A Software Engineering Approach to LabVIEW by Jon Conway

By Jon Conway

Writing LabVIEW software program to accomplish a posh activity is rarely easy-especially whilst these last-minute characteristic requests reason a complexity explosion on your process, forcing you to remodel a lot of your code! Jon Conway and Steve Watts supply a greater resolution: LCOD-LabVIEW part orientated Design-which, for the 1st time, applies the theories and rules of software program layout to LabVIEW programming. the cloth is gifted in a lighthearted, enticing demeanour that makes studying stress-free, whether you are not a working laptop or computer scientist. * LCOD software program engineering thoughts make your software program extra powerful and higher capable of deal with complexity-by making it less complicated! Even huge, industrial-grade purposes develop into workable. * layout to include flexibility first, making adjustments and insect fixes less painful * Pragmatic dialogue of the authors' attempted and confirmed options, written by-and for-working programmers * Covers layout ideas; LCOD review, implementation, and complementary concepts; engineering necessities; sort matters; and extra * whole with useful suggestion on necessities amassing, prototyping, person interface layout, and wealthy with examples * paintings via an instance LCOD venture (all code incorporated on significant other site) to tie the teachings jointly"

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UI Controller>>Message Queue Pattern One of the problems with LabVIEW is that it is difficult to decouple the display from the actual program execution. This tends to make diagrams flatter and larger than they should be. It also encourages the passing of data down the hierarchy where it isn't necessary. This results in inflexibility in design. 4) draws its inspiration from the tried-and-tested techniques employed in most Graphical User Interfaces (GUIs), which is the passing of display states as messages onto a message queue.

A technique often employed for identifying classes is something called a noun-verb parse. Basically, look at the requirements and consider each noun and verb as a possible candidate for a class. That all may sound a bit like hard work, but you probably already do it anyway without realizing. An obvious example would be oscilloscope. If you see this noun in the requirements then it is a prime candidate for a class called oscilloscope, or in our case a component. We could offer loads of examples that exhibit nouns and verbs, but apart from being a bit boring it is probably better for you to go back and examine previous projects to see if you have already been doing this.

You could swap for a different relay card, for example, or change the switching configuration or the relays called. But the underlying structure of the software will remain the same. The extra layer of abstraction protects the software design from changes. Also, the higher level of abstraction makes your program easier to read. There is no ambiguity about what you want to happen to the switches when you send a command. Ambiguity in software is bad; ambiguity breeds bugs! Top Chapter 4. LabVIEW Component Oriented Design (LCOD) Why LCOD?

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