Fedora Category - Page 5 of 10 - CNX Software

November 3, 2017November 3, 2017 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

Learn More About Linux’s New GPIO User Space Subsystem & Libgpiod

Sysfs was used to control GPIOs on Linux system with the GPIOs defined in /sys/class/gpio, but starting with Linux 4.8, a new GPIO interface for user space was introduced, with gpiochip becoming char devices foudn in /dev/gpiochip0, dev/gpiochip1, etc.. , and sysfs allegedly become deprecated. But a quick check in NanoPi Duo with Linux 4.11 shows both GPIO user space interfaces appear to be enabled:

ls /sys/class/gpio/
export gpiochip0 gpiochip352 unexport
ls /dev/gpiochip
gpiochip0 gpiochip1

ls /sys/class/gpio/

export gpiochip0 gpiochip352 unexport

ls /dev/gpiochip

gpiochip0 gpiochip1

Nevertheless overtime, sysfs will die out, and the new subsystem will likely be used by all systems, so it might be useful to learn more about it. One way to do that is to watch Bartosz Golaszewski’s ELCE 2017 talk entitled “New GPIO Interface for User Space” with the video embedded below. But I first I’ll summarize some of the key points. Now GPIO handling from user space becomes similar to other char driver with ioctl, poll and read functions, and beside assigning numbers […]

September 6, 2017 by Jean-Luc Aufranc (CNXSoft) - No Comments

Flick HAT is a 3D Tracking & Gesture Expansion Board for Raspberry Pi Boards

Way back in 2012, I wrote about Microchip MGC3130 3D Gesture Controller with “GestIC technology” which allows you to make gesture up to 15cm from the surface and at lower power in order to control devices in a new way. At the time, the chip was said to sell for $2.26 in large quantities, and the evaluation kits went for $169 and up. I’m writing about MGC3130 about 5 years later, as Seeed Studio has started taking pre-orders for a $25.89 Flick HAT board based on the solution, and designed for Raspberry Pi boards, or other boards with a compatible 40-pin “GPIO” header featuring an I2C interface. Flick HAT 3D Tracking & Gesture HAT specifications & features: Chip – Microchip MGC3130 3D Tracking and Gesture Controller Tracking / Gesture Features 3D tracking Gesture sensing up to 15cm: Swipe (east to west, west to east, north to south, south to north), […]

August 15, 2017August 15, 2017 by Jean-Luc Aufranc (CNXSoft) - 27 Comments

GIGABYTE MA10-ST0 Server Motherboard is Powered by Intel Atom C3958 “Denverton” 16-Core SoC

Last year, we wrote about Intel Atom C3000 series processor for micro-servers with the post also including some details about MA10-ST0 motherboard. GIGABYTE has finally launched the mini-ITX board with an unannounced Atom C3958 16-core Denverton processor. GIGABYTE MA10-ST0 server board specifications: Processor – Intel Atom C3958 16-core processor @ up to 2.0GHz with 16MB L2 cache (31W TDP) System Memory – 4x DDR4 slots for dual channels memory @ 1866/2133/2400 MHz with up to 128GB ECC R-DIMM, up to 64GB for ECC/non-ECC UDIMM Storage 32GB eMMC flash 4x Mini-SAS up to 16 x SATA 6Gb/s ports 2x Mini-SAS ports are shared with PCIe x8 slot Connectivity 2x 10Gb/s SFP+ LAN ports 2x 1Gb/s LAN ports (Intel I210-AT) 1x 10/100/1000 management LAN Video – VGA port up to 1920×1200@60Hz 32bpp; Aspeed AST2400 chipset with 2D Video Graphic Adapter with PCIe bus interface USB – 2x USB 2.0 ports Expansion Slots […]

August 14, 2017August 14, 2017 by Jean-Luc Aufranc (CNXSoft) - 33 Comments

Fedora 26 Supports Single “Unified” OS Images for Multiple ARM Platforms

The decision to use device tree in Linux occurred several years ago, after Linus Torvalds complained that Linux on ARM was a mess, with the ultimate goal of providing a unified ARM kernel for all hardware. Most machine specific board files in arch/arm/mach-xxx/ are now gone from the Linux kernel, being replaced by device tree files, and in many case you simply need to replace the DTB (Device Tree Binary) file from an operating system to run on different hardware platforms. However, this is not always that easy as U-boot still often differ between boards / devices, so it’s quite frequent to distribute different firmware / OS images per board. Fedora has taken another approach, as the developers are instead distributing a single Fedora 26 OS ARMv7 image, together with an installation script. Images for 64-bit ARM (Aarch64) are a little different since they are designed for SBSA compliant servers, so […]

July 5, 2017July 5, 2017 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Supermicro A2SDi-2C-HLN4F Server Mini-ITX Motherboard is Based on Intel Atom C3338 “Denverton” Processor

Almost exactly one year ago, I wrote about Intel Atom C3000 Series “Denverton” processor based on the same Goldmont architecture used in Apollo Lake processor, and used in an early GIGABYTE MA10-ST0 server motherboard prototype. The latter is not out yet, but according to a YouTube video, the 16-core motherboard should be launched in H2 2017. In the meantime, Supermicro also made their own Denverton motherboard based on a lower-end Atom C3338 dual core processor. Supermicro A2SDi-2C-HLN4F board specifications: Processor – Intel Atom C3338 dual core Denverton processor @ 1.50 / 2.20 GHz with 4 MB cache; 9W TDP System Memory Up to 64GB Register DIMM RDIMM and DDR4-1866MHz Up to 32GB Unbuffered ECC/non-ECC UDIMM, DDR4-1866MHz, in 2 DIMM slots Storage – 4x SATA 3 ports, but up to 8x SATA 3 (6 Gbps) ports are configurable; N.B.: total combined PCI-E lanes and SATA ports is up to 8 Connectivity […]

February 9, 2017March 23, 2018 by Jean-Luc Aufranc (CNXSoft) - No Comments

Samsung Introduces Artik 530 IoT Module & Development Kit with WiFi, BLE, and Zigbee/Thread

Samsung unveiled Artik 1, Artik 5, and Artik 10 IoT modules & development board families in 2015, but since then they dropped the Artik 1 family, and instead launched Artik 0, Artik 5, and Artik 7 modules and boards late last year. More recently the company canceled the more powerful Artik 1020 development board, but the Artik project is still going on, as they’ve just added Artik 530 module & development kit to their Artik 5 family. Samsung ARTIK 530 module specifications: SoC – Unnamed Quad core ARM Cortex A9 processor @ 1.2 GHz with a 3D graphics accelerator System Memory – 512 MB DDR3 Storage – 4GB eMMC v4.5 flash Connectivity – Dual band SISO 802.11 a/b/g/n WiFi, Bluetooth 4.2 LE + Classic, 802.15.4/Zigbee/Thread, 10/100/1000M MAC (external PHY required) Other Interfaces and peripherals Camera – 4-lane MIPI CSI up to 5MP (1920×1080 @ 30fps) Display – 4-lane MIPI DSI […]

October 27, 2016March 23, 2018 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

Samsung Introduces $5 ARTIK 0 and $50 ARTIK 7 Smart IoT Module Families

Samsung unveiled ARTIK 1, 3 and 5 boards for the Internet of Things in 2015, and started to sell them, together with development with WiFi, BLE and Zigbee connectivity earlier this year. The Korean company has now announced two new family with ARTIK 0 modules powered by an ARM Cortex-M MCU and destined to be used in HVAC, lighting, industrial sensors, personal health monitoring and more, as well as ARTIK 7 family powered by an Octa-core Cortex A53 processor, and targeting IoT gateways. ARTIK 0 Family ARTIK 0 family is now comprised for ARTIK 020 with Bluetooth, and ARTIK 030 for applications requiring Thread and/or Zigbee. Beside the different radios, both modules share the same key features: MCU – ARM Cortex-M4 up to 40 MHz with Floating Point Unit, 256KB flash, 32 KB SRAM, advanced hardware cryptographic engine with support for AES-128/-256, ECC, SHA-1, SHA-256, and a Random Number Generator […]

July 26, 2016 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

96Boards Gets a TV Platform Edition Targeting $50 Mid-range Boards, $99 High-end Boards

96Boards was born as a hardware and software standard with Consumer (CE) & Enterprise Editions (EE), with different form factors with the latter focusing on server boards, but with similar software requirements requiring recent and mostly open source software. The consumer edition was also split into “Standard” and “Extended” editions, which the latter allowing for larger boards with more features, while the Enterprise Edition has its own larger format, as well as an option for micro-ATX form factor. I’ve just learned that a “fifth” 96Boards standard has been worked on with 96Board TV Platform for Home Gateways, OTT Streaming boxes, and TV boards with prices target of $50 or lower for mid-range boards, and $99 or lower for high-end boards. 96Boards TV Platform hardware requirements: Dimensions – 160 x 120 mm (EE Standard form factor) RAM – 1GB minimum; 2GB recommended Flash – 8GB eMMC minimum WiFi – 802.11 g/n […]