Reversible off-line upgrade method and device for embedded system

Abstract

The invention discloses a reversible off-line upgrade method and device for an embedded system. Segmented code operation and an ROM (read only memory) segmented storage technology are adopted, APP firmware upgrade is guided through bootloader in the embedded system and guides upgrade of the bootloader reversely simultaneously, the factory version of a user is stored to the corresponding address of a bootloader upgrade file in an upgrade process, data cannot be lost during upgrade as in the conventional upgrade, and loss of the user is avoided. Meanwhile, the upgrade file is made in a text form for storage, the text file is copied and pasted to the embedded system requiring upgrade in a USB interface mode, the operation is simple, and very good user experience is obtained.

Description

Technical field [0001] The invention relates to a system upgrade method and device, in particular to an embedded system upgrade method and device. Background technique [0002] Embedded systems are systems used to control and monitor large-scale equipment such as machines, devices, and factories. The embedded system generally recognized in China is defined as a dedicated computer system that is application-centric, based on computer technology, software and hardware can be tailored, and adapted to the strict requirements of the application system for function, reliability, cost, volume, and power consumption. Generally, an embedded system is an embedded processor control board with a control program stored in ROM. In fact, all devices with digital interfaces, such as watches, microwave ovens, video recorders, automobiles, etc., will use embedded systems, but most embedded systems are a single program to implement the entire control logic. The core of an embedded system is compo...

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Problems solved by technology

[0003] For this kind of embedded system, the solidified bootloader program is generally used after leaving the factory. In this way, the process of upgrading the instrument through the PC-side host computer software is extremely cumbersome. It is better to only upgrade the application layer firmware, which is generally used. An online upgrade method, and this upgrade method is also very cumbersome, and professional technicians are required to perform the upgrade

In addition, if you want to upgrade the bootloader program, you must return to the factory to restore the factory settings, which faces the risk of losing important parameters and system operating parameters

At the same time, this method of returning to the factory for upgrading is inconvenient and increases the after-sales service cost of the manufacturer.

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