Linux Category - Page 545 of 554 - CNX Software

February 10, 2011August 31, 2011 by Jean-Luc Aufranc (CNXSoft) - 25 Comments

Emulate an ARM Plaform with QEMU on Ubuntu 10.10

When developing software for embedded systems, you may need to support multiple architectures such as arm, mips, x86, powerpc, alpha etc.. but you may not have the hardware required on hand to test them. This is where QEMU – a processor emulator – comes to the rescue. In a way, QEMU is similar to VirtualBox, VMWare or Citrix Xendeskop except it can support multiple architectures. I’ll show how to run Debian Lenny ARMEL in QEMU on a computer running Ubuntu 10.10 (aka Ubuntu Maverick Meerkat). QEMU (Qemu-kvm) Installation First install qemu-kvm and qemu-kvm-extras (the latter contains qemu-system-arm): sudo apt-get install qemu-kvm qemu-kvm-extras Let’s check qemu version: jaufranc@CNX-TOWER:~/edev$ qemu –version QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008 Fabrice Bellard Debian ARM Installation in QEMU Create a directory to store the required files for the emulator and download the Debian Lenny ARMEL kernel (vmlinuz) and debian installer rootfs (initrd.gz): mkdir […]

February 9, 2011February 9, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Ziilabs ZMS-05 and ZMS-08 SDK and Development Boards

Ziilabs (originally 3DLABS) is Singapore company, subsidiary of Creative Technology, that provides media application processors for consumers electronics and has offices in the UK, China, USA and Singapore. Ziilabs Media Processors Overview Ziilabs has two media processors: ZMS-05 – A Low Power HD Programmable Media Rich Processor based on two ARM9 core (ARM9-EJS) mainly aimed at smartphones and tablets with the following media capabilities: High compute density SIMD architecture High resolution – decode to 1080p / 720p encode Simultaneous video encode/decode at D1 Wide rage of optimised CODECs and APIs Accelerated OpenGL ES 3D graphics Hardware compositing Advanced image processing 8 GFlops programmable compute ZMS-08 – A HD Media Rich Applications Processor based on an ARM Cortex A8 running @ 1GHz mainly aimed at media players, set-top boxes and digital signage solutions with the following media capabilities: Blu-ray Quality 1080p H.264 Video Decode 1080p H.264 Video Encode 720p H.264 Video […]

February 8, 2011July 17, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Texas Instruments OMAP 5 based on ARM Cortex A15 Core

Texas Instruments announced its new generation of mobile chips OMAP 5 based on the latest ARM core Cortex A15. Press release excerpt: DALLAS (Feb. 7, 2011) /PRNewswire/ — Texas Instruments Incorporated (TI) (NYSE: TXN) announced today the next generation of its popular OMAP™ family: the OMAP 5 mobile applications platform, which is positioned to transform how mobile devices, such as Smartphones, tablets and other mobile form factors are used, making them even more valuable in our daily lives. … The 28 nanometer OMAP 5 applications processors carry on the OMAP family tradition of delivering significant increases in performance and functionality, while lowering power consumption compared to their predecessors. Specifically, they offer up to 3x processing performance and five-fold 3D graphics improvement, yet provide a nearly 60 percent average power reduction compared to a sample user experience on the OMAP 4 platform. Additionally, the OMAP 5 platform’s software is designed for […]

February 7, 2011February 7, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Running .NET applications on Linux Embedded Systems

You may have some applications developed using Microsoft .NET application framework that are running on Windows XP, Windows Vista and Windows 7. .NET for Linux If after spending much effort and time, you have a request to port your application to Linux, you don’t need to rewrite everything thanks to Mono, an open source implementation of .NET framework that can be run in Windows, Linux and MacOS. The development framework is composed of three parts: Mono – An open source, cross-platform, implementation of C# and the CLR that is binary compatible with Microsoft.NET MonoDevelop – An open Source C# and .NET development environment for Linux, Windows, and Mac OS X Mono Tools for Visual Studio – Development Tools to develop and migrate .NET applications to Mono on Linux without leaving Visual Studio. This application can be tried for 30 days and / or purchased. This tools is compatible with Visual […]

February 4, 2011February 5, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Folders and Files Comparison in Linux with Meld

Beyond Compare and Winmerge are tools that can be used to compare files in Windows, but the latter is not available in Linux and the former is only available as a commercial application. One alternative is to use Meld, a diff and merge tool for Linux. This open source program is a GUI for diff2 and diff3 written using pygkt toolit based on Python, Glade and GTK+. This is not as powerful as the two programs aforementioned, but still very useful. It can also compare 3 files at the same time. To install it in ubuntu: sudo apt-get install meld It will still allow you to compare files, directory and merge changes. The file comparison merge function is a little confusing at first, but after a while you’ll get used to it. Meld can also support version control comparison with CVS, SVN, GIT, Bazaar-ng or Mercurial. Jean-Luc Aufranc (CNXSoft)Jean-Luc started […]

February 4, 2011May 12, 2017 by Jean-Luc Aufranc (CNXSoft) - 23 Comments

Cross-compiling Python for MIPS and ARM Platforms

Python programming language is used in several open source projects such as Sugar OS and Xibo. Let’s see if we can cross-compile it in Ubuntu 10.10 using a mips compiler. I’ll use the instructions given at http://randomsplat.com/id5-cross-compiling-python-for-embedded-linux.html. Let’s download Python 2.7.1 first and extract the source code:

tar xjvf Python-2.7.1.tar.bz2

1	tar xjvf Python-2.7.1.tar.bz2

Then run the following command in Python-2.7.1 in order to build some tools for the host:

./configure
 make python Parser/pgen
 mv python hostpython
 mv Parser/pgen Parser/hostpgen
 make distclean

./configure

make python Parser/pgen

mv python hostpython

mv Parser/pgen Parser/hostpgen

make distclean

There is no patch for Python 2.7.1 cross-compilation in the link above, so let’s just try to configure and build it:

CC=mipsel-linux-gcc CXX=mipsel-linux-g++ AR=mipsel-linux-ar RANLIB=mipsel-linux-ranlib ./configure --host=mipsel-linux --target=mipsel-linux --prefix=/python
make HOSTPYTHON=./hostpython HOSTPGEN=./Parser/hostpgen BLDSHARED="mipsel-linux-gcc -shared" CROSS_COMPILE=mipsel-linux- CROSS_COMPILE_TARGET=yes

CC=mipsel-linux-gcc CXX=mipsel-linux-g++ AR=mipsel-linux-ar RANLIB=mipsel-linux-ranlib ./configure --host=mipsel-linux --target=mipsel-linux --prefix=/python

make HOSTPYTHON=./hostpython HOSTPGEN=./Parser/hostpgen BLDSHARED="mipsel-linux-gcc -shared" CROSS_COMPILE=mipsel-linux- CROSS_COMPILE_TARGET=yes

If we don’t use a patch the first error is:

Include/pyport.h:243:13: error: #error "This platform's pyconfig.h needs to define PY_FORMAT_LONG_LONG"

1	Include/pyport.h:243:13: error: #error "This platform's pyconfig.h needs to define PY_FORMAT_LONG_LONG"

So I used some older patch to create a new patch: http://www.cnx-software.com/patch/python-2.7.1-cross-compile.patch. You can download it an apply it as follows:

patch -p1 < python-2.7.1-cross-compile.patch

1	patch -p1 < python-2.7.1-cross-compile.patch

And repeat the step above to configure and cross-compile Python for mips. Finally install Python in ~/Python-2.7.1/install for example:

make install HOSTPYTHON=./hostpython BLDSHARED="mipsel-linux-gcc -shared" CROSS_COMPILE=mipsel-linux- CROSS_COMPILE_TARGET=yes prefix=~/Python-2.7.1/install

1	make install HOSTPYTHON=./hostpython BLDSHARED="mipsel-linux-gcc -shared" CROSS_COMPILE=mipsel-linux- CROSS_COMPILE_TARGET=yes prefix=~/Python-2.7.1/install

After that copy all necessary files in ~/Python-2.7.1/install to your […]

February 2, 2011February 2, 2011 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Ayuda Splash Digital Signage Player Becomes Open Source

Ayuda Media Systems announced OpenSplash – a free, open source digital signage player at ISE 2011. Press Release Excerpt: Ayuda Media Systems (“Ayuda”) announced today at ISE 2011 that it will be open sourcing its Splash Digital Player. Dubbed “OpenSplash”, it is a free, multi-platform open source player that can be driven by any content management and scheduling system. “Offering a free, open source media player will enable a new wave of innovation in the signage industry” said Andreas Soupliotis, President & CEO of Ayuda. “There are a multitude of software vendors in the space that basically all do the same thing – push content from a content management system (CMS) to a network of players. Some do it a little better than others but the differentiation of identity is just not there. If there were a standard open software player that the industry rallied behind then everyone could focus […]

January 26, 2011January 26, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

OLPC XO 1.75 Hardware, Firmware and Software

OLPC demo’ed their 3rd generation laptop – OLCP XO 1.75 – based on Marvell Armada 610 at CES 2011. The good thing about this platform is that they opened most of it including the hardware, the software and for the first time the firmware. However, I found out it’s not so easy to find the hardware / software development information and source on the OLPC site, so I’ve decided to make a summary and provide links to the hardware, firmware and software for OLPC XO 1.75. OLPC XO 1.75 Hardware The XO-1.75 is powered by Marvell Armada 610 CPU (88AP610) with an ARM core clocked at 1Ghz. It has 1GB DDR3 SDRAM, 4GiB NAND Flash, a TFT display, an SD Card slot, Wi-Fi, a few USB ports and a camera. I believe the touchscreen is not part of the current hardware, but the block diagram below should be close to […]