Communication system and method based on redundant BLVDS bus

Abstract

The invention provides a communication system and method based on a redundant BLVDS bus. The system comprises a master station device and a plurality of slave station devices. The master station device and the plurality of slave station devices are connected together through a default BLVDS bus and a redundant BLVDS bus to form a topological structure of the bus; the master station device comprises a first verification unit, an address allocation unit and a first bus data transceiving unit; each slave station device comprises a second verification unit, an address receiving unit and a second bus data transceiving unit; after being powered on, the master station device allocates a dynamic address to each slave station device through the address allocation unit; the first bus data transceiving unit and the second bus data transceiving unit are used for realizing data interaction between the master station device and the slave station devices, and are connected through the default BLVDS bus and the redundant BLVDS bus; and data on the default BLVDS bus and the redundant BLVDS bus are received and sent.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a communication system and method based on a redundant BLVDS bus. Background technique [0002] BLVDS (Bus Low Voltage Differential Signaling) bus-type low-voltage differential signal is a bus interface circuit based on LVDS (Low Voltage Differential Signaling) technology, and has a low-voltage differential signal of about 250mV and a fast transition time, which solves the problem of LVDS in bus technology. The defect of double transmission of communication data, while inheriting the advantages of fast transmission speed in LVDS bus, is specially used to realize the application of multi-point cable or backplane signal communication. In some medium and large system equipment, due to the fast data interaction rate of the BLVDS bus, it will inevitably be affected by other factors (such as: physical damage, electrical interference, etc.), resulting in the data interaction ...

AI Technical Summary

Problems solved by technology

For example: a kind of data communication method based on BLVDS bus of Chinese patent CN108768814A explanation, what the data communication method of this BLVDS bus realizes is the data transmission mechanism of single-way bus, and has not received correct all the time after master control device completes order sending The reply means that the sending of the command has failed. Therefore, after the master control device completes the sending of the command, the system will stagnate for a long time, affecting the normal data exchange of other slave devices, thereby reducing the rate of data exchange on the bus.

Images