arm News - Page 84 of 89 - CNX Software

October 6, 2011October 6, 2011 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Dropbear: Lightweight SSH Server / Client

You may need to remotely access your embedded device, or your embedded systems is simply headless. You could use telnet, but this is insecure. A secure way to access a device remotly is to use SSH protocol. OpenSSH is one implementation but this is relatively too large and may use uncesary space on a device with limited storage. That’s where Dropbear comes into play. Dropbear is a lightweight implementation of an SSH client and server and is ideal for embedded systems. Dropbear ARM executable is only 200 KB. Here’s how it’s described on its website: Dropbear is a relatively small SSH 2 server and client. It runs on a variety of POSIX-based platforms. Dropbear is open source software, distributed under a MIT-style license. Dropbear is particularly useful for “embedded”-type Linux (or other Unix) systems, such as wireless routers. The main features of dropbear: A small memory footprint suitable for memory-constrained […]

October 6, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Cross-comping zlib for ARM target

Zlib is defind as “A Massively Spiffy Yet Delicately Unobtrusive Compression Library” and used in many projects requiring compression. Here are the instructions cross-compile zlib for ARM: Download zlib1.25 wget http://cdnetworks-kr-2.dl.sourceforge.net/project/libpng/zlib/1.2.5/zlib-1.2.5.tar.gz Extract it tar xzvf zlib-1.2.5.tar.gz cd zlib-1.2.5 Configure, build and install zlib. CC=armv5tel-redhat-linux-gnueabi-gcc ./configure –prefix=/home/jaufranc/edev/rootfs make make install This will install libz.a (static library) and libz.so (dynamic library) in /home/jaufranc/edev/rootfs/lib and copy the header files to /home/jaufranc/edev/rootfs/include. 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 daily news, and reviews full time later in 2011. www.cnx-software.com

October 6, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Installing an ARM Toolchain in Fedora

You can easily install an arm cross-compiler on Fedora as follows: cd /etc/yum.repos.d/ sudo wget http://ftp.linux.org.uk/pub/linux/arm/fedora/cross/cross.repo sudo yum install armv5tel-redhat-linux-gnueabi-gcc You can check the installation worked by checking the cross-compiler version [jaufranc@localhost ~]$ armv5tel-redhat-linux-gnueabi-gcc -v Using built-in specs. Target: armv5tel-redhat-linux-gnueabi Configured with: ../configure –prefix=/usr –mandir=/usr/share/man –infodir=/usr/share/info –enable-shared –enable-threads=posix –enable-checking=release –with-system-zlib –enable-__cxa_atexit –disable-libunwind-exceptions –enable-languages=c,c++ –disable-libgcj –with-sysroot=yes –enable-version-specific-runtime-libs –target=armv5tel-redhat-linux-gnueabi Thread model: posix gcc version 4.1.2 20070925 (Red Hat 4.1.2-33.fa1) This will only install the C compiler (gcc), to install the C++ compiler, run the following command: sudo yum install armv5tel-redhat-linux-gnueabi-gcc-c++ Tested in Fedora 12. 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 daily news, and reviews full time later in 2011. www.cnx-software.com

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 3, 2011October 20, 2011 by Jean-Luc Aufranc (CNXSoft) - 12 Comments

Cross Compiling libavg for ARM

libavg is a high-level development platform for media-centric applications using Python as scripting language and written in C++. Bear in mind that are many dependencies with libavg 1.6. I have not built all the libraries required, but instead simply taken the pre-built binaries and header files in the qemu overo image and copied the files as follows: mkdir mnt sudo mount -o loop,offset=$[106496*512] overo_sd_alip.img mnt mkdir ~/edev/beagleboard/libs/lib -p mkdir ~/edev/beagleboard/libs/include cp mnt/usr/lib/* ~/edev/beagleboard/libs/lib/ -rf -d cp mnt/lib/* ~/edev/beagleboard/libs/lib/ -rf -d cp /mnt/usr/include/* ~/edev/beagleboard/libs/include -rf -d sudo umount mnt The -d flag skips the symlink, so we need to recreate then for all library so that the compiler can find libname.so instead of libname.so.12. Save the following scripts to symlinks.sh:

#!/bin/sh
liblist=`ls *.so.??`
for f in $liblist
do
  echo $f
  fileres=`echo $f | sed 's/\..\{2\}$//'`
  ln -s $f $fileres
done
liblist=`ls *.so.?`
for f in $liblist
do
  echo $f
  fileres=`echo $f | sed 's/\..\{1\}$//'`
  ln -s $f $fileres
done

#!/bin/sh

liblist=`ls *.so.??`

for f in $liblist

echo $f

fileres=`echo $f | sed 's/\..\{2\}$//'`

ln -s $f $fileres

done

liblist=`ls *.so.?`

for f in $liblist

echo $f

fileres=`echo $f | sed 's/\..\{1\}$//'`

ln -s $f $fileres

done

and run it where the arm libraries are located (in my case in /home/jaufranc/edev/beagleboard/libs/lib, /home/jaufranc/edev/beagleboard/libs/lib/arm-linux-gnueabi and /home/jaufranc/edev/beagleboard/libs/lib/mesa). This will create symlinks for most libraries, but not all. Some will still […]

October 3, 2011October 20, 2011 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Cross-Compiling Mesa 3D Graphics Library for ARM

Mesa is an open-source implementation of the OpenGL specification that can be used for software emulation or complete hardware acceleration for modern GPUs.The Mesa library is used by a variety of games (e.g. Quake 2.3), libraries (e.g PyOpenGL), science and technical applications and utilities (e.g. xscreensaver). MesaLib requires X11 libraries. I’ll assume those are already cross-compiled here. For this build, I used pre-built X11 libraries found in ALIP (ARM Internet Platform) binaries. I used the method described here and copied the libs in /lib and /usr/lib and header files in /lib/include found in the qemu overo image respectively to /home/jaufranc/edeve/beagleboard/libs/lib and /home/jaufranc/edeve/beagleboard/libs/include. make sure you use the “-d” with cp to avoid copying the symlinks or some symbolic links would point to x86 binaries or files that do not exist. Here are the instructions to cross-compile MesaLib 7.11 for ARM using arm-linux-guneabi-gcc: Download the latest version of Mesa source code: […]

October 3, 2011August 15, 2013 by Jean-Luc Aufranc (CNXSoft) - 16 Comments

Cross Compiling Boost C++ Libraries for ARM

Boost provides free peer-reviewed portable C++ source libraries. Ten Boost libraries are already included in the C++ Standards Committee’s Library Technical Report and will be in the new C++11 Standard. The Boost C++ libraries are already included in popular Linux and Unix distributions such as Fedora, Debian, Ubuntu and NetBSD and are used by projects such as Python, Xibo, Civilization IV, etc.. Here are the steps to cross-compile Boost C++ libraries for arm using arm-linux-guneabi-g++: Download the source code:

wget http://sourceforge.net/projects/boost/files/boost/1.47.0/boost_1_47_0.tar.bz2/download

1	wget http://sourceforge.net/projects/boost/files/boost/1.47.0/boost_1_47_0.tar.bz2/download

Extract the source code:

mv download boost.tar.bz2
tar xjvf boost.tar.bz2
cd boost_1_47_0/

mv download boost.tar.bz2

tar xjvf boost.tar.bz2

cd boost_1_47_0/

Bootstrap the code:

./bootstrap.sh

1	./bootstrap.sh

Modify the configuration file (project-build.jam) to use the ARM toolchain by replacing the line with “using gcc” by:

using gcc : arm : arm-linux-gnueabi-g++ ;

1	using gcc : arm : arm-linux-gnueabi-g++ ;

Install the python development package:

sudo apt-get install python-dev

1	sudo apt-get install python-dev

Build and install the boost libraries:

./bjam install toolset=gcc-arm --prefix=~/edev/beagleboard/libs --disable-long-double -sNO_ZLIB=1 -sNO_BZIP2=1

1	./bjam install toolset=gcc-arm --prefix=~/edev/beagleboard/libs --disable-long-double -sNO_ZLIB=1 -sNO_BZIP2=1

This was tested in Ubuntu 11.04 (natty) and 10.04 LTS with linaro g++ toolchain. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his […]

October 1, 2011October 1, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Samsung Unveils New Dual-core Exynos 4212 Processor

Samsung unveiled its new Exynos processor this week at Samsung Mobile Solution Forum 2011 in Taipei, Taiwan. The Exynos 4212 is a dual core ARM Cortex A9 processor clocked up to 1.5 GHz and “will improve processing power by 25 per cent and enhance a device’s 3D abilities by a massive 50 per cent” according to Samsung. The processor will also consume 30 percent less power than its predecessor (Exynos 4210) thanks to Samsung new 32nm HKMG process. Finally the company said that the Exynos 4212 will incorporate a rich portfolio of advanced codec accelerators that support digital still images, video recording and play-back at 1080p full-HD resolution, an image signal processor and an on-chip HDMI 1.4 interface. Samsung’s Exynos 4212 processor will sample to select customers in Q4 2011. Samsung also announced a website dedicated to Exynos processors. This website has a lot of information on Exynos 3110 and […]