Linux Category - Page 418 of 555 - CNX Software

August 28, 2014August 29, 2014 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Samsung Exynos 7 ARM Cortex A57 Processor Linux Code Submitted

Samsung has not announced any 64-bit processor yet, but according to a recent patchset Exynos 7 may be their first 64-bit ARM SoC, and it will be based on the faster Cortex A57 cores. A quick way to learn a little more is to check the device tree file (exynos7.dtsi). Here’s an interesting snippet:

+	cpus {
+		#address-cells = ;
+		#size-cells = ;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a57", "arm,armv8";
+			reg = ;
+		};
+	};

+ cpus {

+ #address-cells = ;

+ #size-cells = ;

+ cpu@0 {

+ device_type = "cpu";

+ compatible = "arm,cortex-a57", "arm,armv8";

+ reg = ;

+ };

As it stands, Exynos7 would be a single core Cortex A57 processor. This sounds unlikely that a company would launch a single core processor at this stage, so it’s probably early code that may not support all cores just yet. We also know Samsung uses ESPRESSO board for development with Samsung Exynos 7 processor and 3 GB RAM. Thanks to David for the tips. 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 […]

August 26, 2014May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 18 Comments

AllWinner A80 Linux SDK Released

After Android 4.4 SDK for AllWinner A31 last week, another AllWinner software development kit has been seen in the wild, this time for the new AllWinner A80 octa-core processor. A80 SDK includes source code for the Linux Kernel and U-boot, as well as buildroot, and various AllWinner tools. I’ve also noticed AllWinner A80 datasheet is available, but with the strict minimum information (45 pages). Let’s get the code, and extract it:

wget http://dl.linux-sunxi.org/SDK/A80/A80_SDK_20140728.tar.gz
tar xvf A80_SDK_20140728.tar.gz
cd A80_SDK_20140728

wget http://dl.linux-sunxi.org/SDK/A80/A80_SDK_20140728.tar.gz

tar xvf A80_SDK_20140728.tar.gz

cd A80_SDK_20140728

Now we need to configure the build:

./build.sh config

Welcome to mkscript setup progress
All available chips:
   0. sun9iw1p1
Choice: 0
All available platforms:
   0. android
   1. dragonboard
   2. linux
Choice: 2
All available kernel:
   0. linux-3.4
Choice: 0
All available boards:
   0. optimus
   1. p1
   2. perf
   3. perf5
   4. perf-lpddr3
Choice: 0

./build.sh config

Welcome to mkscript setup progress

All available chips:

0. sun9iw1p1

Choice: 0

All available platforms:

0. android

1. dragonboard

2. linux

Choice: 2

All available kernel:

0. linux-3.4

Choice: 0

All available boards:

0. optimus

1. p1

2. perf

3. perf5

4. perf-lpddr3

Choice: 0

sun9i is the codename for AllWinner A80, not sure what w1p1 means. Dragonboard must be the internal Allwinner development board, but I just selected Linux, since the SDK does not come with Android, and finally I opted for optimus, which could stand for OptimusBoard. You may need to install extra dependencies in your build machine, for example (in Ubuntu 14.04):

sudo apt-get install flex texinfo build-essential

1	sudo apt-get install flex texinfo build-essential

Now let’s start buildroot which should retrieve the toolchain, […]

August 25, 2014November 23, 2014 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

RPiSoC Development Board Based on Cypress PSoC 5LP Features Pmod, Raspberry Pi, and Arduino Headers (Crowdfunding)

Embedit Electronics, a startup founded by two recent graduates of Rensselaer Polytechnic Institute, USA, has designed a board powered by Cypress Semiconductor PSoC 5LP ARM Cortex M3 system-on-chip with programmable digital and analog I/Os. The board can interface with all Raspberry Pi models, Digilent Pmod peripheral modules, and supports Arduino shields. RPiSoC specifications: SoC – Cypress PSoC 5 with ARM Cortex M3 core at 67MHz , 256 KB Flash Program Memory, with user configurable write protection, and 64KB SRAM Expansions and I/Os: Arduino shield and ICSP compatible headers. 2x Digilent Pmod compatible headers 58 reconfigurable GPIO pins 26-pin ribbon cable connector for use with the Raspberry Pi 8 SIO (Special Input/Output) pins with higher current sink 5-pin MiniProg3 header for programming via MiniProg3 hardware. USB – 1x micro USB port for power, communication and programming. Misc – Reset push button, User accessible LED, Programming switch Power – 5V via micro […]

August 25, 2014 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

$25 GL.iNet 6416A is an Hackable OpenWRT Router with Easy UART and GPIO Access

There are plenty of low cost routers supporting OpenWRT, but GL.iNet 6416A has several advantages compared to devices like TP-Link WR703N. Both are based on Atheros AR9931, but GL.iNet router has more memory and storage (64MB RAM + 16MB Flash vs 32MB RAM + 4MB Flash), two Ethernet ports instead of just one, and 6 GPIOs, the serial pins, and power signals (5V, 3.3V and GND) are all easily accessible via though holes or headers. Gl.iNet 6416A can be purchased for about $25 on DealExtreme or Amazon US, and it used to be listed on eBay, but is now out of stock. Gl/iNET 6416A specifications: Wi-Fi SoC – Atheros AR9331 MIPS processor @ 400 MHz System Memory – 64MB RAM Storage – 16MB Flash Connectivity – 2x 10/100 Mbit Ethernet ports, 802.11 b/g/n Wi-FI up to 150Mbps USB – 1x USB 2.0 port, 1x micro USB port for power Debugging […]

August 24, 2014June 22, 2016 by Jean-Luc Aufranc (CNXSoft) - 24 Comments

Linux (Enlightenment and Lubuntu) in WeTek Play Amlogic TV Box

Last week I reviewed WeTek Play, a TV box with two DVB-S2 tuners, powered by Amlogic AML8726-MX dual core ARM Cortex A9 processor, and running Android 4.2, but the company also released several Linux based images including one with Enlightenment window manager, and another, temporary one, with Ubuntu core which allows you to install Lubuntu or Xubuntu with apt-get. There are also working on OpenELEC, but have not released the binary yet. Today, I’ll try the Enlightenment image because it also supports hardware video decoding via Gplay (gstreamer), and show how to install Lubuntu. The instructions below have been done in a computer running Ubuntu 14.04, but a Windows computer can also be used. Download Wetek-Linux.img.bz2 Connect a micro SD card to your computer, extract and flash Wetek-Linux.img: In Linux using a terminal window:

bzip2 -d Wetek-LInux.img.bz2
sudo dd if=Wetek-Linux.img of=/dev/sdd bs=1M
sync

bzip2 -d Wetek-LInux.img.bz2

sudo dd if=Wetek-Linux.img of=/dev/sdd bs=1M

sync

In Windows, extract the image, and use Win32DiskImager to copy the image to your micro SD […]

August 21, 2014May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 14 Comments

Interview with Allwinner Regarding their Linaro Membership

Since Allwinner has joined the Linaro Digital Home Group earlier this year, many people, including myself, have wondered what it means in terms of Linux support, and the engagement with the open source community. Following up on an idea from a regular reader, I’ve decided to asked a few questions to Ben-El Baz, marketing manager at Allwinner, and Linaro contact for Allwinner, which he kindly answered, and accepted to be published on CNX Software. CNXSoft: Why did Allwinner decide to join Linaro, and especially the Digital Home Group? Allwinner: One of our company’s goals is to be a technology leader. It’s ambitious but not too far-fetched given the background of our leadership and engineering team. There’s an extremely talented group of guys behind the scenes here! Leading is difficult unless you’re involved in collaborative organizations like Linaro that work on new technology. Joining Linaro is an opportunity for us to […]

August 21, 2014May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Embedded Linux Conference Europe 2014 Schedule – IoT, ARM vs x86, Optimization, Power Management, Debugging…

The Embedded Linux Conference Europe (ELC 2014), CloudOpen, and LinuxCon Europe will jointly take place at the Congress Centre Düsseldorf, in Germany on October 13 – 15, 2014. The 3-day events will consists of keynotes, presentations, and tutorials. Each day will open with two or three keynotes by speakers including Jim Zemlin (Executive Director, Linux Foundation), and Jono Bacon (XPRIZE), followed by presentation and tutorials. There will be 45 presentations for ELCE, 58 for LinuxCon, and 47 for CloudOpen, I’ll make a virtual schedule with a few sessions part of the Embedded Linux Conference Europe “track”. Monday, October 13 11:15 – 12:05 – Performance Analysis Using the Perf Suite by Mans Rullgar, Consultant When faced with a performance problem, the initial steps towards a solution include identifying the sections of code responsible and the precise reasons they are time-consuming. To this end, the ‘perf’ profiling tools provide valuable insight into the […]

August 20, 2014August 20, 2014 by Jean-Luc Aufranc (CNXSoft) - 12 Comments

WRTNode is a Hacker-Friendly Open Source Hardware OpenWRT Wi-Fi Module Selling for $25

There are now some tiny and low cost ($15 to $20) Wi-Fi modules supporting OpenWRT such as VoCore and AsiaRF AWM002. However due to their small size they may not be that hacker’s friendly as they can’t have 2.54mm headers due to heir small size, and I’ve recently received AsiaRF AWM002 only to find out it not only needs 3.3V supply voltage, but also 1.8V and 1.2V. So I’d need to make my own power circuit with the required LDOs, or purchase a $20 base board to use the module. Here comes WRTnode another larger Wi-Fi module but with more usable 2.54mm headers, and based on the more powerful Mediatek MT7620N processor @ 600MHz. WRTnode hardware specifications: Processor – Mediatek MT7620N 600MHz MIPS CPU (MIPS24KEc) System Memory – 64MB DDR2 Storage – 16MB SPI flash Connectivity – Wi-Fi 2T2R 802.11n 2.4 GHz up to 300Mbps Expansion Headers – 2x with […]