Posts Tagged ‘real time’

30 January, 2017

Not long ago, I was telling a friend about an iPad app that I had found useful. I commented that it was very reasonably priced at $10. They were very proud to tell me that they never pay for apps on their phone or tablet and only use free ones. I am always suspicious of the word “free”. I am a firm believer in the TANSTAAFL [There Ain’t No Such Things As A Free Lunch] principle – everything has a price, which may be monetary or something else.

I started pondering about how TANSTAAFL applies in the world of embedded software … Read the rest of this entry »

, , , , , ,

23 January, 2017

My latest article on embedded.com has been published. This piece is the fourth installment of the RTOS Revealed series, which will continue to appear through 2017 and beyond. The series will cover every aspect of real time operating systems.

Tasks, the context switch, and interrupts

In this article, I take a further look at tasks and consider how the context switch works and how interrupts may be handled.

I hope that you find the series interesting and look forward to your input by comment or email or via social media.

, , , , ,

16 January, 2017

For many years, I would regularly be asked about networking options for embedded systems. Commonly, the query was about real time systems and how they might be connected straightforwardly. Most often, the question was “Can I use Ethernet?” This was an obvious enquiry, as Ethernet is a very well established standard. Also the hardware is widely available and competitively priced and it may be used as a vehicle for TCP/IP etc., which is familiar to many developers. The answer was never totally straightforward … Read the rest of this entry »

, , , , , , , , , ,

14 November, 2016

Next week is the Embedded Conference Scandinavia [ECS], which takes place in Kista – a suburb of Stockholm, Sweden.

This is the foremost embedded event in the Scandinavian region and I have visited and presented there numerous times. This year I have the privilege of being invited to present 4 papers … Read the rest of this entry »

, , , , , , , , ,

7 November, 2016

My latest article on embedded.com has been published. This piece is the second installment of a new series, called RTOS Revealed, which will appear from time to time for the rest of this year, into 2017 and beyond. The series will cover every aspect of real time operating systems.

Program structure and real time

In this article I take a look at ways to structure an embedded application and what real time is all about. This leads to the decision making process for utilizing an RTOS or not.

I hope that you find the series interesting and look forward to your input by comment or email or via social media.

, , , , ,

18 July, 2016

An embedded system is normally a CPU [or some CPUs] interfaced to a number of peripheral devices. The software processes data and controls the peripherals. In summary, that is what embedded systems are all about. But, of course, there are many other details and that is what occupies embedded software developers most of the time. A significant issue is around peripherals and timing … Read the rest of this entry »

, , , ,

23 May, 2016

I recently received an email, from somebody with whom I was not acquainted, with the subject line “Probably a silly question”. This got my attention, as I think the only silly thing about a question is not asking it. It certainly was not a silly question. The emailer was asking about implementation of a real time system and I gave him some advice, which I hope was helpful.

With his permission, I will share the question and my answer … Read the rest of this entry »

, , , , , ,

30 January, 2012

Q&A

Posted by

As I spend a lot of my time talking about embedded software via a variety of media – conferences, articles, Web seminars, this blog are examples – I frequently get emails requesting copies of materials or posing questions. All of this communication is very welcome and I do my best to respond promptly and, where I can, usefully.

If I think a question might be of wider interest, it seems only logical to share it here. I recently heard from Vahid Montazeri, who was asking about Android … Read the rest of this entry »

, , , ,

1 March, 2010

The term “real time” is widely used nowadays. Although it is a technical term, it finds its way into quite normal conversation. I might be heard to say “I do not watch much real-time TV”, meaning that I record programs to watch at my convenience. So, colloquially, real time means “immediate” or “occurring now”. How does this align with its precise meaning when we refer to a real time operating system, for example? … Read the rest of this entry »

, , , ,

@colin_walls tweets

Follow colin_walls