Integrated Systems

David B Varvell

Sunil C Shah

Larry L Lehman

An automatic computer software code generator for multirate real time control systems uses a functional library to define a multiplicity of functional blocks for building a functional description of a control system. For each functional block there is a software template for generating a set of software statements for performing one or more computations each time the software associated with that functional block is executed. A functional description of the control system software to be generated is provided in the form of a catalog database, and the computational relationships to be implemented by the software generated by the invention are defined by specified combinations of the functional blocks in the functional library. A linking software module organizes the catalog database into a plurality of separate subsystems, each subsystem including all the specified functional blocks with a given repetition rate and skew. Finally, a code generation software module generates software for use in the specified control system. The software routines generated generally include: a subsystem software routine for each subsystem, a scheduler program for initiating the execution of the subsystem software routines in accordance with the repetition rate and skew specified for each corresponding subsystem; and a software interface for holding input, output and temporary data values.

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Campbell, CA, United States of America

David B Varvell