A Function Block Function Modeling Method for Visual Programming

Abstract

The invention discloses a functional block function modeling method for visual programming, which includes: the first step, defining text segments of the functional block function as seven key fields including information description, header file content, parameters, member variables, a code structuring segment, a code initializing segment and a function body code segment, wherein a header file comprises information and variable definition; the second step, analyzing a functional block defining text, extracting segment content corresponding to the key fields, extracting formal parameters of function to form input points of graphs; utilizing a returned value as a first input point in a default manner; analyzing definition statements of the member variables to form an output variable table and output the same; and the third step, processing extensional conditional-compilation statements during code generation, and outputting branch codes corresponding to the conditions. The member variables in the functional block function modeling method are flexible in definition, easy to transplant, visual and understandable, and are convenient for users to develop and maintain.

Description

technical field [0001] The invention belongs to the field of visual programming, and provides a modeling and editing method of visual editing symbols for application personnel, and specifically relates to the modeling processing of function block functions. Background technique [0002] Visual programming is an object-oriented graphical software development method. In order to realize application functions, various programming symbols are used to build program models and configure data flows, and schematic diagrams are used to represent program languages ​​and form target files. Before visual programming, it is necessary to create a set of functional function libraries for graphical programming. For this purpose, it is necessary to define a set of modeling methods and rules for functional blocks, which are convenient for application personnel to master, and provide tools for data definition and graphic editing. Some of the existing modeling methods refer to the IEC61131 stan...

AI Technical Summary

Problems solved by technology

Some of the existing modeling methods refer to the IEC61131 standard, and use structured text description to form code interpretation and execution. However, embedded device programs require high-efficiency code, and the code space is limited. The modeling method based on IEC61131 is difficult to solve. Efficient Code Performance and the Conflict of Limited Code Space

ABB's Hidraw tool adopts a custom output stream modeling method combined with a specific CPU. Part of the output is assembly code, and the code body is subject to the format of the output stream and the target compiler, which is lacking in cross-platform transplantation.

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