Compiling method from intermediate language (IL) program to C language program of instruction list

Abstract

The invention discloses a compiling method from an intermediate language (IL) program to a C language program of an instruction list. The method comprises the steps: building a middle storage structure syntax tree according to results of lexical analysis and grammatical analysis through logical analysis on a program of the instruction list and logistic mapping relation between semanteme of the instruction list and semanteme of the C language; combining an auxiliary performance function and an auxiliary data structure define file, and generating an integrated file of the C language program through program data of an original instruction list according to a C language programming method, wherein the program data of the original instruction list is stored in the structure of the syntax tree. The generated C language program completely corresponds to the logic program of the original instruction list and has the advantages of a high-level C language, wherein the advantages include strong transportability, strong compatibility and the like. Due to the structure of the syntax tree and an analytic method of semanteme mapping, compiling is standardized and mass-produced, complexity of the compiling is reduced through adoption of functions and modularization of an auxiliary function of a function block, compiling time is shortened, and speed of the whole compiling process is improved.

Description

technical field [0001] The invention relates to the technical field of compiling programmable logic controllers, in particular to a compiling method from an IL program of a PLC programming language instruction table to a C language program. Background technique [0002] Soft PLC technology is widely used in industrial control, but each manufacturer or research unit develops the compiling and executing technology of PLC program for a specific system environment. This compilation technology for a single operating environment lacks versatility and compatibility, and cannot be transplanted to other computing environments. Therefore, a compiling technology with strong portability and good compatibility has become an urgent need for the development of soft PLC technology. The instruction list conforming to the IEC61131-3 standard is a text-based programming language commonly used in soft PLC programming. C language is a programming language adopted by various computer systems. It...

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Problems solved by technology

[0003] For above-mentioned problem, the present invention proposes a kind of instruction list IL program to the compiling method of C language program, mainly solved the logical composition analysis to IL language in compiling process, the establishment of intermediate grammatical structure, the process...

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