Programming Category - Page 12 of 43 - CNX Software

August 6, 2018 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

WiFiBoy32 is an ESP32 Portable Game Console and IoT Devkit

I’ve noticed that ever since Hardkernel launched their ODROID-GO “10th anniversary” portable game console based on ESP32 processor, most of the talk on IRC and social media is about this new toy, and people almost seem to have forgotten about the company’s Arm Linux boards 🙂 But recently, I’ve come across a somewhat similar ESP32 device called WiFiBoy32 that acts as both a portable game console and an IoT development kit. WiFIBoy32 specifications: Wireless module – ESP32-WROOM-32 wireless module with 802.11 b/g/n WiFi and Bluetooth 4.2 LE connectivity Display – 2.4″ 240×320 color SPI TFT LCD display Expansion – 2x 8-pin through holes with GPIOs, SPI, DAC, I2S,ADC, VP/VN, and power signals (3.3V, Vin, GND) Misc Top – 6x large gaming buttons, select and start push buttons, buzzer Bottom – PROG and RESET buttons, user LED USB – 1x micro USB port for power and programming (CP2102) Dimensions – 120 […]

July 25, 2018 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Coocox CoIDE and GCC Arm Embedded Toolchain Download Links

I’ve been playing with RAK811 LoRa GPS tracker last week-end and earlier this week, and Rak Wireless provides open source firmware for the board that can be work on with Arm Keil or Coocox CoIDE tools. The former requires registration, and the latter is freeware and appears to be preferred by Rakwireless guys. The only problem is that CooCox website have been down for several days, so I could not download the IDE from the official website. So instead I downloaded it from Softpedia together with a GCC toolchain. Sadly the version in Softpedia and the toolchain are outdated, so the firmware won’t build. I had installed CooCox CoIDE v 1.7.8 with GNU Tools ARM Embedded 4.7 2013q. Rakwireless engineers informed me they used CoIDE v 2.0.6 with gcc-arm-none-eabi-5_4-2016q3-20160926-win32. I could not find it online, so they added both to their RAK811 documentation. You’ll find the two files under Tools: […]

July 16, 2018 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

KidBright32 Board is Thailand’s BBC Micro:Bit Equivalent

BBC Micro:Bit board was first announced in July 2015. Designed for STEM education, the board was then offered to UK schools in March 2016, and a few months later UK store would start selling it worldwide. It’s now available pretty much anywhere, and you can likely find it in a local store or online. The Thai government must have seen this, and thought to themselves “If the British can do it, we can do it too!”, as the National Electronics and Computer Technology Center (NECTEC) part of Thailand’s Ministry of Science and Technology designed KidBright32 board and courses to teach STEM to Thai students. The board is based on Espressif Systems ESP32-WROOM-32 WiFI and Bluetooth module, and comes with large holes for power (5V/GND) and 6 digital inputs/outputs, smaller through holes for I2C and more I/Os, as well as an I2C header. We’ll also find some LEDs, two dot matrix […]

June 28, 2018April 13, 2021 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Visual Studio 2017 with an Embedded Linux Arm Device

This is a non-sponsored guest post written by Marc Goodner: Principal Program Manager, Microsoft, and Jeremias Cordoba: Innovation Engineer, Toradex. Today many embedded devices run some flavor of Linux as their primary operating system. This poses a challenge to developers who run Windows on their development machine. This article explains a new way to use the latest Visual Studio for C++ development on an embedded Arm Devices from a Windows Host PC using containers for the build environment. The device we are deploying to is from the Toradex Colibri Family of System on Modules using the NXP i.MX 6ULL SoC, which features an Arm Cortex A-7. As a demo project, we will connect a Bluetooth Sensor with the Toradex Colibri Module. Please note that Visual Studio support for this case is in an early state, you will see improvements from Microsoft and Toradex in the coming months. Prerequisites Colibri i.MX 6ULL […]

April 14, 2018April 14, 2018 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Optimizing JPEG Transformations on Qualcomm Centriq Arm Servers with NEON Instructions

Arm servers are already deployed in some datacenters, but they are pretty new compared to their Intel counterparts, so at this stage software may not always be optimized as well on Arm as on Intel. Vlad Krasnow working for Cloudflare found one of those unoptimized cases when testing out Jpegtran – a utility performing lossless transformation of JPEG files – on one of their Xeon Silver 4116 Server:

vlad@xeon:~$ time  ./jpegtran -outfile /dev/null -progressive -optimise -copy none test.jpg

real    0m2.305s
user    0m2.059s
sys     0m0.252s

vlad@xeon:~$ time ./jpegtran -outfile /dev/null -progressive -optimise -copy none test.jpg

real 0m2.305s

user 0m2.059s

sys 0m0.252s

and comparing it to one based on Qualcomm Centriq 2400 Arm SoC:

vlad@arm:~$ time ./jpegtran -outfile /dev/null -progressive -optimise -copy none test.jpg

real    0m8.654s
user    0m8.433s
sys     0m0.225s

vlad@arm:~$ time ./jpegtran -outfile /dev/null -progressive -optimise -copy none test.jpg

real 0m8.654s

user 0m8.433s

sys 0m0.225s

Nearly four times slower on a single core. Not so good, as the company aims for at least 50% of the performance since the Arm processor has double the number of cores. Vlad did some optimization on The Intel processor using SSE instructions before, so he decided to look into optimization the Arm code with NEON instructions instead. First step was to check which functions may slowdown the […]

April 3, 2018 by Jean-Luc Aufranc (CNXSoft) - No Comments

Embedded Systems Conference 2018 Schedule – IoT, Security, Artificial Intelligence, and More

The Embedded Systems Conference takes place each year in Boston, US in April or May. This year, the event will occur on April 18-19, and the organizers have published the schedule with 7 tracks: Advanced Technologies, Center Stage (free), Embedded Hardware Design & Verification, Embedded Software Design & Verification, IoT and Connected Devices, Keynotes (free) and Special Event (free). Even if you can’t attend, it’s always useful to have a look at the schedule to learn about potential industry developments. So I’ve made my own virtual schedule with some of the sessions I found relevant to this blog. Wednesday, April 18 8:00 – 10:00 – An Introduction to RTOS by Jean Labrosse (Software Architect, Silicon Labs) This tutorial will help you understand what RTOSs are and how they work so that you can make better use of their features. The class will explain what an RTOS is and why you […]

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 […]

November 22, 2017November 23, 2017 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

JeVois-A33 Linux Computer Vision Camera Review – Part 2: Setup, Guided Tour, Documentation & Customization

Computer Vision, Artificial Intelligence, Machine Learning, etc.. are all terms we hear frequently those days. JeVois-A33 smart machine vision camera powered by Allwinner A33 quad core processor was launched last year on Indiegogo to bring such capabilities in a low power small form factor devices for example to use in robotics project. The company improved the software since the launch of the project, and has now sent me their tiny Linux camera developer kit for review, and I’ve already checked out the hardware and accessories in the first post. I’ve now had time to test the camera, and I’ll explained how to set it up, test some of the key features via the provided guided tour, and show how it’s possible to customize the camera to your needs with one example. Getting Started with JeVois-A33 In theory, you could just get started by inserting the micro SD card provided with […]