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Linux 5.19 Release – Main changes, Arm, RISC-V and MIPS architectures

Linus Torvalds has just announced the release of Linux 5.19. It should be the last 5.xx version, with Linux 6.0 coming for the next cycle: So here we are, one week late, and 5.19 is tagged and pushed out. The full shortlog (just from rc8, obviously not all of 5.19) is below, but I can happily report that there is nothing really interesting in there. A lot of random small stuff. In the diffstat, the loongarch updates stand out, as does another batch of the networking sysctl READ_ONCE() annotations to make some of the data race checker code happy. Other than that it’s really just a mixed bag of various odds and ends. On a personal note, the most interesting part here is that I did the release (and am writing this) on an arm64 laptop. It’s something I’ve been waiting for for a _loong_ time, and it’s finally reality, […]

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Libre Computer ROC-RK3328-CC now supports Ubuntu 22.04 with Linux 5.18.2

Libre Computer’s latest Ubuntu 22.04 desktop and server images for ROC-RK3328-CC board are based on Linux mainline, namely Linux 5.18.2, and other boards from the company, based on Allwinner H2+/H5 processor or Amlogic S905X, have gotten the same treatment. Some companies will churn out boards regularly but provide limited software support. Libre Computer seems to have taken a different approach, as they released most of their board in 2017 and 2018, starting with AML-S905X-CC “Le Potato” board based on the Amlogic S905X processor, followed by ALL-H3-CC “Tritium” SBC with Allwinner H2+, H3, or H5 processor, and finally ROC-RK3328-CC “Renegade” board, but still release updated OS images in 2022. I reviewed ROC-RK3328-CC SBC with Debian 9 and Ubuntu 18.04 using Linux 4.4 in July 2018, and four years later, you might have thought such boards could have become abandonware, but Libre Computer just released Ubuntu 22.04 Desktop and Server image with […]

Khadas Edge2 Arm mini PC
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Seeed Studio outs $5 XIAO ESP32C3 board with WiFi and BLE, battery support

Seeed Studio’s XIAO family of tiny MCU boards expands with the XIAO ESP32C3 board equipped with ESP32-C3 WiFi and Bluetooth LE (BLE) microcontroller, support for LiPo batteries, and following the same 21 x 17.5mm form factor. If I’m counting right, this is the fifth member following the original XIAO based on Microchip SAMD21G18 Cortex-M0+ MCU, XIAO RP2040, and the nRF52840-based XIAO BLE and XIAO BLE Sense boards which I tested with Edge Impulse. XIAO ESP32C3 specifications: Wireless MCU –  Espressif Systems ESP32-C3 single-core RISC-V microcontroller @ 160 MHz with 400KB SRAM, 384KB ROM, 4MB flash Wi-Fi 4 & Bluetooth LE 5.0 connectivity Antenna – External u.FL antenna USB – USB Type-C port for power and programming Expansion I/Os 2x 7-pin headers with 1x UART, 1x I2C, 1x SPI, 11x GPIO (PWM), 4x ADC, I2S 3.3V I/O voltage (not 5V tolerant) Debugging – JTAG pads Misc – Reset button, Boot button, […]

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LimeSDR Mini 2.0 USB SDR board gets an upgrade to Lattice Semi ECP5 FPGA (Crowdfunding)

The LimeSDR Mini is an open-source hardware full-duplex USB SDR board based on Intel Altera Max 10 Altera FGPA that was introduced in 2017 on Crowd Supply and raised close to $2 million US dollars. Since it has been used in various projects including digital TV transmitters. Lime Microsystems is now back on Crowd Supply with the similar-looking LimeSDR Mini 2.0 replacing the MAX 10 FPGA with 16K logic gates with a more powerful and capable Lattice Semiconductor ECP5 FPGA with 44K logic gates while keeping the company’s LMS7002 RF transceiver. LimeSDR Mini 2 specifications: FPGA –  Lattice Semi ECP5 (LFE5U-45F) with 44K logic gates, 108 sysMEM blocks (18kb), 1,944 Kb embedded memory, 351 Kb distributed RAM bits Storage –  4 MB flash memory for data; 2x128KB EEPROM for RF transceiver MCU firmware and data RF Lime Microsystems LMS7002M RF transceiver Tx & Rx SMA connectors Frequency range – 10 […]

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How to use a ToF laser ranging sensor with Arduino and Wisblock

Laser ranging has many applications in production and life, such as ranging, positioning, obstacle avoidance, and so on. Time-of-Flight (ToF) ranging, as a type of laser ranging technology, is often used for real-time object detection in robots, autonomous vehicles, and traffic management because of its accuracy, fast response, and low power consumption. The face detection function of mobile phones also uses this technology. This article will introduce the WisBlock RAK12014 ToF laser ranging sensor module, and use the WisBlock development board to demonstrate how the module works. What is a ToF laser ranging sensor module? A ToF laser ranging sensor module uses laser pulses to measure the distance between itself and a target object. The WisBlock RAK12014 ToF laser ranging sensor module is based on STMicro VL53L0X, the smallest ToF ranging sensor in the world. The WisBlock RAK12014 provides accurate distance measurement and can measure distances up to 2 meters. […]

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Rockchip RK3588 CPU module exposes more I/Os through four board-to-board connectors

We’ve already seen several Rockchip RK3588 modules with Firefly Core-3588J, Turing RK1, and Banana Pi RK3588_CV1, all with an edge connector to insertion into the carrier board. Rongpin RD-RK3588 system-on-module is a little different with four board-to-board connectors that enable a slightly more compact design, and should expose more I/Os than say a 314-pin MXM edge connector. The module ships with up to 16GB of RAM, 128 GB of storage, a Rockchip RK806-1 PMIC, and the company also offers a development kit with RD-RK3588-B baseboard fitted with the module for evaluation and early software development. RD-RK3588 board-to-board module RD-RK3588-C core module specifications: SoC – Rockchip RK3588 octa-core processor with 4x Arm Cortex-A76 cores @ up to 2.4 GHz, 4x Arm Cortex-A55 cores, Arm Mali-G610 MP4 GPU with support for OpenGL ES3.2, OpenCL 2.2, Vulkan1.1, 6 TOPS NPU, 48MP ISP, 8Kp60 video decoding, 8Kp30 video encoding System Memory – 4GB, 8GB, […]

Rockchip RK3568/RK3588 and Intel x86 SBCs
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DIY SBC cases and SBC Case Builder tool based on OpenSCAD

Since you can’t always rely on single board computer (SBC) vendors to provide a case to match your needs, some went the DIY route. Willy Tarreau designed some laser-cut enclosures with Inkscape for various SBCs, while hominoids went a step further by developing the “SBC Case Builder” tool to automatically generate various types of 3D printable enclosures using OpenSCAD. Willy designed five similar enclosures for Khadas VIM3/VIM3L, FriendlyELEC NanoPi Fire3, SolidRun Clearfog Base networking SBC, Libre Computer AML-S805X-AC (aka “La Frite”), and AAEON UP Board. All cases are available in Inkscape SVG format, and Willy accepts contributions for other boards. You’ll need a laser engraver or CNC router to cut out those enclosures. Hominoids’ SBC Case Builder project attempt to automatize enclosure generation for SBCs using SBC Model Framework written in OpenSCAD. Work has focused on ODROID boards so far, but it should work for other vendors too. The parameters […]

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BGA socket allows RAM upgrades on SBCs

In most cases, both the eMMC flash and RAM are soldered on single board computers, but we’ve previously boards with eMMC flash modules that allows to optionally add storage of various capacity and speed. But today I learned something similar exists for RAM chips with a socket that allows you to clip a BGA chip to change RAM capacity. The BGA socket is simply soldered on the board instead of the RAM chip itself, and as demonstrated on the MangoPi MQ Pro board, you could then insert the chip on the board instead of soldering it. Those are the specifications of the “DDR3x16-96” socket used above: Materials Socket base: LCP (liquid crystal polymers) Contacts: BeCu (Beryllium Copper), selective Au-Au flash over Ni plating Insulation resistance – 1000 MOhm or more at DC 100V Dielectric withstanding voltage – 100V AC for one minute Contact resistance – 50 mOhm max, at 10mA […]

Khadas VIM4 SBC