Method for sharing variables among programs in system and storage device

Abstract

The invention provides a method for sharing variables among programs in a system, which is characterized in that a main program, a plurality of auxiliary programs and a database are stored in the system; the method for sharing the variables among the programs in the system comprises the following steps that a main program reads a data address in a database; the main program generates an address- variable mapping file according to the data address and the variable data in the database; when the auxiliary program runs, the address-variable mapping file is read to obtain a corresponding relationship between the data address and the variable data; and the auxiliary program calls the data in the corresponding data address in the database. According to the method for sharing the variables amongthe programs in the system, the data calling speed is high, the stability is high, and maintenance is convenient.

Description

technical field [0001] The invention relates to the technical field of AGV device control, in particular to a method and a storage device for sharing variables among programs in a system. Background technique [0002] There are a variety of control programs stored in the AGV control mechanism, including the main program and auxiliary programs. The main program contains the core control function, with a large amount of operating data, stable operating speed, and high read and write restrictions. The main program is modified, and the auxiliary program runs independently of the main program. The auxiliary program needs to be modified according to the actual application. The auxiliary program shares data with the main program during the running process to reduce the amount of stored data. [0003] The traditional shared data between programs is realized by information exchange between two programs, which has low real-time performance, and occupies a large amount of CPU resources...

AI Technical Summary

Problems solved by technology

[0003] The traditional sharing of data between programs is realized through information interaction between two programs, which has low real-time performance and takes up a lot of CPU resources of the control mechanism, which is inefficient. In order to overcome the above problems, the existing shared memory technology uses the main program to assist The program provides the first address of the shared variable library, and the auxiliary program calculates the address based on the first address, combined with the type of the variable, and then obtains the shared variable mapped from the corresponding address, but this method is only suitable for the relatively large amount of data in the shared variable library. In the fixed case, for the case where a new variable needs to be added to the shared variable library, since the correspondence between the address and the variable data changes after the new variable is inserted, if the auxiliary program keeps searching for the variable data based on the first address, Correct variable data cannot be obtained due to wrong mapping, so it is necessary to update the auxiliary program and redefine the new variable interface. For a control mechanism with multiple auxiliary programs, it is necessary to update multiple auxiliary programs, and its maintenance More difficult and more expensive to maintain

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