Method and device for incremental upgrade of embedded system

Abstract

The invention provides an incremental upgrade method and device for an embedded system. The method comprises the steps that stepped segmentation is performed on an original-version image file and a new-version image file based on the original-version image file, the new-version image file and equipment hardware characteristic parameters, and original-version image file segmented data and new-version image file segmented data containing at least two segments are correspondingly generated; incremental processing is performed according to the original-version image file segmented data and the new-version image file segmented data to correspondingly generate at least two segments of incremental package data, and the incremental package data is synthesized into an update package image file; andthe incremental package data in the update package image file is incrementally restored into the new-version image file segmented data, and the original-version image file segmented data is correspondingly replaced. Through the incremental upgrade method and device, the effect of the incremental upgrade method for the embedded system can be optimized, and storage space and memory occupied duringupgrade and downloading expenditure are reduced.

Description

technical field [0001] The invention relates to the technical field of software system upgrades, in particular to a method and device for incremental upgrades of embedded systems. Background technique [0002] During the operation of embedded remote communication devices, due to program failures, increased functional requirements, performance updates and improvements, etc., it is necessary to upgrade the software of remote devices. This upgrade process is currently also known as OTA. OTA (Over-the-Air Technology), commonly known as (Over-the-Air Technology), is a technology for remote management of SIM card data and applications through the air interface of mobile communications. The application of OTA technology enables mobile communication not only to provide voice and data services, but also to provide new service downloads. For embedded devices, OTA air upgrade not only refers to the upgrade of mobile communication, but other ways, such as WIFI, Bluetooth, etc. After c...

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Problems solved by technology

Although this upgrade solution makes the upgrade package smaller, the backup space occupied during the upgrade process is still too large, and a large memory (RAM) space is required to generate a new version of the software, so there are certain limitations, and it is only applicable to When the amount of data to be upgraded is not too large

[0006] However, for embedded systems, there are generally problems of low microprocessor processing capability and limited internal storage space (SDRAM, ROM, Flash, etc.), and there are obvious disadvantages in using the above two software upgrade solutions

[0007] The current incremental update method is not suitable for embedded systems with scarce resources, but the benefit of incremental update is to reduce the consumption of download resources and storage resources. These two resources are very important in embedded systems. , the smaller the downloaded update image is, the higher the download efficiency will be, and the corresponding storage space will be saved, but at the same time, the incremental update method will consume additional flash backup area and RAM temporary cache area to ensure safe and reliable upgrade, because the incremental update When performing incremental updates, you must first download the update image package to the flash area, and you need to back up an old image file to the flash backup area. At the same time, the generated new image file needs to be stored in the ram cache area first, which means that when using incremental update, you need Resources are determined by the size of the old image and the size of the updated image package

[0008] However, if the old image is too large, the image file is directly cut into segments of equal length, and then the incremental algorithm is performed, the incremental package efficiency (ratio of the incremental package size to the original package size) and the flash backup area are difficult to achieve On balance, the generated update package image file will be very large, which will cause a heavy burden on the incremental upgrade of the embedded system or make it impossible to upgrade and run

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