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November 9, 2011January 15, 2013 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Device Tree Status Report – ELCE 2011

Grant Likely, owner at Secret Lab Technology, describe the current status of device tree (used to resolve ARM “hodgepodge” issue) and provides an example at Embedded Linux Conference Europe 2011. Abstract: In recent years, Linux has enjoyed immense success in the embedded market, and we’ve seen an explosion in the number of devices supported by the mainline Linux kernel. Traditionally, however, adding support for another embedded machine typically involved adding yet another board.c file to the kernel which more often than not was simply cut and paste from a similar board. As a result, board support code contains a huge amount of duplication and has become so huge that it is becoming unmaintainable. To move away from individual board files, several architectures have adopted the Device Tree method of encoding the hardware details into a data structure which can be parsed by generic initialization code and device drivers. This session […]

November 8, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Developing Embedded Linux Devices Using the Yocto Project – ELCE 2011

Presentation entitled “Developing Embedded Linux Devices Using the Yocto Project and What’s new in 1.1” by David Stewart, Intel, at Embedded Linux Conference Europe 2011. Abstract: The Yocto Project is a joint project to unify the world’s efforts around embedded Linux and to make Linux the best choice for embedded designs. The Yocto Project is an open source starting point for embedded Linux development which contains tools, templates, methods and actual working code to get started with an embedded device project. In addition, the Yocto Project includes Eclipse plug-ins to assist the developer. This talk gives a walk-through of the key parts of the Yocto Project for developing embedded Linux projects. In addition, features are described from the latest release of Yocto (1.1). At the end of the talk, developers should be able to start their own embedded project using the Yocto Project and use it for developing the next […]

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 30, 2011October 30, 2011 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Run 2 OS Simultaneously on ARM (OMAP4) with Codezero Embedded Hypervisor

B Labs, a company specializing in ARM Virtualization, was at ARM Techcon 2011 showcasing Codezero, their Embedded Hypervisor to run multiple Linux OS such as Android and Chrome OS on ARM processors. The main purpose of running 2 operating systems is to separate home and enterprise operating systems in mobile devices so that enterprise data is safe. Charbax (ARMDevices.net) interviewed Bahadir Baldan, founder of B Labs, and showed a demo running 2 Android instances and another running Android and Linux in pandaboard. The overhead is 10 to 15% according to B Labs, so the performance hit is minimal. They have already managed to run 4 OS on quad core processors with good performance. They are not able to run Windows operating systems (e.g. Windows Mobile 7.5/ Windows 8) yet, because Cortex A9 processors lack virtualization extensions. This will however be feasible with Cortex A15 processors as binary virtualization will be available. […]

October 28, 2011October 29, 2011 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

ARM Unveils 64-Bit ARMv8 Architecture

ARM has just disclosed the technical of the ARMv8 architecture (to selected partners), featuring 64-bit instruction set support, extended virtual addressing, and backwards-compatible 32-bit support, so that software designed for ARMv7 (Cortex-A family) cores will run on the ARMv8 architecture. Here are the key points of the press release: The ARMv8 architecture consists of two main execution states, AArch64 and AArch32. The AArch64 execution state introduces a new instruction set, A64 for 64-bit processing. The AArch32 state supports the existing ARM instruction set. The key features of the current ARMv7 architecture, including TrustZone®, virtualization and NEON™ advanced SIMD, are maintained or extended in the ARMv8 architecture. … In support of the introduction of the ARMv8 architecture, ARM is working to ensure a robust design ecosystem to support the 64-bit instruction set. The ARM compiler and Fast Models with ARMv8 support have already been made available to key ecosystem partners. Initial […]

October 27, 2011October 27, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Texas Instruments OMAP 4 / OMAP 5 Update at ARM Techcon 2011

Katie Morgan interviews Brian Carlson, OMAP Product Line Manager – TI, at ARM Techcon 2011. They talk about current products using OMAP4 such as the Amazon Kindle Fire, Motorola Bionic, Motorola Razr and Toshiba AT200. Then they discuss about OMAP 5. Brian explains that OMAP 5 is an extension of OMAP 4 so that once you write software for OMAP 4 it will run on OMAP 5, so the transition is very easy. Products using OMAP 5 will start shipping end of 2012, beginning of 2013. They also talked about the new Cortex-A7 and big.LITTLE processing, but it seems there is no formal announcement from TI on the matter, right now. Finally, they showed two demos: an OMAP4 platform streaming 1080p video stream from Netflix and an augmented reality demo where you show a picture to the camera to start a video on the phone. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX […]

October 27, 2011October 27, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Avnet and ARM Launch The Embedded Software Store

Avnet and ARM have jointly announced the launch of the Embedded Software Store during ARM Techcon 2011. This is a store where you can purchase or sell operating systems, software stacks, middleware and tools for embedded software development. The different software component are also classified in different markets namely automotive, communication, consumer, industrial, medical and military. There are already quite a few well known vendors such as Adeneo Embedded, Micrium, ST Microelectronics. Keil and more. Before a purchase you’ll be able to view product details and contact the vendor for details. Once the purchase is done, you an download the products immeditaly. Some products such as STM32F40x Standard Peripheral & DSP Library can actually be downloaded free of charge. So in the future, more silicon vendors may want to add their BSP, SDK and development tools free of charge to the site. Open source embedded software may also be available […]