Video Category - Page 294 of 331 - CNX Software

January 17, 2013January 17, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Debugging Embedded Linux (Kernel) Power Management – ELCE 2012

Tero Kristo, Linux kernel developer at Texas Instruments, explains how to debug power management in Embedded Linux at ELCE 2012. Abstract: The presentation will talk about debugging various problems a kernel developer can face when working with power management. These include hardware related issues (IC / HW layout bugs, bad documentation) and software related (kernel bugs, driver problems, adding new kernel features, bad userspace behavior.) Along with presenting some of these problems, I will discuss about ways to debug these… power management typically requires specific tools to be used. I will base the discussion on my first hand experience from working with Linux PM. Target audience is (kernel) software developers interested in power management. The presentation is divided into 3 sections: Debugging tools / methods for PM Disabling kernel features Stress testing Tracing (printk / low level UART) GPIO / LED trace Debugger Buffered traces / statistics with trace-cmd & […]

January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

ARM 64-Bit Bootstrapping with OpenEmbedded – ELCE 2012

Marcin Juszkiewicz, software engineer at Canonical, explains how ARMv8 was bootstrapped with OpenEmbedded with fast model simulation at the Embedded Linux Conference in Barcelona on November 7, 2012. Abstract: The time has come – there is ARM 64-bit architecture right behind a corner. In this talk I will present how OpenEmbedded was used to build root filesystem for fast models simmulating not-yet-existing hardware. Presentation is targeted at developers interested in cross compilation, handling new architectures in existing projects. Agenda of the talk: Introduction to Aarch64 – aka arm64 or ARMv8, the new 64-bit version of the ARM architecture Introduction to OpenEmbedded – Build system capable to build everything from package to whole distribution with repositories First steps: Create own layer for AArch64 stuff Adding basic support into OE classes Machine definition Toolchain – Based on gcc 4.7 + ARM patches Build results – As of October 2012, 800 packages have […]

January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Qt on Embedded Systems – ELCE 2012

Lars Knoll, chief maintainer for the Qt Project, gives a presentation about Qt on embedded systems, including a demo with the Raspberry Pi at the Embedded Linux Conference Europe 2012 in Barcelona, Spain. Abstract: For well over 10 years, Qt has been used in many types of embedded devices, ranging from high-end medical systems, through mobile phones and smartphones, all the way to simple devices like coffee makers. This presentation will show some of the work that has been put in Qt throughout the years to support embedded devices, some of the challenges that the development team faced in order to bring a fully-featured desktop toolkit to resource-limited devices, along with solutions they came up with. Time permitting, the presenter will also show Qt demos running on an embedded device. This session is intended for embedded application developers looking to make use of the capabilities of recent hardware, as well […]

January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

BoFs: Developer Tools and Methods: Tips & Tricks – ELCE 2012

Tim Bird, senior staff software engineer at Sony Network Entertainment, hosts a BoF session about tools & methods for embedded Linux developers at ELCE 2012. Abstract: In this Birds-of-a-Feather-session, Tim will share some of his favorite tips for developing embedded Linux software. This will include tips for using ‘git’, how he does multi-platform development, and tips for other tools that other developers might find useful. Prior to the event, Tim will do a survey and solicit ideas from other developers as well. Please come to this BoF prepared to share your own productivity tips for embedded Linux development. Tim talks is divided into the following key points: Git tips – How to finds info about commits (git log, git show), use aliases (e.g. for colored output), find a commit that caused problem (git bisect), and more Patch management – quilt patch managing tool, diffinfo, and splitpatch (to break patches apart) […]

January 16, 2013January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Barebox Bootloader Status Update – ELCE 2012

Sascha Hauer, kernel developer at Pengutronix, gives an update about the status of Barebox bootloader at the Embedded Linux Conference 2012 in Barcelona, Spain. Abstract: Booting Linux is still a hot topic on embedded systems. It has been 3 years since the last presentation about Barebox at ELC-E, and the barebox community has grown and developed many new and unique features during that time. The talk gives an update on the status of barebox, including MMU support, compressed images, menu system, automouter, tftp, nfs filesystem, USB updating techniques and other goodies. The presentation is for kernel porters who need a robust, flexible,extensible and well structured tool to bring up Linux on embedded hardware. It is equally suitable for new and experienced barebox users. Agenda of the talk: Tour through Barebox – Basic hardware initialization (SDRAM, clocks), Startup, User Interface, Start operating system, Update and Initial hardware bring-up. Devicetree support Multi-platform […]

January 16, 2013January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Upgrading Embedded Linux Without Bricking – ELCE 2012

Arnout Vandecappelle, senior embedded software architect at Essensium/Mind, talks about ways to greatly decrease the risk of bricking your board/device during upgrade thanks to gubies scripts and tools at the Embedded Linux Conference in Barcelona, Spain, on November 6, 2012. Abtract: Embedded systems are often modified remotely, e.g. to upgrade the firmware or change the configuration. This may however break the system and render it inaccessible, which is a major problem if the device is hard to reach physically. Unfortunately, no catch-all failsafe solution exists to make sure that the device stays accessible remotely even if a modification goes wrong. Instead, the possible failures have to be anticipated and covered. This talk discusses some of the frequently occurring failures, how they can be detected and handled. These include power failure, kernel crashes, network failure and data corruption. We include examples of concrete use cases. Finally, there is room for discussion about […]

January 16, 2013January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

The End of Embedded Linux (As We Know It) – ELCE 2012

Chris Simmonds, freelance consultant and trainer (2net ltd), discusses the future of embedded Linux now that storage and processing power are no longer an major issue, and try to find the best Linux platform for embedded systems at ELCE 2012. Abstract: Embedded Linux is at a cross roads where the combination of Moore’s law making devices more powerful and the mass production of consumer devices, especially mobile, making them cheaper means that the old ways no longer work. Only a few years ago we though in mega: MHz, MBytes, MBits/s. Now we have to think in giga. The days of the single core CPU are almost over, as are the days of the QVGA display. All this means that there is a need to re-think how embedded devices are programmed. Two obvious roads lie ahead: Android and Ubuntu (or other desktop operating system of your choice). This talk considers the […]

January 16, 2013November 23, 2014 by Jean-Luc Aufranc (CNXSoft) - No Comments

Understanding PREEMPT_RT (The Real-Time Patch) – ELCE 2012

Steven Rostedt, working at Red Hat, talks about Real-Time Linux at the Embedded Linux Conference Europe, in Spain on November 6, 2012. Abstract: The real-time patch (which provides CONFIG_PREEMPT_RT), has been around since 2005. Started by Ingo Molnar and maintained by Thomas Gleixner and several others, it has grown from a hobby RTOS into a very serious contender. Several distributions (Red Hat, SuSE, Debian, Ubuntu) supply a kernel version that includes this patch. The embedded world has started adding the -rt patch to their own devices that they ship. But do the embedded developers understand what the -rt patch supplies? Programming for real time, and especially when writing kernel code requires special knowledge to avoid real time traps. This talk will explain what the real time patch provides and special programming tips that will ensure embedded developers will get the best from their devices. He goes through the following key […]