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Category Archives: C/C++ Programming
Peripheral register access using C Struct’s – part 1
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.
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.
Latest posts by Niall Cooling (see all)
- Navigating Memory in C++: A Guide to Using std::uintptr_t for Address Handling - February 22, 2024
- Embedded Expertise: Beyond Fixed-Size Integers; Exploring Fast and Least Types - January 15, 2024
- Disassembling a Cortex-M raw binary file with Ghidra - December 20, 2022
When working with peripherals, we need to be able to read and write to the device’s internal registers. How we achieve this in C depends on whether we’re working with memory-mapped IO or port-mapped IO. Port-mapped IO typically requires compiler/language extensions, whereas memory-mapped IO can be accommodated with the standard C syntax.
Embedded “Hello, World!”
We all know the embedded equivalent of the “Hello, world!” program is flashing the LED, so true to form I’m going to use that as an example.
The […]
A brief introduction to Concepts – Part 2
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
In part 1 of this article we looked at adding requirements to parameters in template code to improve the diagnostic ability of the compiler. (I’d recommend reading this article first, if you haven’t already)
Previously, we looked at a simple example of adding a small number of requirements on a template parameter to introduce the syntax and semantics. In reality, the constraints imposed on a template parameter could consist of any combination of
Type traits
Required type aliases
Required member attributes
Required member functions
Explicitly listing […]
Posted in C/C++ Programming
Tagged C++, C++20, C++2a, concepts, generic programming, Modern C++, requires, Templates
4 Comments
A brief introduction to Concepts – Part 1
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
Templates are an extremely powerful – and terrifying – element of C++ programs. I say “terrifying” – not because templates are particularly hard to use (normally), or even particularly complex to write (normally) – but because when things go wrong the compiler’s output is a tsunami of techno-word-salad that can overwhelm even the experienced programmer.
The problem with generic code is that it isn’t completely generic. That is, generic code cannot be expected to work on every possible type we could […]
Posted in C/C++ Programming
Tagged C++, C++20, C++2a, concepts, generic programming, Modern C++, requires, Templates
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An Introduction to Docker for Embedded Developers – Part 5 Multi-Stage Builds
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.
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.
Latest posts by Niall Cooling (see all)
- Navigating Memory in C++: A Guide to Using std::uintptr_t for Address Handling - February 22, 2024
- Embedded Expertise: Beyond Fixed-Size Integers; Exploring Fast and Least Types - January 15, 2024
- Disassembling a Cortex-M raw binary file with Ghidra - December 20, 2022
Following on from the previous post, where we spent time reducing the docker image size, in this post I’d like to cover a couple of useful practices to further improve our docker image:
Copying local files rather than pulling from the web
Simplifying builds using a multi-stage build
Copying in Local Files
So far, when installing the GCC-Arm compiler, we have pulled it from the web using wget. This technique can suffer from two issues:
Web links are notoriously fragile
https adds complexity to the packages […]
Updated: Developing a Generic Hard Fault handler for ARM Cortex-M3/Cortex-M4 using GCC
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.
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.
Latest posts by Niall Cooling (see all)
- Navigating Memory in C++: A Guide to Using std::uintptr_t for Address Handling - February 22, 2024
- Embedded Expertise: Beyond Fixed-Size Integers; Exploring Fast and Least Types - January 15, 2024
- Disassembling a Cortex-M raw binary file with Ghidra - December 20, 2022
The original article was first posted back in 2013. Since posting I have been contacted many times regarding the article. One re-occuring question has been “How do I do this using GCC?”. So I thought it was about time I updated the article using GCC.
GNU Tools for ARM Embedded Processors
The original article used the Keil toolchain, here I am using arm-none-eabi-gcc. One of the major benefits of CMSIS is that almost all the code from the original posting will compile […]
Code Quality – Cyclomatic Complexity
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.
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.
Latest posts by Niall Cooling (see all)
- Navigating Memory in C++: A Guide to Using std::uintptr_t for Address Handling - February 22, 2024
- Embedded Expertise: Beyond Fixed-Size Integers; Exploring Fast and Least Types - January 15, 2024
- Disassembling a Cortex-M raw binary file with Ghidra - December 20, 2022
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 cyclomatic complexity, McCabe, Static Analysis
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Your handy cut-out-and-keep guide to std::forward and std::move
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
I love a good ‘quadrant’ diagram. It brings me immense joy if I can encapsulate some wisdom, guideline or rule-of-thumb in a simple four-quadrant picture.
This time it’s the when-and-where of std::move and std::forward. In my experience, when programmers are first introduced to move semantics, their biggest struggle is to know when (or when not) to apply std::move or std::forward. Usually, it’s a case of “keep apply std::move until it compiles”. I’ve been there myself.
To that end I’ve put together a […]
Posted in C/C++ Programming
Tagged C++, C++0x, C++11, C++1y, Modern C++. C++11. C++14, move policy, move semantics, resource management
2 Comments
Setting up Sublime Text to build your project
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
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 agile for embedded, build process, scons, Sublime Text, Toolchain
1 Comment
“May Not Meet Developer Expectations” #77
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
Question: Does the following compile?
int func()
{
int (func);
return
Posted in C/C++ Programming
Tagged C++11, C++14, debugging, declaration, Modern C++, multi-threading
3 Comments
Exceptional fun!
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.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
In this article I want to look at some applications for one of C++’s more obscure mechanisms, the function
Posted in C/C++ Programming
Tagged C++03, C++11, C++14, exceptions, function try-block, goto, Modern C++
3 Comments