How to boot Xen over PXE and NFS on PC Engines apu2

From time to time we face requests to correctly enable support for various Xen features on PC Engines apu2 platform. Doing that requires firmware modification, which 3mdeb is responsible for. Xen…

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Basics of x86 assembly (AT&T syntax)

Introduction Nowadays, application of programming in assembly language is very small. Writing production code in assembly may be found in the most demanding tasks in embedded. Even in modern……

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The art of disassembly

Probably there has never been a programming language that would fascinate me as much as assembly. In fact, it was my second "real language" (after Pascal/Delphi and DOS batch) and the first one I…

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Building UEFI based firmware on MinnowBoard

Building EDK2 based firmware for MinnowBoard There are some options to build firmware for MinnowBoard, a Bay-Trail-based SBC (Single Board Computer) from Intel. We usually prefer coreboot as……

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Building coreboot for MinnowBoard Turbot

Building coreboot on well-supported platform such as Bay Trail is a quite straightforward task, however, we need to remember about some things in order to have coreboot working. First of all, we need…

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Minnowboard Turbot remote firmware flashing with RTE (Remote Testing Environment)

Introduction Work related to a hardware carries some restrictions which don't occur when working only with a software. One of them is a limited number of devices. This one may cause a problem with a…

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Flashing eMMC on Hummingboard Edge using fastboot? part 1

Introduction Flashing an eMMC of produced board is one of the crucial manufacturing procedures. This post series presents how one can take advantage of i.MX6 features and open source tools to prepare…

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Robot Framework? Using Request library for control RPI GPIO’s

Requests library is one of the most popular libraries implemented for Robot Framework. It is very important for testing distributed applications, so this is the first library I got to know in the…

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ssh reverse tunnel for PXE, NFS and DHCP setup on Qubes OS

At some point, I stuck in the forest with WiFi connection and no physical access to the router to create nice networking for my coreboot development needs. Recently I switched my laptop to Qubes OS…

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Flashing MinnowBoard Turbot with Raspberry Pi Zero W

Recently we started preparation of coreboot training for one of our customers. Our platform of choice for that training is MinnowBoard Turbot. There are couple reasons for that: During training we…

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UEFI/EDK II CorebootPayloadPkg on PC Engines apu2

Recently we were reached by person interested in running CoreOS on apu2. CoreOS is a very interesting system from security point of view. It was created to support containers and scalability out of…

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PC Engines apu2 python Robot Framework validation automation

Recently we attended ECC2017 conference. One of topics that we considered was a system for development and validation automation. Unfortunately this talk was not accepted, but we present some…

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How to handle a DHT22 sensor using ARM mbed OS?

Recently I have encountered with temperature and humidity measurements using DHT22 sensor. I was developing a driver source code in ARM mbed OS SDK on particular STM32 NUCLEO L432KC platform.…

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How to use Ansible via Python

Ansible is designed around the way people work and the way people work together What is Ansible Ansible is simple IT engine for automation, it is designed for manage many systems, rather than just…

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SWUpdate for feature-rich IoT applications

When you work with embedded systems long enough, sooner or later you realize that some sort of update mechanism is required. This is especially true when more complex systems, running with an…

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