Hey Embedded Developers! Buy This Magazine!
Those of you who are primarily interested in the development of embedded systems may ask why start reading Linux Journal now when you can just tell it's going to be full of non-embedded stuff? And why should regular Linux developers care about the embedded articles? The stuff you're interested in won't run on a Linux watch anyway, right?
The short answer is that Greg Kroah-Hartman's Driving Me Nuts column, on device drivers, will be starting this month. Greg maintains the Linux USB and PCI Hot Plug support and has written great articles for both Linux Journal and Embedded Linux Journal. Now we bring you Kernel Korner every month and Driving Me Nuts every other month, which averages out to a monthly helping and a half of kernel goodness you won't find anywhere else.
Now that you've sent in your subscription card, the long answer is that Linux, and free software in general, are inherently embeddable. By their nature, embedded projects thrive on software that is free to port, customize and sell. If you don't believe this, look at the spectacular success (ha!) of the much-hyped wannabe “Media OS”, BeOS, which sank without a splash while the real media devices, such as TiVo and Moxi, went Linux.
When I told Greg about the new Cypress USB chip, the SL811HS, and the driver for it that Cypress is releasing under GPL, his first reaction was that he was glad Cypress has “a clue”. It looks like a very useful part, too. It does both host and slave, so you could plug a PDA into your computer to sync files and plug USB peripherals, such as a mouse or keyboard, into the PDA later. Try one.
For those of you developing for desktop or server Linux, why make your users sit around and get carpal tunnel syndrome when they could be using a convenient embedded device where the real work (or fun) is? Or better yet, why not cut the user out of the boring stuff altogether and let the machine deal with the real world? Your software will effectively accomplish more in an “embedded” device than in the server room or office. Same goes for your web site. Try it on a Zaurus today.
But back to the clue part. Embedded Linux isn't just a shrink-wrap package that says “embedded” on it. It's a standard generic platform with a thorough collection of drivers that's growing every day (thanks Cypress), distributed under a license that lets you get some work done. Just like regular Linux, embedded systems are good software for clueful people.
An embedded system doesn't need system administration.
It comes with the application pre-installed. You don't have to install additional software to get something done.
It's responsive. Many embedded systems have formal real-time requirements, but even those that don't at least don't make you wait for silly things like fdisk.
It interfaces with the real world, not just the network and a carpal-tunnel-slaying keyboard and mouse.
It can't be reasoned with! It doesn't feel pity, remorse or fear!
And it absolutely will not stop, ever, until you are dead!
No, wait, the last two are “The Terminator”, not all embedded systems. But you get the idea. Embedded systems are what software wants to be when it grows up, and “regular Linux” is headed in the same direction.
Don Marti is technical editor of Linux Journal.
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.View Now!
|The Firebird Project's Firebird Relational Database||Jul 29, 2016|
|Stunnel Security for Oracle||Jul 28, 2016|
|SUSE LLC's SUSE Manager||Jul 21, 2016|
|My +1 Sword of Productivity||Jul 20, 2016|
|Non-Linux FOSS: Caffeine!||Jul 19, 2016|
|Murat Yener and Onur Dundar's Expert Android Studio (Wrox)||Jul 18, 2016|
- The Firebird Project's Firebird Relational Database
- Stunnel Security for Oracle
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- Managing Linux Using Puppet
- SUSE LLC's SUSE Manager
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Google's SwiftShader Released
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide