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November 30, 2012 by Jean-Luc Aufranc (CNXSoft) - No Comments

Linaro 12.11 Release with Linux Kernel 3.7 and Android 4.2

Linaro release 12.11 has just been announced, and includes Linux Kernel 3.7-rc2 and Android 4.2. The tracking version (stable release) uses Kernel 3.4.19. This release upgrade Android to version 4.2, adds support for Origen 4 Quad board, and you can now use perf profiling utility in Linaro Android. Initial GRUB support for ARM is now available, the Ubuntu Precise server image is back online and lots of updates have been done on the kernel, mainly for Android, device tree and big.LITTLE. Here are the highlights of the release: Android Platform Enablement Android upgraded from 4.1.2 to 4.2 to all the platforms Android builds are available for Origen 4412 board setup Improvements to click-through license infrastructure MP3 playback enabled for ARM Versatile Express and Samsung Origen (4210 and 4412) Fixed riff USB issue on newer laptops Testing/LAVA Re-enabled Android CTS testing Integrated the new Methanol browser test Upstreaming Perf patch was […]

November 29, 2012November 29, 2012 by Jean-Luc Aufranc (CNXSoft) - No Comments

SoC Power Measurement with ARM Energy Probes and Linux EAP Tools

Andy Green, TI Landing Team lead at Linaro, gave an interesting presentation entitled “How to measure SoC power” at Linaro Connect Europe 2012. This talk was specifically aimed at software engineers, so that they know how to properly measure power consumption, and take actions to optimize the software to decrease it. In the first part of the presentation, he gives an overview of electronics basics with definition of voltage, load, current and power, units used for power measurements (Clue: you need to use Watts), and how voltage, current and power can be measured with voltmeters and ammeters. When you want to measure power in a rail, you would usually insert a shun resistor, use a multimeter and derive the power from the resistance and the measured voltage (P=V2/R). He also gives details about regulator efficiency, choosing measurement sampling… There are 4 common measurements strategies: DC IN – Easiest way, gives the complete […]

November 28, 2012December 9, 2012 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

2012 Embedded Market Study – Software Development & Processors

I’ve just come across an Embedded System Study by UBM published in April 2012. The company surveyed over 1,700 professionals working on embedded systems who are mainly based in the US (56%), but also in Europe (21%) and Asia (12%). The report is 87 long, but I found some of the slides are particularly interesting in regards to programming languages, operating systems and software life cycle, as well as processor/micro-controller choices. Unsurprisingly C (65%), C++ (20%) and assembler (5%) are still the main languages used for embedded software development. In this report, we also learn that the average team is composed of 14.5 members including 5.6 software engineers, 5.6 hardware engineers and 3.3 firmware engineers. 2012 was the first year they included QA Engineers and system integrators both with 2.6 members on average working on projects lasting from less than 6 months to over 25 months. UBM survey also provides a […]

November 26, 2012November 26, 2012 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

Big.LITTLE Processing Implementations and Current Status

There was a big,LITTLE mini-summit during Linaro Connect Europe 2012, where an update was given on current big.LITTLE implementations and the results of measurement of power vs performance. Big.LITTLE Processing Implementations Overview As briefly mentioned in “Versatile Express TC2 (2xA15, 3xA7) Development Board at ARM Techcon 2012“, there are 2 big.LITTLE implementations: In-kernel switcher (IKS) This implementation is already available through Linaro and only required minimal changed to the kernel as it mainly an augmentation to DVFS (Dynamic Voltage and Frequency Scaling) except instead of only adjusting voltage and frequency depending on the load, it will also move the load to different cores. The main drawback is that this implementation only uses half the cores. For example, on a 2x Cortex A15 / 2x Cortex A7 system, it can only use 2 cores at the same time (either A15 or A7 cores), as the load is managed between one type […]

November 22, 2012November 22, 2012 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

AMLogic Releases U-Boot and Updated Linux Kernel Source Code

AMLogic released kernel 3.0.8 source code for AML8726-MX a few months ago, and yesterday they provided an updated tarballs with the kernel, and for the first time, AFAIK, released the source code for U-Boot. There are 4 new files apparently generated from the (internal) git repository in AMLogic: common-2012-11-20-git-b687495906.tar.gz (108M) – This is the same kernel 3.0.8 release has last time, but with updated code. m1-kernel-android-2012-11-20-git-5d0f6b8e93.tar.gz (103M) – This looks like an older kernel 2.6 for AML8726-M1 only. uboot-master-2012-11-20-git-9b50e9a295.tar.gz (16M) – U-Boot 2010.06 possibly to use with the older 2.6 kernel. Only for M1 & M3 platforms. uboot-next-2012-11-20-git-b0e532795a.tar.gz (40M) – U-Boot 2011.03 for use with M3 and M6 platforms. I’ve already explained how to build the kernel in the previous post, so I’ll focus on U-Boot this time. Ubuntu 12.04 arm-linux-gnueabi- toolchain fails to build U-Boot (uboot-next), so you’ll have to install Sourcery toolchain instead: wget http://openlinux.amlogic.com/download/linux/ARM/gnutools/arm-2010q1-188-arm-none-eabi-i686-pc-linux-gnu.tar.bz2 tar xjvf arm-2010q1-188-arm-none-eabi-i686-pc-linux-gnu.tar.bz2 […]

November 20, 2012November 20, 2012 by Jean-Luc Aufranc (CNXSoft) - No Comments

TQ Group TQMa6X Embedded Modules based on Freescale i.MX6 Processors

TQ Group has recently unveiled several TQMa6X embedded CPU modules that feature Freescale i.MX6 Solo, Dual and Quad processors, targeting screen, multi-touch, and multi-display applications as well as conventional controlling tasks. 3 modules are available: TQMa6S-AA – Single Cortex A9 / 1,2 GHz, 2 GB eMMC Flash, 512 MB DDR3, 64 kB EEPROM, -25°C…+85°C TQMa6D – Dual Cortex A9 / 1,2 GHz, 2 GB eMMC Flash, 512 MB DDR3, 64 kB EEPROM, -25°C…+85°C TQMa6Q – Quad Cortex A9 / 1,2 GHz, 2 GB eMMC Flash, 1 GB DDR3, 64 kB EEPROM, -25°C…+85°C TQMa6X modules share the following specifications: Processor – Freescale MCIMX6 Single/Dual/Quad Cortex A9 up to 1,2 GHz System Memory – Up to 2 GB DDR3 SDRAM Storage – Up to 64 GByte eMMC Flash, EEPROM: 0 / 64 kbit and up to 128 MB NOR-Flash. System interfaces: CAN – 2x FlexCAN ESAI (Enhanced Serial Audio Interface) Ethernet – 1x 10/100/1000 Mbit (IEEE […]

November 18, 2012June 12, 2013 by Jean-Luc Aufranc (CNXSoft) - 37 Comments

Freescale i.MX6 Resources: Development Boards, Documentation, Source Code and Tools

Reader “Mark” recently left a comment saying the NDA on Freescale i.MX6 resources was lifted and documentation and source code were now available for the platform. So it’s time for me to look into it, and provide an overview of Freescale i.MX6 features, list available development platforms, and have a closer look at the documentation, source code and tools for the platform. Freescale i.MX6 Processors In 2011, Freescale initially announced 3 processors in the i.MX6 series for consumer, industrial and automotive markets, but added 2 lite SoC in 2012, and there are now 5 members in the family: Freescale i.MX6SoloLite – Single Cortex A9 processor up to 1 GHz with 256KB L2 Cache, 32-bit DDR3 and LPDDR2 memory support, and 2D graphics accelerator (Vivante GC355 + GC320) Freescale i.MX6Solo – Single Cortex A9 core up to 1 GHz with 512KB L2 Cache, 32-bit DDR3 and LPDDR2 memory support, and 2D & […]

November 16, 2012November 17, 2012 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

$199 GIZMO EXPLORER KIT – Embedded Development Kit Based on AMD G-Series G-T40E APU

I’ve just stumbled upon a low cost and open source embedded development kit featuring AMD G-Series G-T40E dual core APU that comes with the following: The Gizmo Board – A compact (10×10 cm) development board for powered by an AMD G-Series APU. The Explorer Board – An expansion I/O board providing an alpha-numeric keypad, a micro-display, and a breadboard area for prototyping and customization. Sage SmartProbe JTAG Development Tool – The kit includes the SmartProbe hardware and 20 hours of trial time use. Ethernet & USB Cables – The USB cable lets you connect the SmartProbe to your PC. The Ethernet cable is for networking connectivity, which can be used to access the SmartProbe as well. USB wall charger Power Supplyand Cable – A universal power supply for the Gizmo board, with a U.S.-standard cord. 6x standoffs with nuts Alpha-numeric keypad – To connect to the explorer board Installation DVD […]