Category Archives: General

Brace initialization of user-defined types

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

Uniform initialization syntax is one of my favourite features of Modern C++.  I think it’s important, in good quality code, to clearly distinguish between initialization and assignment.

When it comes to user-defined types – structures and classes – brace initialization can throw up a few unexpected issues, and some counter-intuitive results (and errors!).

In this article, I want to have a look at some of the issues with brace initialization of user-defined types – specifically, brace elision and initializer_lists.

Read on for more…

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Thanks for the memory (allocator)

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

One of the design goals of Modern C++ is to find new ways – better, more effective – of doing things we could already do in C++.  Some might argue this is one of the more frustrating aspects of Modern C++ – if it works, don’t fix it (alternatively: why use lightbulbs when we have perfectly good candles?!)

This time we’ll look at a new aspect of Modern C++:  the Allocator model for dynamic containers.  This is currently experimental, but has […]

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Technical debt

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

What is it & how does it affect software engineering management?
The ‘Golden Triangle’ of project management

The ‘golden triangle’ of project management uses the following constraints:

The rule is: you can pick any two of three; you can’t have them all.

When it comes to software development projects, it’s not uncommon to have a fixed time to market and budget, which means that, under pressure, the constraint that’s affected is quality.

Commonly, when the project management refers to ‘quality’ it implicitly means Intrinsic Quality.

Intrinsic […]

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Code Quality – Cyclomatic Complexity

Niall Cooling

Director at Feabhas Limited
Co-Founder and Director of Feabhas since 1995.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.

In the standard ISO 26262-6:2011 [1] the term “complexity” appears a number of times, generally in the context of reducing or lowering said complexity.

There are many different ways of defining “complexity”, for example, Fred Brooks, in his 1986 landmark paper, “No Silver Bullet — Essence and Accidents of Software Engineering” asserts that there are two types of complexity; Essential and Accidental. [2]

Rather than getting into esoteric discussion about design complexity, I’d like to focus on code complexity.

Over the years, I […]

Posted in Agile, C/C++ Programming, General, Testing | Tagged , , | Leave a comment

Setting up Sublime Text to build your project

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

For many years embedded development was dominated by complex integrated development environments (IDEs) that hide away all the nasty, messy details of a typical embedded software project.

Recently, with the rapidly accelerating adoption of agile techniques in embedded systems, there has been a move away from integrated development environments towards smaller, simpler, individual tools.  Tools like CMake, Rake and SCons are used to manage build configurations.  Container facilities like Docker provide lightweight environments for build and test.  And developers are free […]

Posted in Agile, C/C++ Programming, General | Tagged , , , , | 1 Comment

An Introduction to Docker for Embedded Developers – Part 2 Building Images

Niall Cooling

Director at Feabhas Limited
Co-Founder and Director of Feabhas since 1995.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.

In the initial post, we covered the basics of getting Docker setup and using an official base image for compilation.
But let’s suppose the base image doesn’t include all the facilities our company uses for development. For example, we have migrated from make files to CMake, but more lately we have taken to using the python-based Scons build system for C/C++ projects.
The official gcc base image supports make but not Scons or CMake. As before, we can search for a Scons docker […]

Posted in Agile, General | Tagged , | 3 Comments

Making things do stuff – Part 8

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

We’ve been using templates to provide a hardware register abstraction for use with hardware manipulation problems, typical of what you’d find in a deeply-embedded (“bare-metal”) system.

Previously, we looked at using trait classes to establish pointers and tag-dispatch to handle special-case registers, such as read-only or write-only register.

In this article we’re going to add some syntactic sugar to our Register class, to allow the developer to access individual bits in the register using array-index ([]) notation.  This will allow us to […]

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Making things do stuff – Part 4

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

In the last article we explored the design of a class to encapsulate a physical hardware device.  In that article I deliberately ignored how the class would actually interact with the hardware.

In this article we explore the options available to us for accessing hardware and the consequences of those

Posted in ARM, C/C++ Programming, Cortex, General | Tagged , , , , , , | Leave a comment

Making things do stuff – Part 2

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

Last time we looked at the basics of hardware manipulation in C++.   This time we’ll apply this to some real hardware and have a look at the code

Posted in C/C++ Programming, Cortex, General | Tagged , , , , , , , | 4 Comments

Agile for Embedded Conference – Early Bird registration ends this week

Our early bird offer ends on 31 March, so book now and join us on 3 May for a day dedicated to Agile for Embedded.

The agenda pronises an exciting event and included talks from industry guest speakers Ericsson Television, Altran, and Dyson, all sharing their experiences.

Click here to find out more about the speakers, presentation abstracts or to book your place.

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