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A method for multiplexing backplane interface smi and uart

An interface and backplane technology, applied in the field of backplane interface SMI and UART multiplexing, can solve the problems of complexity, the number of backplane layers of the main control board connector, etc., to reduce the design, reduce the number of IOs, and reduce costs. Effect

Active Publication Date: 2020-10-30
ANHUI WANTONG POSTS & TELECOMM CO LTD
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Problems solved by technology

[0005] A method for multiplexing the backplane interface SMI and UART proposed by the present invention can solve the problem that the number of main control board connectors to be designed and the number of layers of the backplane are large and complicated in the design process of the existing router. technical problem

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  • A method for multiplexing backplane interface smi and uart
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  • A method for multiplexing backplane interface smi and uart

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0022] Such as figure 1 As shown, the method for multiplexing the backplane interface SMI and UART described in this embodiment includes:

[0023] S100, the interface card is powered on, and it is judged whether the single board has a CPU through the uart interface of the CPU;

[0024] S200, setting the board_on signal and the SMI register of the interface board;

[0025] S300. The main control logic receives the board_on signal of the interface board, and enables the SMI interface to access the SMI register of the interface board;

[0026] S400....

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Abstract

A method for multiplexing backplane interfaces SMI and UART can solve the complex technical problems of the number of main control single board connectors to be designed and the number of layers of the backplane in the design process of existing routers. Based on the main control single board, the backplane unit and the interface single board, the following steps are included: S100, power on the interface card, and judge whether the single board has a CPU through the uart interface of the CPU; S200, set the board_on signal and the SMI register of the interface single board; S300, the main control logic receives the board_on signal of the interface single board, and opens the SMI interface to access the SMI register of the interface single board; S400, judges whether the backplane interface is an SMI interface according to the value of the register, if not, sets it as a uart interface, and closes the SMI interface. The method for multiplexing the backplane interface SMI and UART of the invention helps to reduce the number of connectors in the main control slot of the backplane and reduce the design of the cpu of the interface single board.

Description

technical field [0001] The invention relates to the technical field of router backplanes, in particular to a method for multiplexing backplane interfaces SMI and UART. Background technique [0002] In the router design process, due to the large number of slots, generally 4 slots, 8 slots, 12 slots or more, it is necessary to meet the needs of series design and compatible design, and the main control slot often requires a lot of connectors . [0003] The interface boards are divided into E1 boards, Ethernet boards, SDH boards, etc. due to different services; they are divided into boards with CPU and boards without CPU due to different control methods. [0004] Among them, the control mode of the single board with CPU is GE and UART, and the control mode of the single board without CPU is SMI. This makes it possible to make UART and SMI interface compatible. Contents of the invention [0005] A method for multiplexing the backplane interface SMI and UART proposed by the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/771H04L45/60
Inventor 梅德来
Owner ANHUI WANTONG POSTS & TELECOMM CO LTD
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