Main control board, embedded system and backup method for embedded system

Abstract

The invention discloses a main control board, which comprises a master / backup selection module and a master / backup switching management module. The master / backup selection module is used for acquiring states of the belonged main control board and another main control board in an embedded system, and determining that the belonged main control board is a master main control board or a backup main control board and whether master / backup switching is needed by comparing the priority level of the acquired states of the two main control boards when the state of the belonged main control board and / or the another main control board changes. The master / backup switching management module is used for finishing the operation of switching from the master main control board to the backup main control board or from the backup main control board to the master main control board when the master / backup selection module determines that the master / backup switching is needed. The invention also provides an embedded system which comprises the two main control boards and at least one expansion module, and a backup method for the embedded system. The switching between master / backup main control boards is quickly completed when the main control board of the embedded system fails. Therefore, services can be reliably and timely recovered.

Description

technical field [0001] The invention relates to the field of embedded systems, in particular to a main control board, an embedded system and a backup method for the embedded system. Background technique [0002] The system block diagram of a common centralized embedded system is as follows: figure 1 As shown, in such embedded systems designed in a centralized manner, there is a board carrying the CPU, CPU peripherals (such as Flash and memory, etc.), on-chip peripherals (such as Ethernet interfaces drawn from related modules integrated on the CPU) , USB interface, serial control port, etc.) and the main control board of the complex programmable logic device (Complex Programmable Logic Device, CPLD) system used to realize watchdog and other hardware operations, the main control board is usually connected to the A plurality of expansion modules, the expansion modules are usually line cards exported through various buses such as Peripheral Component Interconnect (PCI) line car...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a main control board, an embedded system, and a backup method for the embedded system, which are used to solve the problem that the main control board in the existing embedded system cannot be recovered in time when a failure occurs

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