Migrated from Debian 32bit to 64bit through dual boot

May 16, 2016

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openlogo-100

The desktop where I do most of my stuff is a Debian testing 32bit. Recently Google Chrome team declared the end of support of 32bit Linux distributions, and I decided to take the occasion to migrate towards a 64bit Debian. I read some guides around, some old, some with big warnings and disclaimers, some interesting. Ultimately I […]

Posted in: Software

Inline assembly in GCC [linux-insides]

May 2, 2016

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The news site lwn just posted a guide on GCC inline assembly. The guide is written in plain colloquial language and is a great complement to GCC documentation on the matter, which is more of a reference of the various functionalities. I found that the extended form of inline assembly is a powerful way to use the machine special […]

Posted in: Embedded

Linus Torvalds interview at TED

April 11, 2016

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Tux

Chris Anderson, the creator of TED, interviews Linus Torvalds on the traits that are useful to create and maintain something remarkable as Linux. Linus appears as his usual self, joking about his own defects, and being overall very lucid in its analysis of the current status of Linux kernel and what happened to get there. He […]

Posted in: Software

Simple time synchronization for the Internet of Things

February 18, 2016

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Network-time-icon

While adding HTTPS capabilities to my STM32 Nucleo board, I needed to solve the problem of current time. This is because TLS needs to check certificate expiration date, so we need a sufficiently accurate estimation of time. So I tried to understand what could I do to ask a network server about the time. I […]

Posted in: Embedded

HTTPS client on STM32 Nucleo-F411RE

February 4, 2016

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nucleo_w5100

One of my goal of the past months was to use an STM32 Nucleo board to get a webpage through HTTPS, using an Ethernet shield for TCP/IP stack. I was close last time, but I discovered that my Nucleo-F103RB did not have enough RAM. Now I have my hands on a Nucleo-F411RE that has 128KiB of RAM […]

Posted in: Embedded

20 security tips for Data Privacy Day 2016

January 28, 2016

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The 28th of January has been declared the Data Privacy Day, a moment where we spread awareness on how personal information is managed, both by us and by the entities that have access to it. For the occasion, I put together a list of tips and food for thought; feel free to share it and […]

Posted in: Security

STM32 NUCLEO-F103RB has low resources for TLS 1.2

January 10, 2016

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nucleo_w5100

It’s been months since I started playing with a STM32 Nucleo + Ethernet shield. One of the objectives that I chase is to build a device for the Internet of Things that implement reasonably secure communications. In an effort to avoid reinventing the wheel (or at least to not reinvent too many wheels) I wanted to see if […]

Posted in: Embedded
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