qemu News - Page 5 of 6 - CNX Software

November 9, 2011November 9, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Tuning Linux For Embedded Systems – ELCE 2011

Darren Hart, Intel’s Open Source Technology Center, gives a 5 step method to optimize Linux (image size, memory footprint and boot time) for embedded systems at Embedded Linux Conference Europe 2011. Abstract: Although embedded systems are less and less resource constrained, there is still a lot of demand for minimizing the image size, runtime memory usage, and boot time. The firmware, kernel configuration, hardware initialization, boot-time arguments, start-up scripts, and library sizes are all examples of things with a direct impact on your image size and/or boot time. There are several core processes involved with minimizing the size of an image, which has a direct impact on runtime memory usage and boot time. The focus is on configuration techniques that get you most of the way there and follow-up with source-level customizations that get you the rest of the way. You can also download the presentation slides. Jean-Luc Aufranc (CNXSoft)Jean-Luc […]

November 4, 2011November 4, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Linaro 11.10 Release with Linux Kernel 3.1

Linaro has just released version 11.10 based on Linux Kernel 3.1. Here are the highlights of the release: Android Audio playback and recording works on LEB-panda. TJBench into all Android builds benchmarked against the original Android libjpeg implementation: TomGall/LibJpegTurbo All strict-aliasing violations in 2.3.5 have been fixed and sent to AOSP. (for build optimization) Linaro Gerrit is integrated with Android Build Service for change verification as part of Continuous Integration effort. Tip toolchain tracked and released against all targets for 11.10. iMX53 will now boot with a 3.0 or later Android Kernel. The multimedia test application has been extended to cover encoding and give better benchmark results. Linaro’s Android distribution can now base builds off a tip toolchain build. Linaro’s 11.09 toolchain has been benchmarked. USB camera (UVC) now works on linaro-android builds. Developer Platform The Linux Linaro packages are now generated and validated in a continuous integration loop. New […]

November 4, 2011November 14, 2011 by Jean-Luc Aufranc (CNXSoft) - 27 Comments

Xibo Digital Signage on ARM (Full Version)

Last month, I wrote a post showing how to run Xibo Open Source Digital Signage in a BeagleBoard/Overo emulator. That version could communicate with Xibo server, download the required files, display pictures and (maybe) play videos with the real hardware. However, it had serious limitation as Text, RSS and web pages could not be displayed. I’ve now fixed those issues and the full Xibo 1.3.1 can run on ARM platform. First, you need to follow the instructions given in Xibo Digital Signage on ARM (Beagleboard / Overo), although we’ll need to modify something with libavg compilation (see below). Then cross-compile berkelium for ARM using Linaro toolchain. Add libbrowser-node to libavg plugin directory and build libavg again. Also copy the Berkelium header files in to src/test/plugin (i.e. src/test/plugin/berkelium) or add the include file path to CFLAGS/CXXFLAGS.

bzr branch lp:~browsernode-team/+junk/berkelium-browsernode
cp berkelium-browsernode/plugin/* ~/edev/beagleboard/libavg-1.6.0/src/test/plugin
cd ~/edev/beagleboard/libavg-1.6.0
make
make install

bzr branch lp:~browsernode-team/+junk/berkelium-browsernode

cp berkelium-browsernode/plugin/* ~/edev/beagleboard/libavg-1.6.0/src/test/plugin

cd ~/edev/beagleboard/libavg-1.6.0

make

make install

Create libberkeliumwrapper.so:

cd ~/edev/beagleboard/libs/lib
touch a.cpp
arm-linux-gnueabi-g++ -c a.cpp -o a.o
arm-linux-gnueabi-g++ a.o  -shared -L/home/jaufranc/edev/beagleboard/berkelium -llibberkelium -o libberkeliumwrapper.so

cd ~/edev/beagleboard/libs/lib

touch a.cpp

arm-linux-gnueabi-g++ -c a.cpp -o a.o

arm-linux-gnueabi-g++ a.o -shared -L/home/jaufranc/edev/beagleboard/berkelium -llibberkelium -o libberkeliumwrapper.so

Copy the required files to the qemu image: sudo mount -o […]

October 18, 2011April 9, 2018 by Jean-Luc Aufranc (CNXSoft) - 52 Comments

Raspberry Pi Emulator in Ubuntu with Qemu

The Raspberry Pi board is a low cost board based on Broadcom BCM2835 media processor SoC with an ARM1176JZF-S core clocked at 700MHz. This board is currently under development and should be ready by end of November, beginning of December and will be sold for 25 USD (128MB RAM – no Ethernet) and 35 USD (256MB RAM – Ethernet). While we are waiting for the board, we can still test software using qemu to emulate a board based on an ARM1176 core with 128MB or 256 MB memory. I’ve tried to create a rootfs based on Ubuntu with rootstock but this only support processors with ARM cortex A8 and greater, so it would not work with ARM11. I’ll be using Debian Squeeze instead. Prerequisites My host computer is running Ubuntu 10.04.3 LTS, but any recent Ubuntu or Debian installation should work with these instructions. [Update: You won’t be able to […]

October 15, 2011January 20, 2012 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Cross-compiling Berkelium (and Chromium) for ARM

Berkelium is a BSD licensed library that provides off-screen browser rendering via Google’s open source Chromium web browser. It takes advantage of Chromium’s multiprocess rendering to isolate browsers from each other and can render to any buffer in memory. The user of the library can inject input and javascript code into web pages to control them, as well as listen for events generated by the page such as navigation events, load sequence events and paint events. Berkelium provides a small API for embedding a fully functional browser into any application. This library is used by Xibo Digital Signage Player python client. I’ll give the instructions I followed to build Berkelium and Chromium for ARM. For now the build works, but I have a problem running berkelium in the emulator. First, you’ll need to install some tools and the development version of some libraries: sudo apt-get install git-core subversion cmake doxygen […]

October 12, 2011October 12, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Generate a Custom ARM Rootfs Easily with Rootstock

You may need to generate your own rootfs for your ARM target board, but do not want to cross-compile all libraries manually. You can achieve this with rootstock, a utility that generates Ubuntu armel rootfs tarballs and/or qemu image, to be uncompressed onto a root device. First install roostock: sudo apt-get install rootstock Then generate a rootfs with the required libraries: sudo rootstock –fqdn beagleboard –login cnxsoft –password temppasswd \ –imagesize 3G –seed xfce4,gdm,pkg-config,python,perl,g++,bison,flex,\ gperf,libnss3-dev,libgtk2.0-dev,libnspr4-0d,libasound2-dev,libnspr4-dev,\ libgconf2-dev,libcairo2-dev,libdbus-1-dev,libstdc++6-4.5-dev,libexpat1-dev,\ libxslt1-dev,libxml2-dev,libbz2-dev –dist natty Here are the details of the command line parameters: –fqdn: Hostname to be used for the target system –login: Login ID of the admin user created during setup –password: Password of the admin user created during setup –imagesize: Size of the target filesystem to be created (default 1GB) –seed: List of packages to install –dist: Specify Release to build (jaunty, karmic, lucid, maverick or natty) Alternatively you could also use an […]

October 4, 2011January 18, 2012 by Jean-Luc Aufranc (CNXSoft) - 33 Comments

Xibo Digital Signage on ARM (Beagleboard / Overo)

Xibo (pronounced eX-E-bO) is an open source, multi-display, multi-zone, fully scheduled digital signage solution written in Python (there is also a dotnet version). This is a client /server solution that can run on Windows or Linux. If you are not familiar with Xibo you can visit http://xibo.org.uk/ or/and read my introduction XIBO: An Open Source Digital Signage Server/Client. Since I had not seen digital signage solution running on low cost ARM development platform such as Beagleboard, Pandaboard or Origen, I decided to give the Xibo python client a try using qemu to emulate Gumstix Overo COM (OMAP 3530). Porting Xibo to ARM could provide several benefits compared to x86 platform: Lower hardware cost Lower power consumption (and electricity bill) Smaller form factor allowing easier integration in displays and in transportation (e.g. buses, subway trains). Easier to implement new digital signage features such as touch screen support, 3G connectivity, location based […]

October 4, 2011October 4, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Android Developer Conference: DroidCon 2011 Schedule

DroidCon UK will be held for two days (October 6th & 7th 2011) at the Islington Design Center in London and boasts to be United Kingdom’s largest Android-only developer conference. Here’s the program for day 1 (6th of October): 9:00 Barcamp Talks will be selected by attended among the following proposals: From Publisher to Platform – the role of OpenSource in engaging with developers by Oscar Clark, Papaya Mobile. Reality of Mobile Advertising by Terence Eden, Inmobi. OpenGLES2 & Android QEMU Emulator by Jonathan White and Jose Commins, Accenture. Enhancing User Experience with HTC: 3D, Pen, and Audio Lance Nanek, HTC. Cisco Workshop by Marcus O’Sullivan, Cisco. OpenGL & NDK by Ashraf Hegab, Orange. Fed up with trying to make pay per download pay back? Try API revenue share by James Parton, o2. (Re)Branding Headache? Here’s your Pain Killer by Joana Cruz e Costa, Masabi. Smooth and User Friendly UI […]