CNX Software - Embedded Systems News

December 16, 2016December 16, 2016 by Jean-Luc Aufranc (CNXSoft) - 30 Comments

Compress & Decompress Files Faster with lbzip2 multi-threaded version of bzip2

Bzip2 is still one of the most commonly used compression tools in Linux, but it only works with a single thread, and I’ve been made aware that lbzip2 allows multi-threaded bzip2 compressions which should lead to much better performance on multi-core systems. lbzip2 was not installed by default in my Ubuntu 16.04 machine, but it’s easy enough to install:

sudo apt install lbzip2

1	sudo apt install lbzip2

I have cloned mainline linux repository on my machine, so let’s see how long it takes to compress the directory with bzip2 (one core compression):

time tar cjf linux.tar.bz2 linux

real    9m22.131s
user    7m42.712s
sys    0m19.280s

time tar cjf linux.tar.bz2 linux

real 9m22.131s

user 7m42.712s

sys 0m19.280s

9 minutes and 22 seconds. Now let’s repeat the test with lbzip2 using all 8 cores from my AMD FX8350 processor:

time tar cf linux2.tar.bz2 linux --use-compress-program=lbzip2

real    2m32.660s
user    7m4.072s
sys    0m17.824s

time tar cf linux2.tar.bz2 linux --use-compress-program=lbzip2

real 2m32.660s

user 7m4.072s

sys 0m17.824s

2 minutes 32 seconds. Almost 4x times, not bad at all. It’s not 8 times faster because you have to take into account I/Os, and at the beginning the system is scanning the drive, using all 8-core but not all full throttle. […]

December 15, 2016December 15, 2016 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Quectel SC20 Smart LTE Modules with WiFi, BLE and GPS Run Android 5.1

Google may just have released Android Things operating systems for IoT applications, but its big brother – Android – has already gotten into some other IoT systems such as Quectel SC20 module powered by a Qualcomm processor and supporting LTE, WiFi, Bluetooth LE, and GNSS functions. Quectel SC20 comes in different flavors to cater for various markets, but all module share most of the same specifications: SoC – Unnamed Qualcomm processor System Memory – TBD Storage – 8GB flash Cellular Connectivity – FDD LTE, TDD LTE, TD-SCDMA, EVDO/DCMA, WCDMA, and GSM; antenna: MIMO 2×2, supports Rx-diversity Other Wireless Connectivity WiFi – 2.4GHz 802.11b/g/n (SC20-CE/-W); Dual band 802.11a/b/g/n/ac (SC20-E/-A/-AU/-J) Bluetooth 2.1+EDR/3.0/4.1 LE GNSS – GPS, GLONASS, and BeiDou Interfaces LCD – 4x lanes MIPI-DSI, 1.5Gbps each, HD (720p) @ 60fps Camera – MIPI-CSI, up to 1.5Gbps per lane, supports two cameras 2-lane MIPI_CSI for rear camera, up to 8MP 1-lane MIPI_CSI […]

ArmSoM CM5 - Raspberry Pi CM4 alternative with Rockchip RK3576 SoC

December 15, 2016December 15, 2016 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

ReflowR is a $99 SMT Reflowing Tool for Makers and Students

You can solder SMT components to your custom board by hand, but it would be much faster if you could get a reflow tool instead to “bake” your board after placing the components. ReflowR SMT reflowing tool offers just that in a small and affordable form factor. Some people have tried to use DIY solutions to bake their board, but results may vary. ReflowR has been specifically designed to heat PCB offering constant results. It supports reflow, rework, MSD bake, or rework pre-bake, and follows JEDEC reflow profiles. You can also add a WiFi extension to monitor the tool from your smartphone and set the temperature profile. Two version are available: Smart ReflowR – Compact 600W system for for makers and learners. Large ReflowR – Larger 1200W system for professionals “STEM Inspiration kits” are also offered without a ReflowR kit, but with multiple components, solder paste, a few PCBs, tweezers, […]

December 15, 2016December 17, 2016 by Karl Johnson - 16 Comments

YokaTV KB2 Review – Amlogic S912 TV Box with 32 GB Flash

CNXSoft: This is another review by Karl about Amlogic S912 based YokaTV KB2 TV box. Introduction Today we will be looking at Videostrong YokaTV KB2. Below are the specs from Videostrong website. This is my first S912 device so I had high expectation. I have been using it for quite some time now with no major issues. I received approximately 6 OTA updates since I started testing and some welcome updates have come. Build When I receive a box first thing I do is take it apart and check out the inside. I was excited when I found out it had 32 gig of storage. It is not too common. Then when I opened the box I was really happy to see an antenna that wasn’t soldered on. Makes it easy to add a different one. +1 for KB2. Then I noticed the heat sink. It seemed a little small. […]

December 14, 2016 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Arduino MKRZero is a Smaller Arduino Zero Board

Arduino Zero was unveiled over two years ago with an Atmel SAMD21G18 ARM Cortex M0+ MCU in Arduino Uno Rev.3 form factor, the company has now launched Arduino MKRZero with the same MCU but using the much smaller Arduino MKR1000 form factor. Arduino MKRZero specifications: MCU – Atmel/Microchip SAMD21 32-bit ARM Cortex M0+ MCU @ 48 MHz with 32 KB SRAM, 256 KB flash (8KB for bootloader) External Storage – micro SD slot Digital I/O Pins – 22x GPIOs with 12x PWM, UART, SPI, and I2C, 8x external interrupts Analog Pins – 7x analog inputs (8/10/12-bit ADC), and 1x analog output (10-bit DAC) DC Current per I/O Pin – 7 mA USB – 1x micro USB port for power and programming Debugging – USB via Atmel’s Embedded Debugger (EDBG) on-board debugger, and JTAG Misc – reset button, 1x LED (pin 32), 32.768 kHz RTC Power 5V via micro USB port […]

December 14, 2016December 14, 2016 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Avantek H270-T70 384-core ARM Server Powered by Cavium ThunderX SoCs Can Be Bought Online

ARM servers have been around for a while, but usually it’s pretty hard to buy for individuals, and developer’s boards such as LeMaker Cello are never in stock, probably because the project has been canceled or suffered from further delays. However, if you have some uses for ARM servers and the cash that goes with it, Avantek Computer (UK) is selling some ARM based servers starting from an 1U Rack with a quad core Annapurna Alpine AL5140 processor up to Avantek H270-T70 with a 2U rack equipped with multiple Cavium ThunderX SoCs providing 384 ARMv8 cores to play with. Avantek H270-T70 server key features and specifications: SoCs – 8x Cavium ThunderX CN8890 processors with 48 custom ARMv8 cores each System Memory – 64x DDR4 ECC slots for up to 8TB memory Storage – 16x 2.5” hot-swappable HDD/SSD bays Connectivity – 8x 40GbE QSFP+ fiber ports (Cortina CS4343 controllers) Power Supply – […]

Rockchip RK3568/RK3588 and Intel x86 SBCs

December 14, 2016December 16, 2016 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Android Things OS for the Internet of Things Supports Raspberry Pi 3, Intel Edison, and NXP Pico Boards

Google introduced Project Brillo a little over a year ago, an operating system based on Android, but with a smaller footprint optimized for Internet of Things applications. Brillo has now just become Android Things OS, with Google releasing a developer preview of Android Things working on Raspberry Pi 3, Intel Edison, and NXP Pico boards. The company has also updated the Weave platform to simplify connection of all types of devices to the cloud, and interaction with services like the Google Assistant. The Weave Device SDK currently supports schemas for light bulbs, smart plugs, switches, and thermostats, with more type of device supported in the future, as well as a mobile app API for both Android and iOS. Using an Android based OS instead of a pure Linux OS should make it easier for Android app developers to create smart devices thanks to the use of familiar Android APIs and […]

December 13, 2016May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 14 Comments

Banana Pi BPI-M64 & BPI-M2 Ultra Boards PDF Schematics Published

SinoVoip has recently released PDF schematics for both of their Banana Pi boards, namely BPI-M64 board powered by Allwinner A64 processor, and BPI-M2 Ultra board based on the latest Allwinner R40 SoC with an on-chip SATA interface. For most boards on the market, this should not be news, but SinoVoip does not always release schematics in a timely manner, so you may want to be noticed when it happens: BPI-M64 schematics – https://bananapi.gitbooks.io/bpi-m64/content/en/bpi-m64schematicdiagram.html BPI-M2 Ultra schematics – https://bananapi.gitbooks.io/bpi-m2-ultra-open-source-single-board-computer/content/bpi-m2ultraschematicdiagram.html The clear benefit of BPI-M2 Ultra is the presence of a SATA connector NOT implemented via a slow USB 2.0 to SATA bridge, but instead directly through the SATA interface of the R40 quad core processor. As for BPI-M64 ($46), it can be compared to Pine64+ with 2GB RAM and a WiFi module ($39), and despite the higher price it does come with some benefits like adb over OTG working, it is […]