Testing Category - Page 143 of 168 - CNX Software

May 12, 2014May 12, 2014 by Jean-Luc Aufranc (CNXSoft) - 57 Comments

How to Extract a Device Tree File from Android Firmware Files

Up to now, all our cheap Android devices were based on older Linux kernel (3.0.x, 3.4.x) that still used board files (arch/arm/board, but we’ve recently seen companies like Amlogic and Rockchip release source code with Linux kernel 3.10.x. One of the key differences between these version are the move from board files to flattened device tree and multi-platform support. If it is fully implemented, a single kernel image should be able to boot multiple hardware platforms, and all low level configuration handled by the device tree file. Since I’ve connected the serial port of Tronsmart Vega S89 for debugging, and it’s a slow news day, I thought I might try to boot the Linux kernel I compiled myself, but one of the challenge was to get the device tree file. I’ll show how to extract it from the firmware. It should also be possible to get it directly from the […]

May 8, 2014May 11, 2014 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Imperas Releases ARM Cortex A53 & A57 Open Source Models for OVPsim

Since the end of 2012, it has been possible to use ARM 64-bit Fast models to run code compiled for the new ARMv8 architecture by emulating a 64-bit ARM processor inside an Intel / AMD processor. ARM fast models are not the only “free” option anymore, as Imperas has released OVPsim 20140430 with open source models for ARM Cortex A53 and Cortex A57 cores. OVPsim is a virtual platform that’s available free of charge for personal usage. The simulator itself (OVPsim) is closed source, but processor, peripheral and platform models are released under the Apache License version 2.0. OVP models of the ARM Cortex-A53 and Cortex-A57 are fully instruction accurate models, and you can use them for personal with an additional free license key, but if you want to make use of advanced features such as TrustZone and hardware virtualization you’ll need to purchase a commercial version (Imperas Developer or […]

May 5, 2014May 5, 2014 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

A Quick Test Drive of Tails, a Privacy Focused Linux Distribution

Tails (The Amnesic Incognito Live System) is a Linux distribution that allows you to use the Internet anonymously and circumvent censorship via the Tor network. It leaves no trace, and is said to use “state-of-the-art” cryptographic tools to encrypt files, emails and instant messages. It’s distributed as a live image that boots from a DVD drive, a USB stick, or an SD card. Tails v1.0 has recently been released. so let’s give it a quick try. Tails is currently only available for x86 (32-bit), no ARM image yet. The source code is available via a git repo. Let’s download the ISO image (mirror), and signature. Alternatively you can download both via BitTorrent. To make sure the image is not compromised it’s recommend to verify the integrity of the ISO image with the signature we’ve just downloaded. You’ll also need a signing key The are several methods, but I’ve opened a terminal, […]

May 3, 2014May 3, 2014 by Jean-Luc Aufranc (CNXSoft) - 9 Comments

Nvidia Tegra K1 CPU/FPU Performance is Comparable to Intel Celeron “Bay Trail-D” J1900 SoC

Nvidia Jetson TK1 development board powered by Nvidia Tegra K1 quad core ARM Cortex A15 processor and a 192-core Kepler GPU has started shipping, and some people have already received theirs, including Michael Larabel (Phoronix) who ran some benchmarks on the board that comes pre-loaded with Ubuntu 14.04 LTS. We already had some benchmarks comparing Tegra K1 to ARM peers on Android, but it’s the first time Linux benchmarks are available. The benchmarks seems to only involve CPU and FPU, and probably not the GPU at this point, but the results are still interesting, and Michael also pointed links comparing Nvidia Tegra K1 development board performance to some Intel Core i5 based PCs, as well as a platform based on an Intel Celeron J1900, a quad core processor part of Bay Trail Desktop family. The later is most interesting as we compare systems with similar power requirements. Nvidia Tegra K1 […]

April 25, 2014 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

How to Root Mele X1000 (Telechips TCC8935)

Yesterday, I’ve explained to how update firmware on Telechips TCC8935 Android TV boxes, Mele X1000 more exactly. Today I’ll show how to root the device. The method uses Vroot, a Windows-only tool, that appears to be popular recently, as it is the same tool that’s used to root Amlogic S802 based devices. Let’s get started in a Windows PC or virtual machine: Download and install Vroot Start Mele X1000, and go to Settings->Android Settings, then in Developer options, enable USB debugging Connect a micro USB to USB cable between Mele X1000 and your Windows PC Start Vroot,. It should detect your device, download and install drivers and a daemion. Check root access in your device, and a Windows in your default language may pop up in Mele X1000. Accept. You should now see “Mele X1000 is connected. No root permissions” in Vroot, click on the green Root button to start […]

April 23, 2014April 23, 2014 by Jean-Luc Aufranc (CNXSoft) - 13 Comments

Linux Kernel Source Code and Chromium OS Overlay for Rockchip RK3288

A few days ago, we’ve seen Chromium OS running on Rockchip RK3288 development platform. I’ve been informed the source code could have already been released via the newly registered rkchrome github account with Linux kernel 3.10.30 and the overlay files to build Chromium OS for RK3288. There’s also a u-boot repository but it is currently empty. This Linux kernel can also boot Rockchip RK3188 based Radxa Rock development board, but more tests are needed to see if it’s really usable. I’ll have a look at the Linux kernel, and try to build it, and leave the Chromium OS part for later or other people. Let’s retrieve the source code:

git clone https://github.com/rkchrome/kernel.git
cd kernel

1 2	git clone https://github.com/rkchrome/kernel.git cd kernel

We’ve got two kernel config files related to Rockchip in arch/arm/config:

ls arch/arm/configs/ | grep rock
rockchip_chromium_defconfig
rockchip_defconfig

ls arch/arm/configs/ | grep rock

rockchip_chromium_defconfig

rockchip_defconfig

But since this is a recent 3.10 kernel with support for Flattened Device Tree support, and multi-platform support, there’s not much to be seen in these files, and […]

April 19, 2014May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Embedded Linux Conference 2014 Schedule

The Tenth Embedded Linux Conference (ELC 2014) will take place on April 29 – May 1, 2014 at the San Jose Marriott in San Jose, California. The event will feature 90+ sessions on embedded Linux, Android and IoT with over 450 attendees expected to attend. It will also be co-located with Android Builders Summit and the AllSeen Alliance Hackfest. Even if you can’t attend it’s still interesting to see what will be discussed at the event to get a grasp of on-going developments, learn a few things about different optimization techniques, and so on. So I’ve gone through the sessions’ description, and I’ve designed my own virtual schedule with sessions that could be of interest. April 29 9:00 – 9:30 – Keynote: The Paradox of embedded and Open Source by Tim Bird, Sony Mobile Linux has taken the embedded world by storm. Billions (with a ‘B’) of devices have now shipped […]

April 17, 2014August 17, 2014 by Jean-Luc Aufranc (CNXSoft) - 242 Comments

Review of M8 Android Kitkat TV Box Powered by Amlogic S802 SoC

A few days ago, I wrote an Unboxing and Specs post about the M8, an Android TV Box powered by Amlogic S802 quad core Cortex A9 processor. The review took a little as I was waiting for a new firmware. I’ve now upgraded this S802 Box, and been able to complete a review. As usual , I’ll start by giving my first impressions, have a look at the user interface and settings, test different king of video files, evaluate Wi-Fi performance, and try to cover most hardware features including Bluetooth, external storage, USB webcam, and so on. The overall user’s experience, is very similar to Tronsmart Vega S89, but there are some notable differences I’ll go through during the review. First Boot, Settings and First Impressions Shenzhen Tomato sent me a sample unit which they call TM8 (Tomato M8?), but I’ll just refer to the device as M8 in the […]