A Method to Increase Speed in a Two Dimensional Graphical Programming Language

摘要

Graphical based programming languages have been introduced as they allow to produce a software solution closer to the problem than to the processor. If a micro controller processes a two dimensional graphical program, it takes over the input informations of a function or a procedure, applies them with the instructions of this function or procedure and writes the results to the memory address of the output variable. The controller does not take care, if the application to the input informations is necessary or not. If the function or procedure contains a flag, which is set when the function or procedure has not changed its output values since the last operation cycle, the controller can get the information, that all the functions and procedures, which take with at least one of their inputs the unchanged output information, need not to be applied concerning to this input information. Thus, if concerning to all inputs of a function or procedure there is no change in their values since the last operation cycle, the "value-not-changed"-flag of the function or procedure also can be set. Hence, the cycle time to apply a program can become shorter.