Multi-unit communication test system realized based on FPGA

Abstract

The invention discloses a multi-unit communication test system realized based on FPGA. The multi-unit communication test system comprises a resource board, a PLC module and an upper computer. The resource board comprises an FPGA circuit, a drive circuit, an Ethernet module, an AC bus analog circuit, a DC power supply circuit, a clock circuit and a reset circuit. The PLC module comprises 20 clientside subunits PLC1-PLC20, and each client side subunit is provided with a work display lamp LED1-LED20, a switch S1-S20 and a server subunit PLC21. A client subunit, a work display lamp and a server subunit of the PLC module are connected with a drive circuit of the resource board; the drive circuit, the clock circuit and the reset circuit are connected with the FPGA circuit, and the FPGA circuitis connected with the Ethernet module. The system has the advantages that the number of serial ports is large, the communication speed is high, the test efficiency is high, and real-time programming control can be achieved through the upper computer, communication between the PLC units and communication between the upper computer and the PLC units are achieved on the basis of the FPGA chip, and the purpose of simulating the communication environment needed by a test to the maximum degree is achieved.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a structure and a method for performing data communication between various PLC units and between a host computer and a PLC unit through an FPGA chip. Background technique [0002] High-speed rail technology is a rapidly developing emerging industry. To ensure its safe and reliable operation, good data exchange communication is inseparable. Generally speaking, it is unrealistic to conduct communication tests directly on high-speed rail, and the cost is high. It is necessary to simulate the environment of high-speed rail communication through certain technical means to test the status and reliability of communication. With the development of science and technology, especially communication technology and network transmission technology, it is possible to simulate the communication of multiple carriages of high-speed rail. [0003] The traditional communic...

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Problems solved by technology

[0004] The object of the present invention is to solve the simulation test problem of high-speed rail communication, by above-mentioned analysis, the microcomputer with CPU structure such as single-chip microcomputer has various defects, can not undertake this task well, in view of this, the present invention provides a kind of realization based on FPGA The multi-unit communication test system adopts the FPGA that can be executed in parallel instead of the single-chip microcomputer as the main control chip of the communication circuit to solve the problem of insufficient number of serial ports and insufficient communication speed. At the same time, the FPGA can be programmed and controlled by the host computer, which improves the flexibility of the system. and adaptability, human-computer interaction is also enhanced

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