Control method for reducing program upgrade amount of metering equipment

Abstract

The embodiment of the present invention proposes a control method for reducing the program upgrade amount of the metering device, which includes dividing the program area of ​​the metering device into metering-related sub-areas and non-metering-related sub-areas, and each divided sub-area is filled with a function pointer table Initialize function; establish a function pointer table for each sub-area; execute each executable file one by one, initialize the contents of the function pointer table according to the function pointer table initialization function in each sub-area, and use the initialized function pointer table The storage location of the function address is used to update the content of the function call. Since it is only necessary to ensure that the function pointer table is normal during the upgrade process, except for the "function pointer table initialization" function in each sub-area, all functions called by other areas do not need to perform address fixing operations, avoiding The address is fixed and a certain amount of storage space must be reserved for these functions, resulting in wasted space.

Description

technical field [0001] The invention belongs to the field of program upgrade, and in particular relates to a control method for reducing the program upgrade amount of a metering device. Background technique [0002] At present, the existing technologies used to reduce the amount of program upgrades are mainly realized by means of the positioning mechanism of the linker tool. That is, the user's application program is divided into multiple areas by scatter-loading the description file, and they are allocated to different addresses for storage and operation. When the program is divided into multiple areas, there will be some functions called by other areas in each area. In order to ensure that after the program of a certain area is changed, the addresses of the functions called by other areas will not change ( That is, it can be called normally by programs in other areas), and the addresses of these functions called by other areas need to be fixed in the scatter-loading descr...

AI Technical Summary

Problems solved by technology

However, when the number of functions called by other areas is large, for metering devices with limited storage space, it is not negligible to reserve a certain amount of storage space for these functions, and even affect the layout of other areas

Due to the large number of functions called by other areas, the scatter-loading description file becomes huge, which will bring certain difficulties to the maintenance and management of the file

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