Firmware upgrade method and firmware upgrade device for embedded system

Abstract

The invention relates to a firmware upgrade method and a firmware upgrade device for an embedded system. The method comprises the following steps: (a) acquiring and storing an upgrade mirror file to a first partition area of a nonvolatile memory of the embedded system, and generating the storage path information of the upgrade mirror file; (b) performing bad block detection on a second partition area of the nonvolatile memory; (c) copying the upgrade mirror file from the first partition area to the good block of the second partition according to the storage path information and modifying the start position of the operating system to be the position of the second partition; (d) performing bad block detection on a third partition of the nonvolatile memory after the operating system is restarted from the second partition in the embedded system; (e) copying the upgrade mirror file to a good block of the third partition area, and modifying the start position of the operating system to be position of the third partition area; and (f) restarting the operating system from the third partition area in the embedded system. Therefore, the upgrade failure problem brought by the bad block generated in the nonvolatile memory such as NAND FLASH in the operating system upgrading process can be solved.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular to a firmware upgrading method for an embedded system and a firmware upgrading device for an embedded system. Background technique [0002] Embedded operating system is a system software with a wide range of uses, usually including hardware-related underlying driver software, system kernel, device driver interface, communication protocol, graphical interface, standardized browser, etc. The embedded operating system is responsible for the allocation of all software and hardware resources of embedded devices, task scheduling, control, and coordination of concurrent activities. It must reflect the characteristics of the system where it is located, and can achieve the functions required by the system by loading and unloading certain modules. At present, the operating systems widely used in the embedded field include: embedded Linux, Windows Embedded (such as: Wince6.0), VxWorks...

AI Technical Summary

Problems solved by technology

[0005] However, in the upgrading process of various existing operating systems, there will be the following problems: (1) the problem that the system dies when the operating system is upgraded due to bad blocks generated by NAND Flash; (2) the problem caused by unreasonable driver design The problem of low system operation stability caused by the loss of file storage path information during the upgrade process

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