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Author Archives: Niall Cooling
Embedded Systems Conference – Silicon Valley
As I’m sure you’re well aware, the ash cloud from the Eyjafjallajokull volcano (which began erupting in mid-March) pretty much brought much of European airspace to a standstill over last weekend and into this week. Now that UK airspace has been reopened, it appears I can resume plans for my visit to the Embedded Systems Conference in San Jose next week.
The sessions I’m directly involved with are:
Examining ARM’s Cortex Microcontroller Software Interface Standard – CMSIS
Date/Time: Tuesday […]
Why is technical training so hard to get funding for?
Over many years of delivering technical training to the embedded systems sector, two questions have always bothered me:
Why, when the economy gets difficult, are training budgets one of the first things to get cut?
Why do delegates, who have waited months (sometimes years) to attend training, get pulled off mid-course?
Even though a myriad of articles tell us why businesses should invest in training during an economical downturn (Why Invest in Training During an Economical Downturn?) funding for training is very hard […]
Close but no cigar…
After not too much of a learning curve we’ve migrated the website to support wordpress and the associated tools (SQL, PHP, etc.). After checking everything was fine and giving the go ahead for the “go live” for some reason it’s lost the links to all the diagrams from the posts! So I’ll be retrofitting the diagrams over the next week.
First impressions, WordPress is a wonderful leap forward from blogger.
Next post: reflections from embedded world
Posted in General
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Blogger.com to discontinue support for FTP
Unfortunately Google (via blogger.com) have announced that as of the 26th March 2010 they will discontinue support for FTP uploads from blogger accounts. Current the Feabhas blog is created and managed from blogger but uploaded to our Feabhas server. So having really just got my head around blogging it’s got to be all change. We have a number of posts to publish (including my trip report to embedded world 2010), but I plan to hold off until we have resolved […]
Posted in General
3 Comments
Artisan – Aonix merger
Late last month the merger of Artisan and Aonix was announced. This is yet another interesting move in the supply of tools to the embedded systems community.
The tool market has seen a number of significant changes over the last year. It started just over a year ago with the acquisition of Telelogic by IBM. At that time Telelogic were starting to become the dominant player in the embedded design tool market (predominately UML), based primarily around their Rhapsody tool […]
Declarations and Definitions in C
Please Note: This post is focusing on pre-C99. The reason being is that it is aimed at the embedded C programmer who tends to be working with pre-C99 based cross-compilers. Also I have split it into two as it became my larger, due to feedback, than first anticipated.
On the surface declarations and definitions in C are pretty straight-forward; but once we start introducing the concepts of scope, storage-duration, linkage and namespace life is not so simple.
Program Objects (Variables)
Let’s start with […]
Posted in C/C++ Programming
Tagged C Declarations, C Definitions, C90, prototype declaration, tentative definiton
3 Comments
Unscrambling C Declarations
Note: Based on some feedback I should clarify that this does not cover C99 syntax
Even though the C programming language has been around since the late 1960’s, many programmers still have trouble understanding how C declarations are formed. This is not unsurprising due to the complexity that can arise when mixing pointer, array and function-pointer declarations.
In this posting we shall look at some complex declarations to try and understand them by considering how they are formed. The intent is […]
Task Synchronisation – Part 2: Multiple Tasks and RTOS APIs
First off, apologies for the delay in this follow up to the previous post Task Synchronisation, it has been a mad couple off weeks with a combination of vacation and work.
In the previous post I looked at the foundation of task synchronization demonstrating there are a range of synchronisation models (bilateral/unilateral, persistent/non-persistent, etc.). In this post I shall look at multi-task synchronisation and then investigate specific RTOS APIs.
MULTIPLE TASKS WAITING
So far we have only dealt with the simple case of […]
Posted in RTOS
Tagged Event Flags, Rendezvous, RTOS, Signals, Synchronisation, Synchronization
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Task Synchronisation
Synchronisation is an everyday event, both in the real-world and the computer program. For example meeting a friend for a coffee requires synchronisation, in that both parties need to arrive within a given timeframe to make the event worthwhile (sometimes referred to as a rendezvous – however this tends to have more romantic implications). Alternatively, receiving a PO via fax is a form of synchronisation. The company waiting on the PO will-not/cannot start working on the project until this event […]