Method for realizing real-time monitoring of multi-channel MDIO (Management Data Input Output) devices based on FPGA

Abstract

The invention discloses a method for realizing real-time monitoring of multi-channel MDIO (Management Data Input Output) devices based on an FPGA. The method comprises the following steps: a CPU is connected with the FPGA by a bus and clock and data lines of each MDIO device are connected with different I / O ports of the FPGA; a plurality of MDIO logic modules with MDIO host mode read-write operation functions in the FPGA are connected with the clock and data lines of the MDIO devices respectively; and the CPU accesses to the MDIO logic module, in the FPGA, corresponding to the MDIO device required to be operated, configures operation parameters corresponding to the MDIO device, finishes read or write operation on the MDIO device by controlling the work of the MDIO logic module, generates an interrupt identifier, and judges whether the read or write operation is completed or not according to an interrupt identifier situation obtained by CPU software. According to the method, the MDIO devices can be operated at the same time, so that the stability of a data real-time system is improved; the participation frequency of the CPU software is reduced, so that the use frequency of the CPU software is increased; and for the MDIO devices of different manufacturers, a universal drive program can be adopted, so that the maintenance cost is reduced.

Description

technical field [0001] The invention relates to real-time monitoring of transmission equipment, in particular to a method for realizing real-time monitoring of multi-channel MDIO equipment based on FPGA. Background technique [0002] Management Data Input and Output (MDIO) is a simple two-wire serial interface that connects management devices (such as MAC controllers, microprocessors) to transceivers with management functions (such as multi-port Gigabit Ethernet transceivers or 10GbEXAUI transceiver) to control the transceiver and collect status information from the transceiver. The status information that can be collected includes link status, transmission speed and selection, power-off, low-power sleep state, TX / RX mode selection, auto-negotiation control, loopback mode control, etc. [0003] For Gbit Ethernet, the serial communication bus is called MDIO, which is defined by IEEE through several clauses of the Ethernet standard IEEE802.3. In addition to the functions requ...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is the problem that the real-time performance of data acquisition is reduced during real-time monitoring of multi-channel MDIO equipment, the difficulty of writing a unified driver program for monitoring software, and the problem that the use efficiency of CPU is greatly reduced

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