Method and device for bridging local bus and transmitting data

Abstract

The invention discloses a method and a device for bridging a local bus and transmitting data. The method includes that a CPU (central processing unit) of a main control panel transmits access information to a first programmable logic unit of the main control panel via the local bus; the first programmable logic unit performs framing, coding and parallel-serial conversion for a downlink VLB (virtual local bus frame) for the local bus to obtain downlink data and transmits the downlink data to an interface board via a first port of the main control panel; a second programmable logic unit of the interface board receives the downlink data via a second port of the interface board; and the second programmable logic unit performs serial-parallel conversion, decoding and frame unpacking for the downlink data to recover the information of the local bus, accesses peripheral equipment via an expansion bus and returns an access result to the main control panel by framing for an uplink VLB. The method and the device have the advantages that an address, the data and control signals of the local bus are transmitted via a serializer-deserializer, and high-speed connection between the main control panel and the interface board is realized.

Description

technical field [0001] The invention relates to bus bridging and data transmission technology of communication equipment, in particular to a method and device for local bus bridging and data transmission. Background technique [0002] With the development of technology, the parallel interface has been replaced by high-speed serial link or SerDes (Serializer-Deserializer, serializer-deserializer), more and more programmable logic devices have SerDes, SerDes is responsible for the serial signal The electrical block for transmission and the physical medium related sublayer for clock generation / recovery, the physical medium additional sublayer responsible for serialization / deserialization, and the physical coding sublayer responsible for encoding / decoding data streams are a time-division multiple Multiplexed, point-to-point serial communication technology, that is, multiple parallel signals at the sending end are encoded and converted into high-speed serial signals, passed throu...

AI Technical Summary

Problems solved by technology

When the number of peripheral devices on the interface board is large, and the interface levels and transmission rates are different, the number of connector pins used between the main control board and the interface board needs to be large, and these signals are easy to interfere with each other, which increases the The complexity of the whole system design also increases the hardware cost

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