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A backboard interface SMI and UART multiplexing method

An interface and backplane technology, which is applied in the field of backplane interface SMI and UART multiplexing, can solve the problem of multiple and complex backplane layers of the main control board connector, and achieve the goal of reducing the number of IOs, reducing the design, and reducing the quantity Effect

Active Publication Date: 2019-05-10
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 backboard interface SMI and UART multiplexing method
  • A backboard interface SMI and UART multiplexing method
  • A backboard interface SMI and UART multiplexing method

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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

The invention discloses a backboard interface SMI and UART multiplexing method, and can solve the technical problems that in the design process of an existing router, the number of main control singleboard connectors needing to be designed and the number of layers of a backboard are large, and the design is complex. Based on a main control single board, a backboard unit and an interface single board, the method comprises the following steps that S100, an interface card is powered on, and whether a CPU exists on the single board or not is judged through a Uart interface of a CPU; S200, a body_ on signal of the interface single board and an SMI register are set; S300, the main control logic receives the body _ on signal of the interface single board, and an SMI interface is started to access an interface single board SMI register; And S400, whether the backboard interface is an SMI interface or not according to the value of the register is judged, the backboard interface is set as a Uart interface and the SMI interface is closed if not. According to the backboard interface SMI and UART multiplexing method, the number of connectors of a backboard main control slot position can be reduced, and the design of an interface single board cpu is reduced.

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; 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 ...

Claims

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Application Information

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