Embedded system firmware on-line upgrading system

Abstract

The invention discloses an on-line upgrade method for embedded system firmware. A non-volatile memory is divided into two areas, the subareas to which a bootloader and a tiny_os belonging are protected, and an upgrade script is operated under the tiny_os to realize upgrading; the corresponding download request is provided by busybox of an open source; the support to a file system, a tcp / ip protocol stack and the like is provided by the tiny_os; the corresponding download request adopts dynamic linking technology and is shared with system software; different parameters are transmitted to a kernel through the bootloader, so as to tell upgrade operation from normal operation; and the entire upgrade system is only required to enlarge a storage space of about 400K, a plurality of download protocols and file systems can be supported. The invention further provides a spare upgrade method, so that when the subarea of the system software is damaged accidentally, the system upgrading also can be carried out, and the reliability and the safety of upgrading are ensured.

Description

technical field [0001] The invention relates to the technical field of embedded software, more precisely, it relates to an online upgrading method for embedded system firmware. Background technique [0002] The functions of embedded devices are mainly implemented and expanded by software. With the continuous improvement of embedded device functions, the continuous increase of applications and the continuous correction of bugs, the software in the original system needs to be continuously upgraded. Upgrading is to write new software into the non-volatile memory of the embedded device to replace the previously defective or incomplete software. In addition, when the software system is accidentally damaged and cannot operate normally, it also needs to be upgraded. Therefore, the upgrade program in the embedded device must be safe and reliable. [0003] For embedded devices, the manufacturer of the device usually burns the bootloader to the flash through a JTAG debugger or a ded...

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Problems solved by technology

[0005] Its shortcomings: Although it supports more download protocols, it does not think about how to deal with the downloaded upgrade files and system files in different formats, does not implement effective protection methods for system files, and does not properly raise file system accidents The upgrade plan after damage, the upgrade and repair after the accidental file system damage has always been a problem that is difficult for those skilled in the art to break through. Although this invention mentions that the system can be repaired and continued to upgrade, it does not fully disclose the specific solution. There are still doubts about whether or not

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