Category: Programming

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Embedded Linux Conference 2012 Schedule

Embedded Linux Conference 2012 Schedule

The Embedded Linux Conference (ELC 2012) will take place on February 15 – 15, 2012 at Hotel Sofitel in San Francisco. ELC consists of 3 days of presentations, tutorials and sessions. There will be over 50 sessions during those 3 days. I’ll highlight a few sessions that I find particularly interesting. February 15 10:30 – 11: 30 – Profiling and Performance Measurement Techniques Using Linux Kernel Tools by Govindraj Raja, Software Engineer at Texas Instruments and Partha S Basak, Technical Manager at Texas Instruments. With ever growing features and functionality of Linux kernel, one needs methods to trace and profile parts of Linux kernel for various reasons like performance analysis, debugging etc. This presentation aims at providing an insight into few of these tools and their salient features. Supporting use case data as captured on open source OMAP4 pandaboard is also provided. 14:00 – 15:00 – The Yocto Project Overview […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 25 Comments on Cross-compiling libavg 1.7 for ARM on Debian

Cross-compiling libavg 1.7 for ARM on Debian

libavg is a high-level development platform for media-centric applications using Python as scripting language and written in C++ and I’ve already written a post to cross-compile libavg 1.6 in Ubuntu (with linaro cross toolchain) and using Beagleboard qemu image. Since I’ve doing some preparation work to have software running on the Raspberry Pi and that the latter won’t support Ubuntu, I’ve had to cross-compile it again. This time, I’ve found a cleaner way to do the cross-compilation with dpkg-cross and xapt tools which can load the required armel package to the arm toolchain. Those tools really make life easy, as previously (a few years ago), I would have had to cross-compile all dependencies manually. Here are the steps I followed: Install Emdebian ARM Cross Toolchain and Tools in Debian. Download libavg 1.7 source code

Extract it

Install the following armel development packages: sudo /usr/share/pdebuild-cross/xapt -a armel libpango1.0-dev libavformat-dev […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 1 Comment on MIPS Releases Android NDK 7m

MIPS Releases Android NDK 7m

MIPS has just announced the release of the Android Native Development Kit version 7. It has the same APIs as the Android NDK revision 7 released in November 2011 (for Android 4.0), but adds support for MIPS architecture and the MIPS ABI . The NDK is available for Windows, Linux and MacOS. The NDK allows developers to use C/C++ code either to reuse existing C/C++ code or to improve the performance over code developed with Java. Note that MIPS states that “using native code does not result in an automatic performance increase, but always increases application complexity. If you have not run into any limitations using the Android framework APIs, you probably do not need the NDK.” The NDK can be downloaded for: Windows Linux Mac You’ll also have to download the Android MIPS SDK, if you want to use the NDK. Strangely, the Mac SDK is not available for […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Android Training & Tutorials

Android Training & Tutorials

The Android team just announced the launch of Android Training a collection of classes aimed at helping developers to build better Android applications. Each class explains the steps required to solve a problem, or implement a feature, with code snippets and sample code. They’ll add more materials over time, but right now developers can already learn (more) about the following topics: Designing for Multiple Screens Improving Layout Performance Managing Audio Playback Optimizing Battery Life Remembering Users Sharing Content Capturing Photos Maintaining Multiple APKs Developing for Enterprise Monetizing Your App Designing Effective Navigation There are currently 34 lessons on all those topics, and most include code samples such as the News Reader  (Designing for Multiple Screens). You can get started immediately by visiting Android Training page. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Qt Labs Releases Qt 4.8.0

Qt Labs Releases Qt 4.8.0

Qt Labs has just announced the release of Qt 4.8.0 featuring Qt Platform Abstraction, threaded OpenGL support, multithreaded HTTP and optimized file system access. Here are some of the new key features  in Qt 4.8.0: Qt Platform Abstraction (QPA) QPA restructures the GUI stack to enable easier porting of Qt to different windowing systems and devices. Previously called Lighthouse. Threaded OpenGL supportEnables developers to render OpenGL from more than one thread concurrently. See Threaded OpenGL in 4.8 for more details. Multithreaded HTTP HTTP requests are now handled in a separate thread by default. This should make application guis smoother, as networking will no longer use the main event loop. Optimized file system access The file system stack received some heavy lifting under the hood. The result is better I/O performance, achieved by reducing the number of system calls performed for I/O and by better use of cached data, when available. […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on AnDevCon III: Android Developer Conference – 14-17 May 2012

AnDevCon III: Android Developer Conference – 14-17 May 2012

The Android Developer Conference III will take place in San Francisco on 14-17 May 2012. This technical conference is exclusively reserved to Android developers and provides classes, workshops and keynotes related to Android development. There will also be an exhibition hall where Android apps and development tools will be showcased. The workshops and classes schedule does not appear to be available just yet for AnDevCon III, but the different sessions will be organized into five subject area: Developer Essentials: These technical classes and workshops are for all Android developers and cover all programming topics. Android Enterprise: These technical sessions cover topics specific to building and managing apps for employees, business customers and partners, such as back-end integration corporate data center communications, ERP or CRM systems. Android Business: These classes and workshops are for entrepreneurial developers who want to learn the most effective ways of distributing and selling Android apps, including […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 4 Comments on Qt Quick QML Digital Signage Demo Part 2

Qt Quick QML Digital Signage Demo Part 2

Following up on Qt Quick QML Digital Signage Demo Part 1, I’ve updated the digital signage demo to support the following: Play 5 videos in a loop Display 5 pictures in a loop where the picture is changed every 5 seconds Use a (twitter) RSS feed for the scrolling text I initially planned to use QML to list the media files, but it is apparently not possible without using C/C++ and I may do it later on. So instead, I hard-coded the video and picture playlists in the QML files with the ListModel element. Videos are located in the video directory and pictures in the pic folder. An index is needed to scroll thru the playlist, but QML does not support global variables, so I created a JavaScript file (globals.js) to store the video and picture index: // Global variables in JavaScript file var iVideoIndex = 0 var iPicIndex = […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on Design West Summit – 26-29 March 2012

Design West Summit – 26-29 March 2012

UBM Design announced the schedule and pass pricing for Design West Summit (previously Embedded System Conference) which will now bring 7 summits in one location (San Jose McEnery Convention Center) on 26-29 March 2012: Embedded Systems Conference & Exhibition –  Conference Dates:  March 26 – 29, 2012.  Exhibition Dates:  March 27-29, 2012. (See Details below) Android Summit – March 28, 2012 –  Everything Android  from embedded design to Apps development. Android Certification Program Android Speed Training Android Fundamentals Course on the Expo Floor Android Conference Program Multicore DevCon– March 27 & 28, 2012 – Embedded multicore and multimedia. 7th annual Multicore Conference Courses Multicore Expo Floor Zone Multicore Fundementals Courses Keynote Addresses Industry Addresses Expo floor parties and giveaways BlackHat – March 29, 2012 – One-day conference focused on security in embedded systems. Security Fundementals Course Black Hat Summit Conference Courses Security focused presentations in the expo floor theater Keynotes […]