Mentor Blogs

Some time ago, I wrote about the use of a memory management unit (MMU) for embedded applications and covered the basics of what such a device can do. Recent comment on that posting inspired me to think more about how an MMU may be used more creatively. The basic function of an MMU is to control a relationship between the addresses that a CPU uses to access specific memory areas and their actual physical … Read More

Linux, memory management unit, RTOS, MMU, Nucleus

I like simple things. Excessive complexity tends to annoy me. When I first started working with computers, I thought that mainframes were overly complicated, so I was pleased to discover minicomputers, where I could really understand exactly what was going on. Embedded software was a natural progression, as, again, I could grasp the entire functionality of the software. But that began to change, as … Read More

Linux, Android, Nucleus, RTOS

As well intentioned as it might be, “Hang up and drive” is not, by itself, a solution to the problem of distracted driving, and it remains to be seen whether or not legislation will have a significant impact. It looks like smart phones are here to stay, and while they are by no means the only source of driver distraction, managing their use inside moving vehicles can reduce the likelihood of crashes. Delphi … Read More

Distracted Driving, Human-Machine Interface (HMI), Delphi, smart phone app, Linux

I have pondered before the appropriateness of Linux for embedded applications. My initial stance was clear enough: I could see very little sense in it. Why use a desktop operating system in such a completely different context? Over the years, the popularity of embedded Linux has increased, the technology of embedded systems has moved on and I have reappraised my views accordingly. With Mentor Embedded … Read More

Multi-OS, Multicore, Linux

The GENIVI Alliance, which is working toward a scalable software architecture for in-vehicle infotainment (IVI), recently released an IVI software architecture report based on interviews with automakers, tier one firms, semiconductor suppliers, and service providers, including Alliance member and non-member companies. Relevant IVI architecture suppliers, according to the report, include Microsoft, … Read More

Microltron, MeeGo, Microsoft, Genivi Alliance, Strategy Analytics, Wind River, in-vehicle infotainment, Android, Moblin, Linux, Maemo OS, QNX, Roger Lanctot, IVI

I have always for medical electronics interesting and I have blogged about it from time to time [here and here, for example]. Part of the reason for my interest stems from an occasional feeling that so much of the electronics around me is ultimately pointless. Many Mentor Embedded customers are making consumer devices, cell phones and other gadgets. Do we really need all of these? Aren’t they really … Read More

Android, User Interface, Linux, Networking, Inflexion UI, Low Power, Nucleus, Multicore, Medical, RTOS

It is becoming common for embedded designs to incorporate more than one CPU - maybe multiple cores on a chip or multiple chips on a board or any combination of these. Indeed, it has been suggested that it will soon be the norm to build systems that way. The use of multiple cores has spawned various technologies and, of course, much terminology and jargon. When new technical terms and acronyms appear, … Read More

Multicore, Multi-OS, MCAPI, Nucleus, Android, Linux

On a previous occasion, I talked about using an MMU [memory management unit] for a specific, slight esoteric purpose. I thought it might be interesting to consider its more conventional use. Also, it is worth remembering that some devices have no MMU support and many systems are built without one anyway. Having met some engineers recently, who could not conceive of the idea of no MMU, clarification … Read More

Nucleus Kernel, MMU, Nucleus, memory management unit, Linux

Power consumption is an issue. With portable devices this affects battery life. [I am irritated by the short intervals between necessary charging sessions with my phone. On the other hand, my netbook can run for over 7 hours on a charge, which is great. Likewise, my newly-acquired iPad seems to perform well.] With mains powered equipment, power consumption is also a concern for environmental reasons. The … Read More

Linux, Low Power, Nucleus

I recently wrote about a “multi-core” development project that I worked on many years ago, including some details of how we managed communication between the CPUs. Things have moved on a lot since those days and multi-core is now rapidly becoming the norm in embedded designs. It is, therefore, unsurprising that a degree of standardization is being established. Specifically, the Multicore Association … Read More

MCAPI, TCP/IP, Multicore, Nucleus Kernel, Nucleus, Linux

Last week, I wrote about a “multi-core” project that I was working on 30 years ago. To be fair, it was actually “multi-CPU” rather than “multi-core”, but many of the challenges were similar, as was the initial design decision to take the approach of distributing the processing capacity. It is interesting to draw a comparison between the system we were developing all those years ago and modern ideas … Read More

Nucleus, MCAPI, Linux, IPC, Multicore, Nucleus Kernel, Interprocessor Communication, Android

Last week I went to Nuremberg [or Nürnberg if you prefer] to attend Embedded World 2010. I have been to this show most years over the last decade or so and it just seems to get bigger and busier each year. This year there were more than 700 exhibitors and in excess of 18,000 visitors. It is now definitely the biggest show/conference for embedded developers anywhere in the world. The electronic displays … Read More

Android, Linux, Inflexion UI, User Interface, Embedded World

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, … Read More

Linux, Nucleus Kernel, Nucleus, RTOS

I want lots of connectivity in my next car and have every reason to expect it (and, of course, to use it responsibly). We’re talking-cutting edge technology of the kind increasingly available to mid-range buyers; features like Internet access, voice recognition, full-color touch-screen displays, diagnostics, and various forms of infotainment. I was a bit surprised to learn that all of that and more … Read More

OLED Displays, Network Car, LCD, Android, Bluetooth, Linux, Microsoft, Netscape, 3G Cellular, Google, Delphi, DSRC, IBM, Infotainment, Bob Schumacher, COMDEX, Internet Access, DVB-T, DVB-SH, Genivi Consortium, QNX, Voice Recognitiion, Wi-Fi, Touch-Screen Displays, USB, Smartphones, Sun Microsystems

It is increasingly common for embedded designs to be implemented using multiple cores. At Mentor Graphics we are keen to support our customers by providing software and services to help them with such endeavors. We also espouse the idea of using multiple operating systems in such designs. I recently presented a Web seminar on this topic [a recording is available as an archive] and I have written a few … Read More

Multi-OS, Linux, Multicore, Nucleus Kernel, Nucleus, Android