Linux News - Page 266 of 482 - CNX Software

February 14, 2018February 16, 2018 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Human Readable Decoding of /proc/cpuinfo for Arm Processors

One of the most common way to get CPU information is to check the content of /proc/cpuinfo. For example, this is the output I get from running the command on NanoPi NEO (Allwinner H3) board:

cat /proc/cpuinfo 
Processor	: ARMv7 Processor rev 5 (v7l)
processor	: 0
BogoMIPS	: 2400.00

processor	: 1
BogoMIPS	: 2400.00

Features	: swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

Hardware	: sun8i
Revision	: 0000
Serial		: 5400503583203c3c040e

cat /proc/cpuinfo

Processor : ARMv7 Processor rev 5 (v7l)

processor : 0

BogoMIPS : 2400.00

processor : 1

BogoMIPS : 2400.00

Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt

CPU implementer : 0x41

CPU architecture: 7

CPU variant : 0x0

CPU part : 0xc07

CPU revision : 5

Hardware : sun8i

Revision : 0000

Serial : 5400503583203c3c040e

Many fields are self-explanatory, but what about CPU implementer and CPU part numbers? Those are values stored in Arm’s CPUID Base Register, and 0x41 looks up to Arm implementer, while 0xc07 refers to Cortex A7. But I had to look it up to find out. One solution would be to decode those values in the kernel, but the developers won’t do that probably because it may break user-space programs that rely on hexadecimal values. So instead, Riku Voipio decided to write and submit a patch for lscpu program found in util-linux package. The patch has been merged so the new ID mapping feature should be supported in util-linux 2.32 and greater. In the meantime, […]

February 13, 2018February 13, 2018 by Jean-Luc Aufranc (CNXSoft) - No Comments

Embedded Linux Conference & IoT Summit 2018 Schedule

The Embedded Linux Conference 2018 and the OpenIoT Summit 2018 will jointly take place next month, on March 12 – 14, 2018 in Portland, Oregon, USA. The former is a “vendor-neutral technical conference for companies and developers using Linux in embedded products”, while the latter is a “technical conference for the developers and architects working on industrial IoT”. The Linux Foundation has already published the schedule, and it’s always useful to learn what will be discussed about even for people who won’t attend. With that in mind, here’s my own virtual schedule with some of the talks I find interesting / relevant to this blog. Monday, March 12 10:50 – 11:40 – Progress in the Embedded GPU Ecosystem by Robert Foss, Collabora Ltd. Ten years ago no one would have expected the embedded GPU ecosystem in Linux to be what it is now. Today, a large number of GPUs have […]

February 12, 2018February 12, 2018 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Monitor Network Traffic per Process with Nethogs

Yesterday I wrote about using 3G on Raspberry Pi board, and one of the commenter mentioned higher traffic than expected when connecting to 3G to just send a few bytes before disconnecting. One of the reasons are the extra data needed if you transmit data over a secure connection, for example establishing a PPP connection, connect to the board over SSH, and disconnect, results in the transmission & reception of a few kilobytes on my board:

Connect time 1.9 minutes. 
Sent 5815 bytes, received 6972 bytes.

1 2	Connect time 1.9 minutes. Sent 5815 bytes, received 6972 bytes.

But if you get much more traffic than that, you may want to investigate if another package may transfer data when it detects the connection is up. To analyze traffic, tcpdump and Wireshark are good options, especially if you want to look into the packets data, however such tools do not tell you which process is sending or receiving the data. So I searched whether I could find a program that would do […]

February 11, 2018October 22, 2020 by Jean-Luc Aufranc (CNXSoft) - 13 Comments

How to Use 3G and GPS on Raspberry Pi with ThaiEasyElec 3G HAT Expansion Board

Venus Supply is an embedded systems company based in Bangkok, Thailand that sells products through their ThaiEasyElec website/brand, as well as a act as a local distributor for popular DIY electronics items. I previously tested their ESPino32 ESP32 board, and the company has now send me another of their new product called “3G HAT Expansion for Raspberry Pi” and based on Quectel UC20-G that support 3G and GPS/GLONASS connectivity globally, meaning it should work in any country with 2G or 3G coverage. After listing the specifications, going through unboxing and assembly with a Raspberry Pi 2/3 board, I’ll write some quick start guide to show what I had to do to use GPS and connect to 3G with a Hologram SIM card. 3G HAT Expansion for Raspberry Pi Specifications Quectel UC20-G wireless module supporting Cellular 3G – UMTS @ 800/850/900/1900/2100 MHz 2G – GSM @ 850/900/1800/1900 MHz Data – HSPA+ […]

February 10, 2018February 10, 2018 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Open Source Software Releases – VLC 3.0 and Android-x86 7.1-r1

Two completely unrelated open source projects have released a stable version of their software this week, but instead of writing a post for each I’ll write about them in a single post. VLC 3.0 Vetinari VLC developers have just released version 3.0 – codenamed Vetinari – of the popular media player with new features such as ChromeCast support, and 8K video playback. Other highlights from the release include: Hardware decoding enabled by default to get 4K and 8K playback 10-bit and HDR support (only on Windows 10 Fall Creators Update for now) 360 video and 3D audio, up to Ambisoncics 3rd order Allows audio passthrough for HD audio codecs Can play Blu-Ray Java menus: BD-J Browsing of local network drives and NAS VLC 3.0 is also the first major version to be released for all platforms at the same time, and you can download VLC 3.0 for Windows, Mac OS […]

February 8, 2018February 8, 2018 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

Kodi 18 Features and Improvements (FOSDEM 2018 Video)

Most Kodi users are now running Kodi 17.x Krypton that was initially released in February 2017, with the latest point version being Kodi 17.6. At the time of Krypton release, the developers had also started working on Kodi 18 “Leia” which should now be in “alpha”, and the stable release may only be a few months away although Kodi developers do not provide an ETA. What they did provide however – via Martijn Kaijser at FOSDEM 2018 – is a progress report for Kodi 18 “Leia”, as well as some insights into Kodi 19 whose development has just started. Kodi 18 has gone through a lot of cleanup with the code upgraded to C++11 standard, duplicate code and obsolete libraries removed, dropped unmaintained feature, and so on. They also moved non-core features such as audio encoders and decoders, PVR, picture decoding, etc… to external plugins. This work resulted into 299,476 […]

February 8, 2018 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

TECHBASE ModBerry M300 IoT Gateway Adds Support for NanoPi and Orange Pi Allwinner H5 Boards

Announced at the end of last year TECHBASE launched the ModBerry M300, a Linux IoT gateway powered by FriendlyELEC NanoPi NEO board equipped with Allwinner H3 Cortex A7 processor. The company has now made four extra variants of the gateway with Allwinner H5 quad core Cortex A53 based development boards from FriendlyELEC and Shenzhen Xunlong: Modberry M300 N2 – Based on NanoPi NEO2 Modberry M300 N2+ – Based on NanoPi NEO Plus2 adding 8GB eMMC flash, WiFi & Bluetooth 4.0, and an extra USB port over the N2 model Modberry M300 O1 – Based on Orange Pi Zero Plus Modberry M300 O2 – Based on Orange Pi Zero Plus2 adding 8GB eMMC flash, HDMI, one extra USB port, and Bluetooth 4.0 over the O1 model, but falling back to 10/100 Ethernet, while all three models above come with Gigabit Ethernet To avoid confusion, the original NanoPi NEO model has changed […]

February 7, 2018June 18, 2018 by Jean-Luc Aufranc (CNXSoft) - 13 Comments

PicoCORE MX7ULP is a Compact Module Based on NXP i.MX 7ULP Ultra Low Power Processor

NXP unveiled another variant of their i.MX 7 Cortex A7 processor last year, and I missed it. NXP i.MX 7ULP offers many of the same features as i.MX 7, but is manufactured using FD-SOI (Fully Depleted Silicon On Insulator) process technology to offer lower power consumption, as low as 15 mW or less in deep sleep, or 17 times less in comparison to i.MX 7 devices, while the dynamic power efficiency is improved by 50 percent on the real time domain (Cortex-M4). I found out about it thanks to an email from F&S Elektronik Systeme about the introduction of their PicoCORE MX7ULP module – based on i.MX 7ULP processor – at the Embedded World 2018 conference. PicoCORE MX7ULP CoM specifications: SoC – NXP i.MX 7ULP Arm Cortex-A7 processor @ up to 800 MHz, with Arm Cortex-M4 real-time core, and 2D/3D graphics accelerator System Memory – Up to 1GB LPDDR3 Storage […]