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Multi-board card communication system and method based on M-LVDS bus

A card communication and bus technology, applied in the field of multi-board card communication system based on M-LVDS bus, to achieve the effect of convenient use and reasonable structure

Pending Publication Date: 2021-03-09
EAST CHINA INST OF COMPUTING TECH
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  • Description
  • Claims
  • Application Information

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  • Multi-board card communication system and method based on M-LVDS bus
  • Multi-board card communication system and method based on M-LVDS bus
  • Multi-board card communication system and method based on M-LVDS bus

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0049] figure 1 A block diagram of the multi-board communication system based on the M-LVDS bus is shown. The M-LVDS controller (based on FPGA) outputs digital signals of control and data to the M-LVDS driver chip, and the M-LVDS driver chip realizes the conversion of digital signals and differential level signals, and converts 0 and 1 digital signals into M- The general H / L signal of LVDS, the M-LVDS bus is used as the transmission medium to transmit H / L and other level signals. Corresponding to the...

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Abstract

The invention provides a multi-board card communication system and method based on an M-LVDS bus. The multi-board card communication system comprises the M-LVDS bus, an M-LVDS driving chip and an M-LVDS controller. The M-LVDS controller outputs digital signals of control and data to the M-LVDS driving chip; the M-LVDS driving chip is used for realizing conversion between a digital signal and a differential level signal; the M-LVDS bus can be used for transmitting H / L level signals; the M-LVDS bus corresponds to the sending path to form a receiving path, and in the receiving direction, the M-LVDS driving chip converts an H / L level signal on the M-LVDS bus into a digital signal and submits the digital signal to the M-LVDS controller. According to the invention, the transmission rate requirement of 1Mbs-100Mbps can be met, the number of support nodes can reach 32, and the transmission distance can reach 50m.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a multi-board communication system and method based on an M-LVDS bus. Background technique [0002] In embedded systems such as rail transit control systems, there are many boards that need to communicate with each other. At present, the communication protocols widely used in board-level communication include: PCI, CAN, I2C, SPI, serial port, Ethernet, etc. Among them, CAN bus protocol is mostly used in serial communication. Based on considerations of safety, convenience, and low cost, the CAN bus protocol is widely used in the automotive industry. The maximum supported length of the CAN bus is 40 meters, and the highest communication speed is 1Mbps. [0003] In the rail traffic control system, the transmission rate between boards is required to be between 25Mbps and 100Mbps, and the CAN bus can no longer meet the communication requirements. Ethernet transmission ...

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Application Information

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IPC IPC(8): G06F13/40G06F13/42
CPCG06F13/4004G06F13/4291
Inventor 马鹏刘佩张伟郑燕邱益波刘宇殷弼君付仲满许圣全於健
Owner EAST CHINA INST OF COMPUTING TECH