Serial port multiplexing method and device

Abstract

The present invention discloses a method and a device for reusing a serial port, and belongs to the electronic circuit design field. The method comprises: the serial port of a master control board and the serial ports of a plurality of service boards are connected on the logic device of the master control board, and the logic device and the serial port connector on the front panel of the master control board are mutually connected; the corresponding relation between the register of the logic device and all the serial ports is established; an order is received, and one serial port of one service board or the serial port of the master control board is specified in the order; according to the corresponding relation, the value of the register is set as the value of the register corresponding to the serial port specified by the order; and the serial port connector and the specified serial port are connected according to the value of the register. In the device, the serial port of the master control board and the serial ports of the service board are connected with the serial port connector through the logic device, and the master control board comprises an initialization module, a receiving module and a reusing module. The present invention realizes the reusing of the serial port, and the communication with all the serial ports of the service board can be realized through the serial port connector, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of electronic circuit design, in particular to a serial port multiplexing method and device. Background technique [0002] The serial port is one of the commonly used debugging interfaces for single boards. It is the most commonly used and basic interface for single-board hardware debugging and locating single-board hardware problems. Because it is the first interface initialized after the CPU starts, it can display the initialization of the single-board hardware by the CPU. process, and the initialization of the network port is relatively late. When a hardware problem occurs on the board, the initialization of the network port is often not completed. Therefore, the serial port is very important when locating the hardware problem of the board. [0003] The single board of the router is usually divided into the main control board and the service board. The serial port of the main control board is located on the front p...

AI Technical Summary

Problems solved by technology

[0006] The interface between the pigtails and the backplane is inside the router, and the backplane is closer to the back panel of the router. When manually connecting the pigtails and the backplane, you need to remove the back panel of the router and then connect, which is poor in operability, especially When the number of serial ports is large, the efficiency is low; when a serial port server is used, it needs to occupy a large number of ports of the serial port server, and the cost is high

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