data transceiver module is not only complex in design and high in cost, but also has poor functionality. It is very prone to frame loss in situations where real-time and large-scale data transmission is required.

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